Alliance Laundry Systems UF35PV - Manual (Page 14)

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Operation
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Theory of Operation
The design of the washer-extractor emphasizes
performance reliability and long service life. The
cylinder, shell, and main body panels are fabricated of
stainless steel.
Electrical controls for the washer-extractor are housed
in separate enclosures. The front control module
houses the WE-6 microcomputer, the fuse/relay board
together with its interface board, water level switches,
a motor thermal overload reset switch, and other
control components. The rear control module houses
the AC inverter drive and its components.
All variable-speed freestanding machines use the AC
inverter drive control, which provides programmable
motor speeds using a single motor. The AC drive
interface board converts motor logic from the WE-6
microcomputer to the correct signals for the AC
inverter drive. In addition, all logic inputs to the
computer are routed through this board.
The cylinder is supported by roller bearings housed
inside a trunnion.
The cylinder is constructed with four 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.
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.
Motorized drain valves hold water in the machine
during the wash, soak, and rinse steps. The drain valve
is normally open, which means that it closes 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 a cycle is in progress. It also prevents
operation of the washer-extractor when the door is
open.
The doorbox contains the Hall-effect door-locked and
door-closed sensors and the door-unlock solenoid.
The supply dispenser is located on the left side of the
front of the washer-extractor. The dispenser has five
supply compartments, numbered 1 to 5 from left to
right. The compartments hold supply cups that are
used for either liquid or dry supplies. A nozzle flushes
supplies from the cups with water for the time
programmed in the cycle.
Liquid supplies can be injected directly into the cups
by a customer-supplied external chemical supply
system. Five hose barbs on the rear of the washer-
extractor facilitate connection to an external supply
system.
Emergency Stop Button
A red emergency stop button is located on the upper
right-hand corner of the control panel. Push the button
in to stop the washer-extractor. Turn button to the left
and pull out to reset.
Wet Clean Features
The washer-extractor is equipped with the following
wet clean capable features: One-half wash speed
allows gentle mechanical action during wash. Eight
supply signals provide not only normal laundering
signals to dispense detergents, bleaches, softeners,
sours, etc., but also chemicals unique to wet clean
processing.