TWH 252-T÷2122-T VV/Y/A

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TWH 252-T÷2122-T VV/Y/A

TWH 252-T÷2122-T VV/Y/A

High efficiency water cooled liquid Chillers with (Inverter) Screw compressors and shell and tube exchangers

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The high efficiency liquid Chillers of the TWH 252-T÷2122-T VV/Y/A series, with R134a refrigerant, are designed to satisfy the needs of the service sector or industrial systems requiring high power.
Equipped with latest generation Screw compressors, shell and tube exchangers and connections for condensation with cooling tower water or well water or with a dry-cooler, these units have a series of accessories which are factory fitted or supplied separately. Designed and produced to optimize the layout of each component so as to make any necessary maintenance operations more convenient, these units have an essential and compact structure intended for indoor installation. Furthermore, accessories as the Inverter control on one Screw compressor or both is also available for getting the highest efficiency at part load and a significant reduction of starting current.

The units are compliant to the 2021 ErP Regulation.
On request, units can be supplied with R513A refrigerant.

Versions

  • TWH - Cooling only
  • TWH/SSL - Super silenced cooling only

Power range

  • 250-2143 kW
  • 71.0-609 Ton

Features

  • Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
  • Screw compressors with built-in oil separator, suction filter, crankcase heater, oil sight glass, thermal protection and stepless capacity steps.
  • Shell and tube type condenser, with easily removable cast iron heads to enable access for maintenance operations. Each cooling circuit is supplied with an independent condenser. Water connections for cooling tower and dry-cooler operation; on request for well water.
  • Shell and tube evaporator with two independent circuits on the refrigerant side and one on the water side, complete with water differential pressure switch.
  • Cooling circuit shut-off valves on discharge and liquid line.
  • Electronic expansion valve.
  • Electronic high and low pressure gauges.
  • R134a refrigerant. On request R513A refrigerant.
  • Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors.
  • Microprocessor control and regulation system.

Factory fitted accessories

  • IM Automatic circuit breakers
  • RE Adjustable minimum/maximum voltage and phase control relay
  • PV3 3-Way electronic pressostatic valve
  • DSV Double relief safety valve with changeover switch on the high pressure side for each refrigerant circuit
  • DSVHL Double relief safety valve with changeover switch on the high and on the low pressure side of each refrigerant circuit
  • BT Low water temperature kit
  • HR Desuperheater
  • HRT/P Total heat recovery in parallel
  • FE Antifreeze heater for evaporator
  • II Inverter on one compressor and soft start for other compressors
  • ID Inverter on all compressors
  • SS Soft start
  • DP Device for Heat Pump operation
  • HTW Device for high temperature hot water production.
  • WM Web Monitoring - Wireless remote monitoring (GPRS/EDGE/4G/TCP-IP)
  • IS Modbus RTU protocol, RS485 serial interface
  • IST Modbus TCP/IP protocol, Ethernet port
  • ISB BACnet MSTP protocol, RS485 serial interface
  • ISBT BACnet IP protocol, Ethernet port
  • ISS SNMP protocol, Ethernet port
  • IAV Remote set-point, 0-10V signal
  • IAA Remote set-point, 4-20mA signal
  • IAS Remote signal for second set-point activation
  • IDL Demand limit from digital input
  • CP Potential free contacts
  • IVV 0-10V signal for the management of the electronic pressostatic valve source side
  • MN High and low pressure gauges

Loose accessories

  • CR Remote control panel
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
  • FL Flow switch
252-T302-T362-T422-T502-T582-T672-T782-T902-T1042-T1182-T1342-T1492-T1662-T1872-T2122-T
CoolingCooling capacity (1)kW2503073594274995726757839011040118313421497166219022143
Absorbed power (1)kW46,258,165,478,185,0101121137157182205235255293355374
EER (1)5,415,285,495,475,875,665,585,725,745,715,775,715,875,675,365,73
Cooling (EN14511)Cooling capacity (1)kW2503073594274995716747829011039118213411496166119012142
Absorbed power (1)kW47,660,067,780,788,4104125142163188212243265301366387
EER (1)5,255,125,305,295,645,495,395,515,535,535,585,525,655,525,195,53
SEER (2)6,356,556,716,686,876,876,986,876,997,077,237,217,297,227,127,12
Energy Efficiency (2)%246254260259267267271267272275281280284281277277
CompressorQuantityn°2222222222222222
Refrigerant circuitsn°2222222222222222
Capacity stepsn°SteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessStepless
EvaporatorWater flowl/s11,9414,6717,1520,4023,8427,3332,2537,4143,0549,6956,5264,1271,5279,4190,87102
Pressure dropskPa43374039343838524344425259405049
Water connectionsDN125150150150200200200200200250250250250250250300
CondenserWater flowl/s14,1517,4420,2824,1327,9032,1538,0343,9650,5558,3866,3275,3583,7193,41108120
Pressure dropskPa19273235373734403941374035324241
Water connectionsDN808080808080100100100100125125125125125125
Electrical characteristicsPower supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA18418221024027830639244452859067277073080412961464
Max. starting currentA20021824528234738347155956465378489391299215831667
Sound pressureSTD version (3)dB(A)75757575767676767777777879798182
SSL version (3)dB(A)71717171727272727373737475757778
WeightsTransport weightkg19832254242326252943303937154079486252596070631578438263971310308
Operating weightkg214024602620286032603350411046105520604068207110879092501070011470

Dimensions

252-T302-T362-T422-T502-T582-T672-T782-T902-T1042-T1182-T1342-T1492-T1662-T1872-T2122-T
LSTD/SSLmm3700370037003800390039003900490049004900530053005550555055505550
WSTDmm1000110011001150120012001200120013001300140014002000200020002000
SSLmm1200125012501350135013501400140014501450155015502150215021502150
HSTDmm1800195020502100215022002300230024002450260026002650270027002700
SSLmm1800195020502100215022002300230024002450260026002650270027002700

Notes

  • 1 Chilled water from 12 to 7 °C, water temperature at the condenser from 30 to 35 °C.
  • 2 Seasonal energy efficiency of cooling at low temperature. According to EU Regulation n. 2016/2281.
  • 3 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • N.B. (1) Weights of SSL version are specified on technical brochure.