Theory of Operation
Starting the Machine
The door lock will not allow a cycle to be started until the door
has been closed.
Fill
The operator selects a cycle and starts the machine. Water enters
the machine through water valves that are controlled by the mi-
crocomputer. As water fills the basket, a column of air is trapped
in a pressure bulb and hose. The air pressure continues to in-
crease as the basket fills with water. When the desired water level
is reached, the water level sensor triggers the microcomputer and
the water valves turn off.
A vacuum breaker installed in the inlet plumbing prevents the
backflow of water.
Supply
The operator can either connect external liquid supplies to the
machine or fill the supply dispenser with liquid or dry supplies.
The supply dispenser's nozzles flush the compartments with wa-
ter at the appropriate times throughout a cycle.
Wash
The basket includes ribs that lift the laundry from the wash water.
The laundry then tumbles back into the bath.
In variable-speed models, 1 dual-speed motor drives the basket's
shaft with a V-belt.
20-60 pound capacity models use 2 bearings that are held in place
by a single cast-iron trunnion that is bolted to the frame. 80 and
100 pound capacity models use a 2 flange-type bearing that is
bolted to the frame.
Drain
Washer-extractors use a normally open gravity-type drain system.
When the drain valve opens, the perforated basket allows water
to drain from it.
In the event of a power failure, the drain valve will open automat-
ically and the machine will drain.
20-40 pound capacity models have an alternative pump drain op-
tion.
Extract
A final high-speed extract step removes water from the load,
which maximizes drying efficiency.
The door lock system will not allow the door to be opened until
the cycle has finished.
Theory of Operation
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