INSTALLATION AND START-UP MANUAL HC BUS CONTROL SYSTEM INSTALLATION MANUAL - FULL VERSION EN

Transcription

1 INSTALLATION AND START-UP MANUAL HC BUS CONTROL SYSTEM INSTALLATION MANUAL - FULL VERSION EN Subject to technical changes Valid from September Construction Automotive Industry

2 TABLE OF CONTENTS Hazard and safety information System overview Area of application of the system System components HC BUS manager HC BUS manager (slave) HC BUS room unit HC BUS manager extension (V module/ft module) Used terms for the system components System limits Maximum number of usable components Maximum number of controllable devices/functions Usable heating/cooling systems System topology Typical system structure (example) Basic functions Selection of operating mode Flow temperature regulation Room temperature regulation Dehumidification Fan coil function Functional description Operating modes Comfort levels Automatic mode (heating/cooling) Automatic mode (heating only) Automatic mode (cooling only) Manual heating mode Manual cooling mode Definition and operation of mixed circuits for different systems Available systems Individual parameterisation of the heating circuits Heating mode Starting the feeding mode Heating curve Room temperature impact Boost Mode Cooling mode Triggering of the cooling mode Calculating the flow temperature Dew point monitor Dehumidifier control Summer compensation Flow temperature regulation Demand heating/cooling device Room temperature regulation Time switch programs, normal and reduced mode Day timer, week timer Switch of the comfort levels normal / reduced via HC BUS room unit Optimisation of the return from the reduced operating mode Heating period specification Fan coils Demand for fan coils Control via HC BUS room unit Utilisation of several heating/cooling systems in one room Configuration Examples Monitoring of the temperature of heated and cooled surfaces Possible measuring methods Function in the heating scenario - maximum temperature reached Function in the heating scenario - minimum temperature not reached Function in the cooling scenario - minimum temperature reached Control via digital signals Comfort level control Summer/ winter mode Demand signals Universal alarm Window contact Concrete core temperature control (BKT, TABS) Basic information about the function Heating mode Cooling mode Function heating in accordance with EN Interfaces to central building control systems Use of a web card System access within the building Internet access Overview of functions Overview pages Setting options for the user Monitoring and alarm functions Service functions for the specialist System behaviour during malfunction Planning information Selection of components Determination of the desired functions Calculating the number of required outputs, and determining the respectively required modules Planning of installation locations, new calculation of the number of modules Planning of circuit design Used lines Circuit diagram system overview Circuit diagram bus system Circuit diagram HC BUS manager / HC BUS manager (slave) Circuit diagram HC BUS manager extension as V module Circuit diagram HC BUS manager extension as FT module Circuit diagram bus termination Installing components Basic information about installation Installation of regulation components Ambient conditions that must be adhered to HC BUS manager HC BUS manager extension HC BUS room unit Room temperature probe RT-HC Bus shielding Bus termination

3 System start-up General procedure Systems with slave units Address setting of the HC BUS manager (plan address) Preparation of the fieldbus system for the HC BUS managers Address setting for HC BUS manager extension Address setting HC BUS room unit Basic information for the operation of the control Configuration assistant (Wizard) Entry of basic data Language selection Date/time Building type Schema selection Slave module Number of manifolds Number of mixed circuits Regulation mixed circuit Used systems Number of dehumidifiers Number of dew point monitors Test and definition of the bus environment Test of master/slave bus environment Test of the bus environment for HC BUS manager extension module Communication test of the HC BUS room units Definition of the mixed circuits Definition of the fan coils Release automatic mode Configuration of the in/outputs of the HC BUS managers General information about the configuration process Analogue inputs Analogue output Digital inputs Digital outputs Allocation of the HC BUS room units General Operating the configuration side Example configuration A, respectively only 1 system in a room Example configuration B, 2 systems in a room Allocation of room temperature probes Allocation of the dehumidifiers Allocation of the fan coils Allocation of the dew point monitor Definition of the rooms Configuration of the in/outputs of the HC BUS manager extensions General information Configuration of FT modules Configuration of the V modules Heating test/cooling test Systems with slave units Input of object-specific data Time programs Building characteristics Optimisation of the system Optimisation room temperature regulation Optimisation of flow temperature in a heating scenario Optimisation of flow temperature in a heating scenario Operation Operating concept Basic screens Base screen "System overview" Meaning of the used icons Basic screens "Rooms" Structure of the main menu Operating modes Comfort level selection Heating/cooling mode Using the menu Room manager Screen content Example page operation: Room manager Set values Using the setpoint pages Heating limit (S1) Adjustment flow temperature (S2) Switch on limit fan coils (S3, S4) Switch-on limits dehumidifier (S5, S6) Adjustment range of the room units (S7, S8) Room temperature holiday mode (S9) Summer compensation, maximum room temperature in cooling mode (SA) Start cooling mode (SB) Time functions Week timer Day timers Presetting of time programs Week timer for rooms Mixed circuits Dehumidifiers Party mode Holiday Heating period Date / Time Language System Diagnosis Rooms Settings Service Operation on the RAUMATIC BUS HC room unit Screen Setpoint adjustment Operating mode switching Fan coil control Switching to the operating mode "Standby" Display time Service and Parameterisation Service menu structure Heating parameters Preliminary Remarks General parameters Flow temperatures, boost function Heating circuit number n Heating curves Parameter cooling General parameters Cooling circuit number n PI Controller General parameters Heating circuit number n Cooling circuit number n Room temperature regulation Other parameters Screed heat

4 Devices Heater Cooling unit Dehumidifiers Pumps Valves Troubleshooting General errors Problems in heating scenario Problems in cooling scenario Input/output allocation HC BUS manager Preset assignment Additional possible allocations Permissible signal types HC BUS room unit HC BUS manager extension (FT module) Preset assignment Additional possible allocations Permissible signal types HC BUS manager extension (V module) Preset assignment Additional possible allocations Permissible signal types Appendix Predefined schemas Circuit diagrams Probe values Start-up protocol Index

5 1 HAZARD AND SAFETY INFORMATION Validity This installation and start-up manual is valid for the control system RAUMATIC HC BUS. Pictograms and logos Safety information Risk of fatal injury due to electric shock: The control components are operated with an electric current. Improper installation or improper repair attempts can cause a risk of fatal injury due to electric shock. The units and their accessories must not be opened. Repairs on the unit must only be carried out by the manufacturer. Never touch the electrical components with wet hands or with cleaning cloths! Legal information Important information Information on the Internet Standards and directives Observe the directives, standards, and regulations that are valid for the application in their current version, even if they are not mentioned in this document. Notes on the use of this manual For your own safety and of others, read this installation and start-up manual and the assembly manual carefully before beginning with the assembly. Keep this assembly manual and ensure that it is always available at the installation site. Intended use The components of the REHAU control system RAUMATIC HC BUS must only be used for the regulation, control, and monitoring of sub-floor heating and surface cooling systems in enclosed rooms. Applications and areas of applications, which are not described in this manual or on our technical information sheets require the consultation with the responsible sales office. Installation/start-up/maintenance: The installation, start-up and maintenance of all components of the control system must only be carried out by trained personnel with sufficient qualifications. The accident prevention regulations, all relevant standards, directives, and the provisions of the employers' liability insurance association must be adhered to. This also applies for work inside the control cabinet. Installation and start-up: Before beginning any work, the system must be de-energised, checked to ensure that it is not live, and secured against restart. The HC BUS manager controller of the REHAU control system RAUMATIC HC BUS must only be installed and put into commission by persons, who have been instructed by REHAU or their representatives and who have been informed about possible hazards. The control system parameters will be set up as part of the start-up work by the installation company based on the specific system. Only the installation company may change these parameters. An incorrect parameterisation, even with an otherwise defect-free functioning of the control system, may lead to an inefficient operation or, for example, to an excessive cooling of the floor or other surfaces causing the formation of condensate. Please do not carry out any unauthorised settings. Unauthorised modifications would also render your warranty invalid. Proper application The defect-free and safe operation of the REHAU control system RAUMATIC HC BUS requires proper transport, storage, assembly, installation, and start-up as well as careful operation. Electrical installation Safety fuses, switches, wiring, and grounding must be carried out in accordance with the local regulations for electrical installations. Wiring In conjunction with the wiring, a strict separation between the AC-230-V area and the AC-24-V low voltage area must be maintained in order to ensure the protection against electric shock. 5

6 Transport and storage The limit values indicated in the data sheets apply for the storage and transport of the RAUMATIC HC BUS system components. Maintenance Functioning of the overall system must be checked regularly through a specialised company. System parts located inside the switchbox will best be cleaned of dust and other dirt only through qualified personnel during normal maintenance appointments. The HC BUS room units can be cleaned with a soft dry cloth. General information Please take time to carefully read this manual. Even though the operation of the system is simple and self-explanatory, you can only optimally take advantage of the benefits if you have learned about all important functions of the system. Information on the internet Please also adhere to information about the utilisation of the system, which can be found on the website. 6

7 2 SYSTEM OVERVIEW 2.1 Area of application of the system The REHAU control system RAUMATIC HC BUS is used for the control and regulation of sub-floor heating and surface cooling systems inside of buildings. It covers the following tasks: --Activation of heating or cooling operation --Regulation of flow temperatures --Demand for heating and cooling device --Regulation of room temperatures --Activation of dehumidifiers --Activation of fan coils 2.2 System components The REHAU control system RAUMATIC HC BUS is a bus-based control system. All components within a system segment are connected via a conduit - the fieldbus system - so that the wiring expense remains low even for large systems HC BUS manager HC BUS manager (slave) Depending on the setting of its bus address, the HC BUS manager is either the primary unit of the system (master) or a subordinate unit (slave) to the master. For its system segment the HC BUS manager in its role of slave with a potential of up to 9 HC BUS manager connections thereby takes on the same control and regulation functions as the master as an extension of the master. It thereby expands the system options by exactly the same number of rooms, or flow temperatures that are to be controlled, dehumidifiers or coil fans as can be administrated by the primary master. The slave can trigger the heating or cooling operating mode independently for its system segment, to the extent that it is not in conflict with the operating mode of the overall system. There is no difference between the HC BUS manager (master) and HC BUS manager (slave) with respect to hardware or the used software. The master and slave units are connected with each other through the primary master/slave bus system. The master/slave bus system therefore provides the connection of the system segments with each other. The master/slave bus system is separated from the bus system, which is respectively controlled via an HC BUS manager HC BUS room unit Fig. 2-1 HC BUS manager The HC BUS manager is the essential regulation and control unit of the system. With the exception of installations such as for example larger office buildings or hotel facilities, it is the only central unit of the system fulfilling the "master" function. It activates automatically or manually upon demand the operating modes heating/cooling or neutral (neither heating nor cooling). It takes over the regulation of the flow temperature(s), the room temperatures, and the control of the dehumidifier and/or the fan coils. It also activates the heating and cooling devices. The HC BUS manager has an integrated operating display, but can also activate an external Display D-HC. Fig. 2-2 HC BUS room unit The HC BUS room unit is the operating unit installed in the rooms featuring room temperature and humidity probes. The user can change the currently applicable setpoint of the room temperature via the operating button and the backlit display. The operating keys allow changes of the comfort level "normal" and "reduced" and the activation of a fan coil. 1 HC BUS manager is respectively responsible for 1 system segment of the entire system. The first HC BUS manager functions as the master of the system. 7

8 Key functions: "Mode" key A change of the comfort level takes place with each keystroke, applicable only until the next switch point of the time program. The comfort levels are: --"Normal" corresponds with presence of the user in the room (comfort) --"Reduced" corresponds with the absence of the user (eco-mode) The active comfort level is illustrated through the icons and. "Clock" key The current time is shown "Fan" key This key is only effective if a fan coil is connected with this device. The fan coil is started as soon as the room temperature falls outside of the tolerance range by the room temperature setpoint value. The operating mode of the fan coil can be manipulated via the "Fan" key: --If the fan coil has been started, the operation is blocked for 30 minutes by pressing the keystroke --If the fan coil is inactive, the key triggers the start of the fan coil when the room temperature does not correspond with the setpoint but still falls within the tolerance range "Off / Standby" key Effects that the room is switched to standby until the next switch point of the time program: --In the cooling mode, the room is no longer cooled --In the heating mode, this room is maintained at the temperature for absence mode (holiday) HC BUS manager extension as V module The V module is the switch unit for the valve actuators that are installed in the outlets of the heating circuit manifolds. The room temperature regulation is realized by the control of the flow rate at the individual heating/cooling circuits. The V module can also be used to receive signals from the following probes: --Room temperature probes --Floor temperature probes --General probes that measure the return temperature or the temperature of the building sections that are to be temperature-controlled (for the use of building section temperature control) In addition, the V module controls the dehumidifiers and/or fan coils. HC BUS manager extension as FT module The FT module takes over the regulation of an additional flow temperature, e.g. for additional systems such as ceiling cooling or in general for areas that require a separate flow temperature Used terms for the system components The used components HC BUS manager and HC BUS manager extension can be used for different purposes. The purpose depends on the configuration of the system or for the HC BUS manager on the set address. Subsequently, the following terms will also be used as an abbreviation for the components: HC BUS manager: Master or Slave HC BUS manager extension: V module or FT module HC BUS room unit: Room unit HC BUS manager extension (V module/ft module) Fig. 2-3 HC BUS manager extension The HC BUS manager extension can be used in the RAUMATIC HC BUS control system for 2 different tasks: --As a switch unit for valve actuators (V module) --As a unit for the flow temperature regulation (FT module) The desired function will be specified during the configuration of the system. 8

9 2.3 System limits Due to its modular structure, the REHAU control system RAUMATIC HC BUS is equally suited for residential buildings as for office buildings. Depending on the number of the components that need to be controlled such as dehumidifiers, fan coils or additional flow temperature control stations, one central controller (HC BUS manager) in one system segment can control between about 20 and 50 rooms. The use of additional central controller HC BUS managers (slave) and thereby additional system segments are only necessary in larger installations, for example office buildings or hotel facilities, whereas each additional slave offers the same number of connection options. Up to 9 HC BUS managers (slave) can be connected so that systems with 200 to 500 rooms can be realized. For the maximum extension level, a total of 10 segments with one master and 9 slaves is therefore possible. The table below shows an example of the maximum number of rooms and devices that can be realized with one system consisting of an HC BUS manager (1 system segment). Depending on the installation situation, in reality the number for the rooms that need to be controlled is slightly lower: This is due to: --The utilized modules which switch the valves at the heating circuit manifolds and which each have 4 switch outputs --The modules each being installed within or close to a heating circuit manifold cabinet --Additional lines for switch signals between the manifold cabinets should be avoided Example Number of flow temperature Rooms Dehumidifiers Fan coils *) *) Dehumidifiers with additional cooling function are accounted for like fan coils Maximum number of usable components HC BUS manager (master): 1 HC BUS manager (slave): 9 V module (per master or slave): 15 FT module (per master or slave): 5 Total number of V modules and FT modules (per master or slave): 15 HC BUS room units (per master or slave): 50 It needs to be ensured that the maximum extension level always applies for only one of the devices or functions. The number of controllable rooms is reduced by: --each dehumidifier (by 2) --each fan coil (by 1) --each additional flow temperature (by 4) Additional details can be found in the planning information Maximum number of controllable devices/functions All information refers to one HC BUS manager. With each HC BUS manager (slave) the quantity increases by the same amount. Room temperature regulation 50 rooms Flow temperatures 5 Dehumidifiers10 Fan coils Usable heating/cooling systems The following heating and cooling systems can be supplied: --Floor --Wall --Ceiling --Concrete core temperature control (BKT) All listed systems can also be used in combinations, including different systems in the same room. 9

10 2.4 System topology HC BUS Manager (Master) HC BUS Manager (Slave, for system segment #2) Master/Slave Bus Field bus to further slaveunits HC BUS Room Units Field bus FTmodule FTmodule V- module V- module V- module HC BUS Room Units V- module V- module system segment #1 system segment #2 Master/Slave Bus Fig. 2-4 System topology with master/slave bus system and fieldbus system for HC BUS room units and HC BUS manager extension module 10

11 2.5 Typical system structure (example) The graphic below shows a typical system structure with a system featuring 9 rooms, which are supplied on 2 levels via 2 manifolds. There is one dehumidifier per level. HC BUS Manager (Master) V-module #3 V-module #1 V-module #4 V-module #2 manifold cabinet 2 Dehumidifier 2 manifold cabinet 1 Dehumidifier 1 Fig. 2-5 Typical system structure 11

12 2.6 Basic functions the RAUMATIC HC BUS control system Regulates fully automatically all components of one sub-floor heating/cooling system. The following functions are integrated: --Flow temperature regulation --Room temperature regulation --Dehumidifier control --Fan coil control --Demand for heating unit, cooling unit The set values for the room temperatures as well as the operating times for dehumidifiers and fan coils are controlled via week timers. The operating mode (neutral/heating mode/cooling mode) is automatically selected in the automatic mode through the system based on the applicable ambient conditions, but can also be specified by the user. Cooling scenario For a cooling scenario, the specification of the setpoint of the flow temperature is also based on the parameterisation of the circuit; in addition, the highest dew point determined for the rooms that belong to the respective circuits is taken into consideration Room temperature regulation The room set values are defined separately for heating and cooling scenarios as well as for the normal mode and reduced mode and are loaded based on time programs. The time programs do not indicate the starting point of the new operating mode but the desired point in time at which the new setpoint is reached. In this context, the system determines automatically the correct point in time at which the heating or cooling of the room needs to be started. The calculated output signal of the controller is converted into a cycling on/off switch signal Selection of operating mode Automatic operating mode In the automatic operating mode the switch between the operating modes neutral/heating/cooling takes place based on the ambient conditions. "Ambient conditions" means the current and time-filtered exterior temperature, which takes the storage behaviour or the inertness of the building into consideration, as well as the temperature of the rooms defined as pilot rooms. Manual operating modes For the manual operating modes you can select between "Heating only", "Cooling only", "Manual heating" and "Manual cooling". Operating modes "Heating only" and "Cooling only" represent a semi-automatic operating mode. The active operating modes are started as soon as the ambient conditions require that. The operating modes "Manual heating" and "Manual cooling" start the operating mode heating or cooling without taking the ambient conditions into consideration, however, the flow temperature is based on the ambient conditions. However, a minimum flow temperature is used in the manual heating mode - as long as the outside temperature would not require heating - so that an effective heating operation is possible Dehumidification Each room can be allocated to one dehumidifier (also a joint dehumidifier for several rooms). If the relative air humidity or the calculated dew point exceed the specified limit value, the dehumidifier is started if its time program allows the operation. You also have the option to start the dehumidifier in case of higher humidity values outside of the times defined by the time program Fan coil function Each room can be allocated to a fan coil, however, it is not possible to allocate several rooms to a joint fan coil. The fan coil can be defined for the operating mode and "Heating", "Cooling" or "Heating and cooling". The fan coil is started as soon as the room temperature falls outside of the tolerance range by the setpoint. The start of the fan coils can be triggered via the "Fan key" of the HC BUS room unit as soon as the room temperature falls outside of a narrow range around the setpoint. If the fan coil should already be running, the operation can be blocked for 30 minutes by pressing the fan key Flow temperature regulation By default, the flow temperature regulation is adopted for the first mixed circuit through the HC BUS manager (master or slave). Additional circuits are regulated through the (maximum of 4) FT modules. A mixed circuits are only called upon if one of the connected rooms reports a need. Heating scenario For a heating scenario, the specification of the setpoint for the flow temperature is based on the parameterisation of the circuit, based on the current (time-filtered) outside temperature as well as the room temperatures that apply in the pilot rooms. 12

