TWA/FC 302÷1622 VV/Y

Aircooled liquid Chillers Free-Cooling with axial fans, Screw (Inverter) compressors and shell and tube exchanger

_ktk_icon_versions_cooling_only.png _ktk_icon_compressor_Screw_inverter.png _ktk_icon_compressor_screw.png _ktk_icon_axial_fan.png _ktk_icon_shell_and_tube.png _ktk_icon_free_cooling.png _ktk_icon_gsm.png _ktk_icon_refrigerant_R134a.png ktk_icon_refrigerant_R513A.png

The liquid Chillers of the TWA/FC 302÷1622 VV/Y series, with R134a refrigerant, offer innovative technology to meet the needs of large systems for both domestic as well as industrial applications requiring the production of cooled water continuously year-round.
During the cold months, in FREE-COOLING operating mode, the liquid returning from the system is cooled directly by forced convection of outdoor air through the condensing coil, thus saving energy by not operating the unit's Screw compressors. A 3-Way valve system is controlled by the electronic microprocessor controller, allowing functioning in CHILLER, FREE-COOLING or MIXED (simultaneously CHILLER and FREE-COOLING) modes.
Are available as option the new EC Inverter fans with high available static pressure and efficiency.
The models 1202-B÷11702-B are compliant to ErP 2021 Regulations for process cooling application with EC or ECH accessory (EC Inverter fans). The models 1902-B÷6002-B are compliant to ErP 2021 Regulations for process cooling application if provided with EC or ECH accessory (EC Inverter fans) and ID accessory (Inverter on all compressors).
On request, units can be supplied with R513A refrigerant.


  • TWA/FC - Cooling only

Power range

  • 217-1460 kW
  • 62.0-415 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.
  • Axial fans directly coupled to an electric motor with external rotor.
  • Condenser made of copper tubes and aluminium finned coils combined with FREE-COOLING coils.
  • 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.
  • R134a refrigerant. On request R513A refrigerant.
  • Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors and thermocontacts for fans.
  • Condensing Control is included: electronic proportional device that ensures efficient and continuous functioning of the unit with outside air temperature down to –20 °C. It also allows to reduce the sound level especially at night. It consists of a fans speed controller with continuous speed regulation, high and low pressure transducers on cooling circuit and an electrical heater on electrical board.
  • Microprocessor control and regulation system.

Factory fitted accessories

  • IM Automatic circuit breakers
  • SL Unit silencement
  • BT Low water temperature kit
  • EC EC Inverter fans
  • ECH EC Inverter fans with high available static pressure
  • HRT/P Total heat recovery in parallel
  • TX Coil with pre-coated fins
  • 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
  • II Inverter on one compressor and soft start for other compressors
  • ID Inverter on all compressors
  • SS Soft start
  • 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
  • RP Coils protection metallic guards
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
  • FL Flow switch
CoolingCooling capacity (1)kW217258315375418473569709847994113912881460
Absorbed power (1)kW8397114148157184210263316370434490541
EER (1)2,612,662,762,532,662,572,712,702,682,692,622,632,70
Cooling (EN14511)Cooling capacity (1)kW215255311371413469565702838984112612721436
Absorbed power (1)kW85100118152162188215270325380447507565
EER (1)2,532,552,642,442,552,492,632,602,582,592,522,512,54
SEPR with EC or ECH accessory (2)5,005,045,035,035,305,205,405,405,205,205,205,305,30
SEPR with EC or ECH accessory and ID (2)5,355,395,385,385,645,575,765,745,505,575,505,625,64
Free-Cooling cycleAir temperature (3)°C-2,5-2,0-2,0-4,5-3,7-4,0-3,5-4,3-4,3-4,6-4,7-4,1-3,9
Absorbed power (3)kW8121212121620202222252936
Refrigerant circuits2222222222222
Capacity stepsSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessStepless
Water circuit.Water flowl/s11,2213,3416,2919,3821,6124,4529,4236,6543,7951,3858,8866,5875,47
Pressure dropskPa125170180168191130115160164160200225300
Water connectionsDN100100100125125125150150150200200200200
Electrical characteristicsPower supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA194201237261293337393437565649713720896
Max. starting currentA2562632813373534055045267708128488551688
Unit with tank and pumpPump available static pressurekPa125105130105100140105115130140170120115
Tank water volumel1100110011001100110011002000200020002000---------
Water connectionsDN100100100125125125150150150200200200200
Sound pressureSTD version (4)dB(A)75757676767777777979797980
With SL accessory (4)dB(A)72727373737474747676767677
WeightsTransport weight (5)kg325033203620380541804510531068207710860595901007011750
Operating weight (5)kg3450352038704060453048505700742083509410105501090012970




  • 1 Chilled water (with ethylene glycol at 30%) from 15 to 10 °C, ambient air temperature 35 °C.
  • 2 Seasonal energy efficiency of high temperature process cooling according to EU Regulation No. 2016/2281.
  • 3 Ambient air temperature at which the cooling capacity indicated in point (1) is reached.
  • 4 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • 5 Unit without tank and pump.