HOW THE ICE MACHINE WORKS
A general description of how the Supera Cubers works is given below. With the ICE/OFF/WASH
switch in the ice position, the compressor, water pump and condenser fan motor (when
applicable) will energize starting the freeze cycle.
During the freeze cycle, water is circulated over the evaporator(s) where the ice cubes are
formed. When the suction pressure has pulled down to the proper cut-in pressure of the timer
initiate (pressure control), the contacts will close and energize the time delay module (timer). At
this time, the cubes will be close to completion.
The remaining portion of the freeze cycle is determined by the timer setting. The timer is pre-set
at the factory to achieve the proper ice bridge thickness but may need to be adjusted upon initial
start-up.
Once the amount of time on the timer has passed, the control relay will be energized and the
machine will enter harvest. Power is now supplied to the water purge valve, hot gas valve, and the
harvest motor.
The water purge valve opens, and allows the water pump to purge the water remaining in the
water trough, removing impurities and sediment. This allows the machine to produce clear ice
cubes and keep mineral build up at a minimum.
The hot gas solenoid opens allowing hot gas to go directly to the evaporator, heating the
evaporator and breaking the bond between the evaporator and the ice slab.
The harvest assist motor, which is also energized during harvest, turns a slip clutch, which pushes
a probe against the back of the ice slab. Once the evaporator has reached approximately 40°F
(4.5°F) in temperature, the slip clutch overcomes the bonding of the ice to the evaporator and
pushes the slab of ice off of the evaporator and into the storage bin.
The clutch also actuates a switch that rides on the outer edge of the clutch. When the clutch
completes one revolution, the switch is tripped and the machine enters the next freeze cycle.
Supera models utilize a thermostatic bin control in place of a mechanical bin switch.
© Supera
September 2015
1
© Supera September 2015 1
© Supera
September 2015
8