High Density Cooling Systems

Transcription

1 OPERATION MANUAL Close Control Units Controller for Row-DENCO High Density Cooling Systems

2 Table of Contents Controller for Row-DENCO 1 Safety and User Information Availability of the operation manual Used symbols Labelling of safety information Used safety symbols Safety-conscious work procedures Proper use Modifications and changes Spare parts Disposal Personnel selection and qualification General Characteristics User interface Main Screen Status Screen Parameter Setting Screens Password management Menu items Group A screens Group B screens Group C screens Group D screens Group E screens Group F screens Diagrams Control diagrams Alarm threshold diagram Ambient humidity control diagram Operating in Cooling Mode Cooling on chilled water units Cooling on chilled water units with two interlaced coils Cooling on direct expansion units Additional Functions Minimum outlet temperature limit function Dehumidification function Power transducer function Alarm Event Serious/minor alarm Reset alarm status LAN LAN local network management PR GB Subject to Modifications R2-01/2016

3 Controller for Row-DENCO Table of Contents 10.2 LAN network functions Configuring the software for unit recognition and management Connection to the remote terminal from the board Electrical connections Maximum distance between the terminal and the board Displaying the network from the terminal Serial Boards and Supervisory System Alarm Event PROTECTION NOTICES The reproduction, distribution and utilization of this document as well as the communication of its contents to others without express authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or design. PR GB Subject to Modifications R2-01/2016 3

4 Safety and User Information Controller for Row-DENCO 1 Safety and User Information This is an original operation manual verified by the manufacturer. DencoHappel Row-DENCO units are designed in accordance with state-of-the-art technological and engineering standards as well as in conformity with the recognized safety regulations. Use the DencoHappel unit in a technically sound condition for the intended purpose observing the current operation manual, taking safety aspects and potential hazards into account. It is important to appreciate that failure to follow the instructions in this manual may result in danger to health and safety, material-only damage and incorrect unit operation. Have all faults repaired by an authorized specialist without delay! ATTENTION Risk of damage to the unit! In case of alarms and faults, always make sure that the cause of the fault is identified. In particular, multiple resets of an alarms without first rectifying the cause can damage the unit and invalidate the warranty. 1.1 Availability of the operation manual This operation manual contains important information regarding safe and correct operation of the unit. This manual must always be available at the site where unit is operating. Every person working on the equipment must read this manual fully before commencing the work and take note of all relevant information while performing a task. The operation manual is intended to be used by fitting and installation companies, building services engineers, technical personnel or trained persons as well as electrical and refrigeration engineering specialists. 1.2 Used symbols The following symbols are used to highlight particular text sections in this operation manual: This symbol is used to indicate normal lists. This symbol indicates instructions to follow. The result of an action is indicated with this symbol. Notice! Additional details on using the unit are specified here. Recycling! This symbol is used to highlight instructions for the proper recycling of packaging material and assembly groups no longer in use (separated according to recyclable materials). 4 PR GB Subject to Modifications R2-01/2016

5 Controller for Row-DENCO Safety and User Information 1.3 Labelling of safety information To designate the safety instructions the following symbols and notices are provided in appropriate places throughout this document: DANGER Death/serious irreversible injury Example: Indicates an extremely hazardous situation which will result in death or serious irreversible injury, if the safety instruction is not followed. Electrocution through hazardous voltage will lead to death or serious injury. Disconnect the unit from the power supply and ensure the power cannot be switched back on. Ensure the unit is voltage-free and isolated, earth and short circuit the unit, cover or shield off neighboring live components WARNING Death/serious injury Example: Indicates a hazardous situation which can result in death or serious irreversible injury, if the safety instruction is not followed. High concentration of refrigerants in the air can result in death or serious injury! High concentration of refrigerants in the air may have an anaesthetic effect and cause unconsciousness. Prolonged exposure may cause irregular heartbeat and sudden death. Very high concentration of refrigerant may cause suffocation by reduced oxygen content in the surrounding air. You should therefore only work in an adequately ventilated environment, and exercise due care and attention when carrying out the work. Wear protective clothing and, if necessary, an autonomous breathing apparatus CAUTION Minor or moderate injury Example: Indicates a hazardous situation which can result in minor or moderate injury, if the safety instruction is not followed. Sharp edges can cause injuries! Observe precaution when cleaning due to risk of cuts on thin and sharp edges. Wear protective gloves. PR GB Subject to Modifications R2-01/2016 5

6 Safety and User Information Controller for Row-DENCO ATTENTION Environmental or material damage ATTENTION Examples: Indicates actions that can result in equipment or property-damage only accidents. ATTENTION Risk of environmental damage! Heavily contaminated filters can have a negative impact on production processes. Depending on the filtered-out materials, contaminated filters are therefore classified as hazardous waste and must be properly disposed of according to the prevailing guidelines and laws. ATTENTION Risk of damage to the unit! If dampers are abruptly shut during unit operation, the unit can be damaged beyond repair as a result of negative pressure or overpressure. 1.4 Used safety symbols Electrical hazard Toxic substances Static discharge Sharp cutting edges Environmental damage Damage to the unit 1.5 Safety-conscious work procedures ATTENTION Danger of damage due to static discharge! This symbol warns about risk of static discharge-related damage to the unit. Observe the following instructions when carrying out installation, adjustment or repair jobs: Wear suitable protective clothing during work, such as protective footwear, gloves, safety goggles, etc.. When working on Row-DENCO equipment you may need to wear suitable Personal Protective Equipment (P.P.E.) to comply with EN Only qualified staff with a history of assessing and minimising risk should be allowed to work on the equipment. As a minimum we would suggest suitable safety footwear, suitable gloves, suitable eye 6 PR GB Subject to Modifications R2-01/2016

7 Controller for Row-DENCO Safety and User Information protection and suitable overalls. More P.P.E. may be required depending on your personal risk assessment. When working within range of mains voltage: Electrocution through hazardous voltage will lead to death or serious injury. Disconnect the unit from the power supply and ensure the power cannot be switched back on. Ensure the unit is voltage-free and isolated, earth and short circuit the unit, cover or shield off neighboring live components. Please comply with the installation and shipping instructions for DencoHappel units. Observe the pre-commissioning check points. Always make sure that the DencoHappel unit is accessible only to authorized and trained technical personnel. If necessary, use appropriate equipment to keep unauthorized persons away from the unit. Have all leaks eliminated by the DencoHappel Service or a specialist refrigeration company immediately. Pay attention to the safety labels fitted to the unit. 1.6 Proper use DencoHappel Units of Row-DENCO series are designed as indoor units for connection with an associated heat rejection system (condensing unit or chiller) and are design to perform cooling, humidification and filtering of air at atmospheric temperatures. Unless otherwise stated the equipment will not be suitable for use in a corrosive atmospheres such as, areas near large volumes of salt water, for example. Improper use Proper use also comprises adherence to the operation manual for the controller and inspection and maintenance requirements stipulated by DencoHappel. Any use other than that described above is considered improper. The manufacturer/ supplier is not liable for damage arising from improper use. The user alone bears the risk. Personal injury and damage to the unit! It is not allowed to operate DencoHappel units of Row-DENCO series: in explosion risk areas in areas with strong electromagnetic fields, (electromagnetic immunity as of EMC Directive; refer to the Declaration of Conformity in the unit documentation) in environment with high levels of air contamination in environments with corrosive and/or aggressive air 1.7 Modifications and changes Changes, alterations or modifications of the unit are not allowed. Tampering with the unit or its misapplication will invalidate the CE conformity and void warranty. If delivered units are disassembled by others on-site, the factory warranty is rendered invalid. In this case professional services by DencoHappel should be arranged in advance. 1.8 Spare parts Only original DencoHappel spare parts are allowed, since DencoHappel is not liable if third-party spare parts are used. PR GB Subject to Modifications R2-01/2016 7

8 Safety and User Information Controller for Row-DENCO 1.9 Disposal Equipment, operating supply materials, components and filters must be disposed of according to the material type in a safe and environmentally friendly manner Personnel selection and qualification Ensure that every person working on the unit has read and understood entire operation manual. Please read this document fully before commencing any work, and not while performing a task. All jobs must only be carried out by qualified licensed staff or other individuals with proper professional training and experience in the following areas: occupational health and safety regulations accident prevention regulations directives and recognized codes of practice All jobs with the refrigeration circuit shall be performed only by certified and licensed staff in accordance with the valid EG Regulation 842/2006 Article 5, EG Regulation 303/2008 Article 4 and 5 as well as "Ordinance on climate protection against changes caused by release of certain fluorinated greenhouse gases" Article 5, passed by the German parliament. All skilled staff must be able to assess the entrusted work and must be able to recognize and avoid all associated dangers. 8 PR GB Subject to Modifications R2-01/2016

9 Controller for Row-DENCO General Characteristics 2 General Characteristics 2.1 User interface The user interface comprises: 132x64 pixel backlit LCD display backlit buttons The microprocessor board and user interface are connected by a 4-wire telephone cable via jack J7. The terminal is supplied directly from the control board via the above-mentioned cable. Like the control board, this is already configured for operation in a LAN (local network) so as to share the remote terminal. Fig. 2-1: User interface General function of the buttons ALARM button: reset the alarm (if held for 5 seconds) PRG button: enter the parameter setting menu ESC button: exit the screens UP button: scroll and/or change screen change values scroll inside the menus ENTER button: confirm changes access setting areas DOWN button: scroll and/or change screen modify the values scroll inside the menus PR GB Subject to Modifications R2-01/2016 9

