Two-Stage Condensing Units & Systems

Two stage condensing, units with Bitzer compressors, matched with 1 or 2 Medium Profile evaporators are designed for applications requiring a suction temperature below -40° F SST. The two stage system can operate down to -65° F SST which allows for room temperatures down to -50° F. These systems are ideal for blood, plasma, pharmaceutical, food and various other storage needs.

Standard Features

Condensing Unit
  • Bitzer two stage compressor
  • Discharge and suction vibration eliminators
  • Discharge muffler
  • Encapsulated high pressure switch
  • Adjustable low pressure switch with superhose
  • Crankcase heater and crankcase pressure regulator
  • Compressor contactor w/circuit breaker
  • Floating Tube™ coil design
  • Flooded head pressure controls
  • Pressure fan cycling (multiple fan units)
  • Oil separator - return line solenoid valve and time delay
  • Mechanical subcooler
  • Replaceable core liquid line filter drier
  • Suction accumulator and replaceable core suction filter
  • Defrost timer
  • Defrost heater and evaporator fan contactors with fusing
  • Phase monitor, anti short cycle timer, and pumpdown switch
  • Thermo-Flex™ coil design
  • Thermostatic expansion valve factory installed
  • Liquid line solenoid valve factory installed
  • Low temperature motors
  • Double wall insulated drain pan
  • Adjustable defrost termination and fan delay


For more information, please contact your local Sales Representative or Account Engineer.