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|  MIL-W-43001F
3.5.1.2 Motor control circuit. Each motor shall have a controller of the
magnetic across-the-line type having a separate pole for each ungrounded
conductor. In addition, timers, limit switches (except for 25- and 50-pound
machines), remote control pushbutton switches, signals, and indicating lights
shall be provided as necessary to perform the intended functions. The machine
shall be equipped with a safety switch which shall prevent the machine from
being operated in the wash or extraction cycles when the cylinder is being
inched or positioned. These requirements shall be verified when the equipment
is tested as specified in 4.6.1. The washer-extractor shall be equipped with
inching or position control switches (except for one-compartment machines) and
start and emergency stop switches of a design to prevent accidental operation.
3.5.1.3 Cylinder reversing. Motors used to perform the washing cycle shall
have an electric motor-driven timing pilot control system to regulate the number
of revolutions of the cylinder between reversals in such a manner that the
number of revolutions in one direction will not vary more than 5 percent from
those in the opposite direction. The wash motor shall reverse not less than two
times per minute. The dwell between reversals shall be adjustable to provide
maximum running time and allow the motor to come to a complete stop before
reversing. These requirements shall be verified when the equipment is tested as
specidied in 4.6.1.
3.5.1.4 Automatic cycle controls. Each washer-extractor shall be equipped
with automatic cycle controls, including a supply injection system (see
3.5.1.5), designed to cause the machine to perform any or all of the following
operations in the washing and extracting cycle:
(a)
timing while the washer-extractor is filling with water to the water level
called for by the automatic cycle control. The timing of each operation shall
be infinitely adjustable. The total washing and extracting cycle time, exclu-
sive of filling time, shall be infinitely adjustable up to a total of not less
than 75 minutes.
When specified (see
(b) Provide automatic operation of drain valve.
6.2), provide a water reuse valve.
(c) Provide automatic operation of hot and cold water inlet valves and to
provide for all hot, all cold, or both hot and cold water valves fully opened as
called for by the automatic cycle control.
(d) Control admission of water to the washer-extractor for at least three
water levels. The water levels must be readily adjustable in the field within
the normal range of water levels generally employed in commercial washing.
(e) Provide continuous automatic adjustment of the water level to
compensate for water absorption by the load or reduction in water level for any
other reason.
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