JWA 24÷40 S/IK/P/A

Home KTK Products Junior line - Small and medium size liquid Chillers and Heat Pumps AIR COOLED LIQUID CHILLERS AND HEAT PUMPS JWA 24÷40 S/IK/P/A
JWA 24÷40 S/IK/P/A

JWA 24÷40 S/IK/P/A

High efficiency air cooled liquid Chillers and Heat Pumps with axial fans, Inverter Scroll compressor and plate exchanger

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The high efficiency liquid Chillers and Heat Pumps of the JWA 24÷40 S/IK/P/A series, with R410A refrigerant, are designed to satisfy the needs of small and medium domestic and service sector environments.
With a peraluman structure corrosion-resistant over time, these units can be combined with Fan Coil units or with intermediate heat exchangers for process cooling applications.
All units are equipped with Inverter control on Scroll compressor for a better efficiency at partial loads (SEER/IPLV/SCOP).
A wide range of accessories, factory fitted or supplied separately, complete the outstanding versatility and functionality of the series.


The units are compliant to the ErP Regulation.
On request, units can be supplied with R452B or R454B refrigerant.

Versions

  • JWA - Cooling only
  • JWA/WP - Reversible Heat Pump

Power range

  • 26.0-42.0 kW
  • 7.3-12.0 Ton

Features

  • Structure with supporting frame, in peraluman and galvanized sheet. Sound-proofed compressor compartment.
  • DC INVERTER Scroll compressor with oil sight glass, internal overheat protection, crankcase heater and soundproofing cover.
  • Axial fans with low ventilation and special wing profile, directly coupled to external rotor motors.
  • Condenser made of copper tube and aluminum finned coils.
  • Evaporator AISI 316 stainless steel braze welded plates type, complete with water differential pressure switch. On the Heat Pump units it is always installed an antifreeze heater.
  • Electronic expansion valve.
  • R410A refrigerant. On request R452B or R454B refrigerant.
  • Electrical board includes: main switch with door safety interlock, fuses and pump remote control switch.
  • Condensing Control is included: electronic proportional device that ensures efficient and continuous functioning of the unit with outside air temperature down to -20 °C in cooling mode. It also allows to reduce the sound level especially at night. It consists of a fans speed controller with continuous speed regulation and high and low pressure transducers on cooling circuit.
  • Functioning in heating mode with outside air temperature down to -15 °C.
  • Microprocessor control and regulation system.
  • Advanced functions: remote set-point with 0-10V signal, remote set-point with 4-20mA signal, remote signal for second set-point activation, demand limit from digital input, management of hybrid systems, management of domestic hot water production.

Factory fitted accessories

  • BT Low water temperature kit
  • TX Coil with pre-coated fins
  • PS Single circulating pump
  • GS Single circulating pump gasket for glycol >30%
  • FE Antifreeze heater for evaporator

Loose accessories

  • CR Remote control panel
  • IS Modbus RTU protocol, RS485 serial interface
  • RP Coils protection metallic guards
  • FP Coils protection metallic guards with filter
  • AG Rubber shock absorbers
24273440
Cooling STD versionsCooling capacity (1)kW25,830,535,942,3
Absorbed power (1)kW8,09,511,313,4
EER (1)3,223,213,183,16
Cooling STD versions (EN14511)Cooling capacity (1)kW25,730,435,842,2
Absorbed power (1)kW8,19,611,413,6
EER (1)3,193,163,133,11
SEER (2)4,424,164,214,22
Energy Efficiency (2)%174163165166
Heating STD versionsHeating capacity (3)kW28,734,340,448,0
Absorbed power (3)kW8,19,911,814,0
COP (3)3,543,463,423,43
Heating STD versions (EN14511)Heating capacity (3)kW28,834,440,548,1
Absorbed power (3)kW8,210,112,014,2
COP (3)3,513,423,373,38
SCOP (4)3,743,753,543,74
Energy Efficiency (4)%147147139147
Energy Class (5)A+A+A+A+
SCOP (6)2,952,962,933,07
Energy Efficiency (6)%115115114120
Energy Class (7)A+A+A+A+
CompressorQuantityn°1111
EvaporatorWater flowl/s1,231,461,712,02
Pressure dropskPa20293131
Water connections"G1 ¼"1 ¼"1 ¼"1 ¼"
Electrical characteristicsPower supplyV/Ph/Hz400/3+N/50400/3+N/50400/3+N/50400/3+N/50
Max. running currentA21242734
Max. starting currentA11141518
Unit with pumpPump available static pressurekPa140115150105
Water connections"G1 ¼"1 ¼"1 ¼"1 ¼"
Sound pressureSTD versions (8)dB(A)60616262
WeightsTransport weightkg224239269283
Operating weightkg229244275289

Dimensions

24273440
LSTDmm1850185018501850
WSTDmm1000100010001000
HSTDmm1300130013001300

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 Seasonal energy efficiency of heating at medium temperature with average climatic conditions. According to EU Regulation n. 813/2013.
  • 7 Seasonal energy efficiency class of heating at medium temperature with average climatic conditions. According to EU Regulation n. 811/2013.
  • 8 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • N.B. (1) Weights of WP version are specified on technical brochure.