TECHNICAL NOTE. Compact-I MD series TCAITY-THAITY K20136EN ed.4

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1 K2036EN ed.4 TECHNICAL NOTE series TCAITY-THAITY Air-cooled water chillers and reversible heat pumps with axial fans. Range with hermetic DC brushless Scroll compressors and refrigerant R40A.

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3 Index Index General Features...5 Declared conditions of use...5 New Compact-I range...6 Low consumption chillers... 6 AdaptiveFunction Plus...6 Structural features... 7 Available Installations...7 Electrical Control Board...7 Technical Data...9 TCAITY model...9 THAITY model...0 Energy efficiency at partial loads ESEER index... Electronic controls...2 Serial Connection...3 Perfomance...4 Sound power and pressure levels...5 Functioning limits...6 Dimensions and volume TCAITY THAITY 236 standard set-up, Pump Tank & Pump...7 Dimensions and volume TCAITY THAITY 236 standard set-up, P - ASP witch accessories DS5/RC Dimensions and volume TCAITY THAITY Dimensions and clearances TCAITY THAITY DS and RC00 set-up...8 Clearance and positioning...9 Weights...9 Water connections...20 Use of antifreeze solutions...3 Water circuits TCAITY-THAITY models...32 Electrical connections

4 General Features New Compact-I range Inverter compressor Thanks to inverter technology, Compact-I units are able to modulate heating and cooling capacity continuously over time, adjusting the power supplied to system request minute-by-minute, thus ensuring high efficiency as well as partial loads. Extremely silent Compact-I is characterised by low sound levels that are decreased even further with partial loads. This is possible thanks to the modulating capacity of the compressor and fans, which reduce their speed according to outdoor and load conditions. Moreover, when energy requirement is minimal and the need for more silence increase, for example during night-time operation, via the FDL accessory, it is possible to limit the maximum operation frequency to a pre-established value, having remarkable advantages from an acoustic point of view. Plug&play unit From a hydraulic point of view, the units are available with different fittings in order to be easily coupled to different types of systems. Thanks to the set up with an EC brushless circulator, it is possible to manufacture variable capacity systems that reduce energy costs and simplify the system. EC Fans (accessory) The FI5 accessory is also available for maximum attention to energy saving, which is assembled in brushless fan units. The energy savings in the annual cycle, compared to the standard fans, can reach 50%. Comfort 360 C THAITY units are able to ensure maximum performance both when heating/cooling rooms and for DHW production by means of 3-way diverter valve management. Control from the machine also enables intelligent management of an auxiliary generator (e.g. boiler) or integration (e.g. electrical resistance) to guarantee perfect comfort throughout the year. 4

5 General Features General Features Declared conditions of use The THAITY units are monobloc reversible heat pumps on the cooling circuit with air evaporation/condensation and axial fans. The TCAITY units are air cooled packaged water chillers with axial fans. They are suitable in air conditioning installations and industrial processes where chilled and hot water is required, not for human consumption. The units are designed for outdoor installation. The units comply with the following Directives: 2006/42/EC Machinery Directive; Low voltage Directive 2006/95/EC; Electromagnetic compatibility Directive 2004/08/CE; Pressure equipment directive 97/23/ CEE (PED). Restriction of the use of certain hazardous substances in electrical and electronic equipment 20/65/EU Guide to reading the code "SEES" code "MODEL" code T C A I T Y Water production unit Cooling only H Heat pump Air cooling Inverter scrolltype hermetic compressors High efficency R40A refrigerant gas Number of compressors Approximate heating capacity (in kw) Available Installations: Standard: Installation without pump and without water buffer tank Pump (main circuit): P Installation with pump. P2 Installation with increased static pressure pump. DP Installation with double pump, including an automatically activated pump in stand-by. DP2 Installation with increased static pressure double pump, including an automatically activated pump in stand-by. PI - Set up with pump featuring constant speed control (variable system flow rate). PI2 Set up with pump featuring increased head pressure and constant speed control (variable system flow rate). DPI Set up with double pump, of which one in standby with automatic operation and constant speed control (variable system flow rate). DPI2 Installation with increased static pressure double pump, including an automatically activated pump in stand-by. with continuous speed adjustment (variable capacity of the system). Tank & Pump (main circuit): ASP Installation with pump and water buffer tank. ASP2 Installation with increased static pressure pump and water buffer tank. ASDP Installation with double pump, including an automatically activated pump in stand-by and storage. ASDP2 Installation with increased static pressure double pump, including an automatically activated pump in stand-by and storage. ASPI Set up with pump and tank featuring constant speed control (variable system flow rate). ASPI2 Set up with pump and tank featuring increased pressure head and constant speed control (variable system flow rate). Example: THAITY 245 P Hot and cold water production unit; Air-cooled; 2 Scroll-type hermetic compressors; High efficiency version; R40A refrigerant fluid; Approximate nominal cooling capacity 45 kw; Installation with standard static pressure pump 5

6 General Features New Compact-I range Low consumption chillers energy yield, reliable and versatile A complete and flexible range and... up to four capacity steps New chillers and heat pumps with R40A inverter compressor equipped with the innovative control logic AdaptiveFunction Plus featured throughout the range. Besides optimising compressor activation and the relative operating cycles, the control, developed by RHOSS in collaboration with the University of Padua, allows optimal comfort levels to be achieved in all load conditions and the best performance in terms of energy efficiency during seasonal operation. AdaptiveFunction Plus The new adaptive regulation logic AdaptiveFunction Plus, is an exclusive RHOSS S.p.a. patent that is the result of a long period of collaboration with the University of Padua. The various algorithm processing and development operations were implemented and tested on the new Compact-I range in the R&D Laboratory of RHOSS S.p.a. by means of numerous test campaigns. Objectives To always guarantee optimal unit operation in the system in which it is installed. Evolved adaptivelogic. To achieve the best performance from a chiller and a heat pump in terms of energy efficiency with full and partial loads. Low consumption chillers. Operating logic In general, the actual control logics on chillers/heat pumps do not consider the features of the system in which the units are installed; they usually control the return water temperature and there aim is to guarantee the operation of the chillers, giving less priority to the system requirements. The new AdaptiveFunction Plus adaptive logic contrasts these logics with the objective of optimising chiller operation according to the system characteristics and the actual thermal load. The controller regulates the flow water temperature and adjusts itself according to the operating conditions using: the information contained in the return and flow water temperature to estimate the load conditions, thanks to a particular mathematical function; a special adaptive algorithm that uses this estimate to vary the values and the start-up and switch-off limit values of the compressors; the optimised compressor start-up management guarantees a precision water supply to the user, reducing the fluctuation around the set-point value. Main functions Efficiency or Precision Thanks to the advanced control, the chiller can run on two different regulation settings in order to obtain the best possible performance in terms of energy efficiency and significant seasonal savings or high water temperature precision:. Low consumption chillers: Economy OptionIt is known that chillers work at full load for only a very small percentage of their operating time and at partial load for most of the season. Therefore, the power they must supply generally differs from the nominal design power, and partial load operation significantly affects seasonal energy performance and consumption. This makes it necessary for the unit to run as efficiently as possible with partial loads. The controller therefore ensures that the water flow temperature is as high as possible (when operating as a chiller) or as low as possible (when operating as a heat pump) whilst being compatible with the thermal loads, which means it shifts, unlike traditional systems. This prevents energy waste associated with the unnecessarily onerous chiller temperature levels being maintained, thereby guaranteeing that the ratio between the power to be supplied and the energy to be used to produce it is always optimised. The right level of comfort is finally available to everyone!,2. High precision: Precision Option With this operating method, the unit works at a fixed set-point. Therefore, the Precision option guarantees precision and reliability in all applications that require a controller that guarantees a more accurate constant water supply temperature, and where particular humidity control is required. However, it is always recommended to use a storage tank with greater system water content in process applications to guarantee high system thermal inertia. 6

