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MCM1062R
HARVEST CYCLE - HOT GAS BYPASS
When the timer switches the icemaker into the
harvest cycle, high pressure, high temperature gas
refrigerant being discharged from the compressor
is diverted from the condenser through the hot gas
solenoid valve into each evaporator plate. During
this cycle, the refrigerant bypasses the condenser.
ln the electrical circuit, both the compressor and
the water pump are operating and the hot gas
solenoid valve is energized and OPEN and the
water inlet solenoid valve is OPEN.
The finished ice cubes are released from the sides
of each evaporator plate by the warming effect of
the hot gas condensing in each evaporator plate
and the water cascading over the ice cubes. The
released ice cubes drop into the ice storage bin
below. At the end of the harvest cycle, the timer
cam will push the actuator arm to the microswitch
IN. If the ice level control is still CLOSED, a whole
new cycle will begin. If the ice level control is
OPEN, the icemaker will begin to shut OFF.
Pump Down Cycle:
When the ice level control is open at the end of the
harvest cycle, power is removed from the liquid
line valve coil, and the pump down cycle begins.
The compressor will continue to run until the pump
down control, sensing low side pressure, opens at
20 PSIG.
October 1993
Page 22
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