13 3 FUNCTIONAL DESCRIPTION The following functional description ( P) refers to parameters that affect the described behaviour. The description of the access to the parameters takes place by indicating the path (the first two steps are omitted) Service Parameter Heating Flow temperature Floor/wall P V01 "Starting point heating curve standard operation" 3.1 Operating modes The operating mode of the system is derived from the combination of the comfort level and the release of the heating/cooling mode Comfort levels All releases of the heating/cooling mode described below can be combined with the following comfort levels: Standby Heating: only frost protection Cooling: Off Timer Time-controlled switch between normal mode and reduced mode based on time programs (by zone) Normal Normal mode in the entire system (across all time zones) Reduced Reduced operation in the entire system (across all time zones) Automatic mode (heating/cooling) The system switches independently between operating modes heating/neutral/cooling. Switch to the heating mode: The heating mode is started within the defined heating period when the timefiltered outside temperature falls below the heating limit. The heating limit is applied to the time-filtered outside temperature and is specified globally for the entire system. However, the starting point of the heating mode can be changed relative to the heating system via the setting of the filter period, which applies individually for each heating system. See Chapter Switch to cooling mode: The cooling mode is triggered when the cooling criterion calculated based on different measuring values is met Automatic mode (heating only) In this operating mode the system can only be in the automatically triggered operating mode "Heating" or "Neutral". The cooling mode is blocked Automatic mode (cooling only) In this operating mode the system can only be in the automatically triggered operating mode "Cooling" or "Neutral". The heating mode is blocked. When the frost protection criterion is met, the system automatically switches to the comfort level "Standby" and the frost protection function is triggered Manual heating mode The system is in permanent heating mode. The regulation of the flow temperature takes place via the integrated heating curve functions, whereas the value, that applies during a heating operation of 10 C exterior temperature, applies as the minimum value for the flow temperature Manual cooling mode The system is in permanent cooling mode. When the frost protection criterion is met, the system automatically switches to the comfort level "Standby" and the frost protection function is triggered. Heating General parameters P H1 Heating limit normal mode"/ P H2 "Heating limits absence mode" 13

14 3.2 Definition and operation of mixed circuits for different systems The system can manage a maximum of 5 mixed circuits. Each circuit can be allocated to a heating/cooling system and individually adjusted. The selection of the available systems depends on the installed systems indicated in the configuration. It can be specified for each circuit whether it is used for the operating mode heating, cooling or heating and cooling. 3.3 Heating mode The heating mode applies as soon as one of the mixed heating circuits switches to the heating mode. Due to the possibility to set different parameters for the heating circuits, not all heating circuits switch to the heating mode at the same time. This means that at a certain time only parts of the building are in heating mode or only one of the installed heating systems is in operation in certain rooms Available systems --Floor --Wall --Ceiling --Concrete core temperature control (BKT) Individual parameterisation of the heating circuits Globally applicable assigned parameters exist for all systems ( Heating General parameters) where the conditions are specified for the start of the heating mode as well as the frost protection mode. Furthermore, the basic specific parameterisation exists for each system type, which is copied one time into the parameters set of the respective circuits when a mixed circuit is allocated to a system. The system-specific parameter set refers to --the permissible flow temperatures --the heating curve --the filter time for the calculation of the filtered exterior temperature --the pilot room impact --the boost function (start-up optimisation) Example: Access to the parameter set for ceiling heating: Heating Flow temperatures Ceiling This copy of the standard parameters set that was set up for each circuit can also be adjusted individually for each circuit. Heating Heating circuit #n Via this adjustment is also possible for example to achieve that during the transition time rapidly responding systems are given priority with respect to the start: For example, if you reduce the filter time constant ( P) of another heating circuit for a ceiling heating system compared to the floor heating circuit, during the first cooler periods this system is started before the floor heating system. The heating mode can be limited in the user menu (time functions) to a defined heating period Starting the feeding mode Impact of the outside temperature To compensate the short-term as well as the periodic day/night outside temperature fluctuations, and to take the inertia of the building into consideration, the start of the heating mode is triggered by the time-filtered outside temperature when the heating limit is not reached ( P). Heating General parameters P H1 Heating limit normal mode" / P H2 "Heating limits absence mode" The heating limit is globally specified for the entire system. However, the time filtering of the outside temperature can be set separately for each mixed circuit and therefore for each heating/cooling system. Through the setting of the filtered time period, it is also possible to select the utilisation point of the heating mode as well as the speed with which the flow temperature is impacted by the outside temperature to correspond with the heating system. See Chapter Pilot room influence on heating limit The temperature measured in the pilot rooms is compared with the values that apply according to the time program. If the setpoint is not undercut in any pilot room, the average value of the overrun is calculated and applied to the heat limit via a factor ( P). In this case, the start of the heating mode is delayed. However, if the setpoint is not met in at least one pilot room, the average deviation of all rooms requiring cooling will be applied to the heat limit. In this case, the start of the heating mode is moved up. Heating Heating circuit #n "Pilot room influence on heating limit" Heating Heating circuit #n P HL0n "Filter time for outside temperature" 14

15 3.3.2 Heating curve The heating curve of the individual heating circuits is defined via the parameters stored in the parameter area. Heating Heating circuit #n Available parameters: --Start point --Slope --Minimum value --Maximum value The parameters vary for the operating modes Normal and Absent (holiday). Via a week timer you also have the option to switch the flow temperature to the reduced mode in specific time intervals. For that, also see the standard heating curves for different systems in Chapter 8 Service and Parameterisation Room temperature impact Rooms defined as pilot rooms impact the setpoint of the flow temperature by carrying out the correction of the setpoint that applies according to the heating curve upward/downward in case of an undercutting/exceeding of the set values. For multiple pilot rooms an average value will be formed based on the deviations. The impact level is derived from the parameter ( P) "Room temperature compensation factor" which indicates the correction in K/K. Heating Heating circuit #n P HEn room temperature compensation factor Boost Mode The boost mode or start-up circuitry accelerates the reheating of the rooms after a reduced operation phase. The condition for this function is that the mixed circuits are equipped with a return temperature probe. The recorded return temperature is compared with a calculated value, which is derived from the applied heating curve with a slope that is reduced via a an adjustable percentage rate ( P). The boost mode is always only activated for a limited time period ( P), after that there will be a pause time ( P). Heating Flow temperatures boost mode 3.4 Cooling mode The cooling mode is triggered when no mixed circuit is in heating mode and the cooling criteria has been met Triggering of the cooling mode The cooling criteria is determined separately for each mixed circuit. The following values are processed: --Outside temperature (current value) --Outside temperature (time-filtered value) --Pilot room temperature(s) --Trend of the pilot room temperature(s) The switching to the cooling mode takes place on a need basis and on an anticipatory basis through the utilisation of the room temperature information. Cooling General parameters Calculating the flow temperature The flow temperature in a cooling scenario is based on system-specific limits, comfort criteria, and the condensation issue. System-specific specifications A minimum flow temperature in the cooling mode must be specified for each mixed circuit. The standard value is 16 C. Cooling Cooling circuit #n CAn "Minimum flow temperature in normal mode" Limitation through determined dew point For all rooms allocated to a specific mixed circuit, the least favourable, meaning the highest value, will be determined based on the calculated dew point values. The flow temperature in a cooling scenario is kept in an adjustable safety margin ( P) to the dew point value. A sufficient safety margin must be selected depending on the applicable conditions. It must be ensured that --as a matter of principle, all measuring values have a certain level of inaccuracy --the surface temperature of the cooled areas can be close to the flow temperature depending on the ambient conditions --a correction of flow temperature due to a rapidly increasing room humidity only has an impact on the surface temperature after a more or less longer period of time depending on the system Condensation on the cooled floors can lead to damage on the components and in conjunction with cooled floors it can lead to accidents due to the associated risk of slipping. Cooling Cooling circuit #n CBn "Safety distance to dew point" 15

16 Limitation due to temperature of the cooled surfaces For comfort purposes, the cooled surfaces must always have a systemdependent as well as a user-specific sensory-based minimum temperature. The monitoring of this temperature can take place via probes that are integrated in the component or indirectly through the measuring of the return temperature. The respective limit values can be set separately. Cooling Cooling circuit #n CCn Element temperature limit in cooling mode Cooling Cooling circuit #n CCn "return temperature in cooling mode" Dew point monitor An allocation of the dew point monitor to a mixed circuit as well as to up to 10 dehumidifiers takes place in the configuration. Up to 30 dew point monitors are possible per system segment. When a dew point monitor is triggered, the circuit allocated to the dew point monitor is stopped. The allocated dehumidifiers are started for at least 30 minutes, even if the set limit values have not been exceeded Dehumidifier control The dehumidifiers are allocated to rooms, whereby several rooms can have access to the same dehumidifier. To rule out a potential noise stress through a running dehumidifier at certain times, the dehumidifiers are associated with timer programs which allow the operation in the presetting between 6 AM and 10 PM. The dehumidifiers are started when the relative humidity or the calculated dew point of the allocated rooms exceeds an adjustable limit value ( P) und and when this is permitted by the time program. Service Devices Dehumidifier DD1 "Activation limits relative humidity"; following parameters However, the dehumidifiers can also be started when a second user-adjustable relative humidity limit is exceeded during the blocking periods of the time program Summer compensation To avoid an excessive difference between the outside temperature and the temperature in the cooled rooms, the room temperature setpoint value is gradually increased up to a maximum value when a certain outside temperature is reached ( P). This function can be blocked ( P). Cooling General parameters C12 "Release of summer compensation"; as well as following parameters The maximum permissible set room temperature can be adjusted in the user zone. 3.5 Flow temperature regulation The flow temperature regulation is realized through a PI -(Proportional Integral) controller. The 0 10 V output signal of the HC BUS manager or the HC BUS manager extension module that is used as a FT module is suitable to operate a 3-way mixer or a 3-way mixing valve. PI controller General parameters PI controller Heating circuit #n PI controller Cooling circuit #n 3.6 Demand heating/cooling device Heating and cooling devices are demanded via contact-making. The demand takes place during the operation of at least one mixed circuit if the mixing valve is at last 60 % open (presetting, P). Delay time before demand, minimum runtime and minimum pause time are also parameterisable. Service Devices Heater Service Devices Chiller To protect the compressors, minimum runtimes and pause times apply for the operation of the dehumidifiers ( P). Service Devices Dehumidifiers DD5 "Minimum runtime dehumidifiers" Service Devices Dehumidifiers DD6 "Pause time dehumidifier" 16

17 3.7 Room temperature regulation For each room, a setpoint can be defined for the comfort levels "Normal" and Reduced" with respect to the heating and cooling mode Day timer, week timer 20 day timers are available which can be flexibly combined in 10 week timer programs. A day timer can feature up to 4 time phases for the normal mode. Presetting of time programs Rooms: Week timer 1 Flow temperatures Week timer 5 Dehumidifiers Week timer 10 Fig. 3-1 Specification set values Week timer 1: Mon - Fri Day timer 1 Sat / Sun Day timer 2 The time control is also specified through the allocation of the room to a time zone (week timer). If no allocation to a time zone takes place, the comfort level "Normal" applies at all times. The room temperature control is carried out as PWM (pulse-widths-modulation). This means that the percentage-based heating or cooling demand calculated for each room is implemented in a more or less long opening of the valves on the manifolds. The opening of the valves take place synchronously so that the pump runtime is significantly reduced through the integrated pump logic in case of a lower heating or cooling requirement. Week timer 5: Mon - Fri Day timer 5 Sat / Sun Day timer 6 Week timer 10: Mon Sun Day timer 1 Day timer 1: Residential building: 6 AM - 10 PM Office building: 7 AM - 6 PM 3.8 Time switch programs, normal and reduced mode The time switch programs are applied to: --Set temperature values, thereby also to the fan coils linked with the room --Flow temperature regulation --Dehumidifiers For room temperatures and flow temperatures the in comparison to the normal mode reduced outputs in the reduced operating mode generate a lower energy consumption in the heating and cooling mode. However, the lowering (in the cooling mode the increase) of the flow temperature is only sensible, when all supplied rooms are in the reduced mode during the same time period. In addition to energy-savings, the time switch programs for dehumidifiers (also refer Chapter 3.4.4) are also used to reduce noise. Time switch programs indicate the time periods of the normal mode. If no week timer is allocated to a room, a regulated flow temperature or a dehumidifier, the permanent normal mode applies (comfort). Pre-assigned programs are allocated to the units as a standard procedure. Day timer 2: Residential building: 7 AM - 11:30 PM Office building: - Day timer 5: Residential building: Office building: 2 AM - 9 PM 2 AM - 5 PM Day timer 6: Residential building: 2 AM - 11 PM Office building: - Day timer 10: Residential building: Office building: 6 AM - 10 PM 24 hours Switch of the comfort levels normal / reduced via HC BUS room unit At the HC BUS room unit the current comfort level is indicated by the icons /. By pushing the mode key, you can switch between the comfort levels "Normal" and "Reduced". The selected comfort level applies until the next switch point of the time program and has been replaced by the according to the time program applicable level. 17

18 3.8.3 Optimisation of the return from the reduced operating mode The time programs illustrated in the previous section indicate the desired utilisation period with respect to the room temperatures, not the desired start of the heating up/cooling down phase. The system determines independently the suitable point in time to start the heating up or the cooling down phase Configuration During the configuration of the system, the installed systems and the mixed circuits are defined, the circuits are allocated to the existing manifolds. In an additional configuration step, the probes that are installed in the rooms - HC BUS room units or room temperature probes - are allocated to the manifolds and the existing systems Heating period specification A time period can be specified in the area "Timer functions", within which the automatically starting heating mode is permitted. The manual activation of the heating mode is also possible outside of the defined heating period. The frost protection function is guaranteed at all times. Beyond the general definition of a room for the pure heating mode, heating/ cooling mode or pure cooling mode, the operating mode can be specified for each system that exists in the room. For example, a room can feature a ceiling system, which is connected to a manifold supplied by a mixed circuit for ceiling heating/cooling, and this ceiling system can thereby also only be used in the cooling mode. 3.9 Fan coils Fan coils can be used as a support measure in a heating and/or cooling scenario. The functioning is specified in the configuration run Demand for fan coils The activation takes place as soon as the tolerance ranges defined in the user level (presetting 1 K) are left and fall below (or in a cooling scenario rise above) the setpoint. If the room is in reduced mode, no demand for the fan coils will take place Examples Example 1: Floor heating/cooling and ceiling heating/cooling in a building; 2 mixed circuits 2 mixed circuits are installed in a building, which were defined for --Floor heating/cooling --Ceiling heating/cooling. The rooms feature systems, which are used for heating and cooling according to the following table: There are no separate time programs for fan coils. As a matter of principle, fan coils are only approved during the "Normal" operating times of the room Control via HC BUS room unit The display of the HC BUS room unit indicates the status of the fan coil in the top right area. Fan coil active: The displays shows the fan icon and 3 bars. In this case, the fan coil can be blocked for 30 minutes by pressing the fan key on the room unit. Another push of the key releases the operation of the fan coil again. Fan coil inactive: In this case, one push of the fan key can trigger the demand for the fan coil. In this case, the fan coil runs until the setpoint of room has been reached. Floor Ceiling H C H C Residential X X Eating X X X Bathroom 1 X X Office X X Kitchen X X Storage room X X X Bedroom X X Child 1 X X Child 2 X X Working X Bathroom X X In this relatively expansive installation each system is supplied by a mixed circuit, which has been set up specifically for this system. The limitation, e.g. use the floor in the living room only for heating, is set forth by the configuration. It is possible at any time to change the configuration so that the floor can also be used in the cooling mode Utilisation of several heating/cooling systems in one room The system allows the coordinated utilisation of several heating/cooling systems in one room. These systems can be supplied by one or various mixed circuits. 18