7 Structural features TCAITY-THAITY models Structural features Load-bearing structure and panels in galvanised and RAL 908 painted sheet metal; galvanised steel sheet metal base. Hermetic rotary Scroll compressors. The first compressor with inverter drive, the second one coupled in tandem at a fixed speed for control of the variable capacity from 27% to 03% of the nominal power, with reduction of the inrush current during start-up and power factor correction of the automatic utility towards the mains. They are complete with external thermal protection and crankcase heater activated automatically when the unit stops (as long as the electrical supply to the unit is preserved). Adequately insulated, braze-welded plate water side heat exchange in stainless steel complete with anti-freeze heater. Air side exchanger composed of coil with copper pipes and aluminium fins. Complete with protection grille. Electric helical fans with external rotor, supplied with internal circuit breaker protection and complete with protection mesh. Proportional electronic device for pressure regulation and continuous regulation of the rotation speed of the fans. Male threaded hydraulic connections. Water heat exchanger differential pressure switch that protects the unit from any water flow interruptions. Outdoor air temperature probe. Cooling circuit made with an annealed copper pipe (EN ) complete with: dryer filter, load connections, high pressure side pressure switch, pressure transducer on both the high and low pressure sides, electronic thermostatic expansion valve, cycle inversion valve (for THAITY only), liquid receiver (for THAITY only), gas separator and check valve. Unit with IP24 protection rating. Control with AdaptiveFunction Plus operation. The unit is complete with a charge of R40A refrigerant. Available Installations Standard: Installation without pump and without water buffer tank Pump (main circuit): P Installation with pump. P2 Installation with increased static pressure pump. DP Installation with double pump, including an automatically activated pump in stand-by. DP2 Installation with increased static pressure double pump, including an automatically activated pump in stand-by. PI - Set up with pump featuring constant speed control (variable system flow rate). PI2 Set up with pump featuring increased head pressure and constant speed control (variable system flow rate). DPI Set up with double pump, of which one in standby with automatic operation and constant speed control (variable system flow rate). DPI2 Installation with increased static pressure double pump, including an automatically activated pump in stand-by. with continuous speed adjustment (variable capacity of the system). Electrical Control Board The electrical panel can be accessed by opening the front panel, in compliance with IEC Standards in force; it can be opened and closed using specific tools. It features a thermostat-controlled cooling fan. Complete with: electrical wiring for 400V-3ph+N-50Hz power supply voltage; auxiliary circuit power supply 230V-ph+N-50Hz derived from main power supply; general main power supply switch with interlocking safety door isolator; inverter compressor protection fuses circuit breaker to protect the fixed speed compressor; protection fuse for the auxiliary circuit; Remote unit controls: remote on/off (SCR), remote summer/winter (SEI), CGA auxiliary generator control (boiler), KT integrative generator control, unit forced drain (FDL), lock lamp (LBG) and compressor operation lamps (LFC); remote machine commands and controls. Programmable electronic board with microprocessor, controlled by keyboard inserted in the machine or by using the remote keyboard (KTR) controlled up to 50 metres: Use the KR200 kit for distances greater than 50 m up to 200 m. This electronic board performs the following functions: regulation and control of the unit outlet water temperature settings; of the cycle inversion; of the safety timers; of the circulation pump; of the system compressor and pump hour-run meter; of the electronic anti-freeze protection which cuts in automatically when the machine is switched off; and of the functions which control the operations of the individual parts making up the machine; complete protection of the unit, possible shutdown and display of all the triggered alarms; total compressor and inverter protection by means of continuously monitoring the current absorbed by the compressor and operating pressures. The compressor can modulate automatically, regardless of the request if it goes out of its proper field of operation. multi-language display management (Italian, English, French, German, Spanish); electronic expansion valve management (EEV); management of compressor discharge temperature and inlet and flow pressures; display the programmed set-points via the display; the in/out water temperature via the display; the alarms via the display; the chiller or heat pump operation via Led; self-diagnosis with continual checking of the machine oeprational status; user interface menu; alarm code and description; alarm history management (menu protected by factory password). In particular, for every alarm, the following are memorised: date and time of intervention; alarm code and description; in/out water temperature values as soon as the alarm was triggered; alarm delay time from the switch-on of the connected device; compressor status at the time of the alarm; Tank & Pump (main circuit): ASP Installation with pump and water buffer tank. ASP2 Installation with increased static pressure pump and water buffer tank. ASDP Installation with double pump, including an automatically activated pump in stand-by and storage. ASDP2 Installation with increased static pressure double pump, including an automatically activated pump in stand-by and storage. ASPI Set up with pump and tank featuring constant speed control (variable system flow rate). ASPI2 Set up with pump and tank featuring increased pressure head and constant speed control (variable system flow rate). 7

8 Structural features Advanced functions: set-up for serial connection (KRS485, KFTT0, KBE, KBM, KUSB accessory); possibility of having a digital input for remote management of the double set-point; possibility of having a discrete input for total recovery management (RC00), the desuperheater (DS) or for the production of domestic hot water by means of a 3-way diverter valve (VDEV). In this case, there is the possibility of using a temperature probe instead of the discrete input (see specific section for more information); possibility to have an analogue input for the shifting set-point via a 4-20mA remote signal; configured to manage time slots and work parameters with the possibility of daily/weekly operation planning; check-up and verification of the scheduled maintenance status; computer-assisted unit testing; self-diagnosis with continual checking of the machine oeprational status. Set-point regulation via the AdaptiveFunction Plus with two options: fixed set-point (Precision option); set-point slidinge (Economy options). Compressor drive control serial connection to the programmable electronic board. TCAITY-THAITY Accessories Factory Fitted Accessories FDL Forced Download Compressors Function. Compressor modulation to limit the absorbed current and power (digital input). Also used as a "night mode" function to limit noise during night-time operation SIL Silenced set-up (sound-proof compressor compartment + compressor ear muff) FI5 Condensation control with fans featuring brushless EC motor with constant speed control up to the outside air temperature of -5 C RAE - 27W electric pump antifreeze heater (available for P-P2- PI-PI2- ASP-ASP2-ASPI-ASPI2 set ups); prevents the risk of the water inside the pump becoming ice when the machine is switched off (provided the unit remains powered) RAE2-27W double electric pump antifreeze heater (available for DP-DP2- DPI-DPI2- ASDP-ASDP2 set ups); prevents the risk of the water inside the pump becoming ice when the machine is switched off (provided the unit remains powered) RAS - 300W antifreeze electric heater for water buffer tank (available for ASP- ASP2 -ASDP -ASDP2 -ASPI- ASPI2 installations); to prevent the risk of ice formation in the water buffer tank when the machine is switched off (as long as the unit is not disconnected from the power supply) RAB Base antifreeze heater (THAITY) RAP Unità con batterie di condensazione rame/alluminio preverniciato BRR Unit with pre-painted copper/aluminium condensation coils BRH - Units with copper/aluminium condensing coils with hydrophilic treatment (for THAITY) V3V Unit complete with 3-way diverter valve for the production of domestic hot water. Available only with PUMP set-up single electric pump, not available with DS and RC00 DSP Double set-point via digital consensus (incompatible with the CS accessory) Only with Precision setting CS Scrolling set point via analogue signal 4-20 ma (incompatible with the DSP accessory). Only with Precision setting. DS - Desuperheater. Also active during winter operation for THAITY RC00 - Heat recovery unit with 00% recovery LDK - Refrigerant leak detector EEM Energy Meter. Measure and display values of the electrical units - See specific section for more information GM - Refrigerant circuit high and low pressure gauges. Accessories supplied separately KSA Rubber anti-vibration mountings KFA Water filter KT Additional electrical resistance for heat pump, controlled by regulation KVDEV 3-way valve in protective casing for the production of domestic hot water, managed by the setting. Available only with Pump set up, not available with V3V set up mounted KEAP Outdoor air temperature probe for set-point compensation (as an alternative to the outdoor temperature probe fitted), incompatible with the CS accessory KTRD - Thermostat with display KTR Remote keypad for control at a distance with LCD display and same functions as the machine. Connection must be made with a 6-wire telephone cable (maximum distance 50 m) or with KRJ220/ KRJ230 accessories. For greater distances up to 200 m, use an AWG 20/22 shielded cable (4 wires+shield, not supplied) and the KR200 accessory KRJ220 Connection cables for KTR (20 m length) KRJ230 - Connection cables for KTR (30 m length) KR200 - Remote Control Kit for the KTR accessory for distances greater than 50 m and up to 200 m (AWG shielded cable not supplied) KRS485 - RS485 interface for serial communication with other devices (proprietary protocol; Modbus RTU protocol) KFTT0 - LON interface for serial communication with other devices (LON protocol) KBE - Ethernet interface for serial communication with other devices (BACnet IP protocol) KBM - RS485 interface for serial communication with other devices (BACnet MS/TP protocol) KUSB - RS485/USB serial converter (USB cable supplied) 8

