Raytheon Commercial Laundry UW50PV Instalación Y Mantenimiento página 14

Installation
Machine Overview (
The operator can select from among
39 preprogrammed cycles. Cycle 01 is a test
cycle used to verify proper operation of the
washer-extractor. With the exception of Cycle
39, the remaining cycles are complete wash
cycles or specialty cycles designed to handle
various fabrics at specific water temperatures
and lev els. Cycle 39 is designed to test an
external chemical injection supply system.
Programmable custom cycles are another
feature of the WE-6 computer.
A balance switch installed between the faces
of the A-frame signals the computer to slow
the washer-extractor when an out-of-balance
load occurs during extract.
Water enters the washer-extractor through
electromechanical water valves controlled by
the microcomputer. The microcomputer also
controls the drain and the 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 UW50PV model uses
a single drain valve. The UW65PV and
UW85PV use two drain valves. (Dual drains
are available as an option on the UW50PV. 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.
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Continued
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. For models
with a single doorbox, 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
nylon housing mounted on the rear of the shell.
The collar contains two internal O rings which
maintain contact with the cylinder shaft.
The supply dispenser is mounted on the right
side of the washer-extractor, viewed from the
front and is made of polypropylene.
The UWPV model dispenser has five supply
compartments. The UW50, UW65, and UW85
supply compartments are 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 the 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
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.
A red emergency stop button is located on the
upper right-hand corner of the control panel.
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