10 General Characteristics Controller for Row-DENCO LED signals Yellow LED on the PRG button Red LED on the ALARM button The green LEDs include: The green LEDs come on when: The green LEDs go off: the yellow LED on the PRG button is always on when the unit is operating (fans active) the red LED on the ALARM button flashes in the event of an alarm or maintenance signal the LEDs on the ESC, UP, ENTER and DOWN buttons display backlighting the unit is switched on a button is pressed there is an alarm or maintenance signal when an alarm event has ceased after 180 seconds (3 minutes) of complete inactivity on the user terminal keypad Adjusting display contrast PRG + ALARM + UP + + increase contrast + + PRG + ALARM + DOWN decrease contrast ON/OFF from keypad + PASSWORD + PASSWORD ENTER + PASSWORD when OFF switches the unit on ENTER + PASSWORD when ON switches the unit off 10 PR GB Subject to Modifications R2-01/2016

11 Controller for Row-DENCO Main Screen 3 Main Screen Password management USER password MAINTENANCE password MANUFACTURER password All the parameter setting screens can be accessed after entering a numerical password. Three password levels are available: for the user for use by maintenance technicians/service centres only available to the manufacturer's personnel (not disclosed externally) How to enter the password: Pressing the PRG button once displays the screen for entering the user/ maintenance password Pressing the PRG button for 5 seconds displays the screen for entering the manufacturer password General layout of the main screen Below is the layout of the main screen, showing the numbered areas this is divided into: Area 1 This area shows a schematic representation of the controlled unit Area 2 General unit status unit off unit on in normal operation PR GB Subject to Modifications R2-01/

12 Main Screen Controller for Row-DENCO Area 3 Detailed unit status active alarm maintenance signal manual controls active unit on/off from terminal unit on/off from remote contact unit on/off from supervisory system reserve unit off in plan unit on in plan reserve unit on in plan due to: high/low temperature/humidity compressor called but shutdown by high pressure function at start up compressor called but shutdown by unbalanced pressure function at start up Area 4 This area features an icon that, in the event of an alarm or maintenance signal, indicates either the type of alarm or device that requires maintenance With active alarm signal Pressure difference DRX Control envelope shape inconsistent inconsistent DRX Envelop compressore inverter DRX Compressor inverter DRX Fire/smoke alarm Water in the condensate collection pan Risk of condensate formation DRC Fan 4 disconnected Fan 3 disconnected Fan 2 disconnected Fan 1 disconnected Flow alarm DRC/DRX High compressor discharge temperature alarm DRX High compressor discharge temperature DRX High pressure DRX Frost protection alarm DRX Low pressure DRX Electronic thermostatic valve DRX Electric heater thermal protector DRC/DRX No power DRC Dirty filters DRC/DRX Humidifier generic alarm DRC/DRX Humidifier water drain alarm DRC/DRX Humidifier cylinder lifetime alarm DRC/DRX Humidifier offline alarm DRC/DRX Humidifier high current alarm DRC/DRX 12 PR GB Subject to Modifications R2-01/2016

13 Controller for Row-DENCO Main Screen Area 4 With active alarm signal continued Humidifier no water alarm Humidifier low current alarm EEPROM fault DRC/DRX DRC/DRX Door open Compressor discharge temperature probe DRX Circuit 2 water temperature probe fault DRC Circuit 1 water temperature probe fault DRC Outlet air temperature probe 4 Outlet air temperature probe 3 Outlet air temperature probe 2 Outlet air temperature probe 1 Intake air temperature probe 4 Intake air temperature probe 3 Intake air temperature probe 2 Intake air temperature probe 1 Room temperature probe Room humidity probe fault plan alarm DRC/DRX High outlet air temperature High intake air temperature High room temperature Low room temperature High room humidity Low room humidity High water temperature, circuit 2 DRC High water temperature, circuit 1 DRC Power transducer alarm Expansion alarm Incorrect password (5 attempts) If more than one alarm is active, the area displays the most serious alarm. The seriousness of the alarms displayed in this area reflects the order these are listed in the table, from the most serious to the least serious. The seriousness of alarms is evaluated based on the consequences these have on operation of the airconditioning unit. Area 4 With maintenance signal Inverter-driven compressor hour threshold Heater 1 and 2 hour threshold Humidifier cylinder hour threshold Fan 5 hour threshold Fan 4 hour threshold Fan 3 hour threshold Fan 2 hour threshold Fan 1 hour threshold Area 5 This area displays icons corresponding to the currently active devices Circuit 1 water valve open Circuit 2 water valve open Compressor operating level PR GB Subject to Modifications R2-01/

14 Main Screen Controller for Row-DENCO Area 6 This area displays icons corresponding to the currently active devices Circuit 2 water valve open (freecooling unit) Area 7 This area displays icons corresponding to the currently active devices Humidifier active Dehumidification active Area 8 This area displays icons corresponding to the currently active devices Heaters 1 and/or 2 active Area 9 This area shows the unit LAN address Area 10 This area indicates unit on/off from user terminal press ENTER to switch the unit off press ENTER to switch the unit on Area 11 This area shows the time and dates Area 12 This area displays the maximum outlet temperature read by the 4 probes or the room temperature (if the corresponding probe is fitted) Area 13 This area displays the relative humidity of the intake air (if the corresponding probe is fitted) 14 PR GB Subject to Modifications R2-01/2016

15 Controller for Row-DENCO Status Screen 4 Status Screen MAIN SCREEN 1 PROBE READINGS 2 Water valve status 3 LAN STATUS 4 Humidifier status 5 Status of electronic valve 6 Set-points TO MODIFY USER password Change set point TO MODIFY MAINTENANCE password Change maintenance threshold 7 Operating hours TO RESET MAINTENANCE password Reset operating hours 8 Number of starts TO MODIFY MAINTENANCE password Reset number of starts 9 Read electrical parameters 10 Access log TO DISPLAY Display alarm log 11 Software INFO MAINTENANCE password Delete alarm log NB: the screens described above only provide information via graphic icons PR GB Subject to Modifications R2-01/

16 Status Screen Controller for Row-DENCO Starting from the main screen, pressing UP/DOWN accesses the following status screens, in sequence: 1 FAN STATUS AND PROBE READINGS: A screen displaying the temperature values read by the probes (outlet and intake air temperature probe) and percentage of fan operation 1 PROBE READINGS 2 WATER VALVE STATUS/OPTIONAL PROBE READINGS: A screen displaying the temperature values read by the probes, chilled water temperature probe and the opening of the chilled water modulating valves, as a percentage 3 Local Area Network (LAN) status: A screen displaying the status of all the units connected to the LAN (local network) 2 Water valve status Optional Probe readings 3 LAN STATUS 4 HUMIDIFIER STATUS: A screen displaying the status of the humidifier, with all the technical operating values 4 Humidifier status 5 Electronic Valve Status: A screens displaying the data corresponding to the operation of the electronic thermostatic valve 5 Electronic Valve Status 6 SET POINTS: A screen displaying the active control set points; from this screen, pressing PRG and entering the USER password, a further screen can be accessed for modifying the set point and proportional band 7 OPERATING HOURS: A screen displaying the total operating hours of the components on the unit; from this screen, following the instructions shown on the display and after entering the MAINTENANCE password, the operating hours for each component can be reset (set to zero) or different thresholds can be set for the maintenance alarm 6 Set Points 7 Operating hours 8 NUMBER OF STARTS: A screen displaying the total number of starts for the components on the unit; from this screen, following the instructions shown on the display and after entering the MAINTENANCE password, the number of starts for each component can be reset 9 ELECTRICAL PARAMETERS: A screen displaying the electrical parameters (for units with optional power transducer) 8 Number of starts 9 Electrical parameters 10 ACCESS LOG: A screen to access and display the alarm log. On this screen, the alarm/events log can be reset, by following the instructions shown on the display after entering the MAINTENANCE password 10 Access log 11 SOFTWARE INFO: A screen displaying information on the software installed 11 Software INFO 16 PR GB Subject to Modifications R2-01/2016

17 Controller for Row-DENCO Parameter Setting Screens 5 Parameter Setting Screens MAIN SCREEN PRG password (*) SETUP Temperature and ALARMS SERIOUS ALARM RESET ALARMS OUTPUT A/B SETUP SERIAL SETUP LAN SETUP SETUP ADVANCED SET POINT FREE COOLING DUAL COOLING FROST SENSOR Password SETUP CLOCK SETTING TEST/ MANUALS TEST MANUALS TEST digital input digital output ramp simulators SETUP Configure type of unit Presence of remote ON/OFF sensors SETUP Enable fans DEFAULT Setup evaporator fan + Economy mode Setup fan modulation setup fans door open alarm setup valve control ADAPTIVE SETPOINT DEW POINT control AIR FLOW-RATE MODULATION (*) the screens visible with the USER password are shown in bold. To display all these screens, the MAINTENANCE password needs to be entered. CONDENSER MANAGEMENT CONDENSER CONTROL VALVE MANUFACTURER password HUMIDIFIER CONFIGURATION PR GB Subject to Modifications R2-01/

