Service manual

Water System Ice Making Sequence of Operation Section 5
5-2
Part No. 80-1206-3
HARVEST CYCLE
4. The water pump and water dump solenoid are
energized for 45 seconds to purge the water from
the water trough. The water fill valve energizes for
the last 15 seconds