Operation
Theory of Operation
The standard production UW35PV and
UW60PV use a single drain valve. (Dual
drains are available as an option.) The
UW80PV, UW100PV and UW125PV use dual
drain valves. The dual drains open and close
together under control of the WE-6 computer.
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 door-lock microswitch, door-
closed magnetic switch, and the door-unlock
solenoid.
The shaft seal assembly includes a brass collar
held in place on the cylinder shaft with
setscrews. The collar has a flange with a
ceramic ring which makes contact with a
spring-loaded phenolic face seal enclosed in a
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 five 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
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 strain
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© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
reliefs on top of the supply dispenser facilitate
connection to an external supply system. A
terminal strip inside a compartment attached to
the left side of the control module, viewed
from the rear of the washer-extractor, provides
connection points for external supply signals.
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
in emergency situations. Turn button to the
right and pull out to reset.
WE-6 Microcomputer
The WE-6 microcomputer control is a field-
programmable solid-state control capable of
storing and running up to 39 preprogrammed
ready-to-use cycles. A detailed description of
these cycles can be found in the Programming
section of this manual under Individual Cycle
Charts.
Never turn the power off while the computer
mode switch is in the PROGRAM position.
Such action will disorder portions
of the programmed data, necessitating
reprogramming of some or all of the existing
cycles. Always return the mode switch to RUN
position before turning the power off.
Never leave the mode switch key inserted in
the switch lock where it may be accessible to
unauthorized personnel not familiar with
programming procedures.
The computer control in this washer-extractor
is continuously on the alert for problems
within the machine. When the computer
detects a problem, it immediately flashes a
letter or number or both on the display. It may
activate the signal buzzer as well.
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