TELLUS. Complete HVAC substation for air handling, cooling, heating and hot tap water. Main advantages. General

Transcription

1 Complete HVAC substation for air handling, cooling, heating and hot tap water Text and figures in red are preliminary and may be adjusted General TELLUS is a complete, modular substation that can be installed both indoors and outdoors. TELLUS produces and distributes all necessary tempered air, cooling energy, heating energy and hot tap water. When all the modules are integrated, this ensures optimum control and interactive dynamic energy recovery. TELLUS is extremely space-efficient and is available with a 5-year warranty. The unit produces demand-controlled tempered air, heating and cooling, simultaneously or independently of each other. TELLUS is adapted for regions with a warm climate up to +45 C and/or a cold climate down to -20 C. Main advantages With a single supplier for the entire ventilation system, problems associated with the division of responsibility and communication difficulties between different parties are avoided. Easy to size, install and connect thanks to the great flexibility of the modular concept. Can be supplied as a single unit or as several smaller modules. Reliable and easy to maintain. Significant energy savings through demand-controlled temperatures and flows. TELLUS is always sold with commissioning and connection, and can be obtained with a 5 year warranty. 1

2 Contents Overview...3 Energy efficiency above expectations...3 TELLUS, the heart of the system solution...6 Description of the unit...7 General...7 Mechanical design...8 Electrical and control equipment Sizing, dimensions and weights...15 TELLUS (with recirculation) TELLUS (without recirculation) Software and resources Description of the functions...22 Control...22 Temperature regulation, air handling...23 Temperature regulation of cooling and heating water...27 Temperature regulation, hot tap water...29 Flow/pressure, air handling...30 Air recirculation section...31 Filters...33 Airflow adjustments...33 Rotary heat exchanger...34 Heating...35 Cooling...38 Moisture in supply and extract air...40 Damper...40 Readings...40 Manual test...40 Alarm settings, air handling module Alarm Communication...42 Logging function...42 Other external operating functions...43 IQnomic Plus...43 Defrosting...44 Chiller and heat pump module...44 Swegon Solutions...45 SuperWise...45 Complements and accessories...46 Outdoor installation...46 Specifications...47 Tender and calculation...47 FAQ...48 Notes

3 Overview TELLUS produces and distributes all necessary tempered air, cooling energy, heating energy and hot tap water. When all the modules are integrated, this ensures optimum control and interactive dynamic energy recovery. The unit produces demand-controlled tempered air, heating and cooling, simultaneously or independently of each other. TELLUS is adapted for regions with a warm climate up to +45 C and/or a cold climate down to -20 C. Air handling module Energy exchange module Hydronic module Chiller & heat pump module TELLUS Energy efficiency above expectations Optimum performance is best achieved through an integrated system. TELLUS has achieved this with a really simple, compact and modular solution. The outdoor air is heated or cooled with a highly effective, rotating heat exchanger, and then further cooled or heated as required. This additional energy is supplied by the Chiller & heat pump module, via the demand-controlled Hydronic module. The additional energy for this is obtained from the Energy exchange module. The energy exchange module's fan energy can be reduced by 25 50% compared to a solution with separate components, thanks to the recovery of extract air. In the winter, the extract air is also used to raise the temperature in the Energy exchange module and to raise the temperature in the cold water tank in order to improve the efficiency of the Chiller and heat pump module. The airflow, supplied heating and cooling energy, as well as hot tap water, can be fully demand-controlled. During periods when there is a need for simultaneous heating and cooling, the smaller amount (heating or cooling) is produced solely from surplus energy, as is the case with hot tap water when there is a simultaneous need for cooling. Number of hours between +5 C* and +15 C* = need for simultaneous heating and cooling Number of hours above +10 C* = free hot tap water energy * Outdoor temperature Hours per year with additional energy saving due to integrated energy production Stockholm Stuttgart Lisbon (37 %) (44 %) (40 %) (38 %) (47 %) (92 %) 3

4 Overview B A C H G I D F E Diagram shows left-hand version Dimensions, measurements and weights Size Cooling capacity kw Heating capacity kw Min. airflow m 3 /s (m 3 /h) Nominal airflow m 3 /s (m 3 /h) Max. airflow m 3 /s (m 3 /h) Power supply Amount of refrigerant kg M-value 1 At different outdoor temperatures +25 C +10 C -5 C 40* ,2 (720) 0,8 (2 800) 2,1 (7 500) 3-phase, 400 V, 35 A 5, ,2 (720) 1,2 (4 250) 3,0 (10 800) 3-phase, 400 V, 50 A 8 4,2 10,4 7,9 80* ,2 (720) 1,6 (5 670) 4,4 (15 800) 3-phase, 400 V, 63 A ) Annual energy quota for all extracted heating and cooling energy kw/external energy kw, for various outdoor temperatures. Size A B C D E F Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 40* * Size G H I Weight with Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) liquid kg 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) Weight without liquid kg 40* * *) Preliminary data, first delivery during

5 Overview Available energies Based on the design outdoor temperature. When the cooling requirement is the sizing factor Outdoor temp. ( C) Relative humidity [RH %] Max. airflow [m 3 /s] Available cooling [kw] 1 Available heating [kw] 3 Available hot tap water [l](after hours of charging) Max 4 (50 C) Temp. cooling medium at outlet, condenser ( C) ,6 55,2 70,4 70,1 81,3 103, ,7 57,6 72,9 69,6 80,6 101, ,5 59,7 75,2 69,0 80,0 101, ,0 61,6 77,3 68,5 79,5 100, ,2 63,2 79,4 68,0 79,1 100, ,3 64,7 81,3 67,5 78,8 99, ,0 66,0 83,2 66,9 78,3 99, ,5 67,0 84,9 66,3 77,8 99, ,7 67,9 86,6 65,7 77,2 99, When the heating requirement is the sizing factor Outdoor temp. ( C) Relative humidity [RH %] Max. airflow [m 3 /s] Available heating [kw] 2 Available cooling [kw] 3 Available hot tap water [l] (after 12 hours of charging with 0% heating requirement) Temp. heating medium at outlet, Max. 4 (50 C) condenser ( C) ,0 76,3 96,2 51,4 58,3 73, ,5 68,7 86,4 44,7 50,7 63, ,3 61,3 77,3 38,4 43,4 54, ,6 54,4 69,0 32,7 36,7 46, ,3 47,8 61,3 27,3 30,3 39, ,2 41,5 54,1 22,3 24,2 32, ,1 38,5 49,9 19,3 22,5 28, ,1 35,3 47,2 17,4 20,2 26, ) The available cooling at a given outdoor temperature is calculated when all simultaneous production of heating is initiated in the Energy exchange module in relation to the outdoor air. (The flow through the Energy exchange module is 5.8 m 3 /s outdoor air). 2) The available heating at a given outdoor temperature is calculated when all simultaneous production of cooling is initiated in the Energy exchange module in relation to the outdoor air. (The flow through the Energy exchange module is 5.8 m 3 /s outdoor air). 3) In the event of simultaneous heating and cooling requirements, the smaller amount of energy is produced solely from surplus energy, via the Energy exchange module's heat exchanger coil. 4) All heating energy is used to produce hot tap water with a temperature of 50 C. TELLUS Formulae and aids Calculate amount of hot tap water with different charging time or other water temperatures. V TVV = V TABLE (T v - T k ) Charging time V TVV = Amount of hot tap water after charging time (L) V TABLE = Amount of hot tap water from the table (L) T v = Desired temperature after heating in the hot tap water tank ( C) T k = Temp. of the cold fresh water that is supplied to the building ( C) Charging time = Available time for charging (h) Calculation example For calculation of available hot tap water at -5 C. Information City: Malmö Design outdoor temperature -15 C Lowest outdoor temperature without heating requirement +15 C Size TELLUS 60 Assumptions The heating requirement at -15 C is equal to available heating at -15 C = 38.5 kw The heating requirement at +15 C = 0 kw (see information) The heating requirement between -15 C and +15 C = linear Examples At outdoor temperature of 0 C, 55 C hot tap water is required after 4 hours of charging. The maximum amount of water that is available then is: 40 4 V TVV = = 4,204 litres (L) (55-10) 12 Calculation Heating requirement per degree below -15 C: 38.5 / 30 = 1.28 kw per degree Heating requirement at -5 C: 1.28 x 20 (-5 C to +15 C) = 25.6 kw Heating available for hot tap water at -5 C: = 22.2 kw Available hot tap water at -5 C: 12,400 litres* x 22.2 kw = 5,759 litres/12 hours * See table 5

6 TELLUS, the heart of the system solution TELLUS is the complete substation of the future for air handling, cooling, heating and hot tap water, which can become the heart of many system solutions. Important information is presented here in brief to provide assistance, as well as references to more in-depth information later in this document or in other separate documentation. Investment decisions Information Section Page Benefits Main benefits 1 Sizing, calculation, function Overview, Sizing, dimensions and weights 2, 16 Project design Information Section Page Sizing, calculation, function Overview, Sizing, dimensions and weights 2, 16 Design Description of the unit 7 Accessories, installation Complements and accessories, Specifications 46, 47 Construction Information Section Page Dimensions, measurements, weights Overview 2 Design Description of the unit 7 Installation Simple installation 7 Connections Duct connections, Pipe connections, Electrical and control equipment 13 Accessories Complements and accessories, Specifications 46, 47 Start up & commissioning Information Section Page Dimensions, measurements, weights Overview 2 Design Description of the unit 7 Installation Simple installation 7 Connections Duct connections, Pipe connections, Electrical and control equipment 13 Application Description of the functions 22 Accessories, installation Complements and accessories, Specifications 46, 47 Use and maintenance Information Section Page Dimensions, measurements, weights Overview 2 Design Description of the unit 7 Application Description of the functions 22 Accessories Complements and accessories, Specifications 46, 47 Questions and troubleshooting FAQ 48 6