18 Parameter Setting Screens Controller for Row-DENCO 5.1 Password management Starting from the main screen, pressing the PRG button and entering the correct password accesses a menu used to set all the other parameters that are not available on the status screens, as described in the previous paragraph. Three passwords can be entered: USER password: MAINTENANCE password: MANUFACTURER password: allows access to parameters considered useful and easy to understand for the user allows access to all the fundamental configuration parameters, which includes user parameters and the MAINTENANCE parameters. allows access to all USER-MAINTENANCE-MANUFACTURER parameters and for exclusive use by authorised DencoHappel personnel. If required, this password must be requested, along with reasoning from Customer Technical Service, which will provide all information if appropriate. 5.2 Menu items The complete menu items are as follows: A SETUP (alarms setting) (USER password) (MAINTENANCE password) (MANUFACTURER password) This is used to set the address of the alarm digital outputs available on the controller. This is used to set the thresholds for alarms activated when exceeding a certain limit (high and low room temperature, high and low relative humidity, high water temperature). To access to set the delays for some alarms, how serious the alarms are, the type of reset (automatic or manual) for some alarms, and the addresses of the alarm digital outputs available on the controller B SETUP (serial) (MAINTENANCE password) To access to configure the serial communication parameters to configure the Local Area Network (LAN) C SETUP (control settings) (MAINTENANCE password) This is used to modify some critical parameters that are part of the control algorithm installed inside the control system D SETUP (clock setup): (USER password) This is used to set the current time and date E TEST/ (test/manual control) (MAINTENANCE password) This menu is used to manually control all the devices on the unit, for a maximum of 30 minutes, disabling normal automatic control; moreover, the status of all the contacts (inputs and outputs) that are managed by the control board can be checked. 18 PR GB Subject to Modifications R2-01/2016

19 Controller for Row-DENCO Parameter Setting Screens F SETUP (unit configuration) (MAINTENANCE password) Settings that involve the configuration of the devices, probes and sensors on the unit G SETUP (MANUFACTURER password) Settings corresponding to the electronic expansion valve. This menu is only active on direct expansion units H DEFAULT SETUP (MANUFACTURER password) This is used to restore the default parameter values. IMPORTANT Damage to the unit! This operation deletes the entire buffer memory (including the alarm log!), then installs the default values. The unit then needs to be reconfigured after having upgraded the software on the board and after having installed the default parameters. 5.3 Group A screens Screen A1-A2 Temperature and humidity thresholds (MAINTENANCE password) This screen is used to change the thresholds to alarms activated when parameters exceed their limits (room temperature, room humidity, water temperature) Screen A3 ALARM DELAY (MANUFACTURER password) This screen is used to change the alarm delays, in particular: the delay in signalling the alarms when exceeding the room temperature and humidity limits Screen A4 SERIOUS ALARM (MANUFACTURER password) This screen is used to set whether each alarm is SERIOUS or MINOR: SERIOUS: stops the unit from functioning MINOR: display only, normal cooling and functions resume See the table in the paragraph Alarm Event auf Seite 55. PR GB Subject to Modifications R2-01/

20 Parameter Setting Screens Controller for Row-DENCO Screen A5 RESET MODE (MANUFACTURER password) This screen is used to change the RESET MODE (automatic or manual) for certain alarms Screen A6 ALARM OUTPUT STATUS (USER password) This screen is used to change the status (at rest) of the alarm contacts available. The control board features two relay outputs for alarm signals. Accessing the alarm setting screens with the USER password, this item is used to configure the alarm outputs available. The following functions are available in these screens: set the status of the output contacts when de-energised set the alarm signal contact Setting output contact status This configuration screen is used to set the status of the output contacts when de-energised.the options are: Normally open Normally closed (in this case, power failures to the board can also be signalled) Setting the signal contact For each type of alarm available on the unit, the contact used to signal the alarm can be configured. The options are: Output "A" Output "B" No output By default all alarms are signalled via output "A", which in this case represents a general alarm output. 20 PR GB Subject to Modifications R2-01/2016

21 Controller for Row-DENCO Parameter Setting Screens Screen A7-A8-A9 "A/B SETUP" (USER password) These screens are used to modify the output contact that each type of alarm is signalled through. 5.4 Group B screens Screen B1 "SERIAL SETUP" (MAINTENANCE password) This screen is used to change all the parameters relating to unit serial communication (connection to supervisory system via serial card accessory). PR GB Subject to Modifications R2-01/

22 Parameter Setting Screens Controller for Row-DENCO Screen B2 "LAN SETUP" (MAINTENANCE password) This screen is used to change all the parameters corresponding to unit operation in the local network (LAN): number of units connected in the network, enable operation based on average room temperature and humidity values, enable presence of standby unit with rotation, optional cycle time for rotation of the standby unit and enable standby unit operation when exceeding set limits. 5.5 Group C screens Screen C1 "ADVANCED PARAMETERS" (MANUFACTURER password) This screen is used to change some advanced parameters that concern room temperature and humidity control: start up delays, integration time (set to 0 to disable integral control and activate purely proportional control) Screen C3 "FREE COOLING SETTINGS" (MAINTENANCE password) Screen active if unit configured as FREECOOLING, and used to set the main parameters Screen C4 "DUAL COOLING SETTINGS" (MAINTENANCE password) Screen shown when the unit is configured as DUAL COOLING, used to set the main parameters Screen C5 "FROST PROTECTION" (MANUFACTURER password) (MAINTENANCE password) This screen is used to control the low evaporation pressure value on direct expansion units, to prevent the evaporator coil from freezing. If the value read is less than the set point for a time set by parameter, an alarm is generated. The alarm is reset AUTOMATICALLY until a set number of activations/ hour, after which it needs to be reset MANUALLY. 22 PR GB Subject to Modifications R2-01/2016

23 Controller for Row-DENCO Parameter Setting Screens Screen C6-C7 "SENSOR CALIBRATION" (MAINTENANCE password) This screen is used to calibrate the probes on the unit, adding/ subtracting an offset to/from the value read Screen C8 "Password" This screen is used to change the password to access the screens for setting the parameters. Default PASSWORDS USER = 1234 MAINTENANCE = contact the Service department MANUFACTURER = non-modifiable 5.6 Group D screens Screen D1 "CLOCK SETTING" (USER password) This screen is used to change the date and time. PR GB Subject to Modifications R2-01/

24 Parameter Setting Screens Controller for Row-DENCO 5.7 Group E screens Screen E1 and E2 "MANUAL TEST" (MAINTENANCE password) DRC This screen is used to enable manual unit operation for a maximum time of 30 minutes and manually activate all the resources on the unit. DRX 24 PR GB Subject to Modifications R2-01/2016

25 Controller for Row-DENCO Parameter Setting Screens Screen E3 "Digital input status" and E4 "Digital output status" (MAINTENANCE password) These screens are used to view the status of all the contacts (Inputs E3, Outputs E4) available on the unit control board. 5.8 Group F screens Screen F1 "unit configuration" (MAINTENANCE password) This screen is used to configure the main devices available, humidifier-heaters, optional probes, water flow meter, and to enable unit ON/OFF from remote contact. Installation of the flow meter allows the water flow-rate and coil outlet temperature to be measured. It also displays the instant capacity delivered by the unit. (MANUFACTURER password) This screen is used to configure the type of unit. PR GB Subject to Modifications R2-01/

26 Parameter Setting Screens Controller for Row-DENCO Screen F3 "Setup fan groups/economy mode" (MAINTENANCE password) This screen is used to change the parameters corresponding to operation of the fan (EC): normal operating speed, energy saving speed when the unit is in standby. Standard operation Fan In normal operating conditions, the fan is always operating at the same speed, as set on the user interface during testing. max % min % Set Diff. T outlet C ECONOMY function The ECONOMY function involves lowering fan speed (to a set value) when there are no active control devices (for example when the valve is not active). The purpose is to obtain energy savings, which can be significant if the thermal load of the equipment is distributed to differing extents at more or less the same times. This function can be enabled on the user terminal, on the fan configuration screen. Modulating operation Operation is controlled based on the reading of the outlet air temperature probes, with the following configurations: maximum temperature medium temperature maximum temperature divided between groups 1-2 average temperature divided between groups 1-2 The default values are the following: Cooling set point = 40 C Cooling differential = 5.0 C The cooling set point and differential values can be set on the keypad. 26 PR GB Subject to Modifications R2-01/2016

27 Controller for Row-DENCO Parameter Setting Screens Screen F4 "Fan modulation" (MAINTENANCE password) This screen is used to enable and set the parameters for modulating control of the fan Screen F5 "FAN SPEED configuration" (MAINTENANCE password) This screen is used activate/deactivate and configure the FAN SPEED function with alarms. When a fan alarm or door open alarm is active, the fans can be operated at fixed speed, set by parameter. If an alarm event occurs: the red LED on the alarm button lights up the main screen comes on (green LED) area 2 on the main screen displays the alarm icon, represented by a buzzer area 3 on the main screen displays an icon indicating the cause of the alarm Pressing the alarm button once mutes the audible signal (all the other signals listed above remain active) Screen F6 "Setup valve control" (MAINTENANCE password) This screen is used set the valve control parameters. PR GB Subject to Modifications R2-01/

