December, 1987
Page 8
Harvest cycle
The cube size
control
thermostat also
closes the circuit
to the solenoid
of the hot gas
valve and the
solenoid of the
inlet water valve.
The hot gas
valve opens and
hot refrigerant
gas is
discharged into
the evaporator.
The inlet water
valve opens and
a fresh supply of
water flows to
the top of the
evaporator and
then drains into
the reservoir.
The ice cubes
are released
from the inverted cube cups in the
evaporator by the warming effect of the hot
refrigerant gas condensing in the
evaporator tubing, plus the incoming water
flowing around the inverted cups. The
released ice cubes drop onto the spray
platform and
through the
curtain assembly
into the ice
storage bin.
The cube size
control thermostat
senses the
warmer
temperatures of
the harvest cycle,
and at a preset
temperature,
opens the circuit
to the solenoid of
the hot gas valve,
and the inlet water
valve. Both
valves close,
incoming water
stops and hot gas
is diverted back to
the condenser.
The harvest cycle
is complete, and
the freezing cycle
restarts.
The automatic icemaking process
continues until the bin is full of ice, and the
bin thermostat senses a colder
temperature.
The bin thermostat then opens the circuit to
all components and the automatic
icemaking process stops.
WATER PUMP,
ON DURING
FREEZE
DRAINS
WATER TO EVAPORATOR
INLET WATER
VALVE, OPEN
DURING
HARVEST
WATER
SPRAY
CS55: HOW IT WORKS:
WATER
Freezing cycle
The refrigeration process creates cold
temperatures within the evaporator coils
and removes heat from the water sprayed
up into the inverted ice cube cups. When
enough heat is removed, the water
changes into ice, and forms where it is the
coldest: in the ice cube cups.
Minerals contained in the supply water will
not freeze and are drained away. Mostly
pure water will be frozen into the ice cubes.
During the freezing cycle, the compressor,
fan motor, and water pump are operating.
Water is continuously freezing or being
sprayed and recirculated. When
evaporator temperature is lowered to the
cold temperature setting of the cube size
control, it ends the freezing cycle and
starts the harvest cycle.
Harvest cycle