7 Description of the unit General TELLUS is a complete, modular substation that can be installed both indoors and outdoors. TELLUS produces and distributes all necessary tempered air, cooling energy, heating energy and hot tap water. When all the modules are integrated, this ensures optimum control and interactive dynamic energy recovery. TELLUS is CE marked in accordance with the Machinery Directive MD 2006/42/EC. Application The various TELLUS sizes are based on the cooling capacity that is required for a project (40, 60, 80 kw) and are therefore suitable for commercial buildings/storeys measuring approx m 2. TELLUS is adapted for regions with both a warm climate up to +45 C and/or a cold climate down to -20 C. Can be installed indoors and outdoors. Thanks to the integral optimisation functions, TELLUS is extremely suitable for systems with climate beams. Certification Swegon AB has a certificated Quality Management System that conforms to ISO 9001 and an Environmental Management System that conforms to ISO The GOLD Air handling system is also certificated by Eurovent, No. AHU Built-in control equipment TELLUS' built-in control equipment is operated from the central control panel, which is located on the Energy exchange module. The entire system for airflows, heating, cooling and hot tap water is controlled via a touch-screen with an intuitive interface. TELLUS is supplied as standard with the potential for connection to a network. This function allows rapid remote support, at the same time as making it easier for Swegon to allocate the correct resources for service measures. Simple Installation TELLUS is available in both left-hand and right-hand versions. All the pipes that are required to and from the building are connected on the Hydronic module's short side, i.e. hot water to climate beams or radiators, cold water to climate beams, as well as hot tap water. All necessary hot and cold water tanks, pipework, pumps, valves and dampers are included. Power and control connections are located on the Energy exchange module, which is also where the safety isolating switch is located. A hot tap water tank, with optional volume, is an accessory that can be located anywhere within 10 m, and is entirely controlled by TELLUS. An optional heat source (e.g. district heating) can simply be integrated with the standard connections on TELLUS. TELLUS is supplied as a unit, as four modules or in several parts, in order e.g. to facilitate passage through doors and other confined areas. See separate document, TELLUS installation, for more detailed information about installation. TELLUS N Range: GOLD Power and control connections Water connections Left-hand version Outdoor air Supply air Extract air Exhaust air 7

8 Description of the unit Mechanical design Casing Made of cover panels and inspection doors. External galvanised steel plate, prepainted according to the table below. The inner skin is made of aluminium-zinc plated sheet steel. Environmental class C4. Intermediate insulation made of 50 mm mineral wool is present in the modules that handle air, i.e. the Energy exchange module and the Air handling module. Duct connection of supply air is possible on the Air handling module's end panel or top. The same duct connection options are available for outdoor air on the Energy exchange module. In the case of outdoor installation, a TELLUS unit must be selected with duct connections on the end panel (not on the top of the unit). The inspection doors are hung on hinges and are fitted with flush-mounted door handles. The door handles must be opened in two steps to equalise the pressure before the door can be opened completely. Leakage class L2 according to EN 1886:2007 Standard. CE labelled. Conform to the provisions of EN and EN Standards. Air handling module Hydronic module Energy exchange module Chiller & heat Power and control pump module connections Safety isolating switch Modular concept In order to meet the needs specified as regards the amount of tempered air, cooling, heating and hot tap water, the TELLUS modular concept has been designed to provide significant flexibility during configuration. Module Colour tone * Air handling module beige (NCS S2005-Y20R) Chiller & heat pump module blue (NCS S 2030 B) Hydronic module Energy exchange module green (NCS S 3020-G50Y) grey (NCS S 1005-B) * TELLUS can also be supplied with all the modules in one colour tone (beige). Damper Two dampers of the TCSA model are installed between the Air handling module and the Energy exchange module as standard. The motor-driven dampers (modulating) are used as shut-off dampers. 8

9 Description of the unit Mechanical design Air handling module The air handling module is based on Swegon's tried and tested GOLD concept. The module is available in several different sizes for airflows of between m 3 /s (720-15,800 m 3 /h). The outdoor air is heated or cooled by the highly efficient, rotating heat exchanger, and is subsequently further heated or cooled as required via the built-in, liquid-borne dual-purpose coil. Full power and durability for long-term high outdoor temperatures are guaranteed up to +40 C. Direct-driven fans supply good electrical efficiency, a uniform airflow and low noise levels. Class F7 bag filters for both the supply air and the extract air. Air handling module Fans The direct-driven fans are of GOLD Wing+ type, unique axicentrifugal fans with the focus on excellent power efficiency, uniform airflow and low noise level. The GOLD Wing+ is patented. Functional sections such as air coolers and bends can be connected directly to TELLUS without appreciable pressure losses. This saves space in the fan room. The fans are driven by high-efficiency EC motors, which together with a motor control system especially developed for the GOLD, perform with extremely high efficiency. The fan motors have a motor control system for variable speed regulation and the fans have measurement tappings for continuous measurement and regulation of the airflow. The fans are effectively vibration-isolated from the casing by means of rubber bushings/flexible connections or steel-spring anti-vibration mountings/flexible connections, depending on size. The fans are fixed in their positions by means of locking knobs/ screws and clamping bands. These fasteners can easily be loosened, after which the entire fan assembly can be withdrawn for inspection and maintenance. TELLUS Filters The filter material is glass fibre. The filter holder has a filter locking system designed for effective sealing. The air handling module has Class F7 bag filters for both the supply air and the extract air. Pressure sensors for measuring the pressure drop across the filters are incorporated into the control system. Heat exchanger RECOnomic rotary heat exchanger with a temperature efficiency of up to 85%. The heating load is regulated by automatically and variably regulating the speed of the heat exchanger. The rotary heat exchanger effectively recovers cooling energy as well. It is available in a hygroscopically treated version for moisture recovery (which also reduces costs for cooling), and an epoxy treated version. Purging sector, commissioning plates and pressure measuring tappings as standard, ensuring that extract air is not transferred to the supply air. The RECOnomic heat exchanger is patented. Purging sector 9

10 Description of the unit Mechanical design Energy exchange module The additional energy for the system's energy exchange is obtained from the Energy exchange module. The module's fan energy consumption can be reduced by 25-50% as the Air handling module's exhaust air can also be utilised. The Energy exchange module's heat exchanger coil recovers residual heating or cooling energy in the exhaust air. The Hydronic module regulates how this energy is best used. When the exhaust air is not sufficient, a damper is opened between the exhaust air and the outdoor air. The Energy exchange module's fan is controlled variably in order to extract additional heating energy from the outdoor air in the winter by allowing it to pass the heat exchanger coil, in order to heat the cold water that is circulated there. In the summer, the same function can be used to extract cooling energy and cool the water in the heat exchanger coil. Full power and durability for long-term high outdoor temperatures are guaranteed up to +40 C. Energy exchange module Chiller & heat pump module Supplies the system with the extra heating and cooling energy that is required, via the demand-controlled Hydronic module. The module works as a water-water unit or as an air-water unit together with the Energy exchange module. Energy-efficient and reliable tandem compressors supply heating and cooling energy on to the Hydronic module, via a heat exchanger. The compressors can be controlled independently of each other according to needs. The compressor circuit uses the wet vapour injection technique, which provides better energy efficiency and a broader operating range/temperature span. This is achieved as the technique reduces the temperature of the hot gas in order to ensure that the oil temperature is kept sufficiently low. Type R410A internal refrigerant is used. Chiller & heat pump module Compressor circuit 10

11 Description of the unit Mechanical design Hydronic module Satisfies the need for heating and cooling energy that exists in the system by regulating the flows. The majority of the pipework, pumps, valves and expansion tanks that govern the system's water flow are located in this module. Hydronic module All pipes that are required to and from the building are connected to the module's short side. If you want to use an external heat source as backup or in addition, you can connect this via the existing extra pipes on the short side of the Hydronic module (e.g. district heating or a central heating boiler). This should be viewed as additional, as TELLUS is normally entirely self-sufficient Designation A 1 A 2 B 3 B 4 C 5 C 6 D 7 D 8 Explanation Waterborne cooling Return line Waterborne cooling Supply line Charging tap water Supply line Charging tap water Return line Waterborne heating Supply line Waterborne heating Return line External heat source Supply line (option) External heat source Return line (option) Cold and hot water tanks On the rear of TELLUS there is a cold water tank and a hot water tank, each with a capacity of 500 litres. The water connections and controls for charging an external hot tap water tank are included. The cold and hot water tanks act as a buffer system. When TELLUS produces more heating or cooling energy than the current requirement, surplus energy is stored in the relevant tank. The stored energy can be circulated in the system to maintain a more even temperature and thereby provide an increased level of comfort. The available amount of hot tap water is dependent on the simultaneous heating requirement in the property, the size of the hot tap water tank and the potential charging time. When there is a sufficient cooling load, hot tap water is obtained at no additional cost. The amount of available hot tap water decreases the lower the design outdoor temperature, and an extra heat source in the form of e.g. an electric heater may be necessary. The hot tap water module which controls temperatures, functions for safeguarding against legionella and possibly a tank are available accessories. An HWC (hot water circulation) pump can also be selected. 2 A 8 D Pipe connections on the short side of the Hydronic module Cold and hot water tanks on the rear of TELLUS 4 B 6 C TELLUS 11