19 Example 2: Floor heating/cooling and ceiling heating/cooling in a building, 1 mixed circuit In this example, the same systems as well as the same allocation are used as in the previous example. However, in contrast to the previous example, there is only 1 mixed circuit that is defined for floor heating and ceiling heating: 3.11 Monitoring of the temperature of heated and cooled surfaces For comfort reasons it is desired in some cases to maintain a minimum value, e.g. the floor temperature of a bathroom. For that, probes can either be installed in the component itself or in the return loop of a circuit. In this case, the applicable limit values will be queried during the configuration: Fig. 3-2 Mixed circuit floor heating and ceiling heating Fig. 3-3 Definition of the floor temperature limit values This means that all application scenarios color-coded below, the flow temperature in the cooling scenario is rather low but rather high in the heating scenario. Floor Ceiling H C H C Residential X X Eating X X X Bathroom 1 X X Office X X Kitchen X X Storage room X X X Bedroom X X Child 1 X X Child 2 X X Working X Bathroom X X In order to compensate for the therefore existing oversupply of the color-coded systems, the opening time of the valves on the manifold is reduced automatically. In order to maintain the temperature of the systems effectively within a desired range, additional probes can be used in the structure of the system or in the return loop of the circuits. Refer to the following section Possible measuring methods The following probes can be defined for the temperature monitoring: Element temperature probe The probes are located in the heated/cooled elements; the temperature that is to be monitored is measured directly. --The limit values that need to be indicated refer to the component temperature. Return loop/element temperature probe The probe is located in the return loop and therefore measures the temperature in the element indirectly. The component temperature is interpolated based on the measured temperature. --The limit values that need to be indicated refer to the component temperature. Return loop probe The probe is located in the return loop and should only be used for the monitoring of the return temperature. --The limit values that need to be indicated refer to the return temperature Function in the heating scenario - maximum temperature reached As soon as the defined limit temperature has been reached, the heating of this area is disrupted and blocked for the upcoming cycle of the room temperature regulation (also refer to Chapter 3.7) Function in the heating scenario - minimum temperature not reached This situation will occur in particular when the room temperature is sufficient and the heating is therefore inactive for a longer period of time. In this scenario - if the measurement or determination of the component temperature indicates a value that is too low - the circuit(s) are opened for half of the cycle time of the room temperature regulation. 19

20 Function in the cooling scenario - minimum temperature reached Since the acceptable tolerance range of the component temperature is very low in the cooling scenario, 2 mechanisms become active: --The component temperature approaches the limit value: --The flow temperature is slightly increased --The opening time of the valves is set to the minimum value --The component temperature reaches or falls below the limit value: --Valves are closed 3.12 Control via digital signals The following functions can be controlled via the digital inputs: --Control functions --Demand signals --Alarms --Status displays This also applies for: --HC BUS manager (as master or slave) --HC BUS manager extension (as V module or FT module) Note: For the HC BUS manager, analogue inputs can partially also be used as digital inputs. The connection options are listed in the tables in the appendix. The differences between local or global impact of demand signals need to be taken into account! Below, the system components are listed by their function (master, slave, V module, FT module) Comfort level control Standby Usable on: Master, slave Impact: Entire system switches to standby mode Cooling mode is blocked, only frost protection is active in heating mode. Normal mode/reduced operation Usable on: Master, slave, FT module Impact on master, slave: Entire system switches independently from time program to normal mode or reduced mode. Impact on FT module: The affected mixed circuit as well as all respectively supplied rooms switch independently from time programs to normal mode or reduced mode. Absence Available at: Master, slave Impact: For the probe function, the system switches to the reduced mode until the next switching point of the time programs. For a permanent signal, the system remains in reduced mode independent from the time programs. When the windows are open (see Chapter ) an alarm message is triggered in both scenarios Summer/ winter mode Available at: Master, slave Impact: If the input "Summer" is activated, the system switches to the operating mode "Only cooling". In this scenario, the user can only select the operating modes "Standby" and "Manual cooling". If the input "Winter" is activated, the system switches to the operating mode "Only heating". In this scenario, the user can only select the operating modes "Standby" and "Manual heating". If the inputs are not activated or none of the inputs are set, the system is in automatic mode Demand signals Pump mixed circuit Available at: Master, slave, FT module Impact: The mixed circuit that is supplied by the affected unit is started. The signal overwrites the integrated logic of the system to demand the mixed circuits. Radiator pump Available at: Master, slave Impact: The pump that is connected to the likewise configurable output "Radiator pump" is started if the system is not in cooling mode Universal alarm Available at: All modules Impact: The outputs that are definable as universal alarm 1-20 generate an error message with the text "Universal alarm #x". In addition, the configurable relay output "Alarm" is set on the master or slave module. The alarm is triggered when the contact that is connected on the digital input is opened. 20

21 Window contact The window contact (opener) signals that a window was opened in a specific area. Available for: Master, slave, V module Impact: 1. General When the "Absence" function is activated (see Section ), an alarm message is triggered 2. Neutral operating mode (neither heating nor cooling) see Heating mode After a time period, which depending on the current outside temperature can be between 5 min (colder than -5 C) and 15 min (at least 10 C), an alarm message is issued. In addition, the heating output for all affected rooms*) is reduced for the duration of the opening time. See also below. 4. Cooling mode The cooling mode is stopped after 2 minutes in all affected*) rooms. *) affected rooms: The rooms affected by the above listed measures are: --For a connection of the signal "Window contact" on the master/slave: All rooms that are managed via the master/slave --For a connection of the signal "Window contact" on a V module: All rooms that are supplied via this V-module With low outside temperatures, an opened window is recognized via the occurring temperature decrease. In this case, the heat output is reduced for a certain time. This function prevents excessive heating during short-term ventilation which would cause the room to overheat after the window is closed. However, a permanent reduction of the heat output is not put in place by this function Concrete core temperature control (BKT, TABS) The thermal activation of the building structure can be the exclusive or a supplementary system to heat or cool a building. For that, the structure of the building must be maintained at a temperature level depending on the ambient conditions. An individual room temperature regulation is not possible due to the extreme inertia of the thermal masses Basic information about the function The following basic principles remain the same: --Activation of the operating modes heating and cooling --Time control --Flow temperature regulation in heating/cooling mode Probe or HC BUS room units that are installed in different rooms but are not used for the function "Individual room regulation". They impact the flow temperature in the sense of pilot room probes; the calculated dew points are used in a cooling scenario to limit the flow temperature. However, the essential point is a possible monitoring of the building structure temperatures that is as precise as possible. For that, the options that are also in place with other systems can be used, e.g. temperature probes in the building structure itself or in the return loop of heating circuits Heating mode Basic value flow temperature: The flow temperature is guided by a heating curve with a minor slope - as a standard 0.25 ( P). The maximum limitation of the flow temperature in the design scenario is set to 30 C as a standard ( P). Heating Heating circuit #n P HKn "Slope of heating curve (normal mode) Heating Heating circuit #n P HKn "Maximum flow temperature in heating mode (normal mode) 21

22 Impact of the pilot rooms: Since due to the high inertia of the system, no room temperature regulation in the actual sense is possible, the information of the divine departments is used to correct the calculated base value of the flow temperature ( P). During the configuration of these room units or probes, the allocation of the probes does not take place on a manifold but directly on the mixed circuit. Heating Heating circuit #n P HEn room temperature compensation factor In addition, just like for the other systems there is an impact of the pilot rooms on the activation of the heating mode. (see Chapter 3.3.1) Building structure temperatures: The setpoint for the building structure temperature is derived through a calculation based on the set flow value of the heating curve and is thereby gradually adjusted to the heating requirement. The building structure temperatures can be measured directly or indirectly via the return temperature. If the setpoint of the monitored area is exceeded (or not met in a cooling scenario), this area can be temporarily switched off by a zone valve Function heating in accordance with EN 1264 The function heating is used to check the floor structure. For that purpose, the selected area is heated in 2 phases: Phase 1: Heating with 25 C flow temperature for 3 days Phase 2: Heating with temperature rating (e.g. 45 C corresponds with parameter HI#n, maximum flow temperature heating mode, normal) for an additional 4 days. During the function heating, all valves on the heating circuit manifolds that belong to the activated mixed circuits are opened. Activation of function heating This function is located in the service area under the menu item "Parameter" Access: Basic monitor Main menu Service Parameter Function heating Cooling mode Basic value flow temperature: The minimum value of the flow temperature for normal mode and reduced operation can be set individually for each circuit via the parameterisation. Cooling Cooling circuit #n P CAn "Minimum value flow temperature cooling (normal)" and Fig. 3-4 Function heating Cooling Cooling circuit #n P CEn Increase cooling flow temp. in reduced mode Impact of room humidity (dew point): The defined room units (see Chapter ) provide temperature and relative humidity. The dew point temperatures are calculated based on that. The lowest permitted flow temperature is derived from the highest determined dew point temperature plus a safety margin ( P). Cooling Cooling circuit #n P CBn "Flow temp: safety distance to dew point" The function is started and stopped by at the PRG key. The screen shows: -- Circuit number -- Running phase -- Remaining time in the running phase -- Setpoint and actual value of the flow temperature Function heating can be started time-independent for all configured circuits. Use the arrow keys to scroll between the circuit illustrations. Building structure temperatures: Analogously to the heating scenario, the building structure temperatures can be measured directly or indirectly via the return temperature. If the set limit value is not reached, this area can be temporarily switched off by a zone valve. 22

23 3.15 Interfaces to central building control systems Essential system conditions and parameters are available via interfaces to the central building control systems. The interfaces are realized through the utilisation of an additional card for the slot "Serial card 1". The following interfaces can be used: --LonWorks (Loncard) --Konnex / EIB (KNX/EIB card) --BACnet / Ethernet (web card) It is not possible to operate more than one interface card. This also applies for the web card described in the next section. Additional information can be found on the Internet under Fig. 3-5 Webpage "Operating type and room temperatures" 3.16 Use of a web card The web card allows a simple and comfortable operation and monitoring of the system via PC or smart phone - onsite or remotely. Of course, the access to the system is password-protected Internet access Within the WWW, web card is given a changing address like any other member. A service such as DynDNS must be used to access the web card via the fixed domain name System access within the building The web card can be directly connected with the network input of the PC via a network cable. However, it is more common to connect the web card with the router. The default settings of the cards allow the standard DHCP functions of the routers. After determining the IP address issued for the web card by the router, the web card can be accessed with a web browser such as Internet Explorer or Firefox Overview of functions Almost all functions that are possible via the integrated keyboard of the system can be operated via the web card. In addition, the web card offers a clearly structured visualisation of the system status and a comfortable user interface for the user. Through the remote access option, the user can monitor and control the system remotely via an Internet enabled PC or via a smart phone. The service company has the option to carry out remote diagnostics. Many on-site appointments can be avoided through the setting options. 23

24 Overview pages The start screen illustrates all essential information at one glance - operating status of the system, outside temperature, set and actual values of the rooms. Up to 50 rooms can be combined into areas and can thereby be illustrated as groups. At this level, the operating type of the system can be specified and the set values for the room temperatures can be changed Setting options for the user All setting options that are possible in the user menu of the system are also available via the PC: --Definition of time programs --Editing of adjustable values for heating limit, flow temperature, dehumidification --Allocation of the rooms to weekly switch programs --Specification of room temperature setpoint values Fig. 3-6 Webpage "Parameterisation" Monitoring and alarm functions Current or system-stored error messages can be illustrated via the web card. In addition, digital signals that can be connected to the system (window contacts, universal alarms) can be illustrated via the web card including additional texts Service functions for the specialist The specialist has the option to easily and clearly view all functions of the system. This remote diagnosis allows service visits to be perfectly prepared or even averted entirely. By correcting the parameters that are accessible in the service area, the operation of the system can be optimized in accordance with the customer's demands. In addition to the alarm history, additional diagnosis pages of the web card provide information about recorded data of important system parameters such as flow temperature, room temperature, and humidity. Additional information about the web card can be found on the Internet under 24

25 3.17 System behaviour during malfunction In addition to the triggering of an error message, malfunctions on probes or the bus communication line that occurred during the operation lead to measures that allow minimum operation and that are designed to prevent damage to the building. Occurred error Response of the system Comment Outside temperature probe defective Outside of heating cycle: No heating operation necessary No response other than error message Flow temperature probe defective During heating cycle: System behaves as if an outside temperature of 0 C is present Mixing valve actuator activated with 10 % (only in heating mode) Satisfying operation of the system within an outside temperature range of about +10 C to -5 C Frost protection guaranteed Return temperature probe defective Start-up circuitry is blocked Heat-up optimisation not applicable Connection error to HC BUS room unit 80 % of the previous signal for the control of the manifold valves is maintained (only for heating mode) The heating circuits are continued to be operated with a fixed flow rate value which ensures frost protection. Room temperature will deviate from the setpoint. Connection error to HC BUS manager extension - V module Connection error to HC BUS manager extension - FT module Flow temperature in heating mode exceeds calculated setpoint by more than 5 K for at least 10 minutes Low-temperature and heating mode exceeds maximum value permanently Flow temperature in cooling mode falls below calculated setpoint by more than 2 K for at least 10 minutes In case of a communication failure with the previous heating mode, the outputs for the valves are set by the module itself. In case of a heating scenario, the valves are opened, with prior cooling mode, the valves are closed. The mixed circuit continues to run unregulated with low opening of the mixing valves (only for heating mode). Only error message Operation of the next circuit is disrupted for 1 h Operation of the next circuit is disrupted for 1 h The heating circuits are continued to be operated which ensures frost protection; overheating can occur. Over/under supply will occur in heating scenario, frost protection is ensured. Oversupply will occur Over/under supply will occur, frost protection is ensured. Undersupply will occur. 25

26 4 PLANNING INFORMATION Please note: High level of flexibility is possible due to the modular structure of the system. The bus technology also enables the installation of components at all locations featuring a bus cable (and potentially a connection for the power supply). These characteristics result in a certain tolerance towards inaccuracies in the preplanning phase. The exact preplanning of the cable routing for the bus cable and potentially additional probe lines as well as the adherence of the system limitations must nevertheless be followed under all circumstances. 4.1 Selection of components Determination of the desired functions Considering the limitations of the system, the quantity must be determined for: --the rooms that are to be regulated --the desired flow temperatures --the dehumidifiers that are to be controlled --the fan coils Calculating the number of required outputs, and determining the respectively required modules In total, a quantity of 15 V/FT modules is available for each segment of the system (controlled by an HC BUS manager or an HC BUS manager (slave)). The 15 modules provide 60 switch outputs. The table below indicates how many outputs are "used up" for the existing functions. Example: --10 rooms --4 dehumidifiers --2 fan coils --2 flow temperatures (total, the first is regulated by the master) Number of outputs = 10 x 1 [rooms] + 4 x 2 [dehumidifiers] + 2 x 1 [fan coils] = = 20 outputs 20 outputs can be realized (theoretically) by 5 modules. Add to that 1 module for the regulation of the second flow temperature Function Number of used outputs Comment Room temperature 1 Is required for each system that is to be controlled (e.g. floor heating and ceiling cooling) *) Flow temperature None for the first flow temperature, 4 for each additional The first flow temperature can be regulated by the HC BUS manager / slave. The additional maximal 4 are regulated via FT modules Dehumidifiers 2 The two outputs must be located on a module Fan coils 1 *) If the supply of a room takes place via more than one system, it is necessary to plan an output for each system. If the same system is supplied by more than one manifold (e.g. in larger rooms) it is sensible to plan a V module for each manifold. 26

27 4.1.3 Planning of installation locations, new calculation of the number of modules In this case it must be taken into consideration at which location the modules are required. In reality it may happen that not all outputs of the modules can be used. In this case, the list must be created based on the design drawings for the system hydraulics, which documents the allocation of room-manifold as well as dehumidifier-manifold. In order to take advantage of the bus technology wiring, it is sensible to install the modules directly to the manifolds. You also should start with a new V module for an additional manifold, unless it is possible without much hassle to install a connecting line. In addition, it must be ensured that the control of dehumidifiers (2 outputs) must not take place beyond the module limit (both outputs on one module). The table below shows the system example of the previous section (10 rooms, 2 flow temperatures, 4 dehumidifiers, 2 fan coils). The module with address 1 is used as a FT module for the second flow temperature. Room / dehumidifier / fan coil Manifold number Module address / channel Room / NO1 Room / NO2 Room / NO3 Dehumidifiers 1 3 / NO1 + NO2 Fan coil 1-3 / NO3 Room / NO1 Room / NO2 Dehumidifier / NO3 + NO4 Room / NO1 Fan coil 2-5 / NO2 Room / NO1 Room / NO2 Dehumidifier / NO3 + NO4 Room / NO1 Room / NO2 Dehumidifier / NO3 + NO4 This example shows that the outputs NO4 of module 2, NO4 of module 3 as well as NO3 and NO4 of module 5 cannot be used. Therefore, for the realisation you require 7 modules compared to the 6 modules calculated in the previous section 27

28 4.2 Planning of circuit design The following needs to be taken into consideration for the circuit design: --Country-specific regulations --Applicable engineering rules --Averting of interferences on probe lines --Maximum cable length with respect to loss of voltage and induced malfunctions --Termination of the bus lines with lengths of over 100 m --Maximum bus line length 500 m --Adherence to linear bus structure (no junctions, no ring structure) Used lines All indicated line types are recommendations. The suitability of the line with respect to usability in a particular environment needs to be checked under all circumstances! Number From device To device Line type Comment 1 HC BUS manager HC room terminal, V module, FT module (field bus) IY(St)Y 4 x 2 x 0.8 mm Bus line, twisted pair, shielded. 2 line pairs can be used for the power supply of the HC room terminals 2 HC room terminal, V module, FT module 3 HC BUS manager, V module, FT module 4 HC BUS manager, V module, FT module 5 HC BUS manager FT module 6 HC BUS manager, V module, FT module HC room terminal, V module, FT module (field bus) Temperature probe / humidity temperature probe 2-point valve actuators 24V 7 HC BUS manager HC BUS manager (slave) (master/slave bus) IY(St)Y 4 x 2 x 0.8 mm 2 x 0.75 mm², shielded / 4 x 0.75 mm², shielded or IY(St)Y 2 x 2 x 0.8 mm 2 x 0.75 mm² or stronger cross-section Bus line connects all linear devices Installed probe lines in sufficient distance to electric cables. Select larger cross-section starting at cable length of 50 m. Pay attention to line length and current consumption! REHAU valve actuators feature a connecting cable 24V mixing valve actuators 3 x 1.5 mm² Pay attention to line length and current consumption! 230V consumer such as 3 x 1.5 mm² Pay attention to power consumption pumps, etc. IY(St)Y 2 x 2 x 0.8 mm Bus line, twisted pair, shielded 28