9 Technical Data Technical Data Table A : Technical Data TCAITY model Application with fan coil Cooling capacity MIN/NOM/MAX () kw /34,5/35,4 4,8/46,/47,3 6,/50,3/5,6 8,2/58,6/60,2 ESEER + 5,07 4,69 5,00 4,93 Nominal cooling capacity () (*) EN 45:203 kw /34,3/35,2 4,7/45,7/46,9 6/50/5,3 8,2/58,3/59,9 EER EN 45:203 () (*) 2,56 2,96 2,96 2,7 ESEER EN 45:203 4,6 4,9 4,23 4,48 Application radiant Cooling capacity MIN/NOM/MAX (3) kw 3,7/4,5/43, 8,5/55,9/58, 20/60,9/63,3 24,3/75,5/78,6 Nominal cooling capacity (3) (*) EN 45:203 kw 3,6/4,2/42,8 8,4/55,4/57,5 20/60,4/62,8 24,3/75/78 EER EN 45:203 (3) 3,27 3,58 3,72 3,67 Sound pressure (5) ( ) db(a) Sound power (6) ( ) db(a) Scroll compressor () In the following conditions: Condenser inlet air temperature 35 C; chilled water temperature 7 C; temperature differential at evaporator 5 C. (3) In the following conditions: Condenser inlet air temperature 35 C; chilled water temperature 8 C; temperature differential at evaporator 5 C. (5) Sound pressure level in db(a), referring to a 5 m distance from the unit, with directionality factor = 2. Scroll regulated by inverter Fans n x kw x 0,6 2 x 0,6 2 x 0,6 2 x 0,6 Heat exchanger water content l 3,8 3,8 4,4 5, Heat exchanger nominal flow water side () l/h Water side heat exchanger nominal pressure drops () kpa Residual head (P/PI mounting) () kpa Residual head (P2/PI2 mounting) () kpa Residual head (ASP/ASPI mounting) () kpa Residual head (ASP2/ASPI2 mounting) () kpa Nominal heating capacity RC00 (±) kw 40, ,8 Nominal flow rate/pressure drop RC00 (±) m³/h/kpa,3 / 2,7 / 2,8 / 6 2, / 6 Nominal heating capacity DS (±) kw 4,6 9,4 20,6 24,2 Nominal flow rate/pressure drop DS (±) m³/h/kpa 6,9 / 45 9,3 / 46 0,8 / 49 2 / 46 Tank water content l Amount of R40A refrigerant kg 9,7,3 8,5 9,83 Type / Amount of Oil l PVE (FV68S)/ 3.4 PVE (FV68S)/ 3.4 PVE (FV68S)/ 3.4 POE (60SZ) / 6.6 Electrical data Absorbed power in summer mode NOM () ( ) kw 3,2 5, 6,6 2,2 Absorbed power in summer mode NOM (3) ( ) kw 2,3 4,9 5,8 9,9 Pump absorbed power (P/ASP / PI/ASPI) kw,04,04,04,04 Pump absorbed power (P2/ASP2 / PI2/ASPI2) kw,73,73,73,73 Electrical power supply V-ph-Hz Water outlet Auxiliary power supply V-ph-Hz Nominal current ( ) A 26,4 32,2 36, 45,4 Maximum current ( ) A 32,3 4 42,4 54,5 Starting current ( ) (7) A Pump absorbed current (P/ASP / PI/ASPI) A,86,86,86,86 Pump absorbed current (P2/ASP2 / PI2/ASPI2) A 3,5 3,5 3,5 3,5 Dimensions Width mm Height mm Depth mm Water connections Ø (±) Recovery unit heating capacity Conditions referring to the unit operating with chilled water temperature 7 C, differential temperature due to evaporation of 5 K, hot water temperature produced equivalent to 40/45 C (RC00) 50/60 C (DS). NB. With heat pumps operating in winter mode with DC active, the heating capacity available is decreased from the portion supplied to the desuperheater. ( ) Current absorbed by compressors and fans. (6) Sound power level in db(a) on the basis of measurements taken in accordance with UNI EN-ISO 964 and Eurovent 8/ Standards. (7) The value of the inrush current is valid upon the activation of the second compressor (Fix Speed Compressor). ( ) Power absorbed by compressors and fans. (*) The data according to EN 45 refer to the Standard set up. Refer to the section "Technical Note Attachments" for information relating to the Pump and Tank&Pump set up. ( ) With the SIL accessory, the value decreases by 3dB(A). ESEER (European Sesonal EER) European average seasonal efficiency. ESEER+ with AdaptiveFunction Plus logic. 9

10 Technical Data Table A : Technical Data THAITY model Application with fan coil Cooling capacity MIN/NOM/MAX () kw /34,5/35,4 4,8/46,/47,3 6,/50,3/5,6 8,2/58,6/60,2 ESEER + 5,07 4,69 5,00 4,93 Nominal cooling capacity () (*) EN 45:203 kw /34,3/35,2 4,7/45,7/46,9 6/50/5,3 8,2/58,3/59,9 EER EN 45:203 () (*) 2,56 2,96 2,96 2,7 ESEER EN 45:203 4,6 4,9 4,23 4,48 Heating capacity MIN/NOM/MAX (2) kw 8,8/39,6/40,9 0,4/50,/5,8 3/56,/57,8 4,/68,5/70,9 Nominal heating capacity (2) (*) EN 45:203 kw 8,9/39,9/4,2 0,4/50,5/52,3 3/56,5/58,2 4,/68,9/7,3 COP EN 45:203 (2) (*) 3,22 3,30 3,23 3,20 Application radiant Cooling capacity MIN/NOM/MAX (3) kw 3,7/4,5/43, 8,5/55,9/58, 20/60,9/63,3 24,3/75,5/78,6 Nominal cooling capacity (3) (*) EN 45:203 kw 3,6/4,2/42,8 8,4/55,4/57,5 20/60,4/62,8 24,3/75/78 EER EN 45:203 (3) 3,27 3,58 3,72 3,67 Heating capacity MIN/NOM/MAX (4) kw 9,7/38,5/40,2 2/50,2/52,5 3,9/53,7/56 6,2/68,9/72, Nominal heating capacity (4) (*) EN 45:203 kw 9,7/38,8/40,5 2/50,6/53 3,9/54,/56,4 6,3/69,3/72,6 COP EN 45:203 (4) (*) 3,78 3,85 3,90 3,84 Energy class ( ) A++ A++ A++ A++ Sound pressure (5) ( ) db(a) Sound power (6) ( ) db(a) Scroll compressor Scroll regulated by inverter Fans n x kw x 0,6 2 x 0,6 2 x 0,6 2 x 0,6 Heat exchanger water content l 3,8 3,8 4,4 5, Heat exchanger nominal flow water side () l/h Water side heat exchanger nominal pressure drops () kpa Water side heat exchanger nominal pressure drops (2) kpa Residual head (P/PI mounting) () kpa Residual head (P2/PI2 mounting) () kpa Residual head (ASP/ASPI mounting) () kpa Residual head (ASP2/ASPI2 mounting) () kpa Nominal heating capacity RC00 (±) kw 40, ,8 Nominal flow rate/pressure drop RC00 (±) m³/h/kpa,3 / 2,7 / 2,8 / 6 2, / 6 Nominal heating capacity DS (±) kw 4,6 9,4 20,6 24,2 Nominal flow rate/pressure drop DS (±) m³/h/kpa 6,9 / 45 9,3 / 46 0,8 / 49 2 / 46 Tank water content l Amount of R40A refrigerant kg 9,7,3 8,5 9,83 Type / Amount of Oil l PVE (FV68S)/ 3.4 PVE (FV68S)/ 3.4 PVE (FV68S)/ 3.4 POE (60SZ) / 6.6 Electrical data Absorbed power in summer mode NOM () ( ) kw 4,/3,2/3,3 5,/5,/5,2 5,5/6,6/6,8 6,8/2,2/2,4 Absorbed power in winter mode NOM (2) ( ) kw 2/2,/2,6 2,7/4,9/5,6 3,4/7,/7,8 3,6/2,/22 Absorbed power in summer mode NOM (3) ( ) kw 4,4/2,3/2,3 5,5/4,9/5 5,9/5,8/5,9 7,3/9,9/9,9 Absorbed power in winter mode NOM (4) ( ) kw 2/0/0,5 2,8/2,7/3,4 3,/3,5/4,2 3,6/7,6/8,5 Pump absorbed power (P/ASP) / (PI/ASPI) kw,04,04,04,04 Pump absorbed power (P2/ASP2) / (PI2/ASPI2) kw,73,73,73,73 Electrical power supply V-ph-Hz Water outlet Auxiliary power supply V-ph-Hz Nominal current ( ) A 26,4 32,2 36, 45,4 Maximum current ( ) A 32,3 4 42,4 54,5 Starting current ( ) (7) A Pump absorbed current (P/ASP) / (PI/ASPI) A,86,86,86,86 Pump absorbed current (P2/ASP2) / (PI2/ASPI2) A 3,5 3,5 3,5 3,5 Dimensions Width mm Height mm Depth mm Water connections Ø () In the following conditions: Condenser inlet air temperature 35 C; chilled water temperature 7 C; temperature differential at evaporator 5 C. (2) In the following conditions: Evaporator inlet water temperature 7 C B.S., 6 C B.U.; hot water temperature 45 C; temperature differential at evaporator 5 C. hot water temperature produced equivalent to 40/45 C (RC00) 50/60 C (DS). NB. With heat pumps operating in winter mode with DC active, the heating capacity available is decreased from the portion supplied to the desuperheater. ( ) Current absorbed by compressors and fans. 0 (3) In the following conditions: Condenser inlet air temperature 35 C; chilled water temperature 8 C; temperature differential at evaporator 5 C. (5) Sound pressure level in db(a), referring to a 5 m distance from the unit, with directionality factor = 2. (6) Sound power level in db(a) on the basis of measurements taken in accordance with UNI EN-ISO 964 and Eurovent 8/ Standards. (7) The value of the inrush current is valid upon the activation of the second compressor (Fix Speed Compressor). (±) Recovery unit heating capacity Conditions referring to the unit operating with chilled water temperature 7 C, differential temperature due to evaporation of 5 K, ( ) Power absorbed by compressors and fans. (*) The data according to EN 45 refer to the Standard set up. Refer to the section "Technical Note Attachments" for information relating to the Pump and Tank&Pump set up. ( ) With the SIL accessory, the value decreases by 3dB(A). ESEER (European Sesonal EER) European average seasonal efficiency. ESEER+ with AdaptiveFunction Plus logic ( ) In average climatic conditions according to Regulation n 8/203

