Section 7 Refrigeration System
7-3
REMOTE MODELS
Remote Pre-Chill and Freeze Cycle (Models 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 evaporators. The
suction pressure decreases during the prechill.
Freeze Cycle Refrigeration Sequence
The refrigerant absorbs heat from the water running
over the evaporator surface. The suction pressure
gradually drops as ice forms.
The headmaster control valve maintains discharge
pressure in cold ambient temperatures. (See
“Headmaster Control Valve” on page 7-28.)
SV1566
EVAPORATOR
HEAT
EXCHANGER
EXPANSION
VALVE
HOT GAS
SOLENOID VALVE
STRAINER
REMOTE
CONDENSER
RECEIVER
SERVICE VALVE
COMPRESSOR
DRIER
HIGH PRESSURE VAPOR HIGH PRESSURE LI
UID LOW PRESSURE VAPORLOW PRESSURE LI
UID
LIQUID LINE
SOLENOID
RECEIVER
CHECK VALVE
CHECK VALVE
HARVEST
PRESSURE
REGULATING
HARVEST
PRESSURE
REGULATING
HEAD
PRESSURE
CONTROL
C
B
R
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