Kenmore 808353 - Manual (Page 32)

A Main Motor and Relay
Most of The dishwashers use 3450 RPM, 120V 60 Hz reversible type motor to drive the pump impellers
jhese motors utilize an external start relay and have two start or phase windings, a main or run winding and a
built-in overload protector
Direction of rotation of the armature or rotor is determined by the start winding selected through the timer
switch contacts See Figure 28
FIGURE 28 -
The relay is normally open with its coil connected in series with the main winding of the motor, and^ its switch con­
tacts connected in series with the motor start winding (Since the relay is a gravity type device, it must be
mounted in an upright position ) See Figure 29.
BOTTOM OF RELAY
r ! P li D r 00
rlbUKh Zy
When voltage is applied to the motor, as during the wash, rinse and drain periods of the dishwashing cycle the
momentary hioh current to the main winding energizes the relay solenoid The solenoid plunger is lifted, dosing
the switch contacts The start winding is energized through the timer and relay contacts and the motor arrnature
begins to rotate. As the motor approaches normal rurtning speed, the currerit in the rnain winding and m the
solenoid diminishes. When the current through the start relay drops below arnps the we^
overcomes the weakening magnetic force of the solenoid coil and drops out, disconnecting the motor start
winding
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