28 Parameter Setting Screens Controller for Row-DENCO Screen F7 "Adaptive set point" (MAINTENANCE password) Only for chilled water units (DRC): IMPORTANT DRC3036 units are without indirect freecooling management. This screen is used to set and enable the function used to change the chiller set point in low load conditions so as to optimize power consumption. The change is sent to the chiller via a 0 to 10 Vdc analogue signal, depending on the model of chiller. The load in the room is verified by reading the opening of the water valve on the indoor unit. The more closed the valve the lower the load in the room. The controller then tells the chiller to increase its control set point. Increasing the chiller set point has the effect of causing the valve to open further. When the valve is fully open (100%) and the room air temperature exceeds the cooling set point + cooling differential, the controller tells the chiller to decrease the set point. The variation in the chiller set point is not sent constantly but rather based on a set time (Scan time), so as to allow the system to stabilize. A limit temperature (Troom limit) can be established with reference to the room set point (used by the CCU) above which the ADAPTIVE SETPOINT function is disabled. The chiller set point will be immediately set to the default value. This situation may occur if the load increases considerably within the Scan time. The following parameters are defined: Scan time: This is the time expressed in minutes between two successive changes to the chiller set point. This time must be greater than the time the water takes to travel from the chiller outlet to the unit inlet, according to the type of system, volume and water flow-rate. Default value = 5 min Minimum valve position: this is the valve opening value to start increasing the chiller set point. Default value 95% Set Point delta: this is the unit of variation for the set point. Default value 0.5 Vdc Troom limit: this is the room temperature value above which the ADAPTIVE SET- POINT function is disabled. Default value 27 C If the unit is connected in a LAN network, the output logic will be managed by the MAS- TER unit (Unit 01). The ADAPTIVE SETPOINT function, if enabled, will continuously check the opening of the valves on all the units connected to the LAN, and will set the new set point value based on the valve that is most open (i.e. closest to 100%). The MAX Values parameter on the LAN connection configuration screen only activates the ADAPTIVE SETPOINT function if: Chilled water unit "Mean value" function deactivated ADAPTIVE SETPOINT logic active on the MASTER unit (unit 01) 28 PR GB Subject to Modifications R2-01/2016

29 Controller for Row-DENCO Parameter Setting Screens LAN SETUP Units Connected: 2 Mean Values Mode: N Stand-By Mode Y Cycle Time: h 168 Stand-By Limits: N Max Values Mode: N The LAN configuration screen will be as shown here. If dehumidification control is active (both for individual units and units connected in the LAN), if the controller measures a humidity value that requires dehumidification, the chiller set point will be set to the default value Screen F8 "Dew Point control" (MAINTENANCE password) Only for chilled water units (DRC): This screen is used to enable the DEW POINT CONTROL function, so as to prevent formation of condensate on the heat exchanger. If the water temperature approaches the dew point, three possible actions can be taken: Modify chiller set point Close Modulating valve Close on-off valve Modify chiller set point The same output used by the ADAPTIVE SET POINT communicates the change in set point to the chiller, following similar operation. The following parameters are used: Min diff: this is the difference between water temperature and dew point to start increasing the set point. Scan time: this is the time expressed in minutes between two successive changes to the chiller set point. This time must be greater than the time the water takes to travel from the chiller outlet to the unit inlet, according to the type of system, volume and water flow-rate. Limit diff: this is the difference between water temperature and dew point to that resets the function and brings the chiller set point analogue output to zero. Delta setpoint: this is the unit of variation for the set point. PR GB Subject to Modifications R2-01/

30 Parameter Setting Screens Controller for Row-DENCO Close modulating valve/close on/off valve Valve If the water temperature approaches the dew point, with a set delta, opening of the modulating valve or on/off valve can be disabled, so as to deliver less water to the coil and prevent formation of condensate. Twater - Tdewpoint C Valve ON OFF Twater Tdewpoint C Screen F9 "Inverter Function" (MAINTENANCE password) Only for direct expansion units: The use of inverter-driven compressors allows the capacity delivered by the unit to be modulated based on the actual requirements of the load. The logic uses PID control (Proportional Integral Derivative) All the inverter-driven compressor management parameters are configured and tested directly in factory, therefore no parameters need to be set directly on site. Fan modulation can be enabled in combination with compressor modulation by inverter. The purpose is to reduce fan power consumption and consequently increase unit efficiency. The following values are defined. The following values are defined: Minimum speed allowed Maximum speed allowed (equal to rated design speed) 30 PR GB Subject to Modifications R2-01/2016

31 Controller for Row-DENCO Parameter Setting Screens Screen F10 "Condenser management" (MAINTENANCE password) EC Cond fan 100% Max speed For direct expansion (DRX) units only: For DROUD outdoor units, condensing pressure can be controlled according to the diagram. Min speed 0% Cutoff diff Setpoint Diff Cond press. Prevent diff Set Prevent The following parameters can be set: Condensing pressure set point Condensing pressure differential Cutoff differential Speedup Time Prevent set point Prevent differential Screen F11 "Condenser control valve management" (MAINTENANCE password) Valve Cond 100% 100% - Min Speed 100% - Max Speed 0% Diff cutoff Setpoint Diff Diff Press. Cond. Prevent Set Prevent The controller manages condensing pressure by modulating water flow to the condenser, according to the diagram. The parameters are as follows: Enable condenser control Condensing pressure set point Condensing pressure differential Cutoff differential Minimum condenser valve opening Maximum condenser valve opening Maximum opening time Enable pre start function Condenser valve opening with pre start function Pre start function time Enable pre opening function Pre opening set point Pre opening differential Screen F12 "Humidifier configuration" (MAINTENANCE password) This screen is used to configure the parameters corresponding to operation of the humidifier. PR GB Subject to Modifications R2-01/

32 Diagrams Controller for Row-DENCO 6 Diagrams 6.1 Control diagrams The operating logic in cooling and heating is shown in the following diagrams: Direct expansion version with inverter: DRX on R3 on off R2 heating set point off on R1 cooling set point unit with compressor max min set point 1,5 C 1,5 C heating diff. cooling diff. ambient temperature Dual fluid version: DRD on R3 on off R2 heating set point off on R1 cooling set point Chilled water valve opening ramp 100% 0% unit with compressor max min 1,5 C set point 1,5 C ambient temperature heating diff. cooling diff. Details on control are described in the following paragraphs (Group F Screens). 32 PR GB Subject to Modifications R2-01/2016

33 Controller for Row-DENCO Diagrams Chilled water version: DRC Cold water valve 100% 1 circuit version 0% 100% FC 2 circuit version 0% CW set point C 1,5 C coolingdiff. room temperature 6.2 Alarm threshold diagram low room temperature high room temperature high outlet temperature high intake temperature fixed diff. fixed diff. fixed diff. fixed diff. high water temp. circ.1 high water temp. circ.2 fixed diff. fixed diff. risk of condensate formation fixed diff. 6.3 Ambient humidity control diagram humidification set point dehumidification set point 10% DEAD ZONE on low ambient humidity alarm off 100% humidifier 0% off off Cold water valve compressor on on off high ambient humidity on ambient rh% 30% 33% 40% 45% 50% 55% 60% 77% 80% 3% differential 5% differential 5% differential 3% differential PR GB Subject to Modifications R2-01/

34 Operating in Cooling Mode Controller for Row-DENCO 7 Operating in Cooling Mode 7.1 Cooling on chilled water units Valve control logic Valve T intake C Cooling on chilled water units is performed by opening/closing the valve on the cold water coil based on cooling demand, as measured by the air temperature probes, as shown in the diagram. The valve can be controlled based on intake or outlet temperature and based on the maximum or the average temperature value; the corresponding parameters can be set in the "UNIT CONFIGURATION" menu. The control set point will refer to the intake or outlet set point, depending on the selected probe. Control is defined by a PID algorithm; the corresponding parameters can be set in the "REGUL.SETTINGS" menu (Group F Screens) Management of 0-10 V modulating valves These are valves that use a 0-10 Volt modulating signal from the analogue output on the upc control board, to adjust opening from 0% to 100%. The 0-10 Volt electrical signal is directly proportional to the proportional temperature band Management of ON/OFF valves These are normally closed valves that open when powered to allow water to circulate. On this unit in particular, the valves are always powered (therefore open), and are closed in the event where the water in condensate collection basin alarm is active. 7.2 Cooling on chilled water units with two interlaced coils Units with interlaced coils have two completely independent cooling circuits integrated into the same air-conditioner Valve control logic Alarm The main control function involves constant monitoring of the water temperature in circuit 1; if this satisfies the set conditions, then operation is guaranteed, otherwise the unit works using circuit 2. Changeover between circuits occurs following the high water temperature alarm on circuit 1. High water temperature alarm set point T Twater C High water temperature alarm differential = 2 C (cannot be changed) The corresponding parameters can be set in the "ALARMS SETTINGS" menu. When the water temperature is outside of the condition described above, at least 12 minutes must elapse before the unit starts operating using circuit 1 again. This avoids frequent, considerable swings in water temperature and consequently excessively frequent switching between the two circuits. 34 PR GB Subject to Modifications R2-01/2016

