Screw Compressor Fluid Chillers

Select a CWV chiller to meet your requirements for extremely high process or comfort cooling loads. These chillers feature refrigerant screw compressors, microchannel condensers, and shell & tube evaporators to provide 75 to 350 tons of cooling capacity. Screw compressors on the CWV operate quietly and with high efficiency, and are equipped with stepless capacity control, oil level sensor, and crankcase heater. The all-aluminum condensers are coupled with speed-regulated axial fans. The evaporator is instrumented with a temperature probe for freeze protection and a water differential pressure switch for low flow detection. Designed for demanding industrial applications, every CWV chiller is factory tested at full load conditions to ensure a smooth start-up. 

Also Available in a Water-Cooled Version: CWW Series

CWV chiller

FLUID CIRCUIT

  • Standard models include a shell and tube evaporator, without tank or pump
  • Available with single pump in a range of pressures
  • Fluid differential pressure switch protects evaporator against low flow condition
  • Fluid pressure gauge (pump discharge pressure)
  • Ability to use glycol mixtures up to 50%

REFRIGERATION CIRCUIT

  • Manufactured with high-quality materials following rigorous brazing procedures and conforming to international standards (PED 2014/68/EU)
  • Environmentally friendly R134a refrigerant
  • Refrigerant sight glass with moisture indicator and filter-dryer
  • Electronic expansion valve and liquid line solenoid valve
  • High and low pressure transducers and switches
  • High and low pressure gauges
  • High and low pressure access fittings for maintenance and troubleshooting

COMPRESSOR

  • Single or tandem, semi-hermetic screw compressors are quiet, reliable, and efficient
  • Stepless capacity control matches compressor output to the cooling requirement
  • Oil level sensor protects against loss of lubrication
  • Optional soft start provides reduced peak amp draw
  • Mounted on rubber isolators for noise reduction
  • Protected against reverse rotation by an electronic phase monitor
  • Crankcase heater prevents liquid slugging on start-up

EVAPORATOR

  • Shell and tube heat exchanger design
  • Evaporators are protected against freezing by the microprocessor controller
  • Includes differential pressure switch to detect low water flow condition

CONDENSER

  • Microchannel design is compact and highly efficient
  • All-aluminum construction eliminates the risk of galvanic corrosion
  • Variable-speed fans allow operation over a wide ambient
    temperature range

ELECTRICAL PANEL

  • Manufactured in compliance with international standards (EN 60204) using UL-recognized components
  • Electrical cabinet constructed of powder-coated galvanized steel
  • Disconnect switch with door lock prevents access to panel when energized

MICROPROCESSOR CONTROLLER

  • Optimizes unit performance and maintains fluid temperature
  • Controls and displays the fluid temperature
  • Adjusts the compressor output (stepless capacity control) to match the system heat load
  • Turns the pump on and off and refulates the condenser fan speed
  • Protected by a watertight cover
  • Displays key operating parameters and the following alarm conditions
    • High and low refrigerant pressure
    • High refrigerant discharge temperature
    • Low fluid differential pressure
    • Incorrect phase sequence
    • Compressor, pump, or fan motor protector tripped
    • Temperature probe or pressure sensor failure
    • High fluid temperature
    • Evaporator anti-freeze
    • Electronic expansion valve fault
  • Optional remote control panel

UNIT CONSTRUCTION AND MAINTENANCE

  • Cabinet frame and panels are powder-coated and suitable for outdoor installation
  • Panels are easily removed, providing convenient access for maintenance and repair
  • All fasteners are stainless or zinc-plated steel for corrosion resistance
  • Protection to IP54 standard on all models; suitable for outdoor installation
  • Designed for ease of operation and maintenance

FACTORY TESTING OF EVERY CWV UNIT

  • Pressurization and helium leak detection of refrigeration circuit
  • Pressurization and leak testing of fluid circuit
  • Chiller performance and power consumption at full load
  • Proper operation of all controls, safety devices, and alarms
  • Electrical tests according to international standards (EN 60204)