JWA 051÷172 S/K

Home KTK Products Junior line - Small and medium size liquid Chillers and Heat Pumps AIR COOLED LIQUID CHILLERS AND HEAT PUMPS JWA 051÷172 S/K
JWA 051÷172 S/K

JWA 051÷172 S/K

Air cooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and shell and tube exchanger

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The liquid Chillers and Heat Pumps of the JWA 051÷172 S/K series, with R410A refrigerant, are designed for medium-sized service sector or industrial ambients.
They are used, combined with Fan Coil units, for the air conditioning of the rooms or to remove the heat developed during industrial processes. They can be supplied with Modbus RTU protocol through RS485 serial interface.
Equipped with axial fans, Scroll compressors and shell and tube exchanger, even in the super silent version, these units can be completed by a hydraulic circuit with tank, with pump, with tank and pump.
Are available as option the new EC Inverter fans with high available static pressure and efficiency for indoor ducted installation.

The units are compliant to the ErP 2021 Regulation for process cooling application; for comfort cooling application they are compliant if provided with EC or ECH accessory (EC Inverter fans). Heat Pump models are compliant to ErP Regulations.
On request, units can be supplied with R452B or R454B refrigerant.

Versions

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

Power range

  • 49.0-179 kW
  • 14.0-51.0 Ton

Features

  • 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.
  • Axial fans directly coupled to an electric motor with external rotor.
  • Condenser made of copper tubes and aluminium finned coil.
  • 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 and thermocontacts for fans.
  • Microprocessor control and regulation system.

Factory fitted accessories

  • IM Automatic circuit breakers
  • RE Adjustable minimum/maximum voltage and phase control relay
  • SL Unit silencement
  • RFM Cooling circuit shut-off valve on discharge line
  • RFL Cooling circuit shut-off valve on liquid line
  • CT Condensing control down to 0 °C
  • CC Condensing control down to -20 °C
  • BT Low water temperature kit
  • EC EC Inverter fans
  • ECH EC Inverter fans with high available static pressure
  • HR Desuperheater
  • HRT/S Total heat recovery in series
  • TX Coil with pre-coated fins
  • EW External water connections
  • SP Inertial tank
  • PU Single circulating pump
  • PUI Inverter single circulating pump
  • PD Double circulating pump
  • PDI Inverter double circulating pump
  • SPU Inertial tank and single circulating pump
  • SPUI Inertial tank and Inverter single circulating pump
  • SPD Inertial tank and double circulating pump
  • SPDI Inertial tank and Inverter double circulating pump
  • GS Single circulating pump gasket for glycol >30%
  • GD Double circulating pump gaskets for glycol >30%
  • FE Antifreeze heater for evaporator
  • FN Antifreeze heater for pipes
  • FQ Antifreeze heater on evaporator/tank and pipes
  • FZ Antifreeze heater for evaporator, single pump and pipes
  • FH Antifreeze heater for evaporator, double pump and pipes
  • 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
  • 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
  • MN High and low pressure gauges

Loose accessories

  • CR Remote control panel
  • RP Coils protection metallic guards
  • FP Coils protection metallic guards with filter
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
  • FL Flow switch
051061071081091101111131152172
CoolingCooling capacity (1)kW49,055,062,473,384,395,2109129149179
Absorbed power (1)kW16,618,821,525,328,631,637,543,750,758,8
EER (1)2,952,932,902,902,953,012,912,952,943,04
Cooling (EN14511)Cooling capacity (1)kW48,954,962,273,084,195,0109129149179
Absorbed power (1)kW16,719,021,925,829,032,038,044,251,459,5
EER (1)2,922,892,852,842,902,972,862,912,893,00
SEER (2)3,793,813,723,743,833,823,633,763,863,86
Energy Efficiency (2)%149149146147150150142147151151
HeatingHeating capacity (3)kW55,761,970,280,791,4105119137156188
Absorbed power (3)kW17,819,622,825,729,133,438,144,251,161,0
COP (3)3,133,163,083,143,143,143,123,103,053,08
Heating (EN14511)Heating capacity (3)kW55,862,170,581,191,7105119137156188
Absorbed power (3)kW18,019,923,426,429,734,038,944,952,061,9
COP (3)3,103,123,023,073,093,103,073,063,013,04
SCOP (4)3,283,233,213,243,293,293,213,293,253,25
Energy Efficiency (4)%128126125127129129125129127127
Energy Class (5)A+A+A+A+------
CompressorQuantityn°2222233344
Refrigerant circuitsn°1111111122
Capacity stepsn°2222233344
EvaporatorWater flowl/s2,342,622,983,494,024,545,196,157,108,53
Pressure dropskPa22295055403945364338
Water connections"G1 ½"1 ½"2"2"2 ½"2 ½"2 ½"3"3"3"
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 currentA4144556067798697112131
Max. starting currentA164166179192235202218264244298
Unit with tank and pumpPump available static pressurekPa160150125110140185170170155145
Tank water volumel470470470470470470470470660660
Water connections"G2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"
ECH fan available static pressureSTD versionsPa90801001001008095756060
SSL versionsPa858575757050706060---
Sound pressureSTD versions (6)dB(A)61616464656767676767
With SL accessory (6)dB(A)59596262636565656565
WeightsTransport weight (7)kg641661701719844931971111211921428
Operating weight (7)kg6606807207408709601000115012301470

Dimensions

051061071081091101111131152172
LSTDmm2350235023502350235023502350235035503550
SSLmm235023502350235023502350355035503550---
WSTD-SSLmm1100110011001100110011001100110011001100
HSTD-SSLmm1950195019501950225022502250225022502250

Notes

  • 1 Chilled water from 12 to 7 °C, ambient air temperature 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, ambient air temperature 7 °C d.b./6 °C w.b.
  • 4 Seasonal energy efficiency of heating at low temperature with average climatic conditions. According to EU Regulation n. 813/2013.
  • 5 Seasonal energy efficiency class of heating at low temperature with average climatic conditions. According to EU Regulation n. 811/2013.
  • 6 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • 7 Unit without tank and pump.
  • N.B. (1) Weights of SSL and WP versions are specified on technical brochure.