12 Description of the unit Mechanical design Hot tap water module The hot tap water module, which is available as an option, is connected to a heat exchanger in the Hydronic module. The relevant heat exchanger is optional. In order to achieve the best energy efficiency, the hot tap water is preheated. Winter conditions Preheating takes place by means of produced heating water, which is used to heat the property, passing through the heat exchanger for the hot tap water. In this way, the hot tap water is heated to the same temperature as the building's heating system. Summer conditions Preheating takes place in the same way as for winter conditions, although in this case the heating energy that is the surplus from the production of cooling is used to preheat the hot tap water. Preheating takes place in a separate preheating tank(s). To achieve the desired temperature at the tap outlet, the hot water is top-heated. With top-heating, the temperature increases on the heat pump's hot side and the entire flow passes the hot tap water exchanger until the required amount of water has been heated. In order to prevent the occurrence of legionella bacteria, an electric heater is used in the hot tap water system. The hot tap water is then heated above a certain level at given intervals in order to kill any bacteria. Hot tap water requirement As an indication, the needs for hot tap water are covered according to the table below: Office School (with sports hall) Hotel Stockholm Malmö Stuttgart Lisbon Stockholm Malmö Stuttgart Lisbon Stockholm Malmö Stuttgart Lisbon always always always always usually* always always always partially* sometimes* For more information for calculations, see examples in the section "Overview / Formulae and aids" on page 5. always always (* extra heat source required) 12

13 Description of the unit Mechanical design Duct connections The Air handling module has a circular duct connection for the size (on the Air handling module) that handles max. airflow 1.5 m 3 /s (5,400 m 3 /h). Circular duct connections are intended to be connected to ducts with insertion joints fitted with rubber seals. Other sizes have rectangular duct connections with a fixed connection frame for guide connection. Type METU connection frames are available as an accessories. TELLUS fans produce an even airflow immediately after the outlet, making it possible to connect duct bends and functional sections immediately with no appreciable pressure losses. When insulated duct accessories are selected, these are docked directly to TELLUS, which is then supplied with no end connection adapter for the relevant inlet/outlet, known as "full face". Pipe connections All pipes that are required to and from the building are connected to the Hydronic module's short side. Pipes should not be routed directly in front of hot water tanks, as this can make access more difficult for any service work. The dimensions for connections are DN 32 for TELLUS 40/60 and DN 40/60 for TELLUS 80. TELLUS Drainage Drainage must be present to handle run-off from batteries and any discharges from the TELLUS water circuit. Normal run-off, such as condensation from batteries, can be led out via the building's drainage system. Any leakage, as well as discharges from safety valves, must be routed to a separate collection vessel or another closed system, as the water circuit contains glycol which must not be released into the drainage system. Commissioning plates To ensure that purging through the heat exchanger works as intended, TELLUS is supplied with commissioning plates. Using these, the correct pressure balance can be set so that the purging airflow passes in the right direction. The commissioning plates are supplied uninstalled, and must be positioned by the extract air inlet. 13

14 Description of the unit Electrical and control equipment General TELLUS' built-in control equipment is operated from the central control panel, which is located on the Energy exchange module. The entire system is controlled via an intuitively designed interface. All values for airflows, heating, cooling, hot tap water and operating conditions are set here. Control panel TELLUS' control panel comprises a 6.5 pressure-sensitive touchscreen with leakage class IP66. Resistive touch technology guarantees high functionality for an extended period. The control panel's main menu provides clear navigation assistance and makes it possible to monitor the system and its various modules. The INSTALLATION, SERVICE and ALARMS menus require extended authorisation, as extensive knowledge is required of the system and its functions for the settings that can be adjusted. For more information about submenus, see the section "Description of functions / Controls" on page 22, as well as separate documentation. Integrated web server / BMS A large number of functions and settings can be adjusted, either via TELLUS' integrated web server or existing BMS. Control inaccuracy: Temperature ± 1 K. Airflow ± 5%. Electrical efficiency The design and performance of TELLUS are optimised for achieving excellent power efficiency. Two electric gauges are installed in TELLUS as standard, with one monitoring the entire system and the other only monitoring the Chiller and heat pump module. Connecting electrical and control equipment Power and control connections are located on the Energy exchange module. The safety switch is located on the outside of the same module, close to these connections. The earth fault circuit breaker, if required, should only serve TELLUS and must be of a type designed for use with the control system of the EC motor. Standards TELLUS satisfies the standards in ELSÄK-FS 1999:5 and SS-EN Enclosure class IP 54. TELLUS satisfies the requirements according to the EMC Directive. The controls are designed to conform to the requirements in the EN and EN Standards (radiation in homes, offices, shops and similar environments as well as for immunity in industrial environments). 14

15 Sizing, dimensions and weights TELLUS (with recirculation) Delivery and transport within the site TELLUS comprises four modules which, in their standard version, are installed as a unit from the factory. The parts are joined together with bolts and have quick-release couplings for water, electrical connections and control cables between the parts. TELLUS can also be supplied as four separate four modules or in several parts, in order e.g. to facilitate passage through doors and other confined areas. The delivery method as a unit or in several parts must be specified when ordering. Delivery takes place on wooden pallets. Alternative for pipe and duct connection Specify right-hand or left-hand version when ordering. Clear space for inspection A clear space of 1100 mm should be provided in front of TELLUS and at least 100 mm should be provided above. In addition, at least 300 mm clear space should be left between the rear of TELLUS and an adjacent wall or other equipment. Power connection 3-phase, 5-wire cable, 400 V -10/+15%, 50 Hz, 35 A (TELLUS 40), 50 A (TELLUS 60) or 63 A (TELLUS 80) Rated data per fan Motor shaft power: 2.4 kw (1.5 kw)*, motor control system, 3 x 400 V, 50 Hz *The motor control system limits the power of the take-off to the value specified. B A C TELLUS H G I D F E Diagram shows left-hand version Dimensions, measurements and weights Size A B C D E F Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) Size G H I Weight with Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) liquid kg 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) Weight without liquid kg

16 Sizing, dimensions and weights TELLUS (with recirculation) I H J I K H I K R Q S R T L J U M M V L K N N U O O W O P O P Rectangular duct connection, supply-/extract air side airflow >1,5 m 3 /s (>5400 m 3 /h) Dimensions and measurements Circular duct connections, supply-/extract air side airflow >1,5 m 3 /s (<5400 m 3 /h) Exhaust-/outdoor air side Diagrams show left-hand version Size H I J Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) Size K L M Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) Size N O P Q R S T U V W Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) PM PM PM PM PM PM * Circular duct connection (otherwise rectangular duct connection) Dimensions and measurements (pipe connections) A B C Size A B C D E F PM PM PM PM PM PM F G H I J K L D E Size G H I J K L PM PM PM PM PM PM 16

17 Sizing, dimensions and weights TELLUS (without recirculation) Delivery and transport within the site TELLUS comprises four modules which, in their standard version, are installed as a unit from the factory. The parts are joined together with bolts and have quick-release couplings for water, electrical connections and control cables between the parts. TELLUS can also be supplied as four separate four modules or in several parts, in order e.g. to facilitate passage through doors and other confined areas. The delivery method as a unit or in several parts must be specified when ordering. Delivery takes place on wooden pallets. Alternative for pipe and duct connection Specify right-hand or left-hand version when ordering. Clear space for inspection A clear space of 1100 mm should be provided in front of TELLUS and at least 100 mm should be provided above. In addition, at least 300 mm clear space should be left between the rear of TELLUS and an adjacent wall or other equipment. Power connection 3-phase, 5-wire cable, 400 V -10/+15%, 50 Hz, 35 A (TELLUS 40), 50 A (TELLUS 60) or 63 A (TELLUS 80) Rated data per fan Motor shaft power: 2.4 kw (1.5 kw)*, motor control system, 3 x 400 V, 50 Hz *The motor control system limits the power of the take-off to the value specified. B A C TELLUS H G I D Dimensions, measurements and weights F E Diagram shows left-hand version Size A B C D E F Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) Size G H I Weight with Weight without liquid Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) liquid kg kg 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400) 2,1 (7 500) 3,0 (10 800) 4,4 (15 800)

18 Sizing, dimensions and weights TELLUS (without recirculation) I H J I K H I K R Q S R T L J U M M V L K N N U O O W O P O P Rectangular duct connection, supply-/extract air side airflow >1,5 m 3 /s (>5400 m 3 /h) Dimensions and measurements Circular duct connections, supply-/extract air side airflow >1,5 m 3 /s (>5400 m 3 /h) Exhaust-/outdoor air side Diagrams show left-hand version Size H I J Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) Size K L M Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) Size N O P Q R S T U V W Depending on max. airflow m 3 /s (m 3 /h) 1,5 (5 400)* 2,1 (7 500) 3,0 (10 800) 4,4 (15 800) PM PM PM PM PM PM * Circular duct connection (otherwise rectangular duct connection) Dimensions and measurements (pipe connections) A B C Size A B C D E F PM PM PM PM PM PM F G H I J K L D E Size G H I J K L PM PM PM PM PM PM 18

