JWH 051÷172 S/K/P

Watercooled liquid Chillers and Heat Pumps with Scroll compressors and plate exchangers

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

The JWH 051÷172 S/K/P 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 polyester powder plate painting structure, Scroll compressors and plate 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; and 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

Power range

  • 55.0-195 kW
  • 16.0-55.0 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.
  • Condenser AISI 316 stainless steel braze welded plates type 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.
  • Evaporator AISI 316 stainless steel braze welded plates type 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
  • DS Desuperheater
  • RT Total heat recovery
  • FE Antifreeze heater for evaporator
  • FO Antifreeze heater for tank and pipes
  • SS Soft start
  • IS Modbus RTU protocol, RS485 serial interface

Loose accessories

  • MN High and low pressure gauges
  • CR Remote control panel
  • SPU Inertial tank and single circulating pump
  • SPD Inertial tank and double circulating pump
  • PV2 2-Way electronic pressostatic valve
  • PV3 3-Way electronic pressostatic valve
  • AG Rubber shock absorbers
  • AG1 Rubber shock absorbers for SPU and SPD modules
  • AM Spring shock absorbers
  • AM1 Spring shock absorbers for SPU and SPD modules
CoolingCooling capacity (1)kW55,462,572,182,597,2112130149170195
Absorbed power (1)kW12,814,316,618,721,825,728,532,837,743,7
EER (1)4,334,374,344,414,464,364,564,544,514,46
Cooling (EN14511)Cooling capacity (1)kW55,062,171,682,096,7111129148169194
Absorbed power (1)kW13,615,317,619,922,927,329,934,339,345,6
EER (1)4,044,064,064,134,224,084,334,324,314,26
SEER (2)5,285,215,225,215,645,205,726,175,786,16
Energy Efficiency (2)%203200201200218200221239223238
HeatingHeating capacity (3)kW72,580,193,3105121140159180205237
Absorbed power (3)kW18,020,023,225,728,833,238,442,751,756,7
Heating (EN14511)Heating capacity (3)kW72,880,693,4105122141159180205237
Absorbed power (3)kW18,320,523,326,129,433,938,542,851,856,9
COP (3)3,983,944,014,044,144,154,134,213,964,17
SCOP (4)4,294,034,775,155,115,055,375,314,764,76
Energy Efficiency (4)%164153183198196194207204182182
Refrigerant circuits1111111122
Capacity steps2222233344
EvaporatorWater flowl/s2,652,993,443,944,645,386,237,148,129,33
Pressure dropskPa54484951445753594948
Water connections"G1 ¼"1 ¼"1 ¼"1 ¼"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"
CondenserWater flowl/s3,263,674,244,845,696,607,598,719,9211,41
Pressure dropskPa47515243465436394348
Water connections"G1 ¼"1 ¼"1 ¼"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 pressurekPa100100901301151201057511065
Tank water volumel300300300300300300300300300300
Water connections"G2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"
Sound pressureSTD version (5)dB(A)59596060626161636464
With SL accessory (5)dB(A)56565757595858606161
WeightsTransport weight (6)kg384393411423453622658681767803
Operating weight (6)kg390400420435470640680705790830


UNIT + SPU/SPDmm2310231023102310231033953395339533953395
UNIT + SPU/SPDmm680680680680680680680680680680
UNIT + SPU/SPDmm1520152015201520152015201520152015201520


  • 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 WP version are specified on technical brochure.