29 4.2.2 Circuit diagram system overview Outside temperature probe T 2 HC BUS Manager Flow/return temperature probe T 2 2 T 3 Mixing valve actuator M 1 4 Pump of heating/ cooling circuit T Return temperature probe 2 2 FT-mod. V-mod. V-mod. 2 T Floor temperature probe T Flow/return temperature probe T 3 4 Mixing valve actuator M Pump of heating/ cooling circuit 1 2 Fieldbus- and power supply line for HC Room Units, V/FT-moduls: IY (St) Y 4x2x0,8 mm Sensor cable: 2x0,75mm², shielded 3 Power supply and control line for mixing valve actuators: 3x1,5 mm² 4 Control line for consumers as pumps: 3x1,5mm² Fig. 4-1 Circuit diagram system overview 29

30 4.2.3 Circuit diagram bus system HC Room Unit HC Room Unit 230 VAC 24 VAC J1 J2 J3 SYNC G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 plan -RX/TX +RX/TX -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 24V -RX/TX +RX/TX 24V -RX/TX +RX/TX 24V -RX/TX +RX/TX J1 J3 J5 J8 J9 J10 J11 J12 J4 HC BUS Manager 230 VAC 24 VAC HC Room Unit 24V -RX/TX +RX/TX 24V -RX/TX +RX/TX J1 J3 2. level Connection of supply and communication lines for HC Room Unit and V-modules and FT-modules Fig. 4-2 Circuit diagram bus system 30

31 4.2.4 Circuit diagram HC BUS manager / HC BUS manager (slave) 24 VAC PWR 0..10V L N 800 ma T Wiring diagram HC BUS Manager (example) heater demand chiller demand M actuator mixing valve Ret.- temp. probe. pump mixed circuit valve position cooling valve position heating power supply switching valve J1 SYNC Outside- temp.- probe Flowtemp. probe floor temp. probe N L M G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 Field bus system HC Room Unts J4 J8 J9 J10 J11 J12 HC BUS Manager J2 J3 plan -RX/TX +RX/TX J5 230V/ 24VAC 2nd level Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independent to the control system! This switches off the pump when high temperature occurs. Definition HC BUS Manager Outputs: NO1/NC1: Switching valves heating/cooling NO2: Pump mixed circuit NO3: Demand signal heating NO4: Demand signal cooling NO5: Switching valves cooling (cooling mode) Fig. 4-3 Circuit diagram HC BUS manager 31

32 4.2.5 Circuit diagram HC BUS manager extension as V module J1 J1 J3 G G0 VG VG0 Y1 T+ T- ID1 ID2 ID3 ID4 IDC1 NO1 C1 NC1 NO2 C2 NC2 NO3 C3 NC3 NO4 C4 NC4 B1 B2 +5VRef +Vdc B3 B4 +5VRef +Vdc L N 24VAC valve actuators 230V/ 24VAC 230V/ 24VAC V-module wiring scheme 800 ma T number of actuators is optional note maximal switching capacity! M M M M M M M J5 J6 J7 J8 J9 J10 V-module RS485 J3 Serial Adress digital signals (optional) RS485 communication line probe 1 probe 2 probe 3 probe 4 number of probes is optional bl rd ye gn bn bus line I-Y(ST)Y 4x2x 0,8 Fig. 4-4 Circuit diagram HC BUS manager extension as V module 32

33 4.2.6 Circuit diagram HC BUS manager extension as FT module J1 J1 J3 G G0 VG VG0 Y1 T+ T- ID1 ID2 ID3 ID4 IDC1 RS485 Serial Adress NO1 C1 NC1 NO2 C2 NC2 NO3 C3 NC3 NO4 C4 NC4 B1 B2 +5VRef +Vdc B3 B4 +5VRef +Vdc L N 230V/ 24VAC 800 ma T N L J5 J6 J7 J8 J9 J10 J3 PWR 0..10V Wiring diagram FT-module pump mixed circuit FT-module RS485 communication line Actuator mixing valve M flow temp. bl rd Bus cable I-Y(ST)Y 4x2x 0,8 (twisted pair) ye gr br Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independent to the control system! This switches off the pump when high temperature occurs. digital inputs (optional) return temp. Fig. 4-5 Circuit diagram HC BUS manager extension as FT module 33

34 4.2.7 Circuit diagram bus termination Field bus system V- module V- module V- module V- module T+ T- 120 Ohm 120 Ohm Master/Slave bus system +RX/TX -RX/TX +RX/TX 120 Ohm -RX/TX 120 Ohm +RX/TX -RX/TX Master, address 1 Slave, address 2 Slave, address 3 Slave, address X The bus must be terminated by 120 Ohm, ¼ Watt resistors. The resistors are inserted at the first and the last member in the bus line. The resistors are inserted between and + of TX/RX. The bus termination must be done when the length of the bus cable exceeds 100 m. This is valid for the field bus and for the Master/Slave bus Fig. 4-6 Circuit diagram bus termination 34

35 5 INSTALLING COMPONENTS 5.1 Basic information about installation The installation, start-up and maintenance of all components of the control system must only be carried out by trained personnel with sufficient qualifications. During the installation of the components, the local applicable regulations as well as the information enclosed with the products need to be adhered to HC BUS manager Can be assembled on DIN track in accordance with DIN and IEC EN For installation in a small manifold with transparent flip window, the HC BUS manager can be operated without risks and without using the tool utilizing the integrated display. An installation location close to the first mixed circuit is recommended. The installation of the components must take place while the operating voltage is switched off. After completing all connections, check the wiring before you switch on the operating voltage. 5.2 Installation of regulation components When selecting the installation location of the regulation components it must always be ensured that the applicable regulations for electrical installations are adhered to. For safety reasons, electrical operating equipment must be protected against external impacts. The used housings must be suitable to protect the devices against touch, the penetration of solid foreign objects as well as dust, moisture, and water Ambient conditions that must be adhered to The following applies for the HC BUS manager and HC BUS manager extension components: --Assembly in a suitable housing for electrical components. --Installation with suitable ambient conditions. Unsuitable ambient conditions: --Relative humidity above 90 % --Temperatures above 60 C or below -10 C --Vibrations or shocks --Water --Oxidizing or caustic gases --Explosive or flammable gases --Strong magnetic or electrical fields --Strong and rapid temperature fluctuations --Dust HC BUS manager extension V module: The HC BUS manager extension used as a V module should be installed with the hydraulic manifold. This minimizes the wiring effort (control of the valve actuators on the manifold). FT module: When used as an FT module, the installation can either take place together with the HC BUS manager In the same housing, if the circuit that is to be controlled is located in a different part of the building, in a separate housing. In this case the housing with transparent flip cover is not necessary, because no direct operation will take place on the FT module HC BUS room unit The HC BUS room unit is installed in the rooms that are to be regulated. In order to achieve an uncompromised measuring of the actual room temperature and humidity, the room unit must not be exposed to any interfering impacts. For that reason, adhere to the following: --Assembly at a height of about 1.5 m --Not at locations subject to direct sun radiation --Not in draft areas, behind curtains or in close proximity to heat sources --Not an outside walls The assembly takes place in a concealed electrical box with minimum diameter of 65 mm, depth at least 31 mm and screw distance of 60 mm. The device must not be subject to any damaging impacts such as listed in Chapter

36 5.2.5 Room temperature probe RT-HC The same specifications apply for the selection of the installation location as for the HC BUS room unit. The assembly of the probes can also take place directly on the wall Bus shielding The shield of the bus lines must be connected continuously and connected with the protective earths (PE). The connection to the protective earth PE must be established at several locations. This applies for the master/slave bus as well as for the field bus. See respectively Fig Bus termination In case the length of the bus system exceeds 100 m - this applies for the master/slave bus as well as for the field bus - a resistance with 120 Ohm, 1/4 Watts needs to be used on the first and the last connection of the bus line. See circuit diagram in Chapter Fig. 5-1 Bus lines, shielding and grounding 36

37 6 SYSTEM START-UP 6.1 General procedure A Rendering the line ready for operation --Check wiring --Switch on operating voltage of the regulation components --Set plan addresses for installations with more than one manager (see Chapter 6.2.1) --Set fieldbus addresses (room units, V modules, FT modules) (see Sections and 6.3.2) The communication via the bus can only take place after correct setting up all the vice addresses. Configure system by segment via configuration wizard: B Pre-configuration --Language, date --System type, schema --Number of mixed circuits, manifolds, dehumidifiers... --Check master/slave bus --Check field bus: --Search for extension module --Define as V / FT module --Search for room units At the end of this section, it is ensured that it is possible to communicate with all devices connected to the bus systems master/slave bus and fieldbus. 6.2 Systems with slave units If, in addition to the HC BUS manager with address 1 (master), one or multiple additional HC BUS managers with addresses 2 and following (slave) are used, the first step must be to set the addresses of the slave units (plan addresses). The address of the HC BUS manager that is used as a master remains unchanged plan address Address setting of the HC BUS manager (plan address) The device addresses of the state units are allocated in an ascending order from 2 to 9. Address setting: --Pull operating voltage plug J1 --Separate bus connection by pulling plug connection J5 --Press and hold keys [Alarm] and --Set up operating voltage by inserting connector J1 --This is followed by the 30 sec loading process, indicated with the text "Loading...". During this time the signal of the display is audible in irregular intervals --The screen for the address setting appears after the loading process: The basic structure of the system is defined. C Configuring manager (master and slave) --Configure and check analogue/digital inputs --Configure and check analogue output/relay outputs The first next circuit is ready for operation D Allocate devices --Room unit Allocation to manifold, dehumidifier, used heating/cooling system and switch unit (V module) --Dehumidifier, fan coils E Define rooms --Specification of pilot rooms --Allocation to time zone --Release heating/cooling operating type --Naming F Configuring FT modules Additional mixed heating circuits are configured and checked Fig. 6-1 Address setting HC BUS master --Set address with arrow keys and confirm with ENTER The process is carried out for all slave units. The connectors J5 for the master/slave bus system are only inserted during the configuration section B after all addresses have been set up. Adhere to the information in the "Manual master/slave bus system" on the enclosed DVD. G Configuring V modules --Additional probes and digital signals --Test relay outputs H Heating/cooling test All used next heating circuits are tested for their functionality. I System-specific settings Defining or changing the predefined time programs, building-specific settings 37

38 6.3 Preparation of the fieldbus system for the HC BUS managers The following describes the configuration of the fieldbus system, which is subordinate to an HC BUS manager Address setting for HC BUS manager extension The addresses set up via the dip switch: Address setting for HC BUS manager extension Address [value] 1 [1] Position switch (X = pushed down) 2 [2] 3 [4] 1 X 2 X 3 X X 4 X 5 X X 6 X X 7 X X X 8 X 9 X X 10 X X 11 X X X 12 X X 13 X X X 14 X X X 15 X X X X 4 [8] X = ON (position down). The address setting is based on the binary number principle. The desired address is derived by adding up the numbers indicated at [value] for the switches that are pushed down: Examples: 13 = ; 6 = Address setting HC BUS room unit Fig. 6-2 Address setting for HC BUS manager extension Address range: 1 15 Please note: The address is derived from the following table. After switching on the operating power and after a brief test of all icons, the display shows the installed software version of the device (e.g. u 1.3). Afterwards, the display shows Cn when the bus communication is not yet activated. The permissible address range for the HC BUS room unit is address 16 to address 65. Devices with addresses outside of this range are not recognized by the system! 38

39 Procedure to set address: 1. Open parameter level: Press + for 3 seconds 2. Enter code number: Use dial to set code 22 and confirmed by pushing the dial. 3. Select parameter "Address". The parameter Addr appears as the first parameter, individual parameters can be selected via the dial. Select parameter Addr by pressing the dial, Addr and the address blinking. 4. Set dress. Set address with dial and confirmed by pressing it. 5. Exit parameter level. Select menu item ESC via dial, confirm by pressing it. 6.4 Basic information for the operation of the control The control can be operated via the integrated operating unit or via the display D-HC that is available as an accessory. Possible actions are shown in the footer of the screen. In principle, the keys have the following significance: Confirmation of the entry or page forward 6.5 Configuration assistant (Wizard) The configuration wizard is automatically pulled up for a system that has not yet or not been completely configured. It ensures that all configurations that are necessary for the operation of the system will be carried out. The configuration assistant can be aborted at any time - even by switching off the controller - all past entries are stored. With a restart of the system, it is restarted with the previously carried out entries. In the configuration sequence it is possible to go backwards or forwards at any time. Entry pages that are exited with ESC are not fully configured. All entries must be confirmed with ENTER. The sequence of the configuration assistant is illustrated in the next sections. 6.6 Entry of basic data Language selection Increasing of the value or scroll backward Decreasing of the value or scroll forward ESC PRG Abort the entry or go next higher level Continue to next entry, call up special functions Pull up current or stored error messages Example: Screen from start-up sequence: Limit values floor temperature Fig. 6-4 Language selection Use the arrow keys to select the desired language and confirm with ENTER. Fig. 6-3 Setting limit values of the floor temperature Use the ENTER key to move the cursor to the value that is to be adjusted; the arrow keys are used to change the value. Confirmation and moving of the cursor with the ENTER key. If the cursor is in the selection field on the top left, you can use the arrow keys to go to the next ( ) all the previous screen ( ). 39

40 6.6.2 Date/time Slave module Fig. 6-5 Setting date and time Fig. 6-8 Query slave module Use the ENTER key to move the cursor to the value that is to be adjusted; adjust with the arrow keys. Confirm with the ENTER key and move the cursor along. Is the cursor is located in the selection field on the top left, the keys can be used to scroll to the next screen Building type The expansion by one or several HC BUS manager slave supports room numbers of more than 50 up to 500 rooms. Each HC BUS manager Is responsible for the control of one segment within the system Number of manifolds Fig. 6-6 Select building type The presetting of the time programs is controlled via the building type. For "Residential building" the utilisation of predefined schemas is possible. Fig. 6-9 Query of number of manifolds Enter number of heating/cooling circuit manifolds Number of mixed circuits Schema selection Fig Query of number of mixed circuits Fig. 6-7 Select schema Enter a number of mixed circuits Only appears for building type "Residential building". The predefined schemas can be found in the appendix. When selecting a predefined schema, the screen pages are skipped in the configuration or pulled up with predefined values. At least 1 mixture circuit must be present in the entire system. However, it is permissible that there is no individual mixed circuit in a system segment, which operates via an HC BUS manager operating as a slave. In this case, the next circuits of the master are applied. 40

41 6.6.8 Regulation mixed circuit Number of dehumidifiers Fig Query regulation unit for 1 mixed circuit Ordinarily, the control of the first next circuit is taken care of by the HC BUS manager. In exceptional cases, where the HC BUS manager has been installed at a greater distance to the components of the first mixed circuits, an HC BUS manager extension module can be used (as FT module). Fig Query of the number of dehumidifiers -- Enter number of dehumidifiers that are to be controlled Number of dew point monitors Used systems Fig Query of the number of dew point monitors Fig Query of used systems All used heating/cooling systems must be indicated here. -- Enter number of used dew point monitors. Up to 30 dew point monitors can be managed by the system in each segment. The entry is therefore limited to 30 in this case. The used systems (meaning e.g. floor heating and cooling and ceiling pulling) must not be identical to the used mixed circuits. In this case, a mixed circuit, that is configured for floor heating and ceiling cooling, can be used for the supply of the floor cooling and the ceiling cooling. 41

42 6.7 Test and definition of the bus environment Test of master/slave bus environment Fig Display of the found HC BUS manager extensions Found modules are illustrated as a icons with question mark. Fig Test of master/slave bus environment Here, the bus communication with the HC BUS manager slave as well as with existing D-HC displays can be tested. The icons, "Manager" and "Display D-HC" appear for the corresponding set addresses. The connectors J5 for the master/slave bus system are only inserted during the configuration section B after all addresses have been set up. Adhere to the information in the "Manual master/slave bus system" on the enclosed DVD Test of the bus environment for HC BUS manager extension module Communication test and definition of the function of the HC BUS manager extension module. The found modules must be illustrated permanently. It is therefore recommended to let the search process run across the address range (1-15) at least twice. As soon as all installed modules have been found, the search run will be terminated by pressing the PRG key again. Selection of the function for the HC BUS manager extension module Fig Test of the field bus environment Procedure: Initially, the screen does not show any modules. Use PRG to search for the installed modules. During the search run, the currently checked address is continuously shown on the lower right. Fig Specification of the function for the HC BUS manager extensions V module: Utilisation of the modules to switch the valves on the manifolds as well as to control dehumidifiers and fan coils FT module Utilisation of the modules to control a mixed circuit Procedure: Selection of the modules with the ENTER key, selection of the function with the arrow keys, proceed to the next module with ENTER. 42

43 6.7.3 Communication test of the HC BUS room units 6.8 Definition of the mixed circuits Setting up function Fig Communication test of the HC BUS room units Procedure: Initially, the screen does not show any HC BUS room units. Use PRG to search for the installed devices. During the search run, the currently checked address is continuously shown on the left to the centre. Found modules are illustrated as an icon. Fig Selection of the function of the mixed circuits As a selection, the screen indicates the sum of the systems defined in Chapter Procedure: Jumping to the desired selection box with the ENTER key, inserting or removing of the checkmark with the arrow keys, proceeding with ENTER. Adhere to the information in the "Manual master/slave bus system" on the enclosed DVD. Only one respective option can be selected for the system for heating or cooling. Information page about mixed circuits The found modules must be illustrated permanently. It is therefore recommended to let the search process run across the address range (16-65) at least twice. As soon as all installed modules have been found, the search run will be terminated by pressing the PRG key again. Fig Information page for the regulation of the mixed circuits Setting option, it is only indicated, which unit of the first and additional mixed circuits are regulated. 43