19 Sizing, dimensions and weights Software and resources TELLUS Energy Comparison TELLUS Energy Comparison calculates what size of TELLUS is best suited for the project in question, using the entered parameters. The program window is divided into three main tabs: Parameter, Calculation result and Drawing. The relevant parameters for the project are filled in under the tab "Parameter" Tab two, "Calculation result", shows the results of the calculations that have been performed and sets these in relation to other system solutions by way of comparison. The tab "Drawing" shows the relevant system as well as certain technical data, such as measurements and weight. It is possible to see the system drawing of TELLUS in various views, either as a unit or divided into several modules. For more information about TELLUS Energy Comparison, see the manual. TELLUS 19

20 Sizing, dimensions and weights Additional software and resources for sizing and calculation ProUnit TELLUS is being launched in ProUnit during August For more information about ProUnit, see the manual. Swegon System Choice Swegon System Choice is a system selection program that calculates initial costs, energy consumption, simplified power requirement, maintenance costs, repair costs and life cycle costs based on Swegon components if possible. It is possible to obtain a productivity value based on studies conducted into links between productivity and airflow or indoor temperature. The included systems are constant flow, variable flow based on occupancy or temperature, ceiling air diffusers, chilled beams and fan coils, with the potential to control lighting as well as temperature based on occupancy. For more information about Swegon System Choice, see the manual. 20

21 Sizing, dimensions and weights Additional software and resources for sizing and calculation ProClim ProClim is a web-based program that calculates the energy balance at room level. The program helps the project designer to calculate the cooling and heating capacity required in each room. Further information is available at (com), where the program and manual are available. ProSelect ProSelect is a web-based program for calculating all of Swegon's cooling and room products. The program calculates the optimum product choice for the room as regards capacity for cooling, heating, ventilation and air diffusion. For more information about ProSelect, see the manual. TELLUS 21

22 Description of the functions Control TELLUS' control equipment is operated via a central control panel located on the Energy exchange module. The entire system is controlled via an intuitively designed interface (HMI). All values for airflows, heating, cooling, hot tap water and operating conditions are set here. A large number of functions and settings can be adjusted, either via TELLUS' integrated web server or existing BMS. Control panel - MAIN The Main menu provides clear navigation assistance. Some of the choices that are possible here require extended authorisation, as the adjustments that can be made require extensive knowledge of the system and its functions. Control panel - USER The User menu makes it possible to monitor the system and its various modules. Certain settings can be implemented without extended authorisations. Control panel - INSTALLATION The Installation menu requires extended authorisation, as it is possible to adjust settings that have a considerable impact on the system and its functions. This menu is largely used during installation and commissioning. Control panel - SERVICE The Service menu, just like the installation menu, requires extended authorisation. This menu is used mostly during service and maintenance work, as well as if detailed operating information is required. Control panel - ALARMS This menu shows any alarm and event codes for further assistance during troubleshooting or routine service and maintenance work. For more information about TELLUS' control equipment, as well as more in-depth information about all the control panel's menu steps, see separate documentation. 22

23 Description of the functions Temperature regulation, air handling ERS Regulation (control) ERS regulation means Extract air temperature-related Supply air temperature regulation. This means that the temperature of the supply air is regulated in relation to the temperature of the extract air. Under normal circumstances, the supply air temperature is regulated to be a few degrees lower than the extract air temperature. In this way, the heat exchanger will provide optimal performance, resulting in excellent operating economy. ERS control is suitable for use when there is surplus heat in the premises generated e.g. by machinery, lighting or people, and the premises have supply air diffusers suitable for discharging air below room temperature. Control sequence The temperature efficiency of the TELLUS heat exchanger is modulated to provide max. heat recovery. After this, air heaters for reheating begin to generate heat. When the output of the air heater for reheating is not sufficient, the supply airflow or both the supply airflow and the extract airflow will be decelerated automatically and steplessly. A neutral zone can be preset, which allows a lower supply air temperature setpoint before the deceleration begins. When the supply airflow is regulated to a lower rate, the heat exchanger will have a "surplus" of warm extract air, giving it capacity to maintain the required supply air temperature. As the supply airflow is regulated to a lower rate, the air pressure in the premises will become negative and this will instead cause outdoor air to be drawn in through leakage spots such as doors and windows. The ordinary heating system in the premises must be sized for heating this outdoor air. ERS Regulation 1 The control unit regulates the ratio between the supply air and extract air temperature according to a factory-preset curve. 1) Breakpoint in C (based on the extract air temperature). 2) Temperature differential above the breakpoint is selected in four steps. 3) Temperature differential below the breakpoint is selected in K (Kelvin). See the diagram to the right. ERS Regulation 2 Used if the factory preset performance curve in the ERS Control 1 function does not provide the results desired to meet special needs and conditions. An individually adjusted curve regulates the supply air/extract air temperature ratio. See the diagram to the right. ERS Regulation 1 Step Factory setting: Extract air temperature C Step 3. Breakpoint 22 C. SA/EA differential 2 K. Entails the following: If the extract air temperature is below 22 C (breakpoint), the supply air temperature setpoint will be automatically regulated to be 2 K (EA/SA differential) lower. If the extract air temperature is above 22 C, the supply air temperature setpoint will be constantly 16 C (step 3). Supply air temperature setpoint C ERS Regulation 2 Y = Supply air temperature setpoint C SA/EA differential 1 Breakpoint 2 Step 1 3 Step 2 Step X = Extract air temperature C Factory settings breakpoints: X1 = 15 C. X2 = 20 C. X3 = 22 C. Y1 = 20 C. Y2 = 18 C. Y3 = 14 C. Entails the following: If the extract air temperature is below 15 C (X1), the supply air temperature setpoint will constantly be 20 C (Y1). If the extract air temperature is 20 C (X2), the supply air temperature setpoint will be 18 C (Y2). If the extract air temperature is above 22 C (X3), the supply air temperature setpoint will constantly be 14 C (Y3). 23 TELLUS

24 Description of the functions Temperature regulation, air handling Supply air regulation (control) Supply air regulation involves maintaining a constant supply air temperature without consideration to the load in the premises. Supply air regulation can be used when the load and temperatures of the premises are predictable. In most cases this requires the installation of an air heater for reheating, possibly an air cooler as well. Control sequence The temperature efficiency of the TELLUS heat exchanger is modulated to provide maximum heat recovery. After this, air heaters for reheating begin to generate heat. When the output of the air heater for reheating is not sufficient, the supply airflow or both the supply airflow and the extract airflow will automatically and steplessly be decelerated. A neutral zone can be preset, which allows a lower supply air temperature setpoint before starting deceleration. When the supply airflow is regulated to a lower rate, the heat exchanger will have a "surplus" of warm extract air, giving it capacity to maintain the required supply air temperature. As the supply airflow is regulated to a lower rate, the air pressure in the premises will become negative and this will instead cause outdoor air to be drawn in through leakage spots such as doors and windows. The regular heating system in the premises must be sized for heating this outdoor air. Extract air regulation Extract air control involves maintaining a constant temperature in the extract air duct (the premises), by regulating the supply air temperature. The lowest and the highest permitted supply air temperatures are specified, while the Air handling module keeps the extract air temperature constant. The result will be a uniform temperature in the premises regardless of the load. The extract air temperature is measured by the Air handling module's internal temperature sensor. If this internal temperature sensor does not give sufficiently representative extract air temperature readings, an external room temperature sensor can be installed and connected to the control unit. Control sequence The temperature efficiency of the TELLUS heat exchanger is modulated to provide maximum heat recovery. After that, the air heater for reheating, if installed, begins to generate heat. Outdoor compensation Temperature Outdoor compensation can be activated if the premises are affected to an unusually high degree by cold and heat, for example via large windows. If the function is selected, the temperature setpoint is displaced relative to the outdoor temperature according to a summer curve or a winter curve. It is possible to set the incline of the curves and their starting and end points. In conjunction with supply air or extract air control only. See diagram below. Negative summer compensation can also be preset. Outdoor compensation Y = Temperature displacement K Y1 X1 X = Outdoor air temperature C Winter compensation in accordance with factory setting involves: Outdoor temperature of +10 C (Breakpoint X2): Compensation starts and gradually proceeds between 0 3 K down to an outdoor air temperature of -20 C. Outdoor air temperature of -20 C (Breakpoint X1): Constant compensation takes place by 3 K (temperature displacement Y1). Summer compensation in accordance with factory settings involves the following: Outdoor temperature +25 C (Breakpoint X3): Compensation starts and gradually proceeds between 0 2 K up to an outdoor temperature of +40 C. Outdoor temperature +40 C (Breakpoint X4): Constant compensation takes place by 2 K (temperature displacement Y2). X2 X3 X4 Y2 24

