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The freeze cycle is controlled by a
thermistor, which is mounted at the
evaporator outlet. The pump is
spraying water up into the evaporator
cells to form the square IM cubes.
The evaporator temperature lowers
as the ice cubes form.
A thermistor temperature of –9.4°F
signals the control board to begin
harvest and energize the hot gas
valve and actuator motor circuit. The
actuator motor now turns counter
clock wise to lower the water pan.
The switch lever moves the actuator
toggle switch to the left. This sets the
actuator motor circuit to raise the
water plate at the end of harvest. The
board energizes the inlet water valve.
Unlike the initial harvest, the normal
harvest is controlled by the
thermistor. When the thermistor
reaches 59°F, the control board de-
energizes the hot gas valve and
energizes the condenser fan motor.
The actuator motor energizes to raise
the plate. When the plate reaches the
evaporator, the actuator toggle
switch is moved back to the right.
The board de-energizes the inlet
water valve and the freeze cycle
begins again. The average harvest
cycle is about 3 minutes.