35 Controller for Row-DENCO Operating in Cooling Mode When the unit operates using circuit 2, a digital output is activated to control the second cooling source. 7.3 Cooling on direct expansion units Compressor activation times Compressor activation is managed according to the following times: minimum OFF time: 60 seconds minimum ON time: 60 seconds minimum time between consecutive starts: 360 seconds These times coincide with the values typically recommended for scroll compressors. The corresponding parameters can be set in the "REGUL.SETTINGS" menu. The minimum ON time is immediately reset (and consequently ignored) in the event of: alarm on the refrigerant circuit control disabled Enable compressor activation The compressor, when the corresponding cooling stage is required, only starts if the following conditions are true: control is enabled the set compressor times have elapsed no alarms that disable the compressor are active Inverter-driven compressor control ramp management Inverter-driven compressor control ramp management Inverter-driven compressor management uses the following signals: 0-10 VDC analogue output for frequency control digital output to control compressor activation digital Input to monitor the inverter alarm Inverter management inverter ramp The compressor is controlled based on the maximum intake temperature. The control logic uses a ramp generated by a PID algorithm (proportional + integral + derivative); as regards the proportional band, the value is the cooling differential set on the set point screen (default value 1.5 C). The inverter is enabled for operation as soon as the request reaches the minimum ramp for "Min power" control. These are normally closed valves that open when powered to allow water to circulate. On this unit in particular, the valves are always powered (therefore open), and are closed in the event where the water in condensate collection basin alarm is active. cooling ramp PR GB Subject to Modifications R2-01/

36 Operating in Cooling Mode Controller for Row-DENCO The digital contact will then enable the inverter to start, and this will immediately activate the "Startup Hz" value for a time equal to "Start delay". Once this time has elapsed, as the inverter ramp changes the anagogue output will change frequency, according to the trend shown in the graph inverter ramp Fan speed management This function, if enabled, modulates evaporator fan operation, in combination with modulation applied by the inverter. The following values are defined. When enabling the function, the inverter output ramp will be applied to the fan according to the graph: Air flow modulation with Inverter mod Min speed (percentage reduction from design speed) Max speed High and low pressure control Dedicated digital inputs are used to monitor the high and low pressure alarms. The high pressure alarm is activated as soon as the digital contact opens. The low pressure alarm is managed with a bypass time when the compressor starts, and when reaching steady operating conditions. In addition, the protection function must be activated "LP N Retry" times in one hour for the alarm to be activated Discharge suction P control Based on information provided by compressor manufacturers, a function has been defined that monitors the pressure difference between discharge and suction after the compressor starts. Specifically, after a set "Delay Control" time, the pressure difference is monitored to check whether it exceeds the value set for "DeltaP Limit". The alarm is activated if the function is called "Delta N Retry" times in an hour. 36 PR GB Subject to Modifications R2-01/2016

37 Controller for Row-DENCO Operating in Cooling Mode Discharge suction P control at start up Again based on information provided by compressor manufacturers, a function has been defined that monitors the pressure difference between discharge and suction before the compressor starts. The compressor is therefore disabled until the P falls below a certain value and, to help balance pressure, the electronic thermostatic valve is opened 265 steps (default value for manual mode) Discharge pressure control at start up This function, on the other hand, monitors discharge pressure before the compressor starts. The compressor is therefore disabled until the discharge pressure falls below a certain value, as defined by the compressor manufacturers Oil protection This function involves a "Delay start" time that, once elapsed with the compressor operating at low frequency below the value set for "Min frequency" a cycle is completed for a time equal to "Delay stop" at a frequency equal to the value set for "Prot frequency" Discharge temperature control Based on the values declared by the manufacturers, the value of the inverter-controlled compressor discharge temperature is controlled. If the value is above a WARNING level, the frequency value is kept constant, even if the controller requires a higher frequency. If the temperature continues to rise and reaches a second limit, called PROTECTION, the frequency is reduced in steps of 10 Hz at 3 minute intervals, and the display will signal the condition. If the temperature increases even further, reaching the SHUTDOWN value, then the compressor will be stopped and an alarm with manual reset will be activated Envelope control This function uses the discharge and suction pressure probes. The control diagram is established based on information from the manufacturer of the compressor, and features certain operating areas inside which the compressor can work without restrictions, and other areas where the following actions are required: set a new field of control frequencies available stop the compressor Compressor operating range definition The envelope control function has the task of precisely determining the operating point within a series of convex polygons, identified by suction pressure and discharged pressure. By entering the coordinates of 18 points, 28 polygons can bedefined, grouped into 8 areas. PR GB Subject to Modifications R2-01/

38 Additional Functions Controller for Row-DENCO 8 Additional Functions 8.1 Minimum outlet temperature limit function The purpose of this function is to define a minimum limit for the outlet temperature value when equipment sensitive to relatively low temperatures is located near the airconditioner outlet. The default values are as follows: Minimum outlet set point = 10 C Minimum outlet differential = 4 C (cannot be changed) The value of the Minimum outlet set point can be modified from the keypad. 8.2 Dehumidification function Dehumidification on direct expansion units On direct expansion units, activation of dehumidification mode involves activation of the refrigerant circuit at full capacity, with a modified superheat set point Dehumidification on chilled water units On chilled water units, activation of dehumidification mode involves the complete opening of the cold water valve Dehumidification limits When dehumidification operation is activated, to avoid losing temperature control, temperature limits are monitored; above and below these limits dehumidification operation is deactivated. For DX units, dehumidification is deactivated when the temperature falls below the temperature limit defined by parameter "lim_min_troom_deum". Direct expansion unit with ON/OFF compressors: 22 C Direct expansion unit with inverter-controlled compressors: 20 C 38 PR GB Subject to Modifications R2-01/2016

39 Controller for Row-DENCO Additional Functions 8.3 Power transducer function A power converter is used to measure the main electrical variables. In the Unit Configuration menu, the power transducer can be enabled; on activation the controller makes a number of settings: correct communication speed transformation ratio type of system (single-phase or three-phase) Before enabling the transducer, all the electrical connections need to be completed correctly, as shown on the unit s wiring diagram. When the function is enabled, a screen is displayed showing progress of the parameter settings; if the configuration procedure is completed successfully, the screen shows Programming OK (Esc), otherwise it shows Check Connections (Esc). In both, to return to the previous screen, press ESC. If configuration is completed correctly, special screens are enabled in the main loop for viewing the electrical parameters measured and resetting the energy counters, protected by maintenance password. The power transducer alarm signal indicates that communication is interrupted or that there are communication errors. The following variables are displayed: concatenated voltage (phase-phase), for three-phase units onlyphase voltage (phase-neutral) phase current neutral current, for three-phase units only active phase power, for three-phase units only total active power active energy PR GB Subject to Modifications R2-01/

40 Alarm Event Controller for Row-DENCO 9 Alarm Event 9.1 Serious/minor alarm The software also allows alarms to be defined as serious (unit shutdown) or minor (signal only on the display). The following table shows the alarms with the corresponding default value: Display Icon Alarm Serious/Minor Unit Pressure difference Minor DRX Control envelope polygon inconsistent Minor DRX Inverter-driven compressor envelope Minor DRX Compressor inverter Minor DRX Fire/smoke alarm Serious Water in the condensate collection basin Minor Risk of condensate formation Minor DRC Fan 1/2/3/4 disconnected Minor Flow alarm Minor DRC/DRX High compressor discharge temperature alarm Minor DRX High pressure Minor DRX Frost protection alarm Minor DRX Low pressure Minor DRX Electronic thermostatic valve Minor DRX Electric heater thermal protector Minor DRC/DRX No mains power Minor DRC Dirty filter alarm Minor DRC/DRX Humidifier generic alarm Minor DRC/DRX Humidifier water drain alarm Minor DRC/DRX Humidifier cylinder lifetime alarm Minor DRC/DRX Humidifier offline alarm Minor DRC/DRX Humidifier high current alarm Minor DRC/DRX 40 PR GB Subject to Modifications R2-01/2016

41 Controller for Row-DENCO Alarm Event Display Icon Alarm Serious/Minor Unit Humidifier no water alarm Minor DRC/DRX Humidifier low current alarm Minor DRC/DRX EEPROM fault Serious Door open Minor Compressor discharge temperature probe Minor DRX Circuit 2 water temperature probe fault Minor DRC Circuit 1 water temperature probe fault Minor DRC Outlet air temperature probe 1/2/3/4 Minor Intake air temperature probe 1/2/3/4 Minor Room temperature probe Minor Room humidity probe fault Minor plan alarm Minor DRC/DRX High outlet air temperature Minor High intake air temperature Minor High room temperature Minor Low room temperature Minor High room humidity Minor Low room humidity Minor High water temperature, circuit 2 Minor DRC High water temperature, circuit 1 Minor DRC Power transducer alarm Minor Expansion alarm Minor Incorrect password (5 attempts) Minor Maintenance Minor The options for each alarm are N (NOT serious or minor) and Y (SERIOUS alarm). The various icons will be displayed depending on the unit configuration. PR GB Subject to Modifications R2-01/