44 Allocation of the mixed circuits to manifolds Query of the function Fig Allocation of the mixed circuits to the manifolds The respectively connected mixed circuit is selected for each manifold. For the operating modes heating and cooling, the respectively associated configuration is indicated. Allocation of the dehumidifiers to manifolds Fig Query of the functioning of the fan coils For each of the defined fan coils it can be defined whether it can be activated in the heating mode or in the cooling mode or in both operating modes Release automatic mode The automatic switch between heating mode" remote can be released here. In automatic mode is only possible in systems where the supply of the mixed circuits can be switched between heating water and cooling water via HC BUS manager-controlled reverse valves. This entry is followed by the information that the pre-configuration has been completed: Fig Allocation of the dehumidifiers to the manifolds Each dehumidifier is assigned to a manifold or directly to the cooling device. This allocation controls the supply of the dehumidifier with cooling water. 6.9 Definition of the fan coils Query of the number Fig Query automatic mode Fig Query of the number of planned coils Indicate number of installed fan coils 44

45 6.11 Configuration of the in/outputs of the HC BUS managers General information about the configuration process Analogue inputs Example page analogue input: The in/outputs of the HC BUS manager are illustrated, configured and released in the following sequence of subsequent screens. 1. Analogue inputs 2. Analogue output 3. Digital inputs 4. Digital (relay) outputs Certain in/outputs are already specified in the presetting, however, some presettings can be reconfigured. New functions can be added. In this context, adhere to the information included in Chapter 10 on page 86 about the standard as well as the optional allocation of in and outputs. In particular, adhere to the mandatory necessary signals! Use the key to proceed to the next screen when all entries have been completed in one screen or if the cursor is positioned in the field on the top left. This automatically deletes all activated test signals. You can go back via the key. All used in/and outputs must be carefully checked! --Check all displaced probe values, correct minor deviations via the offset function --Test the impact of all outputs, the analogue output for the mixing valve actuator as well as the relay outputs, call up the devices or switch the valves. The time required for this process is well spent, because: --Defective measurements can lead to malfunctions and an increased energy consumption! --Defective connected or defective. For units can be immediately recognized in this step In/outputs will only become effective when they have been released! Fig Configuration analogue input Legend: B01: Input channel Outside temperature: Designation : Input type 1) Off: Offset (manipulation value with probe correction) Value: Measured value *1) only the signal types available at the respective inputs will be displayed. For that see table in Permissible signal types on page 88 The inputs have been pre-assigned by default: B01 Outside temperature probe B04 Flow temperature probe B07 Return temperature probe B08 Element temperature probe Analogue output Only the analogue output Y2 is used to the control of the mixing valve actuator. Fig Release analogue output For test purposes the actuator of the mixing valve can be controlled in the field "Value". 45

46 Digital inputs Example page digital input: 6.12 Allocation of the HC BUS room units General This section specifies the supply of the rooms via the manifolds (or in special cases directly through a mixed circuit) as well as the dehumidifiers. The HC BUS room units are allocated: --to the corresponding manifold or the mixed circuit --to the corresponding dehumidifier --to the outputs of the manager extensions used as V modules Fig Configuration digital input The logic state of the input is indicated in the field "Value" (Yes/No) Digital outputs Example page digital output: In the following cases, this allocation can be multiple times: --Room is supplied by more than one system (e.g. floor heating and ceiling cooling) --More than one manifold is used for the supply of the room --In general, more than one switch outlet is required to control the supply of the room In these cases, the second or third configuration is set up for the HC BUS room unit. Fig Configuration digital output When using the test function, keep in mind that devices without additional monitoring is switched on through the controller. Also make sure that the operation of these devices does not cause any damage on the devices themselves or on the entire system! 46

47 Operating the configuration side Fig Contents of the configuration side The following information is entered or displayed in the step: [1] Address of the HC BUS room unit [2] Configuration number / number of configurations [3] Allocated dehumidifier [4] Used manifold or zone valve for mixed circuit [5] Address of the used HC BUS manager extension (configured as V module) [6] Used output channel of the V module [7] Used heating/cooling system The configuration in the section is significantly easier if you use an MS Excel table as it is included in the enclosed DVD. This MS Excel table should already be used to during the system design. With the help of the data sort function you can quickly and easily generate hardcopies which can be useful for the configuration and the testing of the system. Operating the configuration side If the cursor is located on the top left corner, you can scroll with the arrow keys backwards ( ) and forwards ( ) in the already existing configurations. Within the screen, the cursor is moved via the ENTER key, input values are increased ( ) or reduced ( ) via the arrow keys. When a configuration has been completed, the next configuration is prepared via the PRG key. For that, the address of the next existing HC BUS room unit is selected automatically. If an additional version of the configuration is now to be entered - meaning the connection to an additional V module needs to be defined - the back key ( ) must be used to select the address of the previously configured HC BUS room unit. Then it will be automatically indicated that the next configuration of this device is being processed. It is recommended to check the inputs of the step. Unintentionally entered configurations can be deleted, by selecting the option "Delete entry" on the last line [7]. Unintentionally entered configurations can be removed by selecting "Delete" in line [7]. 47

48 Example configuration A, respectively only 1 system in a room The following configuration applies in this example: There are 6 rooms that are regulated via the HC BUS room units 20 to 25. All rooms are connected to one manifold. The V modules with the address 1 and 2 are installed in the manifold box. All rooms except the room with the device address 24 are operated with floor heating/cooling, that room only with floor heating (e.g. bathroom). Device address System V module Address V module output 20 FBH/FBK 1 NO1 21 FBH/FBK 1 NO2 22 FBH/FBK 1 NO3 23 FBH/FBK 1 NO4 24 FBH 2 NO1 25 FBH/FBK 2 NO2 Fig Completed configuration HC BUS room unit 20 The configuration of the room unit 20 is thereby completed. PRG is used to prepare the next configuration. Fig Tab. 6-1 When you get to the configuration of the HC BUS room units after the configuration of the HC BUS manager, the first screen page with the room unit with the lowest found address appears (in this case 20): Fig Start configuration HC BUS room unit 21 The same process is repeated. After entering V module address, the next free output of the V module is suggested automatically: Fig Start configuration HC BUS room unit 20 The allocations to the used module in the system are entered. Upon confirmation of the system in the last line, the cursor jumps to the top left. Fig Suggestion of the V module output Upon complete entry of the configuration with PRG the next configuration is initiated again. The system "floor heating" is selected for the device with the address 24. Fig Configuration for floor heating 48

49 PRG is used to start the configuration of the last room unit: The example starts with the completed input for the room unit with the address 20: Fig Configuration HC BUS room unit 25 Upon completion of this last configuration, either use PRG to start the configuration of room temperature probes (optional) or use the key to continue to the next configuration section. Fig Completed configuration HC BUS room unit 20 The PRG key is used to pull up the next available room unit (with the address 21) for the configuration Example configuration B, 2 systems in a room The following configuration is entered in this example: [1] The HC BUS room unit with the address 21 is installed in a room with floor heating/cooling. The manifold outflow is connected to the HC BUS manager extension (V module) with the address 3 at the output with the address NO2. The[2] The HC BUS room unit with the address 22 is installed in a room with floor heating/ ceiling cooling. The manifold outflow of the floor heating is connected to the V module with the address 3 at the output NO3. [3] The manifold outflow of the ceiling cooling is connected to the V module with the address 5 at the output NO1. Fig Configuration HC BUS room unit 21 The input fields are pulled up and completed via the ENTER key. Room unit 21 Room unit 22 Floor heating/cooling [1] V module 3, output NO2 Floor heating [2] V module 3, output NO3 Ceiling cooling [3] V module 5, output NO1 The room unit 22 is also used for 2 different systems, which means 2 configurations must be entered. Fig Completed configuration HC BUS room unit 21 Now PRG is used to pull up the next configuration. 49

50 The system now selects the next possible room unit (address 22). Next, the entries are carried out as they are desired for the configuration 2 of the device with the address 22: Output NO1 on module with the address 5, system "Ceiling cooling" Fig Start first configuration HC BUS room unit 22 Now the first configuration for the system "Floor heating" is entered: Fig Selection of system ceiling cooling After that, the PRG key is used to select the next device that is to be configured. If a third configuration of the previous device needs to be entered, the previous addresses set again in the address field via the "Reduce" key Allocation of room temperature probes Fig Selection of system floor heating After that, the second configuration needs to be entered for the room unit 22. For this purpose, --use PRG to start a new configuration (for that the address 23 is prepared). --The previous device address items selected via the key on the position of the device address. Additional room temperature probes can be defined in addition to the HC BUS room units. As soon as the configuration of the last HC BUS room unit has been completed and the next configuration has been pulled up with PRG, the configuration screen appears for the allocation of the room temperature probes. Fig Configuration room temperature probe Fig nd configuration HC BUS room unit 22 Now, the configuration 2/2 appears automatically on the second line. The configuration takes place analogously to the procedure for the HC BUS room units. See also Chapter 6.10 If no (additional) room temperature probe is configured, the address field can be exited via the ESC key and the key can be used to proceed to the next configuration step. 50

51 6.14 Allocation of the dehumidifiers 6.17 Definition of the rooms In this section the HC BUS room units or room temperature probes that are installed in the rooms -- are linked with the fan coil (optional) -- associated with the time zone -- defined as a pilot room (optional) -- released for heating and/or cooling operation -- associated with room temperature setpoint values -- given a name Fig Allocation relay outputs for dehumidifiers 2 relay outputs of a V module are required for each dehumidifier. --Control of the dehumidifier itself --Control of the valve actuator for the hydraulic connection The same V module must be used for both relays Allocation of the fan coils Fig Definition of the rooms Operation The ENTER key is used to access all input fields, the input values are changed with the arrow keys Name assignment Fig Allocation relay output for the fan coil Start of name assignment: PRG Symbol selection: / Confirmation symbol: End of name assignment: Esc 1 relay output of the V module is required for each fan coil Allocation of the dew point monitor Fig Allocation of the dew point monitor to dehumidifier Each dew point monitor can be allocated to up to 10 dehumidifiers. 51

52 6.18 Configuration of the in/outputs of the HC BUS manager extensions General information The function of the HC BUS manager extensions was specified in the second configuration step - see Chapter 5.5. The modules are pulled up based on their ascending addresses, the function as FT module or V module is indicated during the process Configuration of FT modules Minimum configuration: Flow temperature Input B1 Mixing valve actuator Output Y1 Pump Output NO1 The minimum configuration stated above cannot be changed. The in/outputs of the HC BUS manager extensions are illustrated, configured and released in the sequence --Analogue inputs --Analogue output --Digital inputs --Digital (relay) outputs in subsequent screens. Certain in/outputs are already specified in the presetting, however, some presettings can be reconfigured. The relay outputs of the V modules are specified by the previous configuration step. New functions can be added. In this context, adhere to the information included in Chapter 10 on page 86 about the default as well as the optional allocation of in and outputs. In particular, adhere to the mandatory necessary signals! When all entries have been completed in one screen or if the cursor is positioned in the field on the top left, use the key to proceed or to go back to the next screen. This automatically deletes all activated test signals. You can always use the PRG key to go to the next already predefined input or output. If no assignments are to take place outside of the default, you can use PRG to move through all screens. Fig Configuration FT module At the cursor position [1] you can use the arrow keys to move forward ( ) or backward ( ). When you reach the last configuration page of the first FT module, you jump to the next FT module or to the first V module if no additional FT module exists. At the cursor position [2] you can move between the addresses of the FT module (not forwards to the V modules). PRG is always used to move to the next pre-assigned input/output. Fig Configuration return temperature probe The same procedure as described for the master module in Chapter on page 45 applies for the configuration of the analogue inputs. In addition to the by default required probes for the flow temperature probe, for the return temperature, the temperature of the heating/cooling system (e.g. floor temperature) or probes, which assume the combined function, can be selected for the analogue inputs. Only is used as an input type. 52

53 Function of additional probes Return temperature probe --The probe is installed in the return loop Configuration of the V modules The specified configuration of analogue inputs as well as relay outputs is derived from the configuration steps described in Chapter 5.9 and In heating mode: The measured value is compared with the desired value ( P) of the return temperature. If the measured value consistently falls below the setpoint, the flow temperature is increased for a parameterisable time ( P). The heating up of cooled heating surfaces is thereby accelerated (boost function). In cooling mode: The measured value is compared with the desired value ( P) of the return temperature. If the measured value falls below the setpoint, the flow temperature is increased. Element temperature --The probe is installed in the component Effect only in cooling mode: The measured value is compared with the desired minimum value ( P) of the element temperature. If the measured value falls below the setpoint, the flow temperature is increased. Return temperature probes/element temperature --The probe is installed in the return loop In heating mode: Effect as described for "Return temperature" In cooling mode: Since the probe is not installed in the element but in the return loop, the measured values corrected. The thereby corrected value is compared with the desired minimum value ( P) of the element temperature. If the setpoint is undercut, the flow temperature is increased. Analogue output Fig Configuration V module The operation is identical with the configuration of the FT modules. Analogue inputs The already pre-defined analogue inputs, assigned through room temperature probes, are indicated. Function of additional probes The options "Element temperature", "Return temperature/element temperature" as well as "Return temperature" are available. Element temperature --The probe is installed in the component Upon selection of this option, an associated relay output must be selected. 2 scenarios are to be distinguished: Case 1: Relay output already assigned through a valve on a manifold: A second input page appears where the limit values for the element temperature can be entered: The use of analogue output Y1 is mandatory for the actuation of the mixing unit. The output signal can be adjusted. Digital inputs The signals according to Chapter on page 89 are available. The signals "Demand signal pump", "Normal mode", "Reduced mode" refer exclusively to the circuit that is regulated through this module. Digital outputs Fig Limit value elements temperature Only the already pre-assigned relay output NO1 exists for the pump of the circuit. 53

54 Effect in the heating and cooling mode: It is attempted to maintain the measured temperature within the stated limits by reducing or increasing the flow rate. The measured value also impacts the flow temperature in the cooling mode in order to avoid excessive cooling of the services. Case 2: Only for systems with BKT: Relay output not assigned through a valve on a manifold: Upon selection of an output that has not been assigned with a valve, the query is carried out based on the number of the mixed circuit for BKT. A zone valve can then be controlled for a section of the BKT via the relay output. Return temperature probes/element temperature --The probe is installed in the return loop Upon selection of this option, an associated relay output must be selected. The impact corresponds with that described for "Element temperature". A correction of the measured value is carried out due to the positioning of the probe. Analogue output Not used Digital inputs The signals according to Chapter 10.4 are available. The signal "Window contact" has an impact on rooms that are connected with this V module. Refer to function description in Chapter Digital outputs In addition to the pre-assigned outputs, it is possible to define an output for the function "Collective error" Heating test/cooling test The heating or cooling test is used to check the standard behaviour and the overall function of a mixed circuit with all its components. Each mixed circuit can be operated in the heating and cooling mode with an adjustable set temperature. Return temperature probe The probe is only used to monitor the return temperature in a cooling scenario. No associated relay output is queried. Upon confirmation of the option "Return temperature probe" the screen appears, where the cooling circuits that is to be monitored is selected from the existing cooling circuits. Fig Heating test Here, all processes run in the same sequence as in normal mode: --Switching of the system in heating or cooling mode --Opening the valves on the manifolds that belong to the mixing circuit --Activating the pump --Controlling the mixing valve --Demand for heating/cooling device Fig Selection of mixed circuit (BKT) In the event that no stable flow temperature is generated, the parameters of the PI control must be optimized (see Chapter 8.4). Effect in cooling mode: When the parameter value "CDn limit value return temperature" is approached, the flow temperature of the circuit is increased. This option is particularly sensible for ceiling cooling systems. 54

55 6.20 Systems with slave units If, in addition to the HC BUS manager with address 1 (master), one or multiple additional HC BUS managers with addresses 2 and following (slave) are used, these units are configured separately and in the same manner. If no external display is used, the configuration takes place via the displays integrated in the slave units. An external display D-HC can be used to switch between the units in the top level of the user navigation. Adhere to the information in the "Manual master/slave bus system" on the enclosed DVD Optimisation of the system Optimisation room temperature regulation The quality of the room temperature regulation is primarily dependent on --Proper planning --Hydraulic calibration From the regulation perspective, it can be influenced via the --Impact level in conjunction with deviations from the setpoint (impacted by the proportional range) and the --Service output when the setpoint is reached Additional details can be found in Chapter 9 "Troubleshooting" Input of object-specific data Time programs By default (see 7.7 Time functions on page 66), the time programs are assigned to the rooms, flow temperatures, and dehumidifiers. In coordination with the user of the system, the day and week timer can be adjusted in the user menu Building characteristics The start of the heating mode is essentially dependent on the time filtering of the outside temperature but also on the impact of the rooms defined as pilot rooms. The start of the cooling mode is also depending - among other things - on this value. It is recommended in the first step to only adjust the filter time for the external temperature indicated in the parameters HL0n (n for the number of the mixed circuits). Access: Base screen User menu Service Parameter Heating Heating circuit #n P HL0n "Filter time for outside temperature" Suggestion for adjustment values: Well insulated building, normal glazing ratio --48 hours Well insulated building, high glazing ratio --30 hours Excellent insulated building, high temperature storage capacity (heavy building) --60 h 80 h Intermediate insulated building, low temperature storage capacity (light building) --24 hours Changes to these parameters impact the heating and cooling mode. An improvement in the cooling mode can result in a deterioration in the heating mode. Changes should therefore only take place in small steps Optimisation of flow temperature in a heating scenario The heating curves defined for the individual heating circuits maintain the default values during the configuration as they have been intended for the individual systems. Depending on the energy requirement of the building, the parameters --Base point --Slope --Minimal flow temperature --Maximum flow temperature must be adjusted. The progression of the heating curves for various systems is stated in Chapter 8 "Service and parameterisation" Optimisation of flow temperature in a heating scenario The mixed circuits are in principle already predefined for the cooling mode depending on the respective system. The minimum flow temperature can be adjusted depending on the cooling need, a reduction of this value may however result in potential comfort losses. A reduction of the safety margin of the flow temperature to the dew point must be handled with utmost care! It must be taken into account that --Corrupted measuring values --Inaccuracies of the flow temperature regulation or --Rapid fluctuation of the humidity can lead to condensation formation on lines or cooled building components. This may result in severe damage to the cooled surfaces or injuries due to falls on slippery flooring. 55

