washing loads up to 60 pounds of dry weight. The
equipment used aboard ship, and there are hundreds of
washer-extractor has nine interrelated systems. The
different brands and models of equipment in use. You
washer components are grouped into systems by the
can determine the basic operation of any electrical
major functions performed. These systems are power
galley equipment by using manufacturer's manuals,
distribution, function control, air distribution, water
bulletins, and wiring diagrams usually found on the
distribution, temperature control, drive train, balance,
equipment itself.
supply injection, and drain.
LAUNDRY EQUIPMENT
Power Distribution System
Laundry equipment aboard ship includes washers,
extractors, dryers, dry-cleaning machines, and presses.
The power distribution system is 440-volt ac,
This equipment may be used as separate components or
three-phase, 60-hertz. It is routed to the washer through
in combination (such as a washer-extractor). The
a circuit breaker on the laundry power panel. The
washer-extractor will be the only laundry equipment
440-volt ac provides power to the four motors in the
discussed in this chapter.
washer/drive train. It is reduced through a step-down
transformer to 120-volt ac, single-phase, 60-hertz power
WASHER-EXTRACTOR
for use in the washer control circuitry. The 120-volt ac
power is reduced through another step-down
The washer-extractor is a front-loading,
transformer to 24-volt ac, single-phase, 60-hertz power
self-balancing, general-purpose piece of equipment.
for use in the washer command circuitry.
Figure 5-51 shows a front and rear view of a
CONTROL CIRCUITRY.-- The control circuity
washer-extractor. It is rigidly mounted to the deck in the
energizes the washer and controls operation through the
ship's laundry. The washer-extractor uses ship's
action of switches, relays, motor solenoids, and
electrical power, low-pressure air, saturated steam, and
electrically operated solenoid valves. When the control
fresh water. The washer can perform all cycles of the
circuit receives the proper command signal, the
wash operation in formula (automatic) or manual
following washer functions can occur:
(operator-controlled) mode. The washer is capable of
Figure 5-51.--A typical washer-extractor installation.
5-69