For High Capacities

CWB Series chillers deliver high cooling capacity (up to 150 tons) to meet the requirements of centralized or plant-wide applications. All units operate on 460/3/60 power and include variable speed condenser fans, tandem scroll compressors, and stainless steel brazed plate evaporators. The chiller package is designed for outdoor installation and allows for easy access for maintenance and repair. The microprocessor controller features a communications port and a user interface with a multi-line display for clear indication of operating parameters and alarms. Single or duplex pumps with various pressure ratings, pressurized or unpressurized tanks, non-ferrous fluid circuit, and remote control panel are among the many options offered on CWB Series chillers.

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CWB chiller
CWB chiller

FLUID CIRCUIT

  • Standard models include a stainless steel, brazed plate evaporator, without tank or pump
  • Options include single and dual pumps in a variety of pressures
  • Available with insulated tank in carbon steel or stainless steel
  • Optional non-ferrous fluid circuit
  • 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 R410A 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

  • Tandem, hermetic scroll compressors chosen for reliability
    and efficiency
  • Multiple compressors for energy efficiency and low starting amps
  • Mounted on rubber isolators for noise reduction
  • Scroll compressors are especially quiet and can handle liquid return without damage
  • Protected against reverse rotation by an electronic phase monitor
  • Crankcase heater prevents liquid slugging on start-up

EVAPORATOR

  • Stainless steel, brazed plate evaporators are compact and highly efficient
  • Evaporators are protected against freezing by the microprocessor controller
  • Evaporator has two refrigerant circuits and a single fluid circuit
    (CWB270 to CWB570)

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
  • Turns the compressors on and off while protecting against short cycling
  • Turns the pump(s) on and off; equalizes pump operating times
    (double pump models)
  • Regulates 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 CWB 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)
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