42 Alarm Event Controller for Row-DENCO 9.2 Reset alarm status For alarm RESET, there are two different types of alarms: For alarms that are reset automatically or manually based on the setting made on the user terminal (screen A4 in the tree diagram); this category includes the following alarms: exceeding room temperature limits, exceeding room humidity limits, high water temperature; by default, all these alarms have automatic RESET. For alarms that must be RESET manually: after having resolved the cause of the alarm, the alarm button must be pressed for several seconds: if the cause of the alarm has effectively been resolved, areas 3 and 4 will no longer show the type of alarm icons respectively. In regards to the incorrect password alarm, the alarm is reset manually only after having entered the MAINTENANCE password, and having accessed the settings menu screen. Password alarm reset procedure: Press the PRG button and enter the Maintenance password. Then press and hold ESC for 5 seconds to reset the alarm. The following table shows all the possible alarms available and the default values: Display Icon Alarm Automatic/Manual Unit Pressure difference Manual DRX Control envelope polygon inconsistent Automatic DRX Inverter-driven compressor envelope Automatic DRX Compressor inverter Manual DRX Fire/smoke alarm Manual Water in the condensate collection basin Automatic Risk of condensate formation Automatic DRC Fan 1/2/3/4 disconnected Automatic Flow alarm Manual (not selectable) DRC/DRX High compressor discharge temperature alarm Manual DRX High pressure Manual DRX Frost protection alarm Manual DRX Low pressure Manual DRX Electronic thermostatic valve Manual DRX Electric heater thermal protector Manual DRC/DRX No mains power Automatic DRC Dirty filter alarm Automatic DRC/DRX Humidifier generic alarm Automatic DRC/DRX Humidifier water drain alarm Automatic DRC/DRX 42 PR GB Subject to Modifications R2-01/2016

43 Controller for Row-DENCO Alarm Event Display Icon Alarm Automatic/Manual Unit Humidifier cylinder lifetime alarm Automatic DRC/DRX Humidifier offline alarm Automatic DRC/DRX Humidifier high current alarm Automatic DRC/DRX Humidifier no water alarm Automatic DRC/DRX Humidifier low current alarm Automatic DRC/DRX EEPROM fault Manual (not selectable) Door open Automatic Compressor discharge temperature probe Automatic DRX Circuit 2 water temperature probe fault Automatic DRC Circuit 1 water temperature probe fault Automatic DRC Outlet air temperature probe 1/2/3/4 Automatic Intake air temperature probe 1/2/3/4 Automatic Room temperature probe Automatic Room humidity probe fault Automatic plan alarm Automatic DRC/DRX High outlet air temperature Automatic High intake air temperature Automatic High room temperature Automatic Low room temperature Automatic High room humidity Automatic Low room humidity Automatic High water temperature, circuit 2 Automatic DRC High water temperature, circuit 1 Automatic DRC Power transducer alarm Automatic Expansion alarm Automatic PR GB Subject to Modifications R2-01/

44 Alarm Event Controller for Row-DENCO Display Icon Alarm Automatic/Manual Unit Incorrect password (5 attempts) Manual (not selectable) Maintenance Automatic (not selectable) 44 PR GB Subject to Modifications R2-01/2016

45 Controller for Row-DENCO LAN 10 LAN 10.1 LAN local network management Purpose of the LAN Connecting the units (i.e. the control boards fitted on each unit) in a plan network offers the possibility to perform the following functions: control up to 10 DRC/DRX units from just one user terminal (shared user terminal) Preliminary operations Introduction Firstly, the control board must be able to support network connection to other units, both from a hardware and software point of view (board BIOS). The control boards that run the application described in this document all support this function without needing to add any accessory electronic cards. In addition, the BIOS loaded on the board is already configured to manage a local network connection, and therefore: cyclically checks the hardware (on the local board) required for network communication and/or the corresponding settings (for example, the network address, which must not be 0) cyclically checks the connection status of the local unit to the rest of the LAN cyclically runs a global check on the rest of the LAN visible to the unit in question In order to operate the units correctly in a LAN, the following operations need to be performed. PR GB Subject to Modifications R2-01/

46 LAN Controller for Row-DENCO Network wiring The description of network wiring is not within the scope of this document; if necessary refer to the controller user manual or a specific manual on the LAN. Below are simply some theoretical references to the structure of the network. All the control boards that are part of the local network are connected together in a bus layout (=plan bus). Shielded cable for connecting the units is the INSTALLER'S RESPONSIBILITY RX/TX- RX/TX+ GND RX/TX- RX/TX+ GND RX/TX- RX/TX+ GND UNIT No... UNIT No. 2 UNIT No. 1 Fig. 10-1: User interface The user terminals can be connected either to the main bus or alternatively, and more conveniently, connected directly to the board. This is because each control board, when it's turn comes, sends the network variables to the other control boards in the LAN. In addition, each control board constantly sends data for managing the display to its own private user terminal and the shared terminal. As quite a lot of data is needed to manage the display (above all when this includes graphic icons), a line (i.e. the bus) is reserved solely for sending the variables, and where featured for managing the shared terminal, while private terminals are managed over a direct (dedicated) connection between the user terminal and the corresponding control board, so as to not slow down overall transmission speed on the network. 46 PR GB Subject to Modifications R2-01/2016

47 Controller for Row-DENCO LAN Configuring the Network Network software configuration substantially involves assigning the terminals available (maximum three) to each PCO board connected to the LAN. Each board can in fact communicate at most with three user terminals, therefore the addresses of the three terminals need to be specified for each board, along with the attribute (private/shared): private: the terminal in question always and only communicates with that board shared: the terminal in question communicates with all the boards in the network as established at a software application level Configuration can be performed manually, following a procedure that depends on the type of user terminal, or automatically, i.e. at a software application level by assigning suitable system variables. As this software application features automatic configuration, this phase does not require any operations to be performed manually. Configuration involves assigning the following values: Unit Address Unit Model Terminals Managed 1 DRC/DRX 11 (private), 32 (shared) 2 DRC/DRX 12 (private), 2 (shared) 3 DRC/DRX 13 (private), 32 (shared) 4 DRC/DRX 14 (private), 32 (shared) 5 DRC/DRX 15 (private), 32 (shared) 6 DRC/DRX 16 (private) 2 (shared) 7 DRC/DRX 17 (private) 2 (shared) 8 DRC/DRX 18 (private) 2 (shared) 9 DRC/DRX 19 (private), 32 (shared) 10 DRC/DRX 20 (private), 32 (shared) (private), 32 (shared) (private), 32 (shared) (private), 32 (shared) (private), 32 (shared) (private), 32 (shared) Address Setting Setting the control board address The control board address can only be set if the user terminal address is 0. Once the terminal address has been set to 0, power down the board and power it up again while pressing the ALARM and UP buttons together: wait until the screen for setting the board address is shown, then release the buttons and set the correct address. Setting the user terminal address The terminal address can only be set after having powered the terminal via the phone connector J10 for the PCO controller and J7 for the controller; the default value is 32. To enter configuration mode, press UP-DOWN-ENTER together for at least 5 seconds; a screen will be displayed with the cursor flashing in the top left corner: to modify the terminal address (display address setting), press ENTER once: the cursor will move to the address field (nn) use the UP and DOWN buttons to select the desired value, and confirm by pressing ENTER: the value will be saved to permanent memory on the terminal If NO LINK is displayed on the user terminal, this is not communicating with any device and consequently there is a problem with the user terminal or board address setting. PR GB Subject to Modifications R2-01/

48 LAN Controller for Row-DENCO 10.2 LAN network functions All the settings corresponding to the LAN can be made starting from the settings menu and accessing (second row) the branch of LAN/serial configuration screens. All the parameters can be set on the MASTER unit only (that is, the unit with address 1), which automatically sends any changes to all the other units in the network. The following figure shows screen B1 with the main LAN settings. LAN Setting Units Connected: 5 Mean Values Mode: N Stand-By Unit: Y Cycle Time: h 120 Stand-By Units: 1 Stand-By Limits: Y Max Values mode: N Units Connected: number of units connected in the LAN Mean Values Mode: enable control based on the average readings Stand-By Unit: enable the standby unit and rotation Cycle Time: time between one rotation of the units and the next (in other words: time the unit remains in standby) Stand-By Units: number of units in standby; only shown if "Units Connected" >=4 Stand-By Limits: enable the function for starting the standby unit when the ambient temperature and humidity limits have been exceeded. Max Values mode: enable control of valve opening for the ADAPTIVE SETPOINT function (chilled water units only) Management of average temperature and humidity Calculation of the average Enabling use of the average reading When the units are connected in a LAN this network connection can be exploited to have them operate based on the average temperature and humidity of all the readings made on the active units (fan operating) without alarms. The average is calculated by the MASTER unit (the unit with plan address 1) only if control based on the average values has been enabled on the user terminal. The MASTER unit, to perform this calculation, receives the temperatures and humidity values read by the probes on all the units connected in a LAN, calculates the average and then sends the resulting value to all the units. The average temperature and humidity is only calculated on the readings from the units that: are not in standby (if the rotation of the standby unit is enabled) do not have a SERIOUS ALARM (see the following paragraphs) have not been switched off from the user terminal The use of the average temperature and humidity value for control is only enabled if: the function is enabled there are no problems in the LAN network connection When problems are detected in the LAN, the unit immediately disables control based on the average values and works with the local values (that is, the values read by the probes on the unit itself). 48 PR GB Subject to Modifications R2-01/2016

