Operation
MODEL EST Front Loader INSTALLATION & OPERATION MANUAL Rev. Draft
Page
8
2.
Cam switch 8 controls the pump motor. The pump motor comes ON at the beginning
of the operational cycle and continues to run until the end of the drain function
(controlled by cam switch 3), at which time it turns off for about eight seconds
allowing time for the machine to refill enough to avoid running the pump dry before
the pump motor restarts and runs to the completion of the operational cycle.
The pump motor runs the pump for the 45-second wash cycle, then pumps the water
out through the drain, turns off for about 8 seconds (allowing the machine to refill
with clean rinse water) and then runs the pump for the 30-second rinse cycle.
3.
Cam switch 3 controls the drain function. At the end of the 45-second wash cycle,
cam switch 3 energizes the drain solenoid allowing the wash water out of the
machine. Cam switch 3 also increments the rack counter by one each cycle.
4.
Cam switch 4 controls the water solenoid valve on the water supply to flush and fill
the machine. At the end of the wash cycle the drain solenoid valve is open and drain
begins, the pump motor continues to run. About the middle of the drain cycle, Cam 4
opens the fill solenoid valve and the flush function begins flushing residual detergent.
At the end of drain cycle, drain solenoid valve closes and the pump motor is
stopped— the machine begins to fill for the rinse cycle. Once the machine has
refilled sufficiently, the pump motor restarts carrying out the rinse portion of the
cycle as the filling of the wash tank completes. This can be adjusted as necessary for
water pressure situation.
5.
Cam switch 5 controls the detergent pump and turns ON about 5 seconds after the
operational cycle is started and runs for a few seconds to provide sufficient detergent
for the wash cycle. This cam can be adjusted as necessary for proper detergent
dosage.
6.
Cam switches 6 and 7 control the sanitizer and rinse pumps respectively. They turn
ON at the beginning of the rinse cycle and run for a few seconds to provide sufficient
sanitizer and rinse aid for the rinse cycle. These cams can be adjusted as necessary
for proper chemical dosage.
7.
At the end of the cycle cam switches 1 and 2 open (de-energize) stopping the cycle.
The Start/Stop relay is held energized by its normally open contact until the doors are
opened. Opening the doors de-energizes the Start/Stop Relay, which will then cause
a new cycle to start when the doors are once again closed.
Note:
Press and holding the START switch on for a couple of seconds will start a cycle.
The Water and Chemicals to the dishmachine must be programmed by a qualified
chemical specialist. Contact your local Chemical Supplier or Equipment Dealer for
assistance.
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