How The Machine Makes Ice; How The Machine Uses The Water - EdgeStar IB450SSP Owner's Manual

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IMPORTANT:
• Although the unit has been tested and cleaned at the factory,
due to long-term transit and storage, the first batch of cubes
must be discarded.
• Never turn the water supply tap off when the ice maker is
working.
• Never touch the evaporator when the machine is running.
• Except to take ice from the unit, keep the door closed to reduce
melting and ensure proper ice formation.

How the machine Makes Ice

Turn the unit on by pressing the ON/OFF button on the control panel. The
machine will automatically start the ice making stage. There are two
distinct cycles: freeze and harvest. During the freeze cycle, water flows to
the evaporator surface. In the harvest cycle, the ice is released and water
enters the machine. A complete cycle can take 15 to 40 minutes,
depending on temperature and operating conditions.
Freeze: During the freeze cycle the compressor is pumping refrigerant,
the fan motor is blowing air and the water pump is circulating water.
When the batch of ice has been fully formed, the ice maker stops the
freeze cycle and begins the harvest cycle.
Harvest: During the harvest cycle the compressor is still operating, but
the water pump has stopped. The hot gas valve opens, diverting hot
refrigerant gas into the evaporator. The gas warms the evaporator,
causing the cubes to slide, as a unit, off the evaporator and into the
storage bin. The freeze cycle will restart when all the cubes have been
harvested.

How the machine uses the water

The ice maker begins with a fixed charge of water that is contained in the
water trough. As the water flows to the freezing evaporator surface, the
portion of water that does not contain mineral impurities will freeze and
stick to the ice cube molds. The water containing impurities falls back into
the trough. During the ice-making process, fresh water enters the water
trough continuously as the water from the trough freezes continuously on
the evaporator.