49 Controller for Row-DENCO LAN Management of the standby unit Management of the rotation function In an installation made up of units that are operating and units in standby, the operating hours of the units will not be equal, as the former will be operating for longer than the latter, which are off. To overcome this problem the plan network can rotate the operation of the units, balancing the operating hours. Rotation places a unit that is on in standby and starts the unit that is in standby. Rotation of the standby unit is managed entirely by the unit with address 1 (in this case, the MASTER, while all the others are SLAVES) and is performed based on times, starting from the unit with the lowest address, that is, the unit with address 1, and then progressively incrementing the address. Two standby units can be set, however only if there are at least four units connected in the LAN; in this case, rotation of the units in standby starts with the first two (addresses 1 and 2), then the second two (2 and 3) and so on. If the rotation time is set to zero, from that time on rotation will no longer be performed, consequently the same unit remains in standby, and is only activated in the event of faults and alarms, as described in the following paragraphs. As regards the differentials, these coincide with the values set for normal control Configuring the software for unit recognition and management Displaying network status (NetSTAT) Pressing UP+DOWN+ENTER together for at least 10 seconds (only in plan mode) displays the network overview screen as seen from the user terminal in question. This screen shows the status of the plan network, displaying how many and which devices are connected and what their addresses are. Pressing UP/DOWN displays the firmware version on the terminal. To exit the NetSTAT procedure press ENTER Shared user terminal The shared user terminal (address 32) is managed by the application as follows: Normally it displays information relating to the unit selected by the user by pressing ESC and ALARM together: each time the buttons are pressed the address of the unit displayed is increased by one. In the event of an alarm or maintenance signal on any of the units connected in a LAN, the user terminal automatically switches to the unit in question, so that the event can be signalled. Physically, the shared terminal can be connected to any of the boards in the network; in addition, it can be connected either on the air-conditioning unit (panel-mounted terminal) or in a remote position (wall-mounted terminal). PR GB Subject to Modifications R2-01/

50 Connection to the remote terminal from the board Controller for Row-DENCO 11 Connection to the remote terminal from the board This configuration requires: 1: the use of two 'T' shunts: one fitted on the unit and one near the remote terminal 2: the use of the 3x2 shielded cable, so that the power to the remote terminal is also supplied by the board on unit 1, connected using the 'T' shunt 3: near the terminal, insert the ferrite to reduce any electromagnetic disturbance Remote terminal no. 32 Board no. 1 J17 Three-pair cable pairs with 6-pin telephone connector J11 Three-pair shielded cable: 3 x 2 x AWG 24 (six lead cable with shield and twisted pairs, AWG24, resistance < 80 ohm/m). Remote terminal no. 32 Board no. 1 Term. Term. no. 11 Maximum distance between terminal/board: 200 m Fig Ferrite Connections for the 2 x 2 x AWG24 CABLE (for connecting the remote terminal: without transferring the power supply) Terminal Function Cable connections 0 Earth Shield 1 + VRL 30Vdc 2 Gnd First pair 3 Rx/Tx - Second pair 4 Rx/Tx + Second pair 5 Gnd First pair 6 + VRL 30Vdc 50 PR GB Subject to Modifications R2-01/2016

51 Controller for Row-DENCO Connection to the remote terminal from the board 11.1 Electrical connections Terminals A B C pin strips The electrical connections must be completed when the units are off and disconnected from the power supply. The network can have different configurations, according to the maximum distance of the connections between the boards and the remote terminal; for the connections between the remote terminal and the main board, a 'T' shunt may be required, as shown in the drawing. Terminal Function 0 Earth 1 + VRL 30Vdc 2 Gnd 3 Rx/Tx - 4 Rx/Tx + 5 Gnd 6 + VRL 30 Vdc If both the pin-strip jumpers are installed between 2 and 3 the flow of current is interrupted between the connectors separated by the dashed line. If power is required on all the connectors, both the jumpers must be installed between 1 and 2. Terminal 0 is an auxiliary terminal and can be used to earth the shield of the cable; the 'T' shunt must in any case be connected to a metallic part of the unit that is already earthed 11.2 Maximum distance between the terminal and the board 1: For local terminals the connection to the main board is already made using a 3-pair cable and 6-pin telephone connector. The length of this cable generally does not exceed 3 metres. 2: The remote terminals can be connected to the main board using the type of telephone cable described in point 1, with a maximum distance of 50 metres. 3: For greater distances, up to a maximum of 200 metres, a shielded cable must be used (six lead cable with shield and twisted pairs, AWG24, resistance < 80 ohm/m). The cable may have 3 or 2 pairs, depending on whether the power needs to be supplied to the terminals. This cable is not supplied by DencoHappel. AWG24 cables with two twisted pairs plus shield, such as the Belden 8723 or 8102, are recommended Displaying the network from the terminal From any terminal in the network, holding the UP + ENTER + DOWN buttons for at least 10 seconds, will display the << NetSTAT >> screen (see Fig. 11-2). The NetSTAT screen shows all the LAN boards and all the terminals connected in the network, including the shared remote terminal, with the corresponding addresses. In the example, the network is made up of 3 LAN boards with addresses 1, 2, 3, and 4 user terminals with addresses 11, 12, 13 and 32. board terminal NetSTAT T:11 Enter To Exit board with address terminal with address 11 terminal with address 32 Fig PR GB Subject to Modifications R2-01/

52 Serial Boards and Supervisory System Controller for Row-DENCO 12 Serial Boards and Supervisory System 1) Options and serial boards currently available Note! This part is not intended to go into detail on the various versions and options available in the DencoHappel range as regards supervisory systems, a topic that will be dealt with in a seperate manual. Rather, the purpose is to provide a rapid indication of the operations to be performed on the unit software by setting parameters from the user terminal so as to activate the database on the controller. Therefore below is a short list of the operations to be carried out for the management of a serial interface board, in particular: 1: Options and serial boards currently available 2: Installation 3: Configuration of the software from the terminal 4: Configuration/Physical development of the serial network The interfacing and sharing of the control variables with such systems can be performed using serial boards/interfaces that are compatible with the BMS that the variables should be exchanged with. Consequently, the various OPTIONS that can be ordered when purchasing the unit (and can also be supplied subsequently) include the following serial interface boards: RS485 for dialogue with protocol: MODBUS ETHERNET for dialogue with protocols: SNMP and TCP/IP and BACNET LON for dialogue with protocol: LON LON Fig RS485 MODBUS BOARD ETHERNET/BACNET BOARD LON BOARD 2) Installation Motherboard These serial interface boards must be fitted onto the motherboard, in the special slot shown in Fig Serial card slot Fig PR GB Subject to Modifications R2-01/2016

53 Controller for Row-DENCO Serial Boards and Supervisory System Assembly ATTENTION Danger of damage due to static discharge! Precautions when handling the board Electrical damage may occur to the electronic components as a result of electrostatic discharges from the operator. Suitable precautions must be therefore be taken when handling these components, specifically: Before handling any electronic component or board, touch an earthed object (avoiding contact with a component is not sufficient, as a 10,000 V discharge, a voltage that can easily be reached by static electricity, creates an arc of around 1 cm). The materials must remain as long as possible inside their original packages. If necessary, remove the board from the packing and then place the product in antistatic packaging without touching the rear of the board. Always avoid using plastic, polystyrene or non-antistatic sponge materials. Always avoid passing the board between operators (to avoid the phenomena of electrostatic induction and consequent discharges). Insert the optional board in the corresponding plug-in connector, making sure that the board is properly fitted and rests against the two plastic supports on the motherboard case. Connection to the RS485 network is made using the plug-in terminal connector on the board. The meanings of the pins on this connector (Fig. 12-3) are marked by the screen printing on the board, as listed in the table Pin Meaning 1 GND 2 R X+/TX+ 3 R X-/TX- Abb. 12-3: 2) Configuration of the software from the terminal If the board is in the last position on the supervisor serial line, a 120-1/4 W termination resistor should be fitted between pins 2 and 3 to closed the line. Obviously, only one board can be fitted at a time on the motherboard. Consequently, the air-conditioner can only communicate with one type of BMS at a time. Once the board has been installed, it must be set with the address and configured as described below. This operation then needs to be repeated for each individual unit where the serial board has been installed. Access screen B1 on the user terminal: the following parameters need to be set. Unit Id: Serial address of the unit (this address does not relate to the LAN address). The address will be sent via serial link as the unit identifier, therefore the serial network cannot have more than one unit with the same address. Baud Rate: This refers to bits per second: the value set must be congruent with the type of serial link used. For further information contact the proprietor of the system Protocol: Selectable (only with RS485 card installed) between STD, MODBUS, LON depending on the card installed Serial ON/OFF: Set to "Y" allows the unit to be switched on or off by the BMS. PR GB Subject to Modifications R2-01/

