JWH 051÷172 S/K

Watercooled liquid Chillers and Heat Pumps with Scroll compressors and shell and tube exchangers

_ktk_icon_versions_cooling_only.png _ktk_icon_versions_cooling_heating.png _ktk_icon_compressor_scroll.png _ktk_icon_shell_and_tube.png _ktk_icon_refrigerant_R410A.png ktk_icon_refrigerant_R452B.png ktk_icon_refrigerant_R454B.png

The JWH 051÷172 S/K liquid Chillers and Heat Pumps, with R410A refrigerant, are designed for medium-sized domestic or industrial systems which require medium power, space-saving units and quiet operation. This range is ideal for indoor installation and, equipped with a self-contained structure, it reduces the overall dimensions to a minimum while at the same time making installation and maintenance operations easier. These units are used to remove the heat developed during industrial processes or, combined with Fan Coil units, for the air conditioning of the rooms. They can be supplied with Modbus RTU protocol through RS485 serial interface. Equipped with Scroll compressors and shell and tube exchangers, these units have cooling and hydraulic circuits complete with everything necessary for quick installation and high energy efficiency, even in the version with tank and pump; a series of accessories, factory fitted or supplied separately, like desuperheater and total heat recovery, rounds off the variety of equipment in this product range.
The units are compliant to the ErP Regulation.
On request, units can be supplied with R452B or R454B refrigerant.


  • JWH - Cooling only
  • JWH/WP - Reversible Heat Pump
  • JWH/SSL - Super silenced cooling only
  • JWH/WP/SSL - Super silenced reversible Heat Pump

Power range

  • 57.0-196 kW
  • 16.0-56.0 Ton


  • Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
  • Scroll compressors with oil sight glass, internal overheat protection and crankcase heater.
  • Shell and tube type condenser with one circuit on the refrigerant side and one on the water side in 051÷131 models; with two independent circuits on the refrigerant side and one on the water side in 152÷172 models.
  • Shell and tube type evaporator with one circuit on the refrigerant side and one on the water side in 051÷131 models; with two independent circuits on the refrigerant side and one on the water side in 152÷172 models, complete with water differential pressure switch.
  • R410A refrigerant. On request R452B or R454B refrigerant.
  • Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors, interface relay and terminals for external connections.
  • Microprocessor control and regulation system.

Factory fitted accessories

  • IM Automatic circuit breakers
  • SL Unit silencement
  • RFM Cooling circuit shut-off valve on discharge line
  • RFL Cooling circuit shut-off valve on liquid line
  • BT Low water temperature kit
  • HR Desuperheater
  • HRT Total heat recovery
  • SP Inertial tank
  • SPU Inertial tank and single circulating pump
  • SPD Inertial tank and double circulating pump
  • FE Antifreeze heater for evaporator
  • FB Antifreeze heater for evaporator/tank
  • FU Antifreeze heater for evaporator/tank, single pump and pipes
  • FD Antifreeze heater for evaporator/tank, double pump and pipes
  • SS Soft start
  • IS Modbus RTU protocol, RS485 serial interface

Loose accessories

  • MN High and low pressure gauges
  • CR Remote control panel
  • PV2 2-Way electronic pressostatic valve
  • PV3 3-Way electronic pressostatic valve
  • AG Rubber shock absorbers
  • AG2 Rubber vibration dampers unit with SP, SPU or SPD accessory
  • AM Spring shock absorbers
  • AM2 Spring-loaded antivibration unit with SP, SPU or SPD accessory
  • FL Flow switch
CoolingCooling capacity (1)kW57,062,670,982,998,3111129151172196
Absorbed power (1)kW13,214,316,418,922,025,728,233,138,244,1
EER (1)4,324,384,324,394,474,324,574,564,504,44
Cooling (EN14511)Cooling capacity (1)kW56,762,270,482,297,6110128150171195
Absorbed power (1)kW13,714,917,219,923,126,929,434,539,745,7
EER (1)4,144,174,104,144,234,104,364,364,314,27
SEER (2)5,215,225,215,225,715,225,746,215,836,19
Energy Efficiency (2)%200201200201220201222240225240
HeatingHeating capacity (3)kW74,680,391,7106122139158182208238
Absorbed power (3)kW18,620,022,926,029,133,238,043,152,357,3
Heating (EN14511)Heating capacity (3)kW75,180,992,5106123140159183210239
Absorbed power (3)kW19,320,924,027,130,634,839,644,854,459,4
COP (3)3,893,883,863,924,034,034,024,083,854,03
SCOP (4)4,164,394,394,534,624,574,854,644,724,84
Energy Efficiency (4)%158168168173177175186178181186
Refrigerant circuits1111111122
Capacity steps2222233344
EvaporatorWater flowl/s2,722,993,393,964,705,306,167,218,229,36
Pressure dropskPa32425574625557496349
Water connections"G1 ½"1 ½"2"2"2"2 ½"2 ½"3"3"3"
CondenserWater flowl/s3,353,674,174,865,756,537,518,8010,0411,47
Pressure dropskPa15171820273323302027
Water connections"G2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"
Electrical characteristicsPower supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA333943496064739098120
Max. starting currentA128137139164204161189234213264
Unit with tank and pumpPump available static pressurekPa150145130140110165165140135105
Tank water volumel470470470470470470470470660660
Water connections"G2"2"2"2"2"2 ½"2 ½"2 ½"2 ½"2 ½"
Sound pressureSTD version (5)dB(A)59596160626263656565
With SL accessory (5)dB(A)56565857585960626262
SSL version (5)dB(A)54545656575759606060
WeightsTransport weight (6)kg465470478488504590606657840856
Operating weight (6)kg495500510520540630650710900920




  • 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 Heated water from 40 to 45 °C, water temperature at the evaporator from 15 to 10 °C.
  • 4 Seasonal energy efficiency of heating at low temperature with average climatic conditions. According to EU Regulation n. 813/2013.
  • 5 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • 6 Unit without tank and pump.
  • N.B. (1) Weights of SSL and WP versions are specified on technical brochure.