Theory Of Operation - Alliance Laundry Systems SF135PV Manual De Instrucciones

Operation

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 computer, the fuse/relay board
together with its interface board, water level switches,
a circuit breaker which interrupts control voltage, 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
computer to the correct signals for the AC inverter
drive. In addition, all logic inputs to the computer are
routed through this board.
Two separate bearings support the cylinder on
135-pound and 250-pound models.
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.
On 135-pound capacity models, water enters the
machine through electromechanical water valves. On
250-pound capacity models, water enters the machine
through pneumatic water valves on the rear of the
machine. (Pneumatic water valves are an option on
135-pound capacity models.)
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Water valves on both washer-extractors are 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.
Air-operated 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 air 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 stainless steel supply dispenser is located on the
left side panel of the washer-extractor, viewed from
the front. The dispenser has five supply compartments,
numbered 1 – 5, starting from the rear of the machine.
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. On 135-pound capacity models, five hose
barbs on the rear of the washer-extractor facilitate
connection to an external supply system. On
250-pound capacity models, five strain reliefs on top
of the supply dispenser provide the same connection
capability.
F232101