56 7 OPERATION The regulation system can be operated by the integrated display or via an additionally connected display D-HC. Both displays show the same content. 7.1 Operating concept The controller is operated via 6 keys, whose essential functions are explained below. The bottom line on the screen indicates which actions can be carried out with which keys. The operation of a screen is described in detail through the example of the page "Room manager" in Chapter Alarm opens the list of error messages Enter moves the cursor to the new input field or confirms an entered value Prg jumps to the main menu or opens a new input window Up increases an input value, scrolls in the selection list or switches back to the previous screen Esc aborts an entry without saving, switches to the next higher menu level Down reduces an input value, scrolls in the selection list or switches forward to the next screen Fig. 7-1 Operating concept of the regulator 56

57 7.2 Basic screens The basic screens show the most important information: --Current system mode --Outside temperature at the moment and as an mean value over time --List of the rooms with temperature set and actual values, indication of the comfort level (Normal/Reduced) Through the multiple input of ESC you can get to the basic screens from any item of the menu structure. After about 30 minutes, the system automatically jumps back to the first base screen. You can stroll back and forth between the base screens by using the arrow keys Base screen "System overview" System is in timecontrolled mode Heating mode is active (automatic mode) Heating unit is demanded Fig. 7-2 Base screen "System overview" 57

58 7.2.2 Meaning of the used icons System in standby mode, cooling mode/feeding mode blocked, frost protection is active. The weekly switch programs are in effect. System in automatic mode, heating and cooling mode are released and are started automatically. The icon with the black background indicates the currently active operating mode (in this case cooling). System in operating mode "Only heating". The heating mode will be started automatically. System in operating mode "Only cooling". The cooling mode will be started automatically. System in operating mode "Manual heating". System is in heating mode, also for outside temperatures that do not require an operation. System in operating mode "Manual cooling". System is in cooling mode, also in case of outside temperatures that do not require an operation. Holiday mode, cooling mode is blocked, heating mode is heavily reduced. Party mode, rooms are at comfort level "Normal". System was switched manually to comfort level "Normal". System was switched manually to comfort level "Reduced". The pump of the first mixed circuit is in operation. The opening level of the mixing valve of the first mixed circuits is indicated. The heating unit is demanded. The cooling device is demanded. The current outside temperature and the time-filtered temperature are indicated. 58

59 7.2.3 Basic screens "Rooms" Room names Applicable setpoint Actual value Comfort level Fig. 7-3 Basic screen "Rooms" Illustrated setpoint temperature is derived normally from the setpoint specified in the manager for the comfort level "Normal" and "Reduced" as well as the time program. However, you also have the option to adjust the room temperature setpoint at the HC units. This value is then applicable up to the next switch point of the time program and is also illustrated on this screen page. Changes of the set values that are carried out on the room unit o are only applicable up to the next switch point of the weekly time program. The area "Room manager" is used for permanent changes. 59

60 7.3 Structure of the main menu The overview below shows the most important functions with the reference to the respective chapter. Main menu Unit status/mode Room manager Settings Access: From the base screens, use the PRG key to go to the main menu. Within the main menu, the pointer that points to the individual inputs can be moved. If you confirm the selected element with the ENTER key, you moved to the respective submenu. Chapter 7.4 Unit status mode Operating mode specifies whether the system heats/cools automatically or is only allowed to heat at the moment for example and whether the time program applies Chapter 7.5 Room manager Temperature set values for the rooms, time program selection, assignment of name Chapter 7.6 Settings Parameters, which can adjust the start and output of the heating mode, can be modified here by the user. - Timer menu Week timer Day timer Circuits Dehumidifiers Party Holiday Heating period Date/Time Language System Chap. 7.7 Time functions Week timer: Compilation of the week timer (comfort level normal/reduced) for rooms and devices such as dehumidifiers. Day timer: Creating the day timers Mixed circuits: Assignment of the mixed circuits to week timer (normal/ reduced mode) Dehumidifiers: Allocation of the dehumidifiers to week timer (release) Party mode: Prevents the reduced operation for an adjustable time Holiday: Blocking of the cooling mode, significantly reduced heating in case of longer absences Heating period: Start and end of the heating mode Date / Time: Setting of system clock Language Set language System Screen pages with in depth information about the system mode, error messages, setting options Service: Access to service level (password) Service Fig. 7-4 Structure Main menu 60

61 7.4 Operating modes The operating mode of the system is derived from the combination of the comfort level and the release of the heating/cooling mode Comfort level selection Selection options: Standby All functions except the frost protection function are blocked. Timer Based on the weekly switch program, the system switches between the comfort levels "Normal" and "Reduced"; dehumidifier mode is only released during the comfort level "Normal". Normal mode (Normal) The system is permanently in the comfort level "Normal". Reduced mode (reduce) The system is permanently in the comfort level "Reduced" Heating/cooling mode Auto The system switches independently between heating and cooling mode, depending on outside temperature and temperature conditions inside the building. Only heating (winter mode) The system independently activates the heating mode, the cooling mode is blocked Only cooling (summer mode) The system independently activates the cooling mode, the heating mode is blocked. Manual heating The heating mode is started independently from the ambient conditions. Manual cooling The cooling mode is started independently from the ambient conditions. Standby Timer Auto Only heating Standard mode + Only cooling Manual heating Reduced mode Manual cooling Fig. 7-5 Combination options of the operating mode 61

62 7.4.3 Using the menu Use the ENTER key to activate the selection mode; the cursor jumps to the beginning of the left field. Use the arrow keys to select the desired comfort level and confirm with ENTER. The cursor jumps to the beginning of the right field. Use the arrow keys to select the desired heating/cooling mode and confirm with ENTER. Use Esc to exit the menu Example page operation: Room manager The operation of this page is described in detail as an example for other pages. The following entries can be changed on this page: --Room name --Week timer --Room temperature setpoint values Access: Base screen Main menu Room manager Entering / changing the room name: -- Use the arrow keys to scroll the screen pages until the desired room appears -- Pull up the name assignment with PRG -- Select icon with -- Confirm icon with ENTER key -- End process with ESC Fig. 7-6 Selecting the operating mode Access: Base screen Main menu Operating mode The assignments to dehumidifiers and fan coil as well as the release of heating/cooling modes take place during the start-up. Changes to those entries can only be carried out by the specialist company. For information about the operating principle of the week timer, see Chapter Room manager Screen content The rooms supplied by the system can be managed in the room manager: --Specification of set room temperatures for the heating and cooling mode, each for the comfort levels "Normal" and "Reduced" --Changing the room name --Assignment to a week timer Fig. 7-7 Room manager The pages also provide information about: --The room units (RU) installed in the room with address or probes (T) installed in the room --Assigned fan coil --Assigned dehumidifier --Release of the room for heating/cooling Selection/modification of the week timer for a specific room: --The cursor is moved to the input field "Week timer" via the ENTER key --The value is changed via the arrow keys; --Use ENTER to confirm or use Esc to abort without saving --If no additional modifications are desired, end with Esc; the cursor jumps to the left upper corner of the page --Return to the menu by using Esc Changing the room temperature setpoint values: --Access to the room that is to be changed as previously described --Move the cursor to the value that needs to be changed by pressing the ENTER key several times --Change the value with the arrow keys --Use ENTER to confirm and move to the next input field or use Esc to abort without saving 62

63 7.6 Set values Heating limit (S1) On these pages, the user can adjust the operation of the system to his needs without involving the installation company. The adjustment options enable the user to carry out corrections to improve the comfort. The adjustment ranges need to be selected so that no interventions are possible that could impact the functioning of the system. Nevertheless, this could result in an increased in energy consumption. Maximum changes in the setting values should therefore not be carried out permanently. Instead, the setting values of the system of the entire system should be checked through a specialized company. Fig. 7-8 Heating limit, S1 Heating limit indicates the outside temperature that triggers the heating mode of the system Using the setpoint pages After pulling up the menu item "set values", you can use the arrow keys to scroll between the pages. The setpoint pages are identified on the upper right with S1 through SB. If a value needs to be modified, use the ENTER key to move the cursor to the input field. The value can be increased or reduced with the arrow keys. The position of the pointer visually indicates the adjustment. A movement to the right means "Plus". Confirm the entry with ENTER or abort with Esc. Access: Base screen Main menu Set values S1 Value Range Base value Heating limit 11 C 19 C 15 C The reference value is not the current outside temperature but a "filtered" value, which takes the temperature progression of the last 2 days into account. You will therefore read the current outside temperature of 10 C on the base screen, e.g. on a cool morning, however, the filtered value is in the range of 16 C due to higher daytime temperatures. In the base setting, the heating mode would not be started. Prevent early heating mode to save energy costs! 63

64 7.6.3 Adjustment flow temperature (S2) The flow temperature, meaning the temperature of the heating water that is used for the surface heating, is continuously calculated to meet the needs utilizing a heating curve function based on the outside temperature, temperature in selected rooms, and based on other values. If the desired room temperatures in the heating mode are consistently not reached, a minor adjustment of this parameter of the heating curve by 0.5 K or 1 K upwards may already be sufficient. However, if one should notice that rooms overheat over longer periods of time, this heating curve parameter can be slightly reduced Switch on limit fan coils (S3, S4) The setpoint of the fan coils as a support for the heating mode and cooling mode can be defined on 2 subsequent screen pages. Depending on its configuration, the fan coil assigned to the room is started when the room temperature setpoint is not reached and/or exceeded by the entered value until the setpoint is reached. Fig Start fan coil (cooling), S4 Fig. 7-9 Adjustment flow temperature, S2 Access: Base screen Main menu Set values S2 Value Range Base value Offset ± 4 K OK Access: Base screen Main menu Set values S3,4 Value Range Base value Start (heating mode) --3 K -0.5 K -1 K Start (cooling mode) -+4 K +0.5 K +2 K The demand for fan coils takes place under the following conditions: --Generally only during the normal mode of the room (not during reduced mode or absence) --To support the heating only during the times when the system is in heating mode and when the fan coil has been configured for heating --To support the cooling only during the times when the system is in cooling mode and when the fan coil has been configured for cooling The operation of the fan coils can also be manipulated via the fan coil key on the room units. 64

65 7.6.5 Switch-on limits dehumidifier (S5, S6) The setpoint of the dehumidifiers can be defined independently from the relative humidity on 2 consecutive screen pages: --[1] for normal operating mode (during the released through the time program of the dehumidifier) and --[2] forced dehumidification outside of the time program Adjustment range of the room units (S7, S8) The adjustment range of the HC BUS room units can be defined on 2 consecutive screen pages (minimum value for cooling mode, maximum value for heating mode). Fig Maximum room temperature setpoint for heating mode, S8 Fig Start dehumidifier (normal mode), S5 Access: Base screen Main menu Set values S5,6 Value Range Base value Start dehumidifier (normal mode) --10 % +10 % Parameter DD1 (factory setting 55 %) Start dehumidifier (forced dehumidification) --20 % +20 % 80 % Access: Base screen Main menu Set values S7,8 Value Range Base value Minimum value for cooling mode 20 C 28 C 24 C Maximum value for heating mode 18 C 26 C 22 C In the "System" area (see Chapter 7.9) the setpoint adjustment for individual rooms can be blocked. This makes sense for room units in public areas as well as for pilot room probes for systems with concrete core temperature control. The forced dehumidification is deactivated if a value of 100% is set Room temperature holiday mode (S9) During the holiday mode, the system is operated in an energy-saving mode. The cooling mode is waived, the room heating takes place at a heavily reduced level. Fig Room temperature holiday mode, S9 Access: Base screen Main menu Set values S9 Value Range Base value Room temperature 8 C 16 C 12 C 65

66 7.6.8 Summer compensation, maximum room temperature in cooling mode (SA) In case of significantly increasing outside temperatures, the room temperature setpoint values are increased in order to avoid an excessive discrepancy between the temperature outside and inside the building. In the standard setting, starting with an outside temperature of 32 C, the room temperature setpoint is gradually increased up to the maximum value defined here. This maximum value applies in the standard setting for an outside temperature of 38 C. 7.7 Time functions This section summarizes all time functions that control the operation of areas of the system, meaning for example a group of rooms, and the operation of system components Week timer The week timer is used for rooms, mixed circuits, and dehumidifiers. It specifies the times of the normal mode for rooms and mixed circuits. The non-defined times correspond with the reduced operation. That means for the dehumidifiers that the operation is only released within the defined time phases. Fig Maximum room temperature setpoint (summer compensation), SA Access: Base screen Main menu Set values S10 Value Range Base value Room temperature 27 C 35 C 31 C The defined time phases for the rooms correspond with the time intervals during which actual normal mode is desired. The heating or cooling of the room automatically starts earlier at a time calculated based on the system conditions. A maximum of 10 week timer programs can be defined. An individual day timer can be selected for each day of the week. The allocation of the rooms to a week timer takes place in the room manager (see Chapter 7.5). If no week timer is allocated to a room, a regulated flow temperature or a dehumidifier, the permanent normal mode applies (comfort). If the function "Summer compensation" is not be released at the parameter level, this screen does not appear Start cooling mode (SB) The start of the cooling mode is triggered by the system based on different information about the outside temperature as well as the temperatures in the pilot rooms. The start time can be adjusted (+10 means earliest possible start). Fig Definition week timer Access: Base screen Main menu Timer Week timer A week timer can be selected via the arrow keys. The selected day timer can be viewed under the weekdays. To change the assignment, the cursor is moved to the corresponding field via the ENTER key. Use the arrow keys to select the desired day timer and confirm again with the ENTER key. Fig Start cooling mode, SB Access: Base screen Main menu Set values S10 Value Range Base value Start cooling mode

67 7.7.2 Day timers A maximum of 20 day timer programs can be set up. Each day timer can contain up to 4 cycle times. The cycle time indicates respectively the starting and end point of the normal mode or the release timeframe for dehumidifiers. The presetting for the day timer programs is dependent on the building type: Day timer Residential building Office T1 06h 22h 06h 18h T2 06h 23h59 06h 16h T3 07h 23h59 No entry T5 03h 22h 03h 17h T6 04h 23h No entry T8 06h 22h 06h 20h Week timer for rooms Fig Definition day timer Access: Base screen Main menu Timer Day timers Operation of the page: An existing entry can be changed by selecting the input field via the ENTERkey and by changing the value with the arrow keys. A new entry is generated by pressing the PRG key. An existing entry is removed by pressing the PRG key when the cursor is positioned on the line of this entry. The allocation of the rooms to a week timer takes place in the room manager (see Chapter 7.5). Standard: Week timer 1 Since the return from the reduced operation is optimized by the system, the actually desired normal times (comfort mode) can be entered. Even shorter pause times of for example 4 hours makes sense; it is certainly possible to save energy during this time Presetting of time programs Presetting of week timer: Use of the programs: Rooms: Week timer 1 Flow temperatures: Week timer 5 Dehumidifiers: Week timer 8 Week timer 1 (rooms): Monday - Thursday: Day timer 1 Friday: Day timer 2 Saturday, Sunday: Day timer 3 Week timer 5 (flow temperatures): Monday - Friday: Day timer 5 Saturday - Sunday: Day timer 6 Week timer 8 (dehumidifiers): Monday - Sunday: Day timer 8 67

68 7.7.5 Mixed circuits Party mode The function "Party" cancels the reduced operation for all time programs for the preselected time range Fig Selection week timer mixed circuit Access: Base screen Main menu Timer Mixed circuits One of the 10 week timers can be selected for each mixed circuit. Standard: Week timer 5 For the specification of the normal operating times it needs to be taken into account that several rooms with different time programs are supplied by a mixed circuit. Reduced operation of the mixed circuit therefore potentially affects rooms that need to be in normal mode during this timeframe. Fig Selection party duration 8h Access: Base screen Main menu Timer Party Operation: The party function is switched on and off using PRG. The displayed timeframe can be overwritten. The duration is entered starting with the moment of the entry. The remaining time is indicated on the screen page. The function can be ended prematurely via PRG Holiday Dehumidifiers Via the holiday function the system is switched to the operating mode "Holiday" or general "Absence" for the duration of the entered timeframe. The cooling mode is blocked in the operating mode "Holiday". The heating note starts with lower outside temperatures, a significantly reduced setpoint applies for the room temperatures, the heating output is significantly reduced (see setpoint S9). Fig Selection week timer dehumidifier Access: Base screen Main menu Timer Dehumidifiers One of the 10 week timer programs can be selected for each dehumidifier. Standard: Week timer 8 Operation of the dehumidifiers is only released for the defined timeframe in the allocated week timer. Exception: If the value of the relative humidity defined in setpoint S6 is exceeded, a forced dehumidification is also triggered outside of the release times. Fig Holiday function Access: Base screen Main menu Timer Holiday Operation: The holiday function is switched on and off via PRG. The displayed times can be overwritten. Please note that the output of the system in the cooling mode is heavily influenced by the prevailing humidity. If release times are too short, this can therefore reduce the cooling output of the system. 68

69 7.7.9 Heating period Date / Time In the base setting, the heating mode is controlled via the outside temperature and the temperature of the pilot grows. However, the heating mode of the system can also be limited to a time frame. The default is October 1 to April 30. Fig Entry date/time Access: Base screen Main menu Timer Date/time Fig Heating period specification Access: Base screen Main menu Timer Heating period Value Range Base value Start heating period Sep. 1 Dec. 1 Oct. 1 End heating period Mar. 1 May 1 May 1 Daylight savings time switch: The clock change takes place automatically On the last Sunday morning in March, the clocks are changed forward from 02:00 AM to 03:00 AM (summer daylight saving). On the last Sunday morning in October, the clocks are changed back from 03:00 AM to 02:00 AM (winter daylight saving). Operation: Use PRG to switch the limitation of the operation throughout the displayed timeframe on and off. Start and end times can be overwritten. 69

