Manitowoc S Service Manual page 109

Section 7
REMOTE MODELS
HEAT
EXCHANGER
LIQUID
LINE
SOLENOID
VALVE
DRIER
RECEIVER
SERVICE
VALVE
HIGH PRESSURE VAPOR
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.
Part Number 80-1480-3
EXPANSION VALVE
STRAINER
COMPRESSOR
HARVEST PRESSURE
REGULATING VALVE
X
H.P.R. SOLENOID
VALVE
HIGH PRESSURE LIQUID
Figure 7-3. Remote Pre-Chill and Freeze Cycle
X
CHECK VALVE
CHECK VALVE
RECEIVER
LOW PRESSURE LIQUID
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 ambient temperatures below 70
(See "Headmaster Control Valve".)
Refrigeration System
EVAPORATOR
HOT GAS SOLENOID VALVE
REMOTE
CONDENSER
HEAD
PRESSURE
CONTROL
VALVE
B
R
C
LOW PRESSURE VAPOR
SV1566
F (21.1 C).
° °
7-3