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

Built-in ice maker with internal pump

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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 across the evaporator surface to form the ice. In the harvest cycle, the ice is released. A

complete cycle can take 15 to 40 minutes, depending on temperature and operating conditions.

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.

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.

The ice maker begins with a fixed charge of water that is contained in the water trough. During the

ice-making process, fresh water enters the water trough continuously as the water from the trough

freezes on the evaporator.

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