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Freezer
Evaporator
Fresh Food
Evaporator
Condenser
Drier
Capillary
3-Way
Valve
Jumper
Tube
Accumulator
Compressor
Condenser Fan
Freezer Fan
Low Pressure Vapor
Mix of Liquid and Vapor
Low Pressure Liquid
High Pressure Liquid
Mix of Liquid and Vapor
High Pressure Vapor
The compressor compresses R134a refrigerant, raising its pressure and temperature. Refrigerant vapor is
pumped out the compressor discharge, down thru the drain pan loop, up thru the condenser coil, around the
condenser loop, thru the drier, and into the 3-way valve. By the time the refrigerant has reached the 3-way
valve, it has completely condensed into a liquid. Depending upon whether the main control board opens the
3-way valve to the freezer evaporator or the fresh food and freezer evaporators, refrigerant fl ows thru the
appropriate capillary tube and into the evaporator. As the high pressure liquid passes thru the capillary and
enters the low pressure evaporator, it quickly expands and evaporates. During evaporation, the refrigerant
absorbs heat, becoming cold. At the outlet of the freezer evaporator, an accumulator captures any
remaining liquid, allowing only low pressure vapor to return to the compressor thru the suction line.
Refrigeration System
FREEZER SECTION COOLING - Position B
(Continued next page)
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