11 Energy efficiency at partial loads Energy efficiency at partial loads ESEER index The E.E.R. index represents an estimate of the energy efficiency of the cooling unit in nominal design conditions. In reality, the operating time of a chiller in nominal conditions is usually less than the operating time in partial load conditions. E.S.E.E.R. index (European Seasonal E.E.R.) is an index that estimates the average seasonal energy efficiency of the cooling unit in four load and water temperature conditions. Generally, two chillers with the same E.E.R. value can have different E.S.E.E.R. values. In fact, for a water-cooled cooling unit, the average energy efficiency depends on the design choices and the temperature of the water entering the condensing exchanger. The E.S.E.E.R. energy index introduced by the European Community (E.E.C.C.A.C. project - Energy Efficiency and Certification of Central Air Conditioners), is characterized by the water temperatures (see table B ) and by the energy weights that are assigned to the four load conditions considered in the calculation: 00%, 75%, 50% and 25%. 3*EER00%+ 33*EER75%+ 4*EER50%+ 23*EER25% ESEER 00 where EER00%EER75%EER50%EER25% represent the efficiencies of the cooling unit in the four load conditions and at the temperatures indicated in table B" The data is calculated by using the Eurovent method. Table "B": load and condenser inlet air temperature conditions Load ESEER 00% 35 C 75% 30 C 50% 25 C 25% 20 C New seasonal efficiency indices according to EN 4825: SCOP and SEER Standard EN 4825 defines the calculation method to determine the summer (SEER) and winter (SCOP) seasonal efficiency indices of heat pumps, summing the machine's performance in one value that considers the temperature variations of outdoor air, water produced, and partialisation degree of the compressor. These indices are useful to calculate the system's building system energy efficiency that services the unit. SCOP heating seasonal efficiency of an air-water heat pump in compliance with EN4825, is according to the following variables: VAABLE Project temperature: User side water temperature: Compressor partialisation degree Outdoor air temperature frequency occurrence Bivalent T DESCPTION Europe divided into 3 climate bands: Colder (Helsinki climate): -22 C Average (Strasbourg climate): -0 C Warmer (Athens climate): 2 C Radiant panel: 35 C fixed or variable according to the outdoor air temperature Fancoil: 45 C fixed or variable according to the outdoor air temperature Radiators: 55 C fixed or variable according to the outdoor air temperature The standard considers, with due coefficient corrective features, the inefficiency of partial loads with "On-Off" operation of the heat pumps. The number of hours of occurrence of each outdoor air temperature value expressed in degrees, during the heating season. Temperature at which pdc fulfils the load at 00%. Colder (Helsinki climate): -7 C or lower Average (Strasbourg climate): 2 C o più bassa Warmer (clima di Atene): 7 C or lower SCOP is calculated by using the Bin Method as an average weight of efficiency (COP) of the heat pump on the frequency of occurrence of outdoor air temperature. Even the seasonal efficiency in SEER cooling mode depends on a unique design temperature and is indicated for 2 types of distribution: Radiant panel (Water T at a fixed point equivalent to 8 C). Fan coil (water T at a fixed point equivalent to 7 C or variable according to the outdoor air temperature) The SCOP and SEER values of units are shown in the section "Technical Notes Attached", which refer to applications with radiant panels and, with regard to SCOP, to Average climate. Thanks to the variation in temperature of the water produced according to the outdoor air temperature and Inverter DC technology, the values of efficiency are particularly high.

12 Electronic controls Electronic controls Electronic controls The keyboard with display makes it possible to view the working temperature and all the unit process variables, as well as providing access to setting parameters for the operating set points and their modification. For purposes of technical assistance, it allows password- protected access to the unit's management parameters (access for authorised personnel only). KTR - Remote keyboard The remote keyboard with display (KTR) allows the remote control and display of all of the unit's digital and analogue process variables. It is therefore possible to control all the machine functions directly in the room. It allows setting and management of time periods.! Prg Esc! DISPLAY: displays the numbers and the values of all the parameters (i.e. outlet water temperature etc.), any alarm codes and resource status by means of strings. ALARM key: makes it possible to display the code and reset any alarms. PRG key: makes it possible to programme the machine's fundamental functioning parameters. ON/OFF key: makes it possible to switch the unit on and off. UP key: used to scroll through the list of parameters, statuses and any alarms; makes it possible to modify set points MODE/ENTER key makes it possible to switch from chiller to heat pump operation and vice versa. DOWN key: used to scroll through the list of parameters, statuses and any alarms; makes it possible to modify set points Prg Esc DISPLAY: displays the numbers and the values of all the parameters (i.e. outlet water temperature etc.), any alarm codes and resource status by means of strings. ALARM key: makes it possible to display the code and reset any alarms PROGRAM key: makes it possible to programme the machine's fundamental functioning parameters ESC key: makes it possible to switch the unit on and off UP key: used to scroll through the list of parameters, statuses and any alarms; makes it possible to modify set points ENTER key:allows confirmation of the selected parameters DOWN key: used to scroll through the list of parameters, statuses and any alarms; makes it possible to modify set points Note: The temporary presence of two devices, on-board machine keyboard and remote keyboard, will cause the on-board machine terminal to be disabled. 2

13 Serial Connection Serial Connection Serial Connection All units are equipped with an electronic controller to communicate with an external BMS via a serial communication line by means of the SS RS485 serial interface accessory (proprietary protocol or ModBus RTU) and the following converters: KUSB RS485/USB serial converter; Also available are FTT0 accessory (LON protocol), KBE accessory, Ethernet interface - KBM accessory - RS485 interface (BACnet MS/TP protocol). Supervision In general, a supervision system allows access to all unit functions, such as: making all settings which are accessible through the keyboard; reading all process variables of the inputs and outputs, whether digital or analogue; reading the various alarm codes which are present, and resetting them as necessary. RS485 RS485 RS485 KUSB Clock card The clock board, assembled by default, enhances unit flexibility and efficiency, displaying the date/time and allowing machine management with daily and weekly start/stop time bands, with the possibility of changing the set-points. The time bands are set and managed via the keyboard. Prg Example of display Esc 3

14 Perfomance Residual head and pressure drops TCAITY - THAITY Dp [kpa] Graph : pressure drops in heat exchangers Q [mc/h] Calculation of Pressure Drops The water flow rate at the exchanger is calculated according to the following formula: G = (Q x 860) : ΔT Where: G (l/h) = water flow rate in the exchanger; Q (kw) = exchanged power, which could be QF (for the evaporator) or QT (for the condenser), according to the given heat exchanger; ΔT ( C) = temperature differential; The pressure drops can be obtained using RHOSS software, read on the graph at the side or calculated with the following approximate formula: Δpw = Δpw nom x (G : G nom )² Nota bene: For all machines, refer to the admissible operating limits and thermal differences (ΔT). Δpw (kpa) = nominal pressure drop at the given heat exchanger (Technical data table); G (l/h) = water flow rate at the given heat exchanger; Dp [kpa] Graph 3 : Residual head unit P Q [mc/h] Dp [kpa] Graph 3 : Residual head unit P Q [mc/h] Graph 3 : Residual head unit ASP Graph 3 : Residual head unit ASP2 Dp [kpa] Q [mc/h] Dp [kpa] Q [mc/h] 4

