TWH/DR 291÷1541 TT/Y


_ktk_icon_versions_cooling_only.png _ktk_icon_compressor_turbocor.png _ktk_icon_flooded_shell_and_tube.png _ktk_icon_gsm.png _icon_A_CLASS_2018_KTK_cooling.png _ktk_icon_refrigerant_R134a.png ktk_icon_refrigerant_R513A.png

The innovative TWH/DR 291÷1541 TT/Y units for Dry-Cooler operation, featuring A CLASS energy efficiency, are designed to provide an effective solution for highly selective system needs. Efficiency at partial loads, low breakaway starting current, low levels of operational noise, reduced weight, specific design and handling of every manufacturing aspect, make the series the top of the range.
Using TURBOCOR dynamic partial-load oil-free magnetic levitation compressors, managed by the TURBOSOFT self-adaptive electronic control and flooded shell and tube evaporators, provide high energy performance, with unbeatable SEER values, with minimum water content, and an excellent silent functioning. Compared to traditional Screw compressor units, TURBOLINE units have low operational costs during their entire use, with savings that can even reach 50%.
The units are compliant to the 2021 ErP Regulation.
On request, units can be supplied with R513A refrigerant.


  • TWH/DR - Cooling only for Dry-Cooler

Power range

  • 298-1584 kW
  • 85.0-450 Ton


  • Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
  • Semi-hermetic centrifugal compressors with dual Turbocor turbine, oil free, magnetic rising rotor, thermal protection, continuous capacity adjustment system thanks to built-in INVERTER, automatic anti-cavitation system. The power circuit of the compressor is fitted with a set of electrolytic condensers to control the rising in the event of a power failure, reactor for the power factor correction, EMI filter for electromagnetic compatibility.
  • Shell and tube type condenser, with easily removable cast iron heads to enable access for maintenance operations.
  • High efficiency flooded shell and tube type evaporator, with one circuit on the refrigerant side and one on the water side, complete with water differential pressure switch.
  • Cooling circuit shut-off valves on suction, discharge and liquid line.
  • Electronic expansion valve.
  • Electronic high and low pressure gauges.
  • R134a refrigerant. On request R513A refrigerant.
  • Electrical board includes: main on-off switch with door lock, fuses, electronic/digital overload device to protect the compressors, interface relay and terminals for external connections.
  • TURBOSOFT control and regulation system, equipped with RS485 serial interface, can be supplied with an optional Web Monitoring device for remote monitoring via GPRS/EDGE/3G/TCP-IP network.

Factory fitted accessories

  • IM Automatic circuit breakers
  • HR Desuperheater
  • HRT Total heat recovery
  • FE Antifreeze heater for evaporator
  • TS Touch Screen Interface
  • WM Web Monitoring - Wireless remote monitoring (GPRS/EDGE/3G/TCP-IP)
  • 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
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
  • FL Flow switch
CoolingCooling capacity (1)kW29839559879289411851584
Absorbed power (1)kW7092141186211277372
EER (1)4,264,294,244,264,244,284,26
Cooling (EN14511)Cooling capacity (1)kW29739459678989111801579
Absorbed power (1)kW7194144189214282376
EER (1)4,184,194,144,174,164,184,20
SEER (2)8,158,458,668,408,408,679,24
Energy Efficiency (2)%318330338328328339362
Refrigerant circuits1111111
Capacity stepsSteplessSteplessSteplessSteplessSteplessSteplessStepless
EvaporatorWater flowl/s14,2418,8728,5737,8442,7156,6275,68
Pressure dropskPa44454850545642
Water connectionsDN100100125125150150200
CondenserWater flowl/s19,2025,4038,5551,0257,6476,26102
Pressure dropskPa58525753595240
Water connectionsDN100100125125150150200
Electrical characteristicsPower supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA145231290462435693924
Max. starting currentA22147233292464695
Sound powerSTD version (3)dB(A)90929395959697
Sound pressureSTD version (4)dB(A)72747576767778
WeightsTransport weightkg1840211529553430385544157555
Operating weightkg1980230032203790424049408450




  • 1 Chilled water from 12 to 7 °C, temperature at the condenser (with ethylene glycol at 35%) from 40 to 45 °C.
  • 2 Seasonal energy efficiency of cooling at low temperature. According to EU Regulation n. 2016/2281.
  • 3 Sound power level according to Standard ISO 3744 and Eurovent 8/1.
  • 4 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.