54 Serial Boards and Supervisory System Controller for Row-DENCO 4) Physical configuration/development of the serial network Note! The configuration and development of the network depend closely on the type of BMS interface used. As a result, contact the proprietor of the supervisory system directly. DencoHappel personnel will not develop serial networks on their own initiative and cannot be held liable for the incorrect development of such not for any damage that may derive. MODBUS SERIAL SETUP Unit ID: 001 Baud Rate: Protocol: MODBUS * Serial ON/OFF: Y * For Modbus protocol, the other fundamental non-modifiable parameters are: Data Bits: 8 Stop Bits: 2 Parity: NONE LON SERIAL SETUP Unit ID: 001 Baud Rate: Protocol: LON Serial ON/OFF: Y pcoweb Ethernet Bacnet RS2 SERIAL SETUP Unit ID: 001 Baud Rate: Protocol: STANDARD Serial ON/OFF: Y 54 PR GB Subject to Modifications R2-01/2016

55 Controller for Row-DENCO Alarm Event 13 Alarm Event Description Unit UOM Lev. MAIN LOOP Outlet air temp. set point C 1 Outlet air temp. differential C 1 Intake air temp. set point C 1 Intake air temp. differential C 1 Fan operating hour threshold h 2 Compressor operating hour threshold h 2 ALARM PARAMETER LOOP High intake air temperature set point C 2 High outlet air temperature set point C 2 High water temperature set point DRC C 2 High room temperature set point C 2 Low room temperature set point C 2 High room humidity set point %RH 2 Low room humidity set point %RH 2 Output A status flag 1 Output B status flag 1 Output B status num 1 EEPROM alarm output A/B num 1 Maintenance alarm output A/B num 1 Fan alarm output A/B num 1 Flood alarm output A/B num 1 High intake T. alarm output A/B num 1 High outlet T. alarm output A/B num 1 Intake T. probe alarm output A/B num 1 Outlet T. probe alarm output A/B num 1 Door open alarm output A/B num 1 High water T. alarm output A/B DRC num 1 Water T probe alarm output A/B DRC num 1 High water T. 2 alarm output A/B DRC num 1 Water T. probe 2 alarm output A/B DRC num 1 Fire-smoke alarm output A/B num 1 Flow alarm output A/B DRC,DRX num 1 Filter alarm output A/B DRC,DRX num 1 LAN alarm output A/B DRC,DRX num 1 High air T. alarm output A/B num 1 Low air T. alarm output A/B num 1 High air RH alarm output A/B num 1 Low air RH alarm output A/B num 1 Condensate alarm output A/B DRC num 1 Air T. probe alarm output A/B num 1 Air RH probe alarm output A/B num 1 High pressure alarm output A/B DRX num 1 Low pressure alarm output A/B DRX num 1 Thermostat valve alarm output A/B DRX num 1 Inverter alarm output A/B DRX num 1 Envelop alarm output A/B DRX num 1 Inconsistency alarm output A/B DRX num 1 Pressure delta alarm output A/B DRX num 1 Expansion output A/B DRX num 1 No mains power alarm output A/B DRC num 1 PR GB Subject to Modifications R2-01/

56 Alarm Event Controller for Row-DENCO Description Unit UOM Lev. LOOP PARAMETER SERIAL/LAN Unit supervisor address num 2 Supervisor communication speed baud 2 Communication protocol num 2 Enable ON from supervisor flag 2 Number of units connected to LAN DRC,DRX num 2 Enable average temperature DRC,DRX flag 2 Enable unit in STBY DRC,DRX flag 2 Unit rotation time in STBY DRC,DRX h 2 Number of units in STBY DRC,DRX flag 2 Enable unit activation for temp. DRC,DRX flag 2 Unit activation set point for temperature DRC,DRX C 2 ADVANCED PARAMETER LOOP Intake air temperature probe 1 offset C 2 Intake air temperature probe 2 offset C 2 Intake air temperature probe 3 offset C 2 Intake air temperature probe 4 offset C 2 Outlet air temperature probe 1 offset C 2 Outlet air temperature probe 2 offset C 2 Outlet air temperature probe 3 offset C 2 Outlet air temperature probe 4 offset C 2 Water inlet temperature probe offset DRC C 2 Water inlet temperature probe 2 offset DRC C 2 Air temperature probe offset C 2 Air humidity probe offset %RH 2 Water outlet temperature probe offset C 2 Water flow-rate probe offset DRC m 3 /h 2 Water outlet temperature probe 2 offset C 2 Water flow-rate probe 2 offset DRC m 3 /h 2 Compressor suction temperature probe offset DRX C 2 Compressor low pressure probe offset DRX bar 2 Compressor high pressure probe offset DRX bar 2 Password 1 level 1 num 1 Password 2 level 1 num 1 Password 3 level 1 num 1 Password 4 level 1 num 1 Password 1 level 2 num 2 Password 2 level 2 num 2 Password 3 level 2 num 2 Password 4 level 2 num 2 56 PR GB Subject to Modifications R2-01/2016

57 Controller for Row-DENCO Alarm Event Description Unit UOM Lev. CONFIGURATION PARAMETER LOOP Enable water probe flag 2 Enable water flow meter flag 2 Enable air temperature probe flag 2 Enable air humidity probe flag 2 Enable remote ON/OFF flag 2 Enable fire/smoke sensor flag 2 Enable dirty filter sensor flag 2 Enable flood sensor DRC,DRX flag 2 Enable 2nd 230V power source DRC flag 2 Enable group 2 fans flag 2 Intake/outlet fan control probe flag 2 Control value num 2 Group 1 fan speed % 2 Group 2 fan speed % 2 Enable economy function flag 2 Economy function fan speed % 2 Enable fan modulation flag 2 Minimum group 1 fan speed % 2 Minimum group 2 fan speed % 2 Enable fan speed with fault flag 2 Fan speed with fault % 2 Enable fan speed with door open flag 2 Fan speed with door open % 2 Intake/outlet control probe flag 2 Control value num 2 Fan modulation on compress. frequency DRX flag 2 Condenser control DRX flag 2 Condenser control set point DRX bar 2 Condenser control differential DRX bar 2 Condenser control cut-off DRX bar 2 Minimum condenser fan speed DRX % 2 Maximum condenser fan speed DRX % 2 Condenser fan start up time DRX s 2 Enable high pressure prevention DRX flag 2 High pressure prevention set point DRX bar 2 High pressure prevention differential DRX bar 2 Enable dynamic chiller set point DRC flag 2 Maximum opening for dynamic set point DRC % 2 Scan time for dynamic set point DRC min 2 Dynamic set point room temperature limit DRC C 2 Dynamic set point increase analogue output DRC C 2 Enable dew point control modulating ver. DRC flag 2 Enable dew point control on/off ver. DRC flag 2 Enable dew point control with dyn. set point DRC flag 2 Max H2O-air temp. diff. dyn. set point DRC C 2 Dew point scan time with dynamic set point DRC min 2 H2O-air temp. diff. limit dyn. set point DRC C 2 Dew point increase an. output dyn. set point DRC C 2 PR GB Subject to Modifications R2-01/

58 Alarm Event Controller for Row-DENCO Troubleshooting is simplified by the information provided by the microprocessor controller: if an alarm is signalled, refer to the control panel instruction manual. If required, contact the nearest service centre, indicating the probable causes of the fault. Fault Cause Solution AIR-CONDITIONER DO- ESN'T START ROOM TEMPERATURE TOO HIGH ROOM TEMPERATURE TOO LOW LOW OR NO AIR FLOW The electrical panel is not powered The auxiliary circuits are not powered The electrical panel is not powered The parameter settings on the microprocessor controller are not correct The air flow-rate is too low or null The probe isn't working Thermal load higher than expected Three-way valve not working No flow of chilled water High temperature of the chilled water The parameter settings on the microprocessor controller are not correct The three-way valve in the chilled water circuit is stuck in the open position The fans are not powered Obstructions to the flow of air The fan thermal cutout has tripped Excessive pressure drop in the air distribution system Check for voltage Check that the circuit breaker IM on the auxiliary circuits is armed. Check the fuse on the main board Check for DC power See the controller manual See "LOW OR NO AIR FLOW" Check the electrical connections and the configuration of the controller Check the thermal load in the space being air-conditioned Check the electrical connections to the valve servomotor. Open the valve using the manual control knob Check for the flow of chilled water; check that any on-off valves outside of the unit are open Check operation of the water chiller See the controller manual Close the valve using the manual control knob and replace the servomotor Check the power supply to the fans Check Check the resistance of the fan windings; after resetting, measure the voltage and power consumption Make sure the air distribution system is sized correctly 58 PR GB Subject to Modifications R2-01/2016

59 Controller for Row-DENCO Notes PR GB Subject to Modifications R2-01/

60 DencoHappel is a globally operating company with great expertise in air treatment, air conditioning and filtration technology. Our nearest consulting and service teams will be glad to discuss ideas and develop creative and effective solutions with you.