Versatile Chillers and Heat Pumps

This versatile series has both chiller models and heat pump models. CWE Series fluid chillers provide up to 40 tons of cooling capacity in rugged, air-cooled unit. In the heat pump version, HWE Series, the unit can be switched between heating and cooling, with heating capacities up to 375,000 Btu/h. Standard features of CWE Series and HWE Series units include a non-ferrous fluid circuit, variable speed fans, and construction that is suitable for outdoor installation. CWE Series and HWE Series models are highly configurable with a wide range of tank and pump options. A hot gas bypass valve is also an option on CWE Series chillers for processes requiring tight temperature control. All models operate on 460/3/60 power and can be equipped with an optional remote control panel.

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CWE-HWE chiller
CWE-HWE chiller

FLUID CIRCUIT

  • Standard insulated plastic tank (unpressurized)
  • Optional pressurized tank
  • Tank includes fill port, drain valve, and level sensor
  • Insulated, non-ferrous centrifugal pump and fluid circuit
  • Adjustable fluid bypass (optional) protects pump from damage if chiller inlet and outlet are closed
  • Fluid differential pressure switch protects against low-flow condition
  • Fluid pressure gauge (pump discharge)
  • 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 97/23/EC)
  • Environmentally friendly R410A refrigerant
  • Refrigerant sight glass with moisture indicator and filter-dryer
  • Externally equalized thermostatic expansion valve
  • High and low pressure switches
  • High and low pressure gauges
  • High and low pressure access fittings for maintenance and troubleshooting
  • Optional Hot Gas Bypass Valve for highly accurate control of outlet fluid temperature

COMPRESSOR

  • Hermetic scroll compressors chosen for reliability and efficiency
  • 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
  • Multi-compressor units include discharge check valves
  • 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

CONDENSER

  • Manufactured from plated copper tubes and aluminum fins
  • Cleanable, stainless steel air filter
  • Variable-speed fan allows 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 compressor(s) 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
    • Low fluid level
    • Incorrect phase sequence
    • Compressor, pump, or fan motor protector tripped
    • Temperature probe or pressure sensor failure
    • High fluid temperature
    • Evaporator anti-freeze
  • 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
  • Wheel kits are available for all models
  • Designed for ease of operation and maintenance

FACTORY TESTING OF EVERY CWE/HWE UNIT

  • Pressurization and helium leak detection of refrigeration circuit
  • Pressurization and leak testing of fluid circuit
  • Chiller/Heat pump 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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