25 Description of the functions Temperature regulation, air handling Summer night cooling The lower temperature at night is utilised to cool down the building structure. This reduces the cooling requirement during the first hours of the day, which reduces the need to use the Chiller & heat pump module. Setpoint displacement Setpoint displacement is used to change the setpoint for supply and extract air temperature. For example, the temperature can be increased or decreased at certain times of the day by means of an external timer or potentiometer. The setpoint can be influenced ±5 K using external control 0-10 V. Extra control sequence An extra control sequence is used for extra control functions, together with the regular sequence for temperature regulation. The extra control sequence can be used for utilising existing heating or cooling sources, such as from a refrigerating plant. The function can also be used for an extra air heater or air cooler. The maximum output signal can be limited from 100% down to 0%. The extra control sequence can be select as a heating or cooling sequence. Can be combined with intermittent nighttime operation. TELLUS Extended heating sequence If functions in the extra control sequence for heating are not sufficient, an extended heating sequence must be used. The function requires the accessory IQnomic Plus module TBIQ. The extended heating sequence provides the potential to control two air heaters at the same time in the following combinations: water - electricity, water - water, electricity - electricity. The air heater for hot water is available without or without frost guard function. When the output of the first air heater is not sufficient, the second is automatically brought into the sequence. A start-up sequence, frost guard function, pump control, postcooling for electric air heater and other functionality are available. For the start-up sequence, frost guard function, exercising procedure and post-cooling, the same settings are used as for regular reheating. Season heating When both the standard function for reheating and the extended heating sequence are activated, it is possible to deactivate one of these via a digital input or communication. Example: hot water is only available in the winter; in the summer, any reheating requirement is backed up with an electric air heater. Changeover takes place via an external thermostat, external clock function or similar. 25

26 Description of the functions Temperature regulation, air handling External temperature sensors One external outdoor sensor or room sensor There is provision for connecting external sensors, which can be used when TELLUS internal sensor does not provide representative values. The External Extract air/room function measures the extract air temperature in a larger room or in the duct system, instead of the temperature inside TELLUS. External Outdoor measures the outdoor temperature outside instead of inside TELLUS. The Air handling module also has provision for connecting an external temperature sensor for alarms. The alarm limit in C and alarm delay are adjustable. Two to four external room temperature sensors (multisensor) Up to four external room temperature sensors can be connected to TELLUS' control circuit card. The function requires TBLZ room temperature sensor accessories. Locate the room temperature sensors in suitable positions to obtain representative measured values. TELLUS is controlled in response to a calculated mean value of the temperature sensors measured values, or alternatively in response to signals from the temperature sensor that measures the lowest or highest value. Control function Temperature sensors in the ducts keep the preset temperature constant. The required setpoint is set on TELLUS' control panel. Frost guard function The alarm limit and heat retention function settings are common for the preheating coil and the regular air heater in the supply air path. Pump control Provision is available for controlling pump operation. The settings for exercising will then be shared with the regular air heater in the supply air. Electric air heater Overheating monitor and recooling whenever TELLUS stops. Preheating the air Preheating the air if the outdoor temperature is cold and the humidity is high can prevent condensation from forming in the Air handling module s filters. Preheating may also be necessary to heat the air during extremely cold weather. The air preheating function requires the accessories: TBLF/TCLF air heater (including TBLZ for controlling the air heater) or, if an air heater other than the TBLF/TCLF is used, controlling air heater preheating with TBLZ-1-53-a. The TBVA valve set can be used for the air heater for hot water, and if a pump is required, the TBPA pump set can be used. The following type of air heater can be selected: Electric air heater of pause/pulse type Electric air heater, 0-10 V. Air heater for hot water with frost guard function. Air heater for hot water without frost guard function. 26

27 Description of the functions Temperature regulation of cooling and heating water SUPPLY AIR EX- TRACT AIR A B A B Perimeter climate systems C Heating water Cooling water TELLUS hot and cold water tanks Climate beams C All Year Comfort The All Year Comfort function is used to control TELLUS' primary water circuits for cooling and heating to the climate beams, perimeter climate systems, radiators, etc. The function keeps the cold water and hot water temperature constant at the required setting in the cooling and heating systems respectively. The water temperature is measured with two strap-on temperature sensors (see A in the figure above) which govern the control valve (see B in the figure above) according to the preset performance curve. See also Dehumidification control under Humidity. TELLUS Outdoor compensation To make it possible to adapt the primary water circuit temperature to the design of the building and the outdoor temperature, the supply flow temperature's setpoint must be adjusted in line with the outdoor temperature according to an adjustable performance curve. The curve can be adapted to various conditions by means of three adjustable points. Room compensation In the event of an extra cooling or heating load, the supply flow temperature for the cold or hot water respectively can be adjusted. Setpoint for the supply flow temperature is influenced by the room temperature. The setpoint for regulating the hot water is reduced when the room temperature exceeds the preset limit value. The setpoint for regulating the cold water is increased when the room temperature drops below the preset limit value. Night blocking makes it possible to block the function at night. Supply flow temperature, cold/hot water, C Temperature, outdoor air, C Heating Cooling 27

28 Description of the functions Temperature regulation of cooling and heating water All Year Comfort, contd Night compensation If the premises are not utilised at night and on weekends, the water temperature can be adjusted in order to save energy. The supply flow temperature setpoint is decreased (heating circuit) or increased (cooling circuit) during the preset period. It is possible to set two periods for night and weekends respectively via two time channels. Dew point compensation (cooling water only) This function requires the TBLZ humidity sensor (accessory). The moisture content and temperature of the extract air (see C in the figure) are measured in order to ensure that no condensation forms on cold metallic surfaces. On the basis of the measured values for relative humidity and temperature, the current dew point (the temperature at which the moisture in the air condenses) is calculated. When the dew point exceeds the cooling water temperature, the cooling water setpoint is raised to counteract condensation precipitation. To compensate for any losses in cooling capacity in the event of an increasing cooling water temperature, the airflow can be increased to extract more surplus heat. Pump/valve The pump for the heating circuit is started and stopped according to preset outdoor limit temperatures. The pump for the cooling circuit is operated together with the Air handling module and is stopped when TELLUS is shut down. It is also possible to stop the pump for the cooling circuit if the outdoor temperature is below the preset setpoint. The alarm for the pumps can be monitored, and the valves can be monitored by means of an alarm in the event the valve position is incorrect. In order to prevent the pumps and valves from becoming clogged, in the event of a prolonged period of downtime, they can be exercised at preset time intervals. 28

29 Description of the functions Temperature regulation, hot tap water The external tap-hot-water module is charged through connection to the Hydronic module's pipe connections for tap water charging. Temperatures are measured at several points in the water heater to ensure that the need for hot tap water can be satisfied. If the temperature at the top of the heater is below its starting temperature, the Hydronic module begins to charge the heater until it is deemed to be fully charged. In addition to measuring the temperature in the upper part of the heater, the heater's charging level is also evaluated using additional temperature sensors. If this level is low, charging is initiated even if the temperature in the heater's upper section is satisfactory. This ensures hot tap water performance in the event of large, temporary requirements. When the hot tap water module is being charged, it is possible to continue heating the building by means of the stored heat that is present in the built-in accumulator tank. The water heater is equipped with an electric heat source that regularly raises the temperature in the heater and thereby eliminates legionella bacteria. Chiller and heat pump module S Heat exchanger Tap water tank(s) Accumulator tank Diagrammatic sketch, tap water production TELLUS 29

30 Description of the functions Flow/pressure, air handling Fan regulation (control) The type of control can be selected individually for the supply air fan or the extract air fan. Flow regulation Flow control involves the TELLUS unit keeping the preset airflow constant. The speed of the fans is automatically regulated to provide correct airflow even if the filters begin to become clogged, if air diffusers become blocked, etc. A constant airflow is advantageous, since the airflow is always at the level preset from the beginning. Seasonally compensated airflow Outdoor compensation of the airflow can be activated if the airflow is to be reduced in the winter. Seasonally compensated airflow is an energy-saving function that reduces the costs for operating the fans, reheating and the building's regular heating system. This function cannot be combined with flow regulation or pressure regulation. The function has no effect if the airflow is demand-controlled. Pressure regulation Pressure control involves automatically varying the airflow to provide constant pressure in the ducting. This type of control is therefore also called VAV Regulation (Variable Air Volume). Pressure regulation is used when e.g. damper functions increase the airflow in sections of the ventilation system. The duct pressure is measured by an external pressure sensor in the ductwork. The setpoint required (separate for low speed and high speed) is adjusted in Pa. The function can be limited so that the fan speed does not exceed the preset max. permissible values. Y = Reduction of the airflow % 0% X2-10% -20% Y1-30% X1-40% -50% X = Outdoor air temperature C Demand control Demand control involves regulating the flow requirement via external sensors, such as a carbon dioxide sensor that is wired to the control unit. The setpoint, separate for low speed mode and high speed mode, is preset as a percentage of the input signal. The function can be limited so that the flow will not be higher or lower than the preset max. and min. permissible values respectively. Slave control Slave control involves constantly regulating the flow to be the same as the other fan. If one fan is pressure-controlled or demand-controlled, the other one can be controlled as a slave to generate the same airflow. The performance of the slave fan can be restricted if its maximum flow is set to a lower airflow rate. It is not possible to control both fans as slaves. If both are selected by mistake, the extract air fan will be forced to operate in the flow regulation mode. Outdoor air compensation according to factory settings involves: Outdoor temperature of +10 C (Breakpoint X2): Compensation starts and gradually proceeds between 0 30% down to an outdoor air temperature of -20 C. Outdoor air temperature of -20 C (Breakpoint X1): Constant compensation proceeds at 30% (max. reduction Y1). Density-corrected airflow The density of the air is different at different temperatures. This means that a specific airflow changes at various air densities. The Air handling module automatically corrects this, so that the correct airflow is always obtained. 30

