Dacor Dishwasher Service Manual download pdf (Page 4)

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DaCor builT-in Dishwasher serviCe Manual

In order to address service issues with the Dacor Built-In Dishwasher, the primary elements

of its operation are described below, as well as its physical components.

Static Fill

The cycle begins by activating the drain pump, ensuring the sump is empty. Operation then proceeds to

the fill stage where the fill valve regulates inlet water to 1.08 GPM between 20 and 120 psi. A fill hose

is attached to the fill valve and clamped to the bottom of an air gap mounted on the left hand side of

the tub. (The air gap prevents the siphoning of wash water back into the water supply system should

the water pressure drop to less then atmospheric pressure.) The inlet water enters the tub through

the vent opening on the left sidewall of the tub. As the fill continues, both the time of the fill and the

amount of water in the sump are monitored by the electronic control.

The pressure switch assembly mounted to the right side front frame has two pressure switches; a low

water level and a high water level switch. The contact in the low water level switch is open until the

water reaches the proper level in the sump. At this point, the switch closes (neutral to P3-9), starting

the Dynamic Fill.

Dynamic Fill

The closed circuit from the pressure switch starts the wash motor. The wash motor gains speed at the

rate of 100 RPM/second until full speed is attained. The water level inside the sump falls as the wash

motor gains speed. This opens the circuit on the low level pressure switch, allowing the water valve to

introduce more water to the tub. Once the wash motor reaches full speed, the inlet water continues to

fill until the low level pressure switch is reactivated (neutral to P3-9). This completes the fill phase of

the cycle.

PRESSURE SWITCH ASSEMBLY – FIGURE 1

Section 2 - Operation

Low Water Level Switch

High Water Level Switch

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Dacor Dishwasher Service Manual Page 4