15 Perfomance Perfomance By means of the RHOSS Up To Date software selection, you are able to obtain:. Unit performance data according to design conditions (a summary is also available in the section Technical Note Attachments ); 2. Technical data of the selected unit, heat exchanger pressure drops and residual head if the unit is supplied with pumps; 3. Performance data of RC00 and DS heat recovery. 5

16 Perfomance Sound power and pressure levels Model TCAITY THAITY Sound power level in db for octave bands Sound pressure level in db(a) 25 Hz 250 Hz 500 Hz 000 Hz 2000 Hz 4000 Hz 8000 Hz Lw db(a) Lp 5m Lw Sound power level in db(a) on the basis of measurements taken in accordance with UNI EN-ISO 964 and Eurovent 8/ Standards. Lp Sound pressure level in db(a) referring to the distance indicated, with a directionality factor equal to 2. Note: The Eurovent certification refers to the sound power value in db(a) and it is the only binding acoustic data. The sound pressure levels refer to values calculated from the sound power for units installed in free field with directionality factor Q=2. It is not possible to extrapolate sound pressure values for distances less than 0 m. With outdoor air temperatures below 35 C, the machine decreases its noise to a value below the nominal value indicated in the table. SIL accessory: With the SIL accessory, sound pressure must be corrected by 2dBA. FDL accessory - Forced download compressors The FDL accessory (forced reduction of the power consumed by the unit) allows power consumption to be restricted according to the utility requirements. It is possible to use the FDL - Forced Download Compressors with "night mode" to reduce noise during night-time operation, by limiting compressor operation to its maximum frequency value. The function, which can be set from the unit display, can be enabled via a digital signal, using time bands or as an input in the case of a serial connection with an external BMS via Modbus. In the presence of the EEM accessory, which allows the power consumed to be instantaneously measured, a specific maximum consumed power value can be set and any utility requirement complied with. EEM accessory - Energy Meter The EEM accessory allows certain unit features, such as those below, to be measured and displayed: Power supply voltage and instantaneous current consumption of the unit Instantaneous electric power consumed by the unit Instantaneous power factor of the unit Electricity consumption (kwh) If the unit is connected via a serial network to a BMS or external supervisory system, the trends of the measured parameters can be stored and the operating status of the unit itself checked. Attention: in order to use the EEM accessory, the unit must be powered with 400V-3ph + N 50Hz 6

17 Functioning limits Functioning limits T ( C) Summer mode Winter mode t ( C) In summer mode: Maximum water inlet temperature 25 C. Permitted temperature differentials through the heat exchangers Temperature differential at the evaporator ΔT = 4 8 C. Minimun water pressure 0,5 Barg. Maximum water pressure: 6 Barg Permitted temperature differentials through the heat exchangers In winter mode: Maximum water inlet temperature 55 C Temperature gradient on the condenser ΔT = 4 8 C. Minimun water pressure 0,5 Barg. Maximum water pressure: 6 Barg T ( C) t ( C) Outdoor air temperature (D.B.) Temperature of the water produced Standard functioning. Functioning with condensing control FI5 In the permitted field of operation, the compressor and inverter are protected by a controller by means of continuous monitoring of the current absorbed by the compressor, operating pressure and output temperature. The compressor can modulate the rotation speed automatically, regardless of the set-point request if it goes out of its proper field of operation. 7

18 OFF ON 0 OFF I ON Dimensions and volume Dimensions and volume TCAITY THAITY 236 standard set-up, Pump Tank & Pump p 6 6 c a l 5 e o n m l b f d g h i. Control panel; 2. Isolator; 3. Electrical Control Board; 4. Compressor; 5. Pump (P - ASP installation); 6. Fan; 7. Anti-vibration support (KSA accessory); 8. Coil; 9. Protection network; 0. Expansion vessel;. Power supply inlet; 2. Water inlet; 3. Water outlet; 4. Manometer; 5. Storage tank drain (ASP installation); 6. Condensate drain (THAETY models); 7. Storage tank (ASP installation). Model a b c d e f g h i l m n o p 236 mm Dimensions and volume TCAITY THAITY 236 standard set-up, P - ASP witch accessories DS5/RC00 b c a 4 4 g e d f 8 h i l 8 m l n o p. Control panel; 2. Isolator; 3. Electrical Control Board; 4. Compressor; 5. Water inlet recovery; 6. Exit recovery water; 7. Main heat exchanger water inlet; 8. Main heat exchanger water outlet; 9. Manometer; 0. Power supply inlet;. Pump housing (ASDP installation); 2. Pump housing (P - ASDP installation); 3. Storage tank (ASP ASDP installation); 4. Expansion vessel; 5. Water system drain; 6. Fan; 7. Finned coil; 8. Anti-vibration support. Model a b c d e f g h i l m n o p 236 mm

19 OFF ON OFF ON Dimensions and volume Dimensions and volume TCAITY THAITY b c a d 4 4 e f g h 6 i h l m n. Control panel; 2. Isolator; 3. Electrical Control Board; 4. Compressor; 5. Water inlet; 6. Water outlet; 7. Manometer; 8. Power supply inlet; 9. Pump housing (ASDP installation); 0. Pump housing (P - ASDP set up);. Storage tank (ASP ASDP installation); 2. Expansion vessel; 3. Water system drain; 4. Fan; 5. Finned coil; 6. Anti-vibration support (KSA accessory). Model a b c d e f g h i l m n 245 mm mm mm Dimensions and clearances TCAITY THAITY DS and RC00 set-up b c a 4 4 g e d f 8 h i l 8 m l n o p. Control panel; 2. Isolator; 3. Electrical Control Board; 4. Compressor; 5. Water inlet recovery; 6. Exit recovery water; 7. Main heat exchanger water inlet; 8. Main heat exchanger water outlet; 9. Manometer; 0. Power supply inlet;. Pump housing (ASDP installation); 2. Pump housing (P - ASDP installation); 3. Storage tank (ASP ASDP installation); 4. Expansion vessel; 5. Water system drain; 6. Fan; 7. Finned coil; 8. Anti-vibration support. Model a b c d e f g h i l m n o p 245 mm mm mm

20 Clearance and positioning Clearance and positioning TCAITY-THAITY 236 TCAITY-THAITY L L L4 L2 L4 L2 L3 L3 L mm 800 L2 mm 000 L3 mm 800 L4 mm 800 L mm 800 L2 mm 800 L3 mm 000 L4 mm 800 Handling and storage Movement of the unit must be performed with care, in order to avoid damage to the external structure and to the internal mechanical and electrical components. Do not stack units. The temperature limits for storage are C. Installation and connection to the system The unit is designed for outdoor installation. The unit is equipped with male threaded water connections. The unit must be installed with the specified clearances with allowance for the water and electrical connections. The unit can be equipped with anti-vibration mounts upon request (KSA). We recommend installing isolating valves that isolate the unit from the rest of the system. It is mandatory to install a square metal mesh filter (longest side = 0.8 mm) on the unit return pipes. The unit cannot be installed on brackets or shelving. Correct installation and positioning includes levelling the unit on a surface capable of bearing its weight. When the outdoor temperature is around zero, the water normally produced during the coil defrosting could form ice and make the flooring near the unit installation area slippery. Segregate the units if installed in areas accessible to persons under 4 years of age. However it is installed, the coil inlet air temperature (ambient air) must remain within the set limits. Weights Model TCAITY kg THAITY kg TCAITY P-P2 kg THAITY P-P2 kg TCAITY DP-DP2 kg THAITY DP-DP2 kg TCAITY ASP-ASP2 kg THAITY ASP-ASP2 kg TCAITY ASDP-ASDP2 kg THAITY ASDP-ASDP2 kg TCAITY PI-PI2 kg THAITY PI-PI2 kg TCAITY DPI-DPI2 kg THAITY DPI-DPI2 kg TCAITY ASPI-ASPI2 kg THAITY ASPI-ASPI2 kg TCAITY ASDPI-ASDPI2 kg THAITY ASDPI-ASDPI2 kg DS5 kg BRH RC00 accessory Finned coil with kg hydrophilic 60 60treatment The weights refer to packed units without water. The weight of the unit at full load is obtained by adding the weight of the tank water content Model Tank capacity l The finned coil with hydrophilic treatment is recommended in THAITY heat pumps. The surface treatment ensures better drainage of the water condensed on the finned surface, favouring the reduction of the number of required defrost cycles during winter operation. 20 KEAP accessory - remote controlled outdoor air probe For correct shifting temperature adjustment of water coming out of the heat pump, it is important that the air temperature has a significant value and is not influenced by the incorrect position of the sensor/unit." The unit is equipped with an outdoor air temperature sensor located next to the fin-packed heat exchanger. If the unit is installed facing the sun and outdoor air temperature reading is therefore altered, it is possible to connect the KEAP remote control outdoor air probe accessory. This requires the following operation: purchase the KEAP accessory disconnect the outdoor air probe from the board and connect the remote control sensor to the same clamps, following the relative instructions on the instruction sheet.