31 Description of the functions Flow/pressure, air handling Boost Boosting can be used e.g. in assembly halls, where a higher rate of air change is needed under full-load conditions. The airflow is regulated between two flows from an external signal, e.g. potentiometer. Boost is activated only when TELLUS operates at high speed. Reduction of flow/pressure through regulation In the event of an increased heating load for ERS control or supply air control, the deceleration of the supply airflow or both the supply airflow and the extract airflow is the final step in the control sequence. An adjustable reduction in temperature allows a lower supply air temperature setpoint, before reduction is initiated. Zero calibration The zero value of the pressure sensors is checked and if the value is not correct, a new calibration is carried out. Engages automatically every time the fans are stopped for more than three minutes. OPTIMIZE The OPTIMIZE function optimises the Air handling module's airflow for the connected WISE system (see separate documentation for WISE). Air recirculation section Intermittent night heating TELLUS is utilised to heat the premises when it is normally stopped by the timer. Intermittent night heating requires an external room sensor. The function works best if the Air handling module is equipped with an air recirculation section and shut-off dampers for the outdoor air and the exhaust air. When the function is activated, TELLUS detects when the room temperature drops below the preset start temperature. TELLUS starts with preset flows and the supply air temperature setpoint. Can be combined with extra control sequence. Intermittent night-time heating with air recirculation section: If the extract airflow is set to 0 and the damper output is not activated, the following takes place: When conditions for starting are met, outdoor air and exhaust air shut-off dampers remain closed. The damper in the air recirculation section is opened. The extract air fan is idle. The supply air fan operates according to the preset supply airflow and the air heater for preheating operates according to the preset supply air temperature setpoint, until the conditions for stopping are met. SUPPLY AIR / EXTRACT AIR TELLUS Morning BOOST TELLUS is utilised to heat the premises during a preset period prior to the switch-in time set on the timer. Morning BOOST is used if the air recirculation section is installed. TELLUS starts early and utilises the same settings for operation and temperature regulation as is the case for the regular start time, except that the air is recirculated through the TELLUS unit. 31

32 Description of the functions Air recirculation section SUPPLY AIR EX- TRACT AIR CO 2 ReCO 2 ReCO 2 can be used where recirculated air is accepted, and where heating and cooling require larger airflows than that demanded by the requirement for air quality. ReCO 2 ensures air quality and air temperature, but consumes no more fan energy than necessary. ReCO 2 requires the following accessories: The TCBR recirculation section, complete with modulating damper actuator and spring return. TBSA/TCSA outdoor air damper, complete with modulating damper actuator and spring return. Air quality sensor ELQZ (this sensor is selected in those cases where the function is intended to be controlled by air quality). Complete kit for controlling ReCO 2, TBLZ The function can be selected for CO 2 function or temperature function. CO 2 The supply and extract airflow is constant according to the preset airflow on TELLUS' control panel. The recirculation damper opens and closes variably in order to obtain the preset air quality. The minimum outdoor and exhaust air volumes are set on the control panel. The pressure sensor and the modulating outdoor air damper ensure the correct outdoor air volume* and balance in the TELLUS unit. * The minimum permissible outdoor air volume is affected by the total pressure drop in the ventilation system and therefore must be calculated. CO 2 + Flow The supply and extract airflow is constant according to the preset airflow on TELLUS' control panel. The recirculation damper opens and closes variably in order to obtain the preset air quality. The minimum outdoor and exhaust air volumes are set on the control panel. The pressure sensor and the modulating outdoor air damper ensure the correct outdoor air volume* and balance in the TELLUS unit. When the damper is completely closed for return air and the preset air quality is not achieved, the airflow will be steplessly increased to achieve the preset air quality. The airflow can be increased up to the preset max flow. Temperature The mixture of return air takes place in sequence with heating and cooling. For the heating sequence, it is possible to select whether the function is active or not active. It is also possible to select whether the mixture of return air should take place before the sequence for the air heater has engaged (economy function), or whether the mixture of return air should take place when the sequence for the air heater is at 100% and there is still a heating requirement (comfort function). For the cooling sequence, it is possible to select in the same way whether the function is to be active or not active. It is also possible to select whether the mixture of return air should take place before the sequence for the air cooler has engaged (economy function), or whether the mixture of return air should take place when the sequence for the air cooler is at 100% and there is still a cooling requirement (comfort function). The minimum outdoor and exhaust air volumes are set on the control panel. The pressure sensor and the modulating outdoor air damper ensure the correct outdoor air volume* and balance in the TELLUS unit. The Heating Boost and Cooling Boost functions are activated on the control panel if an increased supply airflow is required in the event of a heating or cooling load. These functions can be combined with all the functions described above. 32

33 Description of the functions Filters Filter monitoring The Air handling module's filter is supplied with a pressure sensor that continuously measures the filters' current pressure drop. Together with an efficient filter monitoring function, this offers optimum filter utilisation. Readings Current pressure drop and calculated alarm limit can be read on TELLUS' control panel. Alarm limit of the filters As the filters become soiled, the pressure drop across them increases (the speed of the fans automatically increases to compensate for the resistance caused by the clogged filter medium). The alarm limit must be continuously calculated and automatically changed depending on the current flow. An alarm is initiated when the preset alarm limit for each filter is exceeded. The required limit value is set on TELLUS' control panel. To calibrate the filters An automatic filter test is activated to measure the initial pressure drop across the filters in the Air handling module. Calibration is carried out when the unit is commissioned and when the filters are changed. Prefilter Prefilters can be used in installations where the extract air or supply air is heavily polluted, in order to prevent the fine filter in the Air handling module from becoming clogged after a short time. The following accessories are required for the prefilter function: Prefilter, TBFA or another type. If another type of prefilter other than TBFA is used, the TBLZ-1-23 pressure sensor can be selected for filter monitoring. The potential for taking readings and setting the alarm limit is available on TELLUS' control panel. Post-filter A post-filter can be used in installations where further filtering of the supply air is required. The following accessories are required for the post-filter function: Post-filter section, TCFB or another type. If another type of post-filter other than TCFB is used, the TBLZ-1-23 pressure sensor can be selected for filter monitoring. The potential for taking readings and setting the alarm limit is available on TELLUS' control panel. TELLUS Airflow adjustments The speed of the fans can be locked for up to 72 hours. This is practical when making air adjustments in the duct system and air diffusers. The desired period is preset, but can be interrupted earlier by selecting STOP in the menu or by changing the time setting to 0. 33

34 Description of the functions Rotary heat exchanger Control The rotary heat exchanger starts up in the event of a heating load. If the heating load increases, the control system regulates the rotation speed of the heat exchanger rotor, variably and linearly to maximum heat recovery. Defrosting In environments where the extract air can occasionally be humid, the defrosting function can be activated to protect the heat exchanger from frosting. The function continuously monitors the condition of the heat exchanger rotor to prevent it from becoming clogged due to condensate that has frozen inside the exchanger. The function requires the connection of a separate pressure sensor. When the function is activated, the pressure drop across the exchanger is continuously measured. If the pressure drop exceeds the preset limit value, a defrosting sequence is carried out. This involves decreasing the rotor speed to allow warm extract air to melt any possible frost. Note that the heat exchanger performs less efficiently while defrosting is in progress and that the supply air temperature will drop downstream of the heat exchanger. / Connection principle for the defrosting function with separate pressure sensor. Exhaust air regulation The exhaust air regulation function can be used whenever TELLUS' exhaust air temperature is not permitted to be below a predetermined value. The function controls the heat exchanger rotor speed (efficiency) in order to limit TELLUS' minimum exhaust air temperature to the required value. The function decelerates the heat exchanger rotor speed from the current level, until the exhaust air temperature reaches the preset minimum permissible setting. Exhaust air regulation requires a separate temperature sensor (TBLZ-1-58-aa; accessory) fitted in the TELLUS unit's exhaust air path. Cooling energy recovery The heat exchanger rotates at max. speed in order to recover the relative cooling energy available inside the premises. It engages when there is a cooling load and when the outdoor air temperature is higher than the extract air temperature. Air purging operation The air purging function prevents clogging of the heat exchanger's air ducts. It engages when TELLUS is in operation but there is no heating load and the heat exchanger is idle. The heat exchanger rotor then rotates for 10 seconds every 10 minutes to perform purging. Carry-over control If the fans are generating low airflows, the rotary heat exchanger is decelerated to an appropriate speed to ensure a correct purging airflow through the heat exchanger. Rotation monitor The rotation monitor sensor continuously monitors the heat exchanger. If a malfunction causes the heat exchanger to stop, an alarm is initiated and TELLUS is stopped if the outdoor temperature is low. Prolonged heat exchanger operation After the unit has been commanded to stop, it takes a while for the fans to come to a complete stop. To prevent the supply air from cooling down when TELLUS is shut down, the rotary heat exchanger automatically continues to rotate for about one minute. Efficiency calculation The efficiency is calculated and displayed (0 100%). 34

