10
Drain Function
1.
During the Drain function, a separate drain pump motor is started while the main wash pump
motor continues to operate for 1 minute.
(1)
This accomplishes three goals.
2.
First, the jets on the underside of the lower spray arm continue to flush soils from the accumu-
lator screen while the water is drained from the unit.
(2)
3.
Second, negative pressure in the main wash pump inlet chamber keeps the check valve closed,
allowing the drain pump to remove soiled water from the accumulator.
(3)
4.
Third, the spray arms will rinse down the interior of the wash tub while the water is drained,
leaving the inside free of soils.
(4)
1
2
3
4
2
5
5.
The main wash pump then stops creating positive pressure in the pump’s inlet chamber. This
opens the check valve allowing the remaining water to be drained away.
(5)
