Refrigeration Systems

Master-Bilt’s M-Series models are specially designed to function in high temperature environments.

Components are pre-wired and factory mounted. Package options on the basic standard remote unit include a factory pre-charged system with quick-connect liquid and suction line sets up to 50 ft.

M-Series units are available in hermetic and compliant scroll compressor models, with or without matching evaporator coils. They are factory assembled on a galvanized steel angle leg base and range from 1/4 to 15 HP. For needs above 15 HP, please consult factory for the best option, including high efficiency rack systems.

Standard Features

  • EPA SNAP compliant with HFO blended refrigerants (R448A/R449A)
  • Medium temp units available in hermetic and compliant scroll compressor models
  • Compliant, energy efficient scroll compressors featured exclusively in low temp units for added reliability
  • With or without matching evaporator coils
  • Factory assembled on a galvanized steel angle leg base.
  • Range from 1/4 to 15 H.P.
  • Generously-sized condenser for dependable performance
  • Pre-piping kit including sight glass
  • Pre-wiring kit (defrost timer standard on low temp models only)
  • Preset non-adjustable high and low pressure controls for medium temp units. Non-adjustable high and adjustable low pressure controls for low temp.
  • Crankcase heater
  • Head pressure control valve ensures proper operation in low ambient conditions
  • Suction service valve
  • Heavy-duty galvanized steel base
  • Liquid line filter/drier
  • Pre-wired electrical control panel
  • Timer (standard on low temp models only)
  • Compressor contactor
  • Defrost heater contactor (when required)
  • Rifled tubes in condenser add efficiency
  • PSC condenser fan motors
  • Large liquid receiver (for max. 100 ft. line run)
  • One year limited compressor warranty (optional four year extended warranty available)


  • Special voltages
  • Insulated and heated receiver (thermostatically controlled)
  • Suction accumulator (shipped loose)
  • Coated condenser coils
  • Oil separator
  • Phase loss/low voltage monitor
  • Factory pre-assembled evaporator coil (includes factory pre-mounting of thermostatic air control and expansion valve)
  • Factory pre-charged system with quick connect liquid and suction line sets up to 50 ft. (specify length when ordering)
  • Adjustable low pressure control for medium and high temp units
  • Dual pressure control (adjustable)
  • Circuit breaker
  • Suction filter
  • Fan cycling switch
  • Pre-mounted solenoid at evaporator
  • Liquid line solenoid valve (shipped loose)
  • Timer for medium temp units
  • Heavy-duty rack base
  • Energy saving Master Controller electronic control system
  • Reverse Cycle Defrost option for Master Controller 
  • Extended four year limited compressor warranty


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