35 Description of the functions Heating Heating, air handling The air handling module is supplied with a combined air heater/ air cooler for water. Valves that regulate the cooling or heating media are located in the Hydronic module. A separate control valve steplessly controls the need for heating or cooling. In the event of a heating load, the control valve is governed in sequence with the heat exchanger. The circulation pump operates continuously when the Air handling module is in operation. Heating, supply air Reheating Air heater for hot water The function is used in conjunction with extended control sequence. If there is a heating requirement, the valve and actuator are controlled in sequence with the heat exchanger and regular air heater in the Air handling module. Heating BOOST Heating BOOST means that TELLUS, operating in normal flow regulation mode, increases both the supply airflow and the extract airflow in order to carry more heat into the premises. The fans are allowed to operate in the range between current flow modes (low speed, high speed) and the preset max speed flow. The function only works if the unit is operating in extract air regulation mode. If demand control or boost is selected in combination with heating boost, the flow is controlled by the function that transmits the highest output signal to the fans. This function cannot be combined with pressure regulation. A regulated ramp function begins and increases the airflow if the temperature exceeds its setpoint and it differs by 2-10 K (3 K has been factory preset) from the preset max. supply air temperature. The control reaction speed (ramp time = % flow increase/minute) can be set. The highest possible airflow is restricted by the max. flow. Pump control The circulation pump starts when there is a heating load and if the outdoor temperature is low. Other times, the pump is exercised at regular intervals. Frost guard TELLUS is stopped if there is a danger of freezing inside the air heater. The frost guard function keeps the air heater warm at 13 C while the unit is in operation and at 25 C when TELLUS is switched off. TELLUS Electric air heater The function is used in conjunction with extended heating sequence. If there is a heating requirement, the power to the air heater is controlled in sequence with the heat exchanger and regular air heater in the Air handling module. Post-cooling If the air heater has been in operation, the required postcooling takes place. When TELLUS is stopped, the post-cooling time is three minutes. 35

36 Description of the functions Heating Boosted heating, daytime When the exhaust airflow is not sufficient to remove the surplus cooling energy, the Energy exchange module s bypass damper is opened at the same time as its fan starts up. The total airflow generated by the Air handling module s and the Energy exchange module s fans is always sufficient to remove the surplus energy. As long as the extract airflow is sufficient, the Energy exchange module s fan does not need to be used. This means that EER for the production of heat is significantly higher than with a traditional solution. The combination where the fans in the Air handling module and the Energy exchange module co-operate is unique, and Swegon has applied for a patent for this solution. Heating via radiators, nighttime When radiators are used for heat retention at night, no supply air is required, which means that the Air handling module can be shut off. The Chiller and heat pump module's requirement for recovered energy from the outdoor air is supplied by the Energy exchange module via its bypass damper and fan. In this way, heating or cooling are produced completely independently of the airflow requirement. The design inlet temperature to the radiators is at least 45 C. Heating via radiators and tap water, daytime Temperature of heating and cooling media for radiators, comfort modules or floor heating is demand-controlled via AYC. This leads to significant energy savings as cooling is always performed with water that is as hot as possible and heating is performed with water that is as cool as possible. This entails a considerably better average value for EER and COP, viewed over the year as a whole. Additional heating The additional heating is connected to a heat exchanger in the Hydronic module. The relevant heat exchanger is optional. The additional heating is used to provide support in cases where the Chiller and heat pump module cannot supply the required heating energy, e.g. in the event of a low outdoor temperature. The additional heating may be obtained from district heating, a central heating boiler, etc. Backup heating An electric heater may be placed in TELLUS hot tank and used as backup when the heating pump cannot produce the required heating energy, e.g. in the event of a low outdoor temperature. 36

37 Description of the functions Heating Heating via comfort modules, nighttime When comfort modules are used for heat retention at night, the Recirculation section accessory is required in order to achieve the required driving pressure for the comfort modules without the use of cooling outdoor air. Thanks to the internal Recirculation section, there is no pressure drop across the rotor and supply air filter. In order to produce heating, the outdoor air is recirculated in the Energy exchange module at the same time as the extract air is recirculated in the Recirculation section. The design inlet temperature to the comfort modules is at least 35 C. (Approx. 10 K lower than when heating with radiators) Comparison Night-time heat retention with radiators or comfort modules. 1. The installation of comfort modules is significantly cheaper than installing chilled beams or radiators. 2. The servicing and maintenance of comfort modules is significantly cheaper than is the case for chilled beams and radiators. 3. Despite the fan energy that is required for the comfort modules' driving pressure, the operating cost for heat retention with comfort modules is significantly cheaper than is the case with radiators.* * Thanks to the low pressure drop in the system at night, very little fan energy is required for the comfort modules' driving pressure. Even if a solution with radiators does not require any fan energy, comfort modules are more energy efficient as the inlet temperature is approx. 10 K lower, which produces a significantly better COP value. See also the study performed by CIT Management Göteborg, Sweden. The needed supply temperature (feed line temp.) is lower for induction units TELLUS Sample calculation PM The COP and ε for induction units are about 0.5 units higher than for radiators 37

38 Description of the functions Cooling Cooling, air handling The air handling module is supplied with a combined air heater/ air cooler for water. Valves that regulate the cooling or heating media are located in the Hydronic module. A separate control valve steplessly controls the need for heating or cooling. In the event of a cooling load, the control valve is governed to achieve the required temperature. The circulation pump operates continuously when the Air handling module is in operation. Cooling, supply air Functions Cooling, min. airflow If the TELLUS unit's airflow is lower that this limit, the cooling function will be blocked. Neutral zone The neutral zone is the temperature where the cooling setpoint is higher than the heating setpoint. The neutral zone prevents cooling and heating regulation from working too close to each other. Controlling cooling for comfort modules See the section for All Year Comfort (AYC). Chiller and heat pump module The chiller's setpoint for the water temperature is controlled by TELLUS and determined by the cooling requirement in the installation. The temperature setpoint from AYC is compared with the regular cooling setpoint for the supply air, and the lower of these values is sent as the setpoint for the chiller. Cooling BOOST Cooling BOOST means that the supply air and extract air airflows are increased to convey more cooling energy to the premises. The flow increase takes place between the current flow and the preset max. flow. This function cannot be combined with pressure regulation. The function can be selected in five variants as follows: Comfort The air cooler/chiller outputs are activated if there is a cooling load. When the temperature exceeds its setpoint and the supply air temperature is within the preset limit, a regulated ramp function begins and increases the flow. The control reaction speed (ramp time = % flow increase/minute) can be set. The highest possible airflow is restricted by the max. flow. Economy Cooling BOOST Economy initially uses a higher airflow to cool the premises, before a start signal is transmitted to the chiller. The function can also operate without the cooling function activated. In the event of a cooling load, the airflows are slowly increased up to preset maximum flow. If the airflows are up to max and there is still a cooing load, the air cooler/chiller is activated. The cooling boost function requires that the outdoor air temperature is at least 2 C lower than the extract air temperature for it to be activated. Normal cooling operation is activated if the temperature difference is too small. Sequence The Cooling BOOST Sequence is used if an air cooler/chiller is sized for a higher than normal cooling flow. If there is a cooling load, the flow is increased up to the preset max. flow before the cooling function is activated. The cooling function is delayed 1 minute after the airflow is increased. The Cooling BOOST Sequence is blocked if no cooling function has been selected. Comfort + Economy The comfort variant and the economy variant can be combined. Economy + Sequence The economy variant and the sequence variant can be combined. 38

39 Description of the functions Cooling Cooling and tap water, daytime When producing cooling, free heating energy is obtained in the system. This energy can be used as a heating medium or hot tap water. If the energy is not needed, it is released via the Energy exchange module. Boosted cooling, daytime When the exhaust airflow is not sufficient to remove the surplus heating energy, the Energy exchange module s bypass damper is opened at the same time as its fan starts up. The total airflow that the Air handling module s and the Energy exchange module s fans generate is always sufficient to remove the surplus energy. As long as the extract airflow is sufficient, the Energy exchange module s fan does not need to be used. This means that EER for the production of cooling is significantly higher than with a traditional solution. The combination where the fans in the Air handling module and the Energy exchange module co-operate is unique, and Swegon has applied for a patent for this solution. Simultaneous cooling and heating production At outdoor temperatures of between 5 C and 15 C, most buildings have a simultaneous cooling and heating requirement. There is always a need for hot tap water. Under these conditions, all recovery functions in TELLUS are used fully, i.e. no or very little energy is obtained from/provided by the outdoor air via the Energy exchange module. In the event of cooling energy production, the need for heating and hot tap water is met by surplus energy, and in the event of heating energy production, the need for cooling is met by surplus energy. This means that the energy requirement (heating or cooling) that is lowest at the time is supplied by TELLUS at no cost. TELLUS Free cooling If there is a cooling requirement indoors and it is relatively cool outdoors, the cooling energy can be obtained for free from outdoors instead of producing cooling energy with the chiller. The cooling energy is then obtained either directly via the ventilation or in waterborne form through the circulation of cold water through the Energy exchange module. 39

