U-Line ULN-29R Ice Maker User Manual


 
3-2
Section 3 - Service and Repair
Frost Free Refrigeration
COOLING MODE
Bypass solenoid closed.
Evaporator fan operating.
Refrigerant flows through capillary tubes.
Normal vapor/compression cycle refrigeration (see page 3-
1).
DEFROST MODE
Bypass solenoid valve open.
Refrigerant flows through bypass system.
Vapor flows from condenser to evaporator without a
phase change.
Drain heater on (U-CO29F only).
Figure 2. Frost Free Refrigeration System.
SOLENOID VALVE
CAPILLARY TUBE
VALVE IS CLOSED
FLOW WHEN SOLENOID
DRYER
CONDENSER
COMPRESSOR
EVAPORATOR
VALVE IS OPEN
FLOW WHEN SOLENOID
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