70 7.8 Language Rooms In this illustration it is taken into account when more than one heating and cooling system is installed in a room, e.g. if the room is heated via the floor heating and cooled via the ceiling. In this case, 2 configurations exist for this room which are illustrated on subsequent screen pages. Fig Language selection 1 2 Access: Base screen Main menu Language The following languages are available for selection: --German --English --Italian --Spanish Fig Diagnosis page for rooms Access: Base screen Main menu System Diagnosis Rooms System This area contains more detailed illustrations concerning the status of the system as well as expanded setting options Diagnosis Mixed circuits 1. Room name 2. Device used in the room: RU addr = room unit with address PR number = room temperature probe, number 3. Icon for comfort level 4. Relative humidity 5. Current room temperature setpoint, actual value 6. Calculated heating/cooling demand in % 7. Status of the valve on the manifold (open/closed) 8. Graphic illustration of the opening length as well as marking of the current time status Fig Diagnosis page for mixed circuits Access: Base screen Main menu System Diagnosis Mixed circuits These screen pages show the status of the existing mixed circuits, analogue to the illustration on the base screen. Different values of the filtered outside temperature for the mixed circuits are the result of different filter times that were set for different systems. The value of the filtered outside temperature is the deciding factor for the start of the heating mode of the circuit and for the calculated flow temperature. 70

71 7.9.3 Settings Configuration room terminals A for all devices applicable limitation of the minimal and maximal setpoint temperature is specified in the "Setpoints" range. In this area, each room terminal can be further limited individually with respect to its operability Operation on the RAUMATIC BUS HC room unit The user can read the following values and statuses via the HC BUS room unit: --Room temperature --Humidity --Comfort level of the room (reduced mode/normal mode/standby) --Operation of the fan coil Room temperature, setpoint, comfort level, and fan coil can be manipulated depending on the configuration of the HC unit Screen HC BUS room unit Fig Configuration room units Access: Base screen Main menu System Settings Room terminals The following limitations can be applied: Adjustment range of the room units corresponds with the limit value specified in the set values S7 and S8 Adjustment range is not limited No adjustment range Setpoint according to room manager 7.10 Service Access: Base screen Main menu Service The service area can only be accessed via a password. Fig Screen HC BUS room unit In the idle state, the room temperature, the relative humidity, the system status, and the status of the assigned fan coil (optional) are indicated on the screen. The display lighting is switched on through the operation of a control dial or keys, the light switches off again after a couple of seconds. 71

72 Setpoint adjustment Control knob The setpoint of the room temperature can be increased or decreased by turning the control knob clockwise or counter-clockwise. If the adjustment knob is only turned to the first latch position, the currently set setpoint is shown on the screen. This is illustrated by the text "Set" next to the displayed value. The setpoint is only changed when the knob is turned more. A confirmation of the adjusted setpoint by pressing the key is not necessary. If the system is in neutral mode (neither heating nor cooling), the setpoint adjustment has no effect. After a few seconds, the screen switches back to the base view. The adjustment limits of the room set values are defined in the user area. In the menu "System" of the user area, individual room units can also be set so that the currently applicable setpoint according to the week timer cannot be changed Operating mode switching "Mode" key The current operating mode specified via the time program can be changed with the Mode key. If the room is in the operating mode "Normal", this is indicated on the screen with the icon. A one-time push of the key "Mode" changes the operating mode to "Reduced". This operating mode is illustrated by the icon. The operating mode change applies until the next switch point of the time program Fan coil control "Fan" key This key is only effective if a fan coil is connected with this device. Explanation about the control of the fan coil: A fan coil can be used to support the system during high loads. The fan coil can be used in the operating mode "Heating" only, only in "Cooling" or in both operating modes. The activation of the fan coil takes place when the room temperature is outside of a tolerance range around the setpoint. Also refer to setpoints S3, S4. If the fan coil is active, the operation of the key blocks the fan coil for 30 minutes. If the fan coil is inactive, the key triggers the start of the fan coil when the room temperature does not correspond with the setpoint but still falls within the tolerance range Switching to the operating mode "Standby" "Off / Standby" key A extended pushing of the key switches the room into standby: --In the cooling mode, the room is no longer cooled --In the heating mode, this room is kept at frost protection temperature. This operating mode is illustrated through text OFF Display time "Clock" key The current time is shown for a few seconds. 72

73 8 SERVICE AND PARAMETERISATION 8.1 Service menu structure Access to the service area with password: 1314 Service menu Configuration Configuration wizard Master I/O Analogue inputs Analogue outputs Digital inputs Digital outputs Instrument configuration Devices I/O FT module V module Parameters Heating General parameters Flow temperatures Floor / wall Ceiling Concrete core temperature control Boost mode Heating circuit # n Cooling General parameters Cooling circuit # n PI controller General parameters Heating circuit #n Cooling circuit #n Room temperature regulation Other parameters Function heating Devices Heating unit Cooling unit Dehumidifiers Pumps Valves Test functions Communication Fig. 8-1 Service menu structure 73

74 8.2 Heating parameters Preliminary Remarks The key is indicated in the right top corner of the screen to identify the parameter. The top two lines indicate the menu and the submenu respectively. The texts shown in the tables below are partially shown on the screen pages in an abbreviated form General parameters Key Text in parameter menu Comment Min Max Base value Heating limit normal mode The heating mode starts when the time-filtered H1 outside temperature falls below this value by the H3 value C Applies for normal mode (not for holiday/absence) H2 Heating limit absence mode Like H1, but for holiday/absence C H3 Hysteresis heating limit Value by which the heating limit value must be undercut or exceeded to start or end the heating mode K H4 H5 Freeze protection supply temperature Outside temperature limit for reduced mode Flow temperature for the frost protection mode (building protection) The frost protection function is switched off by entering the value "0". The reduced operation specified in the time programs is no longer carried out below this outside temperature. This avoids a heating up of the building that is too slow. Unit C C Flow temperatures, boost function Menu items flow temperatures This section contains the parameters for the flow temperatures of the heating systems --Floor / wall (Key HUn) --Ceiling (Key HCn) --BKT (concrete core temperature control) (Key HSn) The parameters are used as --Default values if a mixed circuit is specified during the configuration --Reference values during supply of heating system (e.g. ceiling) via a heating circuit, which was parameterized for different system (e.g. floor) Application: Building is equipped with floor heating, only one or a few rooms have ceiling heating and are supplied by the same circuit) Changes in the parameters and the section are not transferred to the parameters of the mixed circuits 1-5! 74

75 Key Text in parameter menu Comment Min Max Base value HU01 HC01 HS01 HU02 HC02 HS02 HU03 HC03 HS03 HU04 HC04 HS04 HU05 HC05 HS05 HU06 HC06 HS06 HU07 HC07 HS07 HU08 HC08 HS08 HU09 HC09 HS09 HU10 HC10 HS10 HU11 HC11 HS11 HS12 Heat curve starting point normal mode Heat curve starting point abscence mode Heat curve slope in normal mode Heat curve starting point absence mode Minimal value flow temperature heating (normal mode) Minimal value flow temperature heating (absence mode) Maximum value flow temperature heating (normal mode) Maximum value flow temperature heating (absence mode) Filter time for outside temperature Pilot room influence on heating limit Flow temp. reduction in reduced mode Reduction of slope for return temperature The heating curve starts at this point, the value for the flow temperature is equal to the outside temperature in this case. Applies for normal mode (not absence/holiday) Like HU01 but for absence/holiday Indicates the slope of the heating curve (gradient). Applies for normal mode (not absence/holiday) Like HU03 but for absence/holiday Minimal value of the flow temperature at the start of the heating mode, independent from the heating curve function. Applies for normal mode (not absence/holiday) Like HU05 but for absence/holiday Maximum limit of the flow temperature for very low outside temperatures, independent from the heating curve function. Applies for normal mode (not absence/holiday) Like HU07 but for absence/holiday An average value formation over time for this timeframe and not the current outside temperature is used for the start and end of the heating mode as well as for the calculation of the flow temperature. Weighted with this parameter, the average deviation of the pilot rooms impacts the start and end of the heating mode (moving of the heating limit) In reduced mode (energy saving mode) the flow temperature is lowered by this value Only for BKT systems: The desired return temperature is derived from a recalculation of the heating curve with a reduced slope. The percentage for the reduction of the slope is specified here Unit C C C C C C % h K 75

76 Boost mode Key Text in parameter menu Comment Min Max Base value Unit BO01 Nominal slope reduction for return The expected return temperature outside of heating up phases is derived from a recalculation of the heating curve with a reduced slope. The percentage for the reduction of the slope is specified here % BO02 Measure time for boost mode The expected return temperature must be exceeded at least for this timeframe (also refer to BO03) min BO03 Hysteresis for boost mode The expected return temperature must be undercut by at least this value K BO04 Compensation factor for boost mode The undercutting of the expected return temperature multiplied by the compensation factor results in the increase of the flow temperature (boost mode) for the runtime defined in BO BO05 boost mode cycle time Length of time for which the boost mode is running min BO06 boost mode pause time Pause time after a cycle time in boost mode min The function "Boost mode" is released separately for each heating circuit Heating circuit number n The for each heating circuit (1-5) individual parameterisation of the flow temperature can be found in this parameter area. During the start-up, a parameter set is created for each heating circuit in line with the utilisation of the heating circuit (floor/wall, ceiling, BKT). The parameters are identified with HAn to HNn, whereas n stands for the heating circuit number (1 to 5). They therefore corresponds with the parameters HU1 (HC1, HS1) to HU10 (HC10, HS10) as well as for heating circuits for BKT and also the parameter HS12. The following additional parameters are specified individually for each circuit: Key Text in parameter menu Comment Min Max Base value HE0n Room temperature compensation factor Impact of the difference between room temperature setpoint value and actual value on the flow temperature HN0n Boost mode allowed Release of the boost mode described in Chapter No Unit 76

77 8.2.5 Heating curves Heating curves for floor/wall heating systems, Tmin (HU05) = 25 C, Tmax (HU06) = 45 C Flow temperature T flow (HU01=20,HU03=0,4) T flow (HU01=20,HU03=0,5) T flow (HU01=20,HU03=0,6) T flow (HU01=20,HU03=0,7) T flow (HU01=20,HU03=0,8) Outside temperature Fig. 8-2 Heating curves floor / wall Heating curves for ceiling heating, Tmin (HC05) = 25 C, Tmax (HC07) = 40 C T flow (HC01=20,HC03=0,4) T flow (HC01=20,HC03=0,45) T flow (HC01=20,HC03=0,5) T flow (HC01=20,HC03=0,55) T flow (HC01=20,HC03=0,6) Flow temperature Outside temperature Fig. 8-3 Heating curves ceiling Heating curves for BKT systems, Tmin (HS05) = 23 C, Tmax (HS07) = 30 C Flow temperature T flow (HS01=20,HS03=0,2) T flow (HS01=20,HS03=0,22) T flow (HS01=20,HS03=0,25) T flow (HS01=20,HS03=0,27) T flow (HS01=20,HS03=0,3) Outside temperature Fig. 8-4 Heating curves BKT 77

78 8.3 Parameter cooling General parameters Key Text in parameter menu Comment Min Max Base value Cooling mode start delay time Delay of the cooling mode start after fulfilled cooling C min criteria C02 Cooling mode minimum run time Minimum run time of cooling mode after start min C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 Heating mode blocking time after cool mode cal.time for gradient reference room temp. Calc. Time for average value ref. room temp. Factor deviation reference room temperature Basic value for current value of outside temp. basic value for average value of ouside temperature Factor deviation of actual outside temp. Factor deviation of average value out.temp. Reference room factor for gradient enable summer compensation Maximum room temperature in summer compensation Summer compensation outside temp.start Summer compensatzion outside temp.end Blocked time for heating mode starting after completion of cooling mode Cooling criteria: Time basis for the calculation of the rising (or falling) temperature in the reference room Cooling criteria: Time basis for the calculation of the mean value of the reference room temperature Cooling criteria: Weighing factor for the impact of the reference room temperature Cooling criteria: Reference value for current outside temperature (start cooling mode) Cooling criteria: Reference value for outside temperature based on average time (start cooling mode) Cooling criteria: Weighing factor for the impact of the current outside temperature Cooling criteria: Weighing factor for the impact of the mean outside temperature Cooling criteria: Weighing factor for the impact of the reference room temperature Release of summer compensation, also the adjustment of set room temperature to rising outside temperatures Highest room temperature, when the outside temperature defined in Parameter C15 is reached Outside temperature from which on the room temperature setpoint values are gradually increased to the temperature defined in C13 (for the outside temperature C15) At this temperature, the room temperature setpoint value reaches the value defined in parameter C13, there is no more additional increase Unit h min min C C C C C 78

79 8.3.2 Cooling circuit number n Key Text in parameter menu Comment Min Max Base value CAn CBn CCn CDn Cen Min. Value supply temp. cooling mode (normal) Flow. Temp.:safety distance to dew point Element temperature limit in cooling mode Return temperature limit in cooling mode Increase cooling flow temp. in reduced mode Lowest permissible flow temperature in normal mode (non-reduced mode) The flow temperature must always be higher by this value than the most unfavourable (highest) value of the dew point temperature In the cooling mode the temperature of cooled elements must not fall below this value In the cooling mode the return temperature must not fall below this value In reduced mode (energy saving mode) the flow temperature is increased by this value. Unit C K C C K 8.4 PI Controller In this section, the controller behaviour for the PI controller (proportional/integral) used for the mixed circuits is parameterized. The values stored in Chapter are used as a template during selection of the mixed circuits General parameters Key Text in parameter menu Comment Min Max Base value F1 (FH1) F2 (FC1) F3 (FH2, FC2) F4 (FH3, FC3) F5 (FH4, FC4) F6 F7 (FH5, FC5) Proportional bandwidth heating circuits Proportional bandwidth cooling circuits Integral time mixed circuits Minimum value control signal Maximum value control signal Control output signal inverted (NO/ YES) (0=norm./1=invers) Delay time for enabling PI- Controller Proportional range of the PI controller in the heating scenario. Impacts the strength of the immediate response to temperature fluctuations. The larger the range, the weaker the response K Proportional range of the PI controller in the cooling scenario. Impacts the strength of the immediate response to temperature fluctuations K The larger the range, the weaker the response. Integral time of the controller in heating and cooling scenario. Impacts the response to permanent deviation of the regulated temperature sec The longer the time, the slower the response Minimum value of the control signal for the actuating drive of the mixing circuit % Maximum value of the control signal for the actuating drive of the mixing circuit % Switching of the control signal from normal (0 100% = 0 10V) to inverse (0 100% = 10 0V) Time period after activating the heating circuit pump to the release of the PI controller sec Unit 79

80 8.4.2 Heating circuit number n The parameters defined in Chapter are adopted during the configuration of the mixed circuits and can be adjusted individually for each circuit. Parameter F6 (direction of operation control output) applies for all mixed circuits. The parameters are identified in the nomenclature FHnK, n = parameter number, K = circuit number. See key values in parentheses in the above referenced table Cooling circuit number n The same applies as an Chapter The parameters are identified in the nomenclature FCnK, n = parameter number, K = circuit number. See key values in parentheses in the above referenced table. 8.5 Room temperature regulation Key Text in parameter menu Comment Min Max Base value R1 R2 R3 R4 R5 R6 R7 Proportional bandwidth heating mode Proportional bandwidth cooling mode Pulse period time room temperature control Minimum pulse length room temperature control Optimisation room temperature control Pulse length threshold for continous mode Output signal at setpoint Proportional range of the room temperature control in the heating mode. The proportional range impacts the immediate response to temperature changes. The larger the range, the weaker the response. Like R1, but for cooling mode. Period length of the pulse width modulation signal used for the control Pulse signals below this limit value are suppressed Strength of the optimisation function impact of the room temperature control Pulse signals above this limit value lead to a permanent activation of the actuators (permanent signal) Defines the output signal of the room temperature control in % when the setpoint is reached. Can be increased to 75% or more for very well adjusted flow temperatures and very well insulated houses without overheating the rooms. Unit K K min min % % 8.6 Other parameters Key Text in parameter menu Comment Min Max Base value O1 O4 Enable automatic heating/cooling mode (0=No/1=Yes) Press ENTER for 3s to reset param. to default Automatic triggering of the cooling mode is only permitted if the system features respective switch mechanisms By pressing the ENTER key for 3 sec, all parameters will be set to the value indicated in the base values Unit 80

81 8.7 Screed heat The process of the function heating in accordance to EN 1264 is started. 8.8 Devices Parameterisation of the demand signals of the following devices: --Heater --Chiller --Dehumidifiers --Pumps of the mixed circuits --Valves Heater Key Text in parameter menu Comment Min Max Base value DH1 Minimum demand time for heater Minimum duration for demanding the heating unit min DH2 DH3 Mix.valve heat.demand signal threshold Mix.valve heat. Demand signal hysteresis The opening level of the mixing valve of the mixed circuit must exceed this value to demand the heating unit. See also DH3 Symmetrical hysteresis by the value DH2 for start and end demand Unit % % DH4 Delay time heater demand signal Waiting period prior to demanding the heating unit min DH5 Heater blocking time before restart Upon the end of the operation of the heating unit, a new demand takes place only after this blocking time has expired min Cooling unit Key Text in parameter menu Comment Min Max Base Unit value DC1 Minimum demand time heater Minimum demand time for chiller min DC2 Mixing valve position for demand The opening level of the mixing valve of the mixed circuit must exceed this value so that the cooling unit is demanded. See also DC % DC3 Hysteresis mixing valve position for demand Symmetrical hysteresis by the value DH2 for start and end demand % DC4 Delay time demand signal Waiting period prior to demanding the cooling unit min DC5 Blocking time before new demand Upon the end of the operation of the cooling unit, a new demand takes place only after this blocking time has expired min 81

