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F232072 13
Operation
Theory of Operation
The design of the machine emphasizes performance
reliability and long service life. The cylinder, shell,
and main body panels are fabricated of stainless
steel.
The machine uses one motor to drive the cylinder
via a V-belt drive in all speeds.
A door-lock system prevents opening of the
stainless steel door when water is in the machine. 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 fill 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
process and extract.
Electrical controls for the machine are housed in a
separate enclosure located underneath the top cover
of the machine.
The machine uses an AC inverter drive control
which provides six motor speeds using a single
motor. The solid state output board converts motor
logic from the V-computer to the correct signals for
the AC inverter drive.
The AC inverter drive uses special balance detection
software in conjunction with the V-computer to
prevent out-of-balance conditions. When the AC
drive detects an unbalanced load at the end of a
drain step, the computer will make up to seven
attempts to balance the load. As a fail-safe measure,
an overtravel limit switch is installed between the
frame and the sump, stopping the AC drive when
tripped.
The operator can select from among 30 cycles, 16
of which are preprogrammed at the factory. On
export models, 10 cycles are preprogrammed at the
factory. A special permanent test cycle can be
selected to verify proper operation of the machine.
Electronic sensing of load balancing is utilized to
attempt to optimize load balance prior to extract.
The machine is equipped with five hose barbs on
the rear of the machine to facilitate connection to an
external chemical supply system. A terminal strip in
the input power junction box provides control
signals for an external chemical supply system.
V-Computer
The V-computer control is a programmable solid-
state control capable of storing and running up to 30
cycles. A detailed description of these cycles can be
found in the Programming section of this manual
under V-Computer Standard OPL Cycles and
V-Computer Export OPL Cycles.
If this machine’s computer has been equipped with
special preprogrammed cycles, a separate insert
listing these cycles has been included in the
resealable plastic bag which contained this manual.