Air Cooled Condensing Units

Air Cooled Condensing Units

Mueller air-cooled condensing units can be utilized for standard refrigeration applications, or when you add the modified options you have a condensing unit that is designed specifically to work with Mueller chillers. Mueller air-cooled condensing units come in sizes ranging from 5 thru 80 horsepower.

Standard Features

  • Outdoor weather hood.
  • Weatherproof control panel.
  • Condenser with subcooling circuit.
  • Semi-hermetic compressor with crankcase heater.
  • Liquid receiver.
  • Suction/discharge vibration absorbers.
  • Head pressure control valve.
  • Liquid line filter drier and sight glass.
  • Suction filter (replaceable core filter for units 15 hp and larger).
  • Suction accumulator.
  • Liquid and suction service valves.
  • Non-fused disconnect.
  • Compressor and condenser fuses (as required).
  • Oil pressure control.
  • High/low pressure control.
  • Manual pump-down switch.
  • Compressor contactor.
  • Condenser fan contactors (as required).
  • Fan-cycling thermostat.

Modified Unit Features

  • Standard features listed above.
  • Accumulator with heat exchanger in lieu of standard suction accumulator.
  • Hot-gas bypass valve (piped into accumulator) with hot-gas solenoid valve.
  • Liquid injection valve (piped into accumulator) with liquid injection solenoid valve.
  • Separate low-pressure control to activate hot-gas bypass and liquid injection solenoid valves.


  • Cylinder unloading.
  • Accumulator with heat exchanger.
  • Hot-gas bypass.
  • Liquid injection.
  • Oil separator.
  • Insulated and heated receiver.