21 Water connections Water connections Connection to the system The unit is equipped with male threaded hydraulic connections and manual air vent valve placed outside the cabinet. It is advisable to install shut-off valves that isolate the unit from the rest of the system. It is mandatory to install a square metal mesh filter (longest side = 0.8 mm) on the unit return pipes. The rate of the water that flows through the heat exchanger must not drop below the value corresponding to a temperature differential of 8 C. During long periods of inactivity, it is advisable to drain the water from the system. It is possible to avoid draining the water by adding ethylene glycol to the water circuit (see Use of antifreeze solutions ). Standard set-up The units are installed in systems where the pumping unit and the thermal inertia are provided by the user. The pump must be installed with the supply pressing against the machine's water intake. 2 3 Compact-I 2 Inertial storage tank (if necessary) 3 Hydraulic pump Pump and Tank & Pump installation The units are equipped with a pump or with a pump and a buffer tank. The unit's hydraulic circuit is complete with an expansion tank and safety valve, air bleed and drain valves. Compact-I 2

22 Water connections Pump and Tank & Pump with INVERTER set up The units are equipped with an electric pump featuring constant speed control for variable flow rate systems. The units is complete with a sensor to measure the pressure difference between the system's flow and return pressure. During the installation phase, the unit must be set by following the simple procedure. With the system completely open so that the water flow rate reaches each area, read the differential pressure value on the control panel. The value is the set-point that is to be assigned to the differential pressure to control. In the case of system partialisation with the terminals or areas closed, the pressure differential value is kept constant by decreasing the flow rate. The unit's hydraulic circuit is complete with an expansion tank and safety valve, air bleed and drain valves. For proper operation of the unit with this type of system set-up, you must comply with the basic rule, meaning that there must always be a circuit branch that enables circulation of water. This can be obtained with a type of board like the one indicated in the figure, meaning with one of the terminals equipped with a 3-way valve whilst all the remaining ones can be equipped with a 2-way shut-off valve. Alternatively, there can be a bypass located in a certain point of the hydraulic circuit. It is recommended to place the bypass or 3-way valve as far away as possible from the unit. The bypass has the function to enable circulation of the minimum flow rate, especially during starting and switch-off transients of the unit without interrupting flow to the evaporator. The minimum flow rate value is contained in the "Hydraulic data" section. With the electric pump featuring constant speed control it is also possible to effectively manage the start-up while the system is cold, by modulating the speed, allowing you to reach the operating temperatures more quickly. Example with a 3-way valve on the last terminal Example with a Bypass on the circuit BY-PASS The sizing of the By-PASS is up to the installer; it is in any case recommended to include a calibration valve to balance the system. Pump set up with the V3V accessory (only for THAITY heat pumps) The units in heat pumps, with Pump P-P2-PI-PI2 set up (single electropump), can be supplied with a factory-fitted 3-way diverter valve. This way it is possible to manage the production of domestic hot water without the addition of external valves Compact-I 2 Inertial storage tank (if necessary) 3 Domestic 4 Technical water storage tank

23 Water connections Minimum hydraulic circuit contents For proper unit operation, a minimum amount of water must be ensured in the hydraulic system. The minimum water content is established on the basis of the unit's nominal cooling capacity (table A Technical Date), multiplied by the coefficient expressed in l/kw. If the minimum content in the system is below the minimum value indicated or calculated, it is advisable to select the TANK&PUMP accessory complete with inertial storage tank, and install an additional tank if necessary. However, it is always recommended to use a storage tank with greater system water content in process applications to guarantee high system thermal inertia. Range Adjustment type Specific capacity TCAITY THAITY AdaptiveFunction Plus 2 l/kw Example : THAITY 236 nominal heating capacity QT :39,5 kw Minimum system capacity QT (kw) x 2 l/kw = 39,5 kw x 2 l/kw = 79 l Production of domestic how water DHW The machine control is able to manage a 3-way diverter valve (V3V accessory or KVDEV accessory) to produce domestic hot water. The diverter valve must be installed on the flow line in order to deviate the water flow from the system to the DHW side. Priority between DHW and system can be set directly from the control panel For the production of DHW by using the heat pump, use a technical water storage, which cannot be used directly for human consumption, and combine it to a DHW producer. The figure shows an example: KACTS technical water storage tank KACTS KMACSI instantaneous domestic hot water producer KMACSI from heat pump 2 from the mains drain 4 recirculation pump 5 DHW utility 6 from the mains 6 7 safety valve 3 How to manage the DHW request: by means of the digital input: the request is assigned by a thermostat assembled by the installer. When the thermostat closes, the unit understands that there is a DHW request and, once the conditions have been verified, the procedure is activated to meet the DHW requirements; by means of temperature probe in the storage tank: a temperature probe is placed inside the storage tank, which is directly connected to the unit board. The required set point can be configured from the panel together with the relative activation differential. In this case, the probe must be accurately positioned and the maximum distance allowed respected due to the type of probes used. Type of probe description type of probe features β (25/85) NTC50 NTC OT50 50kΩ@25 C 3977 (±%) NTC NTC 0kΩ@25 C 3435 (±%) 23

24 Water connections Management of an integrative source and auxiliary generator The integrative heat source (electric heater) or an auxiliary thermal source (boiler) can be managed from the unit board. Integrative thermal source (KT accessory) An integrative thermal source is an electric resistance that runs together with the THAITY heat pump in winter mode. By means of the unit's control, it is possible to control start-up and switch-off according to different variables: outdoor air temperature, delay in reaching the set-point due to high thermal load. Resistance is always activated during the defrost cycle and when DHW production is requested. When there is a 3-way valve for KVDEV DHW production, the electrical resistance must be placed upstream of the valve, as illustrated in the figure. It is always recommended to accurately check the electrical power available when integrative electrical resistances are installed Accessory KVDEV 2 24 From heat pump Compact-I 2 Inertial storage tank 3 Hydraulic circuit breaker 4 Electric heater 5 3-way valve (optional) 6 Domestic 7 Technical water storage tank

25 Water connections For units assembled with Pump set up, the KVDEV kit can be installed for managing the domestic hot water production. The 3-way valve allows deviating the water flow from the system to the technical water tank for the production of domestic hot water. The kit includes two flexible pipes to connect the delivery and return of the unit. The flexible pipes compensate the misalignment between the system delivery and return fittings of the unit and the corresponding KVDEV fittings even if the unit is equipped with KSA anti-vibration supports. The accessory must be mounted the closest possible to the heat pumps, in order to prevent a transfer of cold water inside the domestic hot water storage, during the passage between heat pump chiller operation to produce domestic hot water. The delivery and return fittings towards the system are available with 2" connections. The kit is equipped with RAL908 painted bonnet. Cable gland for wiring the power supply. IP 54 rate Valve body technical characteristics and servomotor technical data The diverter valve with nickel-plated bass body, chrome-plated brass ball, PTFE ball seat seal and HNBR manoeuvre rod seal, synthetic fibre (Fasit) bar hold gaskets. Maximum differential pressure is: 6 bar Working pressure: PN 40 Flow temperature limits: C Ball manoeuvre time with 80 angle: 20 s. The passage of fluid is always guaranteed during the manoeuvre. The actuator is contained in a sealed box fixed to the valve body via a split pin. Nominal power supply voltage 230 V/50Hz Absorbed power 4 VA Isolation class: II Maximum torque: 28 Nm (230V) Auxiliary contact: 6 A 230V (on-off) 000 Perdita di carico (mbar) 0 0, Portata (l/h) Electrical connection L 0.08 N F TA N 2 Electrical panel terminal board 2 KVDEV valve Connection of KVDEV valve to unit terminal board 25

