Sub-Zero UC-15IPO, UC-15IO UL manual Ice Making Operation, Ice Machine Operation

Ice Machine Operation 6

Ice Making Operation

Depending on ambient conditions and cold water supply temperature, the ice making process will take approxi- mately 30 minutes.

1)Water fill cycle. (Initial start-up or start-up after automatic shut-off.) Before the compressor starts, the water inlet valve will purge old water from the system for about three minutes.

2)Refrigeration system start-up. The compressor starts after the water fill cycle and remains on throughout the freeze and harvest cycles. The condenser fan motor starts and runs throughout the freeze cycle.

3)Freeze cycle. The water pump sprays water into the inverted cups. The water freezes layer by layer, until an ice cube forms in each cup. The control system will adjust the length of the freeze cycle to conditions.

4)Harvest cycle. The water pump shuts off and the water inlet valve starts up to assist harvest and refill the water sump. The evaporator is warmed, allowing the cubes to release from the evaporator and drop into the storage bin. The control system will adjust the length of the harvest cycle to conditions and regulate whether the condenser fan will run. At the end of the harvest cycle, the ice machine will start another freeze cycle.

5)Automatic shut-off. The level of ice in the storage bin controls the automatic shut-off. When the bin is full, ice will contact the bin thermostat clip. The bin thermostat clip cools, signaling the ice machine to stop ice production. When the ice level drops and ice no longer contacts the bin thermostat clip, it will warm. The increase in temperature will restart ice production.