Manitowoc J-1300, Service Manual

Page: 109 / 165

Section 7 Refrigeration System
7-4
Remote Harvest Cycle (Models J450/J600/J800/J1000)
Harvest Cycle Refrigeration Sequence
Hot gas flows through the energized hot gas valve,
heating the evaporator. The hot gas valve is sized to
allow the proper amount of hot gas into the
evaporator. This specific hot gas valve sizing, along
with the harvest pressure regulating (H.P.R.) system,
assures proper heat transfer, without the hot gas
condensing to liquid and slugging the compressor.
The harvest pressure regulating (H.P.R.) valve helps
maintain the suction pressure during the harvest
cycle. (See “H.P.R. System” on page 7-26.)
SV1567
EVAPORATOR
HEAT
EXCHANGER
EXPANSION
VALVE
HOT GAS
SOLENOID VALVE
STRAINER
REMOTE
CONDENSER
RECEIVER
SERVICE VALVE
COMPRESSOR
DRIER
HIGH PRESSURE VAPOR
HIGH PRESSURE LIQUID
LOW PRESSURE VAPOR LOW PRESSURE LIQUID
LIQUID LINE
SOLENOID
VALVE
RECEIVER
CHECK VALVE
CHECK VALVE
HARVEST
PRESSURE
REGULATING
VALVE
HARVEST
PRESSURE
REGULATING
SOLENOID VALVE
HEAD
PRESSURE
CONTROL
VALVE
C
B
R