Whirlpool Automatic Ice Maker User Manual download pdf (Page 7)

Harvest Cycle

Electrical System

In the electrical system, when the set temperature of the evaporator thermistor is reached, the evapo-

rator thermistor terminates power to the condenser fan and water recirculating pump, and supplies

power to the hot gas valve solenoid and the water fill valve solenoid.

Refrigeration System

In the refrigeration system, the hot gas valve opens, allowing high pressure refrigerant gas to bypass

the condenser and flow through the condenser accumulating tube. The hot gas pushes the liquid

refrigerant that has accumulated in the accumulator tube up into the evaporator. The hot liquid refrig-

erant evenly heats the evaporator plate so the ice slab releases quickly and evenly.

The ice slab, when released, slides off of the evaporator plate onto the cutter grid.

Water System

In the water system, the water valve opens, allowing water to flow into the water reservoir pan. As the

reservoir fills, the mineral-laden water from the previous ICE MAKING cycle is flushed out the overflow

tube.

As a result of the hot gas flow and the and the ice sliding off evaporator plate, the temperature rises,

and the evaporator thermistor switches the unit to the ICE MAKING cycle. This cycling, between the

ICE MAKING cycle and the HARVEST cycle, continues until the ice bin is full.

Table 1-1 shows how the electronic control board controls the various components and systems in the

ice maker for each of the ICE MAKING CYCLE and HARVEST CYCLE.

When the ice maker’s service control switch is in the “ON” position, and the bin is not full of ice, the

evaporator thermistor determines whether the unit will be in the ICE MAKING CYCLE or the HAR-

VEST CYCLE.

ON CYCLE

SECONDS

WATER VALVE

CONDENSER FAN

HOT GAS VALVE

WATER RECIRC. PUMP

COMPRESSOR

POWER ON START UP ONLY

120120 60 ICE MAKING HARVEST ICE BIN FULL *ICE BIN NOT FULL

OPERATION

>6.5°F

<52°F

<35°F

>41°F

Table 1-1

1 2 3 4 5 6 7 8 9 10 11 12 ... 33 34

No comments

Whirlpool Automatic Ice Maker User Manual Page 7