26 Water connections Auxiliary thermal source An auxiliary generator is a heat generator that runs alternatively to the heat pump; typically, it is a boiler. When the alternative generator is activated, the heat pump and all its auxiliaries are off, even if powered. The auxiliary generator can be enabled only for heating the systems. Operation of the auxiliary source The auxiliary generator can be activated according to three modes: manually; for an outdoor temperature set point; for a convenience criterion based on the costs of electricity and fuel (methane and butane) for heat Pump malfunction Compact-I 2 Inertial storage tank 3 Hydraulic circuit breaker 4 Boiler 5 Shut-off components not managed Hydraulic data Model Safety valve calibration of channelled water. barg Heat exchanger water content l 3,2 3,2 3,8 5, Expansion tank capacity l Expansion tank pre-load barg Expansion tank maximum pressure barg Tank water content ASP/ASP2 ASPI/ASPI2 l Minimum flow rate (water differential pressure switch intervention) l/h The expansion tank on the machine has limited capacity to protect the hydraulic circuit inside the machine. It is the installer's duty to size and install an expansion tank that is suitable for the system. 26

27 Water connections Applications for partial (DS) and total (RC00) recovery and DHW production Overview Condensation heat in a chiller is usually disposed of in the air; it can be recovered intelligently by means of heat recovery, which may be partial (DS) or total (RC00). With summer operation, a reduced value equivalent to the desuperheating of gas is recovered in the first phase, while the second phase recovers all the condensation heat that would otherwise be lost. In the case of a reversible heat pump, partial recovery (DS) and total recovery (RC00) can also run in winter mode. In the former case, the partial recovery (DS) deducts a rate from the heat production in the main heat exchanger, whereas, in the latter case of total recovery, the heat production is an alternative to that of the main heat exchanger. Below is indicative information. The provided diagrams are not complete and are used only to provide guidelines that allow a better use of the unit. 2 Chiller or Heat pump 2 System user side storage tank 3 Pump 6 System recovery side storage tank Chiller or heat pump set-up with DS or RC00 Chiller With this type of system, the main hydraulic circuit of the chiller is connected to the user and produces cold water for air conditioning. The unit can be set-up as a pump or pump and storage tank as alternative to the traditional solution seen installed in the system. The desuperheater (DS), with which the machine can be supplied, will be connected by means of a technical water storage tank and external pump for DHW or to the system to produce hot water for the post-heating coils of the CTA or other applications. RC00 total recovery, as an alternative to DS, can be used in the same applications, however, the amount of heat produced is significantly higher and, at the same time, the heat level of the water produced is lower. Heat pump with partial recovery (DS) - 2-Pipe+DHW system Should the unit be a reversible heat pump, summer operation is the same as the aforementioned situation of the chiller. Instead, with winter operation, the user has DHW produced from the heat pump. If the unit is equipped with a DS desuperheater, this can be also active in winter mode. However, in this case, this value is deducted from the portion of heat from the hot water produced from the main heat exchanger. Heat pump with total recovery (RC00) - 2-Pipe+DHW system If the unit is a reversible heat pump fitted with total recovery (RC00), the behaviour is identical to a Polyvalent 2-pipe unit with specific application in 2-pipe+DHW systems. Air conditioning and the DHW production in a 2-pipe system is a typical application in hotels, hospitals, gyms and hospitality structures in general. 27

28 Water connections The 2-pipe+DHW systems provide summer mode with the production of chilled water and/or simultaneous or separate production of hot water from the heat recovery unit. In winter, however, the demand is for hot water production from the main heat exchanger and alternatively (assigning appropriate priority) from the recovery exchanger. The unit can run in two modes: AUTOMATIC: the system allows total recovery of the condensation heat and/or the production of chilled water (summer season) SELECT: this allows the production of hot water to the recovery heat exchanger or from the main one (winter season) Summer season AUTOMATIC Winter season SELECT Domestic Hot water Air Conditioning Cold water Domestic or Air Conditioning Hot water Competitive advantages The heat pump unit with total recovery, defined as 2-pipe Polyvalent, fulfils the simultaneous or separate request for hot and cold water with one single unit, thereby optimising energy consumption and simplifying management in the 2-pipe+DHW systems. Its natural application and as a valid alternative in all conventional systems that require a chiller or heat pump with the use or integration of a boiler. The advantages are due to a single unit being used, the economic saving due to the high COP (operating with heat recovery in summer mode), the non-use of combustible products that are harmful to the ozone so as to be defined as an ecological polyvalent unit. Fourth generation polyvalent versatile heat pump, which unlike other polyvalent units meets the typical demand in 2-pipe systems with a single unit and in a completely flexible way. It is therefore offered on the market as the unit that guarantees fundamental aspects such as EFFICIENCY, RELIABILITY AND VERSATILITY. Technical data DS - RC00 Model TCAITY Nominal heating capacity RC00 () kw 40, ,8 Nominal flow rate/pressure drop RC00 () m 3 /h / kpa,3 / 2,7 / 2,8 / 6 2, / 6 Nominal heating capacity DS () kw 4,6 9,4 20,6 24,2 Nominal flow rate/pressure drop DS () m 3 /h / kpa 6,9 / 45 9,3 / 46 0,8 / 49 2 / 46 Model THAITY Nominal heating capacity RC00 () kw 40, ,8 Nominal flow rate/pressure drop RC00 () m 3 /h / kpa,3 / 2,7 / 2,8 / 6 2, / 6 Nominal heating capacity DS () kw 4,6 9,4 20,6 24,2 Nominal flow rate/pressure drop DS () m 3 /h / kpa 6,9 / 45 9,3 / 46 0,8 / 49 2 / 46 () Recovery unit heating capacity Conditions referring to the unit operating with chilled water temperature 7 C, differential temperature due to evaporation of 5 K, hot water temperature produced equivalent to 40/45 C (RC00) 50/60 C (DS). NB. With heat pumps operating in winter mode with DC active, the heating capacity available is decreased from the portion supplied to the desuperheater.. Activation and deactivation of DS and RC00 The units set up with DS desuperheater or total recovery RC00 can activate the thermal recovery by means of an external digital input (e.g. the KTRD accessory). Moreover, the criterion to stop the thermal recovery can be established from the panel: for digital contact: if the consensus is interrupted, the thermal recovery stops as well. This mode meets the requirement to carry out a temperature control system of the storage tank connected to the recovery; for maximum return temperature: the said limit is set from the panel on the machine or from the remote keyboard (KTR accessory). The recovery keeps operating until the return temperature is lower than the configured set point. This mode is suitable for maximising the use of the thermal recovery. DS/RC00 water connetcions place 28

29 Water connections 2. Set-up of a 3-way heat pump (KVDEV) and domestic hot water production (DHW) and possibly a desuperheater (DS) at the same time Heat pump System user side storage tank Pump 3-way diverter valve outside the unit (KVDEV) User-DHW System recovery side storage tank With this type of system, the main circuit of the heat pump produces DHW (winter season) or DCW (summer season) for the user. The unit can be set-up as a pump or pump and storage tank as alternative to the traditional solution seen installed in the system. For the production of DHW by using the heat pump, use a technical water storage tank, which cannot be used directly for human consumption, and combine it to a DHW producer/intermediate heat exchanger. Should a 3-way valve system (KVDEV) be envisaged, it can manage production of hot water to the DHW circuit in both the summer and winter seasons. In fact, the valve enables water flow deviation from the system to the technical water storage tank for the system to produce DHW for domestic use. The desuperheater, with which the machine can be fitted, must be connected to the same technical water storage tank for the DHW production system, and is able to keep the heat storage tank level high. This way, the system allows maximum service continuity to the DHW and system, regardless of the operation mode (summer or winter). 2. Priority management and domestic hot water DHW request (3-way switch-over valve KVDEV and activation of any DS) How to manage the DHW request: by means of the discrete input: the request is assigned by a thermostat (e.g. via a KTRD accessory). When the thermostat closes, the unit understands that there is a DHW request and, once the conditions have been verified, the procedure is activated to meet the DHW requirements; by means of a temperature probe in the storage tank: a temperature probe is placed inside the storage tank, which is directly connected to the unit's board. The required set point can be configured from the panel together with the relative activation differential. In this case, the probe must be accurately positioned and the maximum distance allowed respected due to the type of probes used. Type of probe: description type of probe features β (25/85) NTC50 NTC NTC HT50 50kΩ@25 C 3977 (±%) NTC 0kΩ@25 C 3435 (±%) 29

30 Water connections SYSTEM SUGGESTION OF THE UNIT WITH ACCESSORY RC00/DS AND DHW PRODUCTION MANAGEMENT Closed circuit system (for heating, for example) M VE VS VSAM FC RC00/DS ST8 PU VM C VSTR KTRD AP Open circuit system (for hot water, for example) VSAM M VE VS PU R OUT RC00/DS ST8 AP KTRD AAT SI PUR R VE VS FA VR IN IS VM C PU VSTR C AU Open circuit system and simultaneous presence of 3-way diverter valve KVDEV (for example for domestic hot water) VSAM PU R OUT ST/KTRD AAT SI PUR R VE VS FA VR IN IS C AU AP M VE VS ST2 VDEV PdC ST I IS DHW indication (tap, shower, sink) C PU AU Other utilities I System 30

