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F238000
Section 2 Introduction
How Your Washer-Extractor Works
The design of the machine emphasizes performance reliability and long service life.
In washer-extractor sizes up through the 50-pound models, the cylinder is supported with two sealed
bearings mounted in a machined cast iron trunnion. Bearing housings are bolted to a heavy gamma frame
for all models.
The 2-speed machines use one dual-speed motor to drive the cylinder using a V-belt drive in wash and
extract speeds.
The 3-speed 18-pound models use one triple-speed motor to drive the cylinder at wash, medium extract
and high extract speeds. The 3-speed 35-pound and 50-pound models use one single-speed and one dual-
speed motor to drive the cylinder at wash, medium extract and high extract speeds.
Variable speed washer-extractors use one motor to drive the cylinder. In all models, the motor is driven
using a flat belt drive.
A door-lock system prevents opening of the stainless steel door when a cycle is in progress. It also
prevents operation of the machine when the door is open.
An electrically operated drain valve is used to retain the water and wash solution in the machine during
the wash and rinse steps. The drain valve closes when power is applied and opens when power is
removed, allowing the machine to drain in the event of a power failure.
The cylinder is designed with lifters or ribs that lift the garments from the wash solution when the
cylinder rotates at slow speed and allow the garments to tumble back into the solution. The cylinder is
perforated, allowing the water to pass through and drain from within during the wash and extract cycles.
Electrical controls for the machine are housed in a separate enclosure located underneath the top cover of
the machine.
The polypropylene supply dispenser is located under a flexible cover on the left side of the machine,
viewed from the front. The compartments are numbered 1–3, starting from the left side of the machine. A
nozzle flushes dry supplies from the compartment with water at the appropriate time in the cycle.
Liquid supplies can be injected directly into the dispenser compartments by a customer-supplied external
chemical supply system. Hose barbs on the rear of the machine facilitate connection to an external
chemical supply system. A terminal strip in the input power junction box provides control signals.