82 8.8.3 Dehumidifiers Key Text in parameter menu Comment Min Max Base value DD1 DD2 DD3 DD4 Switch threshold relative humidity, normal mode Switch threshold relative humidity, forced dehumidification Hysteresis relative humidity Activiation limit dew point Hysteresis dew point When this relative humidity value is exceeded, the dehumidifier is demanded during the release time of its time program. See also DD2 Switch threshold for the forced dehumidification outside of the release time. No forced dehumidification takes place when the value 100 is entered Unilateral hysteresis around the switch threshold (switch-off point is below DD1 by this value) When this dew point value is exceeded, the dehumidifier is demanded during the release time of its time program See also DD4 Unilateral hysteresis around the switch threshold (switch-off point is below DD3 by this value) Unit % C K DD5 Minimum runtime Minimum demand time of the dehumidifier min DD6 Blocking time before restart Upon the end of the operation of the dehumidifier, a new demand takes place only after this blocking time has expired min DD7 Dehumidifying outside cooling mode allowed Dehumidification also takes place in the heating mode (Y/N) % Pumps Key Text in parameter menu Comment Min Max Base value DP1 DP2 DP3 Enable pump antiblock function (Yes/No) Start delay of pump for mixed circuit Overshoot time of pump for mixed circuit Release of the pump blocking protection function (Y/N) Waiting period before demanding the pump, calculated starting from the activation of the valves on the manifolds Run-on time of the pump, calculated starting from the activation of the valves on the manifolds Unit min min Valves Key Text in parameter menu Comment Min Max Base value DV1 DV2 DV3 Enable valve antiblock function (Yes/No) Zone valves run time Switching valves run time Release of the valve blocking protection function (Y/N) Time period for the opening of the valves on the heating circuit manifolds Time period for the reversing process of the reversing valves heating/cooling Unit min min 82

83 9 TROUBLESHOOTING 9.1 General errors Problem Possible causes Measures Reference to chapter, parameter value HC BUS room units do not show anything on the display No operating voltage Check operating voltage/conduits HC BUS room units show "Cn" on the display HC BUS room units show comfort mode on the display even though it is supposed to be reduced mode according to time program HC BUS room unit shows incorrect values for the room temperature Rooms are suddenly overheated or no longer cooled HC BUS manager switched off or not in normal operation Communication line error Address conflict Room is in return phase from reduced mode, no malfunction Impact due to draft, solar radiation or other heat sources, impact due to cool radiation from masonry Communication failure to individual modules Switch HC BUS manager to normal operation Check conduits Check set addresses of the slave none Select suitable installation location Check bus communication in service area 83

84 9.2 Problems in heating scenario Problem Possible causes Measures Reference to chapter, parameter value Room temperatures in general or at times too high Temperatures fluctuate between "too warm" and "too old" Room temperatures in general too low Room temperatures in the starting heating phase too low Only individual room temperatures are too high or too low most of the time Room temperatures are not reached at the desired time Flow temperature fluctuates significantly, mixing unit runs open and closed Desired flow temperature is not reached or only after a longer period of time Room is overheated, another one is too cold Heating output not adjusted based on building, flow temperature too high Service output of room temperature regulation at setpoint too high Proportional range of room temperature regulation set too narrow Heating output not adjusted based on building, flow temperature too low Service output of room temperature regulation at setpoint too low Heating mode is activated too late Lower threshold of flow temperature too low Supply rooms not calibrated well Adjust heating curve Reduce parameter "Output signal at setpoint" Expand proportional range Adjust heating curve Increase parameter "Output signal at setpoint" Heating limit s set too low Adjust filter time of outside temperature to match building type Adjust heating curve, special minimum value of flow temperature and base point Perform hydraulic calibration Time program unsuitable Check time program Supply of heating unit not guaranteed Check switch-off times or time program for heating unit Parameterisation of control circuit unsuitable Supply of heating unit too low Parameterisation of control circuit unsuitable Allocation HC BUS room unit incorrect Check parameterisation Check settings on the heating unit Check parameterisation Check configuration, check activation of positioning actuators 84

85 9.3 Problems in cooling scenario Problem Possible causes Measures Reference to chapter, parameter value Room temperatures in general or sometimes too high Cooling output not adjusted based on building, flow temperature too high Adjust flow temperature settings Floor temperatures in general too low Flow temperature too low Adjust flow temperature settings Room temperatures at the beginning or ending cooling phase too high Only individual room temperatures are too high most of the time Room temperatures are not reached at the desired time Condensation temporarily forms on cooled building components Flow temperature fluctuates significantly, mixing unit runs open and closed Desired flow temperature is not reached or only after a longer period of time One room is cooled too much, another one is too warm Cooling motor started too late and ended too early Supply rooms not calibrated well Time program unsuitable Supply of cooling unit not guaranteed Flow temperatures not properly regulated Moisture measurement of room temperature measurement defective Setting of flow temperature critical Parameterisation of control circuit unsuitable Supply of cooling unit too low Parameterisation of control circuit unsuitable Allocation HC BUS room unit incorrect Adjust parameters for cooling criteria Perform hydraulic calibration Check time program Check switch of times over time program for cooling unit Check set/actual values of the respective regulated circuit, check regulation function Check indicated temperature and moisture in the room Increase safety margin to measured dew point Check parameterisation Check settings on the heating unit Check parameterisation Check configuration, check activation of positioning actuators 85

86 10 INPUT/OUTPUT ALLOCATION 10.1 HC BUS manager Preset assignment Analogue inputs Channel Connector Connection Signal type Designation 1 J2 B1 Outside temperature for slave: free 2 J2 B2-3 J2 B3-4 J2 B4 Flow temperature 5 J2 B5-6 J2 B6 7 J12 B7 Return temperature 8 J12 B8 Element temperature 1 Analogue outputs 1 J9 Y1 PWM 2 J9 Y2 0 10V Regulation signal mixing valve Digital inputs 1 J2 ID1 Summer mode 2 J12 ID2 Winter mode Digital outputs 1 J3 NO1 Switch Switch valve heating/cooling 2 J10 NO2 Closer potential-free Pump mixed circuit 3 J11 NO3 Closer Demand heating unit 4 J11 NO4 Closer Demand cooling unit 5 J11 NO5 Closer 6 J11 NO6 Closer 7 J11 NO7 Closer 86

87 Additional possible allocations Designation Return loop/element temperature Element temperature 2 Room temperature 1 Room moisture 1 Room temperature 2 Room moisture 2 Room temperature 3 Analogue inputs Possible inputs B1 B8 B1 B8 B1 B8 B1 B6 B1 B8 B1 B6 B1 B8 Designation System standby Comfort mode Reduced mode Requirement pump regulated circuit Dew point monitor Requirement pump radiators Window contact (closed window = closed contact) Universal alarm (alarm when contact open) Absence Digital inputs Possible inputs In addition to the digital inputs ID1 and ID2 (by default allocated with the signals summer mode and winter mode), analogue inputs B5 and B8 can also be used for digital signals. For that, the input type is automatically set to ON/OFF. Designation Switch valve cooling Pumps radiators Fan coils Pump fan coil Valve room 1 Valve room 2 Valve room 3 Alarm Digital outputs Possible outputs Please note: A potential-free switch (C1-NO1/NC1, by default allocated for the switch valves heating/cooling), a potential-free closer (C2-NO2, by default allocated for the demand signal cooling unit) as well as 5 closers with joint potential are available. Depending on the desired function, auxiliary relays must therefore be used. 87

88 Permissible signal types Analogue input Signal type B1 B2 B3 B4 B5 B6 B7 B8 X X X X X X X X 150 X X X X X X X X PT1000 X X 0 1V X X X X X X 0 5V X X X X 0 10V X X X X 0 20mA X X 4 20mA X X ON/OFF X X X X 10.2 HC BUS room unit Screw connection 1, communication: : Ground communication line RX+/TX+: Sending/receiving (+) RX-/TX-: Sending/receiving (-) Screw connection 2 supply: : Ground operating voltage 24V~/= operating voltage Fig Connections HC BUS room unit 88

89 10.3 HC BUS manager extension (FT module) Preset assignment Analogue inputs Channel Connector Connection Signal type Designation 1 J9 B1 Flow temperature 2 J9 B2-3 J10 B3-4 J10 B4 - Analogue outputs 1 J2 Y1 0 10V Regulation signal mixing valve Digital inputs 1 J4 ID1 ON/OFF 2 J5 ID2 ON/OFF 3 J6 ID3 ON/OFF 4 J7 ID4 ON/OFF Digital outputs 1 J5 NO1 Closer potential-free Pump mixed circuit 2 J6 NO2 Closer potential-free - 3 J7 NO3 Closer potential-free - 4 J8 NO4 Closer potential-free Additional possible allocations Designation Return temperature Return loop/element temperature Element temperature Designation Demand signal pump (this circuit) Comfort mode (this circle) Reduced mode (this circle) Universal alarm x Dew point monitor x Analogue inputs Digital inputs Possible inputs B1 B4 B1 B4 B1 B4 Possible inputs ID1 ID4 ID1 ID4 ID1 ID4 ID1 ID4 ID1 ID Permissible signal types See Section Permissible signal types on page 90 89

90 10.4 HC BUS manager extension (V module) Preset assignment The preset allocation affects switch outputs as well as analogue inputs for room temperature probes that are specified during the configuration: --Switch outlets for valves (heat circuit manifold, zone valves) --Switch outlets for dehumidifiers (1 x valve dehumidifier, 1 x demand signal dehumidifier) --Switch output for fan coil (demand signal dehumidifier) --Analogue input from room temperature probe RT-HC Additional possible allocations Designation Return temperature Return loop/element temperature Element temperature Designation Demand signal pump circuit x Window contact (closed window = closed contact) Universal alarm x Dew point monitor x Designation Analogue inputs Digital inputs Digital outputs Possible inputs B1 B4 B1 B4 B1 B4 Possible inputs ID1 ID4 ID1 ID4 ID1 ID4 ID1 ID4 Possible inputs Group alarm NO1 NO Permissible signal types For all analogue inputs: 0 1V 0 5V 0 20mA 4 20mA The inputs B1, B2 as well as B3, B4 can only be set in pairs for a specific signal type. 90

91 11 APPENDIX 11.1 Predefined schemas The predefined schemas are selected by entering the four-digit code. Explanation concerning the table headlines: Field bus system: Indicates whether field bus components are used (FT module, V module, room units). Currently, only schemas without fieldbus system are available. Room probe: Indicates the number of used room temperature/humidity probes RT regulation: Yes: The utilized room temperature probes are used for the room temperature regulation of up to 2 rooms No: Existing room temperature/humidity probes are only used for the calculation of the dew point Dehumidification: A dehumidifier is activated Code Description Field bus system Room probe RT regulation Dehumidification Utilisation of the HC BUS manager without fieldbus system. Pure flow temperature regulation based on heating curve, in cooling scenario only in consideration of the return temperature and optionally of the building component temperature. No room temperature and humidity probe. Demand of the mixed circuit takes place via digital input ID1. The connection of a dew point probe is intended on ID As , however with 1 room temperature/humidity probe to record the dew point. No room temperature regulation No 0 No No No 1 No No As , but with room temperature regulation No 1 Yes No As , but with dehumidifier activation No 1 Yes Yes As , however with 2 room temperature/humidity probe to record the dew point. No room temperature regulation No 2 No No As , but with room temperature regulation No 2 Yes No As , but with also with the humidification No 2 Yes Yes 91

92 11.2 Circuit diagrams heater demand chiller demand M L N actuator mixing valve PWR 0..10V 24 VAC 24 VAC J1 SYNC 800 ma T Room 1 Temp./ humidity probe Predefined scheme CODE : Without field bus system, without humidity and temperature probe/ only flow temperature control pump mixed circuit valve position cooling valve position heating power supply switching valve + M H + M H Outside- temp.- probe Room 2 Temp./ humidity probe Flowtemp. probe Ret.- temp. probe. floor temp. probe N L M G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 plan -RX/TX +RX/TX -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 J5 J8 J9 J10 J11 2nd level J12 J4 HC BUS Manager J2 J3 230V/ 24VAC Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independend to the control system! This switches off the pump when high temperature occurs. Definition HC BUS Manager Outputs: NO1/NC1: Switching valves heating/cooling NO2: Pump mixed circuit NO3: Demand signal heating NO4: Demand signal cooling 24 VAC dew point monitor (optional) Fig Predefined schema code

93 M heater demand chiller demand L N actuator mixing valve PWR 0..10V 24 VAC 24 VAC J1 SYNC 800 ma T Room 1 Temp./ humidity probe Predefine scheme CODE : Without field bus system / 1 humidity + temperature probe / without room temperature control pump mixed circuit valve position cooling valve position heating power supply switching valve + M H Outside- temp.- probe Flowtemp. probe Ret.- temp. probe. floor temp. probe N L M G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 plan -RX/TX +RX/TX -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 J5 J8 J9 J10 J11 2nd level J12 J4 HC BUS Manager J2 J3 230V/ 24VAC Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independend to the control system! This switches off the pump when high temperature occurs. Definition HC BUS Manager Outputs: NO1/NC1: Switching valves heating/cooling NO2: Pump mixed circuit NO3: Demand signal heating NO4: Demand signal cooling 24 VAC pump demand signal (optional) dew point monitor Fig Predefined schema code

94 heater demand chiller demand M V1 L N actuator mixing valve 24 VAC PWR 0..10V 24 VAC 24 VAC J1 SYNC 800 ma T Room 1 Temp./ humidity probe Predefined scheme CODE : Without field bus system / 1 humidity + temperature probe / room temperature control pump mixed circuit valve position cooling valve position heating power supply switching valve + M H + M H Outside- temp.- probe Room 2 Temp./ humidity probe Flowtemp. probe Ret.- temp. probe. floor temp. probe N L M G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 plan -RX/TX +RX/TX -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 J5 J8 J9 J10 J11 2nd level J12 J4 HC BUS Manager J2 J3 230V/ 24VAC Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independend to the control system! This switches off the pump when high temperature occurs. Definition HC BUS Manager Outputs: NO1/NC1: Switching valves heating/cooling NO2: Pump mixed circuit NO3: Demand signal heating NO4: Demand signal cooling NO5: valve room 1 24 VAC valve room 1 pump demand signal (optional) dew point monitor Fig Predefined schema code

95 M heater demand chiller demand VD V1 L N actuator mixing valve 24 VAC 24 VAC 24 VAC PWR 0..10V 24 VAC J1 SYNC 800 ma T Room 1 Temp./ humidity probe Predefined scheme CODE : Without field bus system / 1 humidity + temperature probe / room temperature control / activation of dehumidifier pump mixed circuit valve position cooling valve position heating power supply switching valve + M H + M H Outside- temp.- probe Room 2 Temp./ humidity probe Flowtemp. probe Ret.- temp. probe. floor temp. probe N L M G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 plan -RX/TX +RX/TX -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 J5 J8 J9 J10 J11 2nd level J12 J4 HC BUS Manager J2 J3 230V/ 24VAC Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independend to the control system! This switches off the pump when high temperature occurs. Definition HC BUS Manager Outputs: NO1/NC1: Switching valves heating/cooling NO2: Pump mixed circuit NO3: Demand signal heating NO4: Demand signal cooling NO5: Switching valves cooling (cooling mode) 24 VAC dehumidifier valve dehumidifier valve room 1 pump demand signal (optional) Fig Predefined schema code

96 heater demand chiller demand L N actuator mixing valve PWR 0..10V 800 ma T Room 1 Temp./ humidity probe Predefine scheme CODE : Without field bus system / 2 humidity + temperature probes / without room temperature control pump mixed circuit valve position cooling valve position heating power supply switching valve + M H + M H M J1 SYNC Room 2 Temp./ humidity probe Flowtemp. probe Ret.- temp. probe. floor temp. probe Outside- temp.- probe N L M G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 plan -RX/TX +RX/TX -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 24 VAC 24 VAC J5 J8 J9 J10 J11 2nd level J12 J4 HC BUS Manager J2 J3 230V/ 24VAC Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independend to the control system! This switches off the pump when high temperature occurs. Definition HC BUS Manager Outputs: NO1/NC1: Switching valves heating/cooling NO2: Pump mixed circuit NO3: Demand signal heating NO4: Demand signal cooling 24 VAC pump demand signal (optional) Fig Predefined schema code

97 M heater demand chiller demand V1 V1 L N actuator mixing valve 24 VAC 24 VAC 24 VAC PWR 0..10V 24 VAC 24 VAC J1 SYNC 800 ma T Room 1 Temp./ humidity probe Predefined scheme CODE : Without field bus system / 2 humidity + temperature probes / room temperature control pump mixed circuit valve position cooling valve position heating power supply switching valve + M H + M H Outside- temp.- probe Room 2 Temp./ humidity probe Flowtemp. probe Ret.- temp. probe. floor temp. probe N L M G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 plan -RX/TX +RX/TX -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 J5 J8 J9 J10 J11 2nd level J12 J4 HC BUS Manager J2 J3 230V/ 24VAC Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independend to the control system! This switches off the pump when high temperature occurs. Definition HC BUS Manager Outputs: NO1/NC1: Switching valves heating/cooling NO2: Pump mixed circuit NO3: Demand signal heating NO4: Demand signal cooling NO5:valve room 1 NO6:valve room 2 valve room 1 valve room 2 pump demand signal (optional) dew point monitor Fig Predefined schema code

98 L N M actuator mixing valve heater demand chiller demand dehumidifier valve dehumidifier VD valve room 1 valve room 2 V1 V2 pump mixed circuit N L 24 VAC 24 VAC 24 VAC PWR 0..10V 24 VAC 24 VAC dew point monitor 24 VAC Attention To avoid damages on the heated elements there is always a limiting thermostat to be used which is working independend to the control system! This switches off the pump when high temperature occurs. J1 SYNC valve position cooling valve position heating M 800 ma T power supply switching valve + M H + M H G G0 B1 B2 B3 B4 B5 B6 +5Vref +VDC ID1 C1 NC1 NO1 plan -RX/TX +RX/TX -RX/TX +RX/TX Y1 Y2 NO2 C2 C3 NO3 NO4 NO5 NO6 NO7 C3 ID2 B7 B8 J5 J4 J8 J9 J10 HC BUS Manager J11 2nd level J12 Definition HC BUS Manager Outputs: NO1/NC1: Switching valves heating/cooling NO2: Pump mixed circuit NO3: Demand signal heating NO4: Demand signal cooling NO5: valve room 1 NO6: valve room 2 NO7: dehumidifier demand signal J2 J3 pump demand signal (optional) 230V/ 24VAC Outside- temp.- probe Room 1 Temp./ humidity probe Room 2 Temp./ humidity probe Flowtemp. probe Ret.- temp. probe. floor temp. probe Predefined scheme CODE : Without field bus system / 2 humidity + temperature probes / room temperature control / demand signal for dehumidifier (only 1 output) Fig Predefined schema code

99 12 PROBE VALUES 99