31 Water connections Open circuit system and simultaneous presence of 3-way diverter valve KVDEV and DS desuperheater (for example for domestic hot water) VSAM M VE VS PU R OUT DS ST8 PU VM ST/KTRD AAT SI PUR R VE VS FA VR IN IS C VSTR C AU AP M VE VS ST VDEV PdC I IS DHW indication (tap, shower, sink) ST AU Other utilities C PU I System PdC Reversible heat pump unit PUR Recirculation loop circulation pump RC00 Recovery unit FC Fan coil/utility DS Desuperheater UT For use M Manometer From the water mains VS safety valve ST Temperature probe VE Expansion vessel YES Intermediate heat exchanger VSTR Recovery heat drain valve ST8 RC00/DS inlet temperature probe VMS Manual air bleed valve AAT Technical water storage tank VSAM Automatic/manual air bleed valve C Water drain/charge cock AP Unit board ST Temperature probe VR Check Valve KTRD Thermostat with display (accessory) VM 3-way mixing valve FA Water filter PU Circulation pump ST Main heat exchanger inlet temperature probe KVDEV 3-way diverter valve ST2 Main heat exchanger outlet temperature probe R Cock NOTA BENE: for the unit to operate properly, activation of the DC/RC00 recovery pump must be controlled by means of a specific discrete output provided in the board on the unit. The minimum temperature of the water input to the recovery unit RC00 is equal to 20 C. The minimum temperature of the water input to the recovery unit DS is equal to 40 C. 3

32 Water connections Use of antifreeze solutions The use of ethylene glycol is recommended if you do not wish to drain the water from the hydraulic system during the winter stoppage, or if the unit has to supply chilled water at temperatures lower than 5 C The addition of glycol changes the physical properties of the water and consequently the performance of the unit. The proper percentage of glycol to be added to the system can be obtained from the most demanding functioning conditions from those shown below. Table H shows the multipliers which allow the changes in performance of the units to be determined in proportion to the required percentage of ethylene glycol. The multipliers refer to the following conditions: condenser inlet air temperature 35 C; chilled water temperature 7 C; temperature differential at evaporator 5 C. For different functioning conditions, the same coefficients can be used as their variations are negligible. Table "H" Design air temperature in C % glycol in weight Freezing temperature C fc G fc Δpw fc QF fc P fc G fc Δpw fc QF fc P Correction factor of the glycol water flow to the evaporator Correction factor of the pressure drops in the evaporator Cooling capacity correction factor Correction factor for the total absorbed electrical current 32

33 Water connections Water circuits TCAITY-THAITY models Hydraulic circuit TCAITY-THAITY models standard set-up AP ECH ST2 OUT CF RE PD M FA IN ST Hydraulic circuit TCAITY-THAITY models P/P2 set-up RAS ST M IN CF PD VS VE PU P2 P SPD FA OUT ECH ST2 RAE (optional) Hydraulic circuit TCAITY-THAITY models ASP Tank&Pump set-up RAS ST MA FA IN CF PD RAA P2 ECH ST2 SA VS PU SPD P OUT VE Hydraulic circuit TCAITY-THAITY models DP set-up AP ECH ST2 VS VE PU VR KT OUT CF RE PD M PU VR P SPD P2 FA IN ST 33

34 Water connections Hydraulic circuit TCAEY-THAEY models ASDP set-up AP ECH ST2 RAA VE PU VR KT OUT CF RE PD ST M VS SA PU VR P SPD FA S IN P2 Hydraulic circuit TCAITY-THAITY models P/P2 V3V set-up FA IN RAS ST M PU FA IN CF ECH ST2 PD VS VE P2 P SPD V3V OUT OUT Hydraulic recovery circuit for REC/DS set ups CF ST8 REC/DS CF ECH RE PD VS AP ST ST2 ST4 Refrigerant circuit Plate evaporator Evaporator anti-freeze resistance Water differential pressure switch Manual bleed valve Safety valve Electronic controls Primary inlet temperature probe Primary outlet temperature probe - work and antifreeze for Standard and Pump set-ups - antifreeze for Tank & Pump set-ups Storage tank outlet temperature probe (work) SPD Differential pressure sensor only for PI/PI2 - DPI/DPI2 - ASPI/ASPI2 - ASDPI/ASDPI2 set ups VE RAA FA SA KT M PU S VR Expansion vessel Storage tank resistance (accessory) Mesh filter (set up by the installer) Storage tank Integrative electrical resistance (accessory) Manometer Pump Water drain Shut-off tap Check Valve Connections by installer 34

35 - GND J6 GND! ALARM Prg ON OFF MODE Electrical connections Electrical connections MIQE MEU L Line L2 Line 2 L3 Line 3 N PE IG KRS485 KUSB KFTT0 KBE KBM J6 KTR PC SCR SEI LBG KT KEAP CS CACS DSP VACS CGA STACS FDL LFC Electrical panel internal terminal board User external terminal board Neutral Earth terminal Manoeuvre isolator switch RS485 serial interface (accessory) RS485/USB converter (accessory) LONWORKS serial interface (accessory) Bacnet Ethernet interface (accessory) Bacnet MS/TP Ethernet interface (accessory) Connector to insert the KRS485, KFTT0, KBM, KBE accessories Remote keyboard (accessory) Personal computer Remote control selector (control with clean contact) Summer/winter selector (control with potential free contact) General lock light (consensus in voltage 230 Vac, maximum load 0,5A AC) KT control (additional electric resistance for heat pump) (230 Vac, maximum load 0.5 A AC) Outdoor air probe for Set-point compensation (as an alternative to that already fitted on the machine) 4-20 ma analogue signal for shifting Set-point (incompatible with the DSP accessory). This must also be handled as a special feature by our Pre-Sales Department VACS consent (control with potential-free contact) Double set-point via digital consensus (incompatible with the CS/CACS accessory) 3-way diverter valve for managing the production of domestic hot water (KVDEV) (230 Vac, maximum load 0,5A AC) Auxiliary generator control (consensus in voltage 230 Vac, maximum load 0,5A AC) Domestic hot water temperature probe (not supplied, set up by the installer); an alternative to domestic hot water consensus (CACS) Forced download compressors (FDL accessory)(control with clean contact) Compressor functioning light (consensus in voltage 230 Vac, maximum load 0,5A AC) MPR Motor recovery unit pump control (consensus in voltage 230 Vac, maximum load 0,5A AC) Connection by installer 6-wire telephone cable (maximum distance 50 m, for greater distances use the KR200 accessory and the shielded cable) The electrical panel is accessible from the front panel of the unit. Connections must be made in compliance with current standards and with the diagrams provided with the machine. Machine earthing is legally compulsory. Always install a main automatic switch or fuses with adequate capacity and blackout power in a protected area or near the machine. ATTENTION! The following diagrams only show the connections to be made by the installer. For electrical connections to the unit and the accessories, follow the wiring diagrams which are supplied with them. Models Line Section PE section Commands and controls section 236 mm² 6 6, mm² 6 6,5 260 mm² 25 25,5 IG PE + KRS KBE J6 KBM J6 KFTT J6 MIQE L L L N - +N- MEU - + KTR KUSB SCR SEI LBG CACS STACS ACS PC KT CGA CS DSP FDL LFC KEAP MPR 35

36 RHOSS S.P.A. Via Oltre Ferrovia, Codroipo (UD) - Italy tel fax rhoss@rhoss.it IR GROUP SARL 9, chemin de la Plaine Vourles - France tél. +33 (0) fax +33 (0) exportsales@rhoss.it RHOSS Deutschland GmbH Hölzlestraße 23, D Balingen, OT Engstlatt - Germany tel. +49 (0) fax +49 (0) info@rhoss.de - RHOSS GULF JLT Suite No: 3004, Platinum Tower Jumeirah Lakes Towers, Dubai - UAE ph fax info@rhossgulf.com Uffici commerciali Italia: Codroipo (UD) Via Oltre Ferrovia, 32 tel fax Nova Milanese (MB) Via Venezia, 2 - p. 2 tel fax RhossOfficial RhossOfficial RhossOfficial RhossOfficialChannel Rhoss RHOSSS S.P.A. declines all responsabilities for possible mistakes in the catalogue and reserves the right to alter the features of their products without notice in the interests of continuous improvement. K2036EN ed