Section 7 Refrigeration System
7-1
Section 7
Refrigeration System
Sequence of Operation
SELF-CONTAINED AIR OR WATER-COOLED MODELS
Self-Contained Prechill and Freeze Cycle (Models J250/J320/J420/J450/J600/J800/J1000)
Prechill Refrigeration Sequence
No water flows over the evaporator during the
prechill. The refrigerant absorbs heat (picked up
during the harvest cycle) from the evaporator. The
suction pressure decreases during the prechill.
Freeze Cycle Refrigeration Sequence
The refrigerant absorbs heat from water running over
the evaporator surface. The suction pressure gradually
drops as ice forms.
SV1569
EVAPORATOR
HEAT
EXCHANGER
EXPANSION
VALVE
HOT GAS
SOLENOID VALVE
STRAINER
AIR OR WATER
CONDENSER
RECEIVER
WATER COOLED ONLY
COMPRESSOR
DRIER
HIGH PRESSURE VAPOR HIGH PRESSURE LI
UID LOW PRESSURE VAPORLOW PRESSURE LI
UID
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