13
Operation
F232087
The 2-speed machines use one 2-speed motor
to drive the cylinder via a V-belt drive in both
speeds. The 3-speed machines use one 1-speed
motor and one 2-speed motor to drive the
cylinder via a V-belt drive in both speeds. The
cylinder is supported via the shaft by two
bearings. The UW35 uses two ball bearings
held in place by a single cast iron housing that
is bolted to the A-frame. The UW60 uses two
flange-mounted, spherical roller bearings
bolted to the A-frame.
The cylinder is constructed with lifters or ribs
that lift the laundry from the bath solution
when the cylinder rotates at slow speed and
then allow the laundry to tumble back into the
bath. This mechanical action accomplishes the
washing function. The cylinder is perforated,
allowing the water to drain from within during
the wash and extract steps.
The spray rinse feature consists of a fiber-
reinforced clear hose connected to the center
of the door glass and to both a hot and cold
water inlet valve. A hemispherically-shaped
spray nozzle inside the door glass produces a
fan-action water spray which disperses rinse
water throughout the load.
The operator can select from among 30 cycles,
12 of which are preprogrammed at the factory.
A special permanent test cycle can be selected
to verify proper operation of the machine.
On the UW60, a balance switch is installed
between the faces of the A-frame to signal the
controls to slow the machine when a severely
out-of-balance load occurs during extract.
Water enters the machine through
electromechanical water valves controlled
by the microcomputer. The microcomputer
also controls the drain and door lock. In
addition, it selects the water levels according
to the programmed cycle. Vacuum breakers
are installed in the water-inlet plumbing to
prevent backflow of water.
The standard production UW35 and UW60
models use a single drain valve. (A dual drain
is available as an option.) The drain valves are
normally open, which means that they close
only when power is applied, thus allowing the
machine to drain in the event of a power
failure.
A door-lock system prevents opening of the
stainless steel door when water is in the
machine. It also prevents operation of the
machine when the door is open. The doorbox
contains the door-lock microswitch, door-
closed magnetic switch, and the door-unlock
solenoid.
The UW35 shaft seal assembly includes two
lip seals integrated into the cast-iron bearing
housing. Each seal has two lips which make
contact with a stainless steel bushing mounted
to the shaft.
The UW60 shaft seal assembly includes a
brass collar held in place on the cylinder shaft
with set screws. The collar has a flange with a
ceramic ring which makes contact with a
spring-loaded phenolic face seal enclosed in a
nylon housing mounted on the rear of the shell.
The collar contains two internal O rings which
maintain contact with the cylinder shaft.
The polypropylene supply dispenser is
mounted on the right side of the washer-
extractor, viewed from the front. The dispenser
has 5 supply compartments, numbered 1–5,
starting from the rear of the machine. The
compartments hold plastic supply cups that are
used for either liquid or dry supplies. A nozzle
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