TWH 202÷1352 VV/H/A

A CLASS energy efficiency watercooled liquid Chillers with (Inverter) Screw compressors and shell and tube exchangers

_ktk_icon_versions_cooling_only.png _ktk_icon_compressor_Screw_inverter.png _ktk_icon_compressor_screw.png _ktk_icon_shell_and_tube.png _ktk_icon_gsm.png _icon_A_CLASS_2018_KTK_cooling.png _ktk_icon_HFO_2016.png

The liquid Chillers of the TWH 202÷1352 VV/H/A series, with A CLASS energy efficiency and HFO-R1234ze refrigerant, are designed to satisfy the needs of the service sector or industrial systems requiring high power.
The latest generation refrigerant HFO-R1234ze, with GWP<1 (Global Warming Potential), is the most environmentally sustainable refrigerant on the market, and meets the strictest international environmental regulations.
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 models 1002÷1402 are compliant to the ErP 2021 Regulation. The models 1602÷6002 are compliant to the ErP 2021 Regulation for process cooling application; for comfort cooling application they are compliant if provided with ID accessory (Inverter on all compressors).


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

Power range

  • 234-1650 kW
  • 67.0-469 Ton


  • 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.
  • HFO-R1234ze 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
  • BT Low water temperature kit
  • HR Desuperheater
  • HRT Total heat recovery
  • 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
  • WM Web Monitoring - Wireless remote monitoring (GPRS/EDGE/3G/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
  • ISL LonWorks protocol, FTT-10 serial interface
  • ISS SNMP protocol, Ethernet port
  • IAV Remote set-point, 0-10 V signal
  • IAA Remote set-point, 4-20 mA signal
  • IAS Remote signal for second set-point activation
  • IDL Demand limit from digital input
  • CP Potential free contacts

Loose accessories

  • MN High and low pressure gauges
  • CR Remote control panel
  • PV3 3-Way electronic pressostatic valve
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
  • FL Flow switch
CoolingCooling capacity (1)kW2343103754374885586557368689801160127814751650
Absorbed power (1)kW4457668089100117131154174222242275304
EER (1)5,325,445,685,465,485,585,605,625,645,635,235,285,365,43
Cooling (EN14511)Cooling capacity (1)kW2333093734364875576537348669771157127414691644
Absorbed power (1)kW4559688392103121135159180229250285314
EER (1)5,185,235,465,275,325,395,425,425,455,445,065,105,165,23
SEER (2)5,685,845,935,885,905,915,956,026,116,076,146,216,336,33
Energy Efficiency (2)%253260264262264264266269273271274278283283
Refrigerant circuits22222222222222
Capacity stepsSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessStepless
EvaporatorWater flowl/s11,1814,8117,9220,8823,3226,6631,2935,1641,4746,8255,4261,0670,4778,83
Pressure dropskPa3637423932313545393839495754
Water connectionsDN125150150150200200200200200250250250250250
CondenserWater flowl/s13,2817,5321,0724,7027,5731,4436,8841,4248,8355,1466,0372,6283,6193,36
Pressure dropskPa1728343636353234373737373532
Water connectionsDN808080808080100100100100125125125150
Electrical characteristicsPower supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA144190220260290334384436489549701761873961
Max. starting currentA1992573183734205044925766927821144117413721416
Sound pressureSTD version (3)dB(A)7676767676767677787980808182
SSL version (3)dB(A)7272727272727273747576767778
WeightsTransport weightkg214024452640286030903230418045605205567069507080906010050
Operating weightkg2300266028403100342035504590511058806470722078801003011230




  • 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.