40 Description of the functions Moisture in supply and extract air If dehumidification and humidifying are activated at the same time, dehumidification is given priority and the possible setting for humidifying is limited to the same as or lower than the dehumidification control's set value. There is a delay of 5 minutes between the dehumidification control having stopped and humidifying starting up (and vice versa). Dehumidification The dehumidification control governs the moisture in the supply air duct by means of an air cooler and an air heater for reheating. The function requires the air cooler to be installed before the air heater in the supply air duct. The TBLZ humidity sensor is mounted in the supply air duct and connected to TELLUS. Cooling energy is emitted to condense the moisture in the supply airflow, which then is heated to the desired supply air temperature. This causes a reduction in the moisture content of the supply air. The supply air must be cooled to a temperature so that it is below the dew point in order that condensation and dehumidification can take place. See also All Year Comfort under Temperature regulation. Humidifying Evaporative humidification This function is suitable together with an evaporative humidifier (not Swegon). The function requires the IQnomic Plus module TBIQ and the TBLZ-31 humidifier as accessories. The moisture sensor is installed in the extract air or supply air duct. The humidity in the extract air duct (the premises) or the supply air duct is regulated between adjustable start and stop limits. Vapour humidification The function is suitable together with a vapour humidifier (not Swegon) and has variable control via the control signal 0-10 V, as well as a contact function that interlocks the humidifier in the event the TELLUS unit has been shut down, summer night cooling or if the extract air's humidity is more than 10% above the setpoint. The function requires the IQnomic Plus module TBIQ and two TBLZ-31 humidifiers as accessories. The moisture sensor is installed in the extract air or supply air duct. The function keeps the humidity level constant in the extract air duct (the premises) by regulating the humidity in the supply air. In order to prevent the humidity in the supply air being too high, it has a maximum limit. Damper Damper control Control and power supply (230 V) for dampers are provided via the terminal block on the TELLUS control unit. Dampers open when the TELLUS unit is opened and close when the unit is shut down. Readings Using a special Readings menu, it is possible to read current operating values such as flows, temperatures, control sequence output values, the status of inputs and outputs, filter pressure, SFPv values, alarm history, etc. Manual test Manual test operation can take place for testing the inputs and outputs, fans and heat exchanger, etc. Used for installation or troubleshooting to test that wired connections and functions operate correctly. Most alarms, functions and normal control modes will be blocked while manual testing is in progress. 40

41 Description of the functions Alarm settings, air handling module Fire alarms External fire alarm Used for external fire-control equipment. Internal fire alarm The air handling module s internal temperature sensors serve as fire protection thermostats. An alarm is initiated if the supply air temperature sensor registers more than 70 C or when the extract air temperature sensor registers more than 50 C. Fans, in the event of a fire The air handling module's fans can be used for evacuating smoke etc. The activated functions work together with the external fire/smoke function or internal fire alarm. Fan speed in the event of a fire Will be activated automatically if the fans have been activated in event of fire (see above). Makes it possible to restrict the max. speed of the fans. External alarms External alarms 1 and 2 External alarms can be used for external functions. Typical uses: Motor protection for the circulation pump in the heating or cooling circuit. Service alarm actuated by smoke detectors. The time delay is set, as is whether the alarm is to be activated in the event of closure of the circuit or disconnection. Alarm limits Alarm limits can be preset for the following: - Nonconforming supply air temperature. - Min. extract air temperature - Filters. - Heat exchanger. - Service period. Alarm blocking This function makes it possible to activate or block certain alarms, e.g. temperature and flow alarms. TELLUS Alarm Alarms are issued with alarm text and a flashing symbol on the control panel (see figure to the right). The alarm indication is shown in all menu images. A list of current and acknowledged and events is shown in the menu for alarm and event codes (see figure to the right). Alarms that require manual resetting can be reset from the control panel. Alarms that reset themselves automatically will do so as soon as the fault has been remedied. Alarms can also be reset via the communication network. Further information about alarms is available in the Operating and maintenance instructions for TELLUS. The instructions can be found at (com) under Product resources/ System products - TELLUS/Documentation. Alarm indication Alarm and event codes 41

42 Description of the functions Communication The potential for communication and supervision is integrated as standard in the TELLUS system. Communication can be established via Ethernet without software other than an ordinary web browser, such as Internet Explorer. TELLUS is ready to be connected via Modbus TCP for monitoring via the existing system. The following protocols can currently be obtained as standard without an extra communication unit: Modbus TCP. Communication via internal network TELLUS has a built-in web server that makes it possible to communicate with TELLUS via an internal network. This then provides access to a dynamic flow diagram for reading and setting temperatures, flows, etc. All that is needed is an ordinary computer with a web browser, such as Internet Explorer. It is also possible to connect directly to a modem for remote connection. Communication via existing monitoring system The scope available for communication is conditional on the software and its programming. The TELLUS unit itself provides the potential for comprehensive communication of readings, settings and functions. Further information about interfaces, protocols and configuration is available at (com) under Product resources/system products - TELLUS/Documentation. Examples of flow diagrams. Logging function The control system in TELLUS has a built-in logging function for e.g. the temperature of liquids, air and energy consumption. On the control panel and when communicating via the built-in web server, logged values can be read off according to predefined trends. The values are presented in the form of a curve diagram that allows the user to review previous changes. The log files can be saved onto a USB memory or similar, in order subsequently to be opened in Microsoft Excel. Example of presentation of the logging function. 42

43 Description of the functions Other external operating functions Unit in operation Independent contact stops when the TELLUS unit operates at high or low speed. Closes when the unit has stopped or an alarm has tripped. Can e.g. be used to indicate operation. Unit at high speed Independent contact stops when the TELLUS unit operates at high speed. Can e.g. be used to indicate operation. Unit at low speed Independent contact stops when the TELLUS unit operates at low speed. Can e.g. be used to indicate operation. External stopping of unit External disconnection stops the TELLUS unit Provides the potential to stop the unit remotely. External fire/smoke function External disconnection from fire or smoke detector installation stops the TELLUS unit and produces an alarm on the control panel. IQnomic Plus IQnomic Plus is an additional module that is used for extra control functions. Certain specific control functions require this additional module, e.g. solutions for Swegon Solutions. It can also be used for external monitoring. Functions that can be connected to the additional module's terminal block in the event of external monitoring: Flow indication EA Flow indication SA 0-10 VDC as a function of the current flow. External alarm acknowledgement Remote resetting of alarms is possible via external normallyopen contact action. This function works in parallel with the control panel's reset function. Indication Two independent contacts can be selected optionally for indication of two of the following functions: - Cooling BOOST - Heating BOOST - Cooling load - Heating load, heat exchanger - Heating load, reheating - Supply air, reduction - Electric air heater, reduction in output - Intermittent night heating - Summer night cooling - Morning BOOST - Defrosting, rotary heat exchanger TELLUS 43

44 Description of the functions Defrosting In environments where the exhaust air can be humid, the defrosting function for the Energy exchange module's heat exchanger coil can be activated to protect the heat exchanger from frosting. The function continuously monitors the condition of the heat exchanger coil to prevent it from becoming clogged due to condensate freezing inside the coil. When the function is activated, the pressure differential in the heat exchanger coil is measured. When the pressure differential across the coil is too great for a given airflow, hot water is circulated through the coil to melt any frost. This function is completely unique, and Swegon has applied for a patent for it. / Heat exchanger coil Chiller and heat pump module TELLUS has a hot side and a cold side. The brine temperature on either side is controlled by the Chiller and heat pump module and the Energy exchange module. It is possible to connect TELLUS to an external heat source, e.g. district heating or a central heating boiler, as a backup or in addition. When the Chiller and heat pump module is activated, the temperature of the cool side decreases while the temperature on the hot side increases. The intention is normally only to run one of these processes, with the other being a side-effect. However, if there is a simultaneous heating and cooling requirement, the side-effect can be utilised and viewed as free energy. An example of this might be premises that have a simultaneous need for comfort cooling and hot tap water. If the Chiller and heat pump module is primarily working to satisfy the cooling requirement, the heating energy for heating the hot tap water is obtained free of charge. In order to determine when there is a need to raise or lower the temperature of the refrigerant, the temperature requirements of each consumer in the system are compared. The consumers can include a waterborne climate system, the supply air temperature coil, control modules or the hot tap water module. The consumer with the highest demands and highest priority has its temperature requirements satisfied. The remaining consumers may use the given temperature and regulate the capacity with the aid of the flow or shunt valves. One major advantage of TELLUS is that it can supply heating and cooling at the same time, to different systems or parts of systems. When there is a simultaneous requirement for heating and cooling, one of these requirements is always satisfied free of charge. The desired temperature for waterborne climate systems is controlled by All Year Comfort (AYC). AYC bases its temperature requirements on the outdoor temperature. In the event of an increasing outdoor temperature in the case of cooling, the desired temperature decreases on the cold side in TELLUS etc. This entails that the refrigerant does not have an unnecessarily low or high temperature, depending on operating conditions, ensuring lower energy consumption. 44

45 Description of the functions Swegon Solutions Swegon Solutions are special control functions for the whole ventilation system. TELLUS is ideally suited for e.g. Hotel Solution and Office Solution Water. As TELLUS produces heating, cooling and hot tap water at the same time or independently of each other, operating conditions all year round can be served. TELLUS is extremely reliable, compact and energy efficient. For more information, see separate documentation for Swegon Solutions. SuperWise SuperWise controls and monitors an intelligent, demandcontrolled indoor climate. The system can comprise intelligent diffusers, beams, dampers or a combination of these. SuperWise can be selected as an accessory to TELLUS. TELLUS' built-in control equipment, along with SuperWise, is then a total solution for the production and control of the entire indoor climate. SuperWise together with TELLUS is an energy-efficient solution that saves operating costs and the environment. SuperWISE is a system for demand-controlled ventilation that detects the position of each zone damper and optimises TELLUS' pressure rise so that at least one zone damper is always at least 90% open. This reduces TELLUS' power consumption by up to 25% and also contributes to making the ventilation system operate more quietly. For further information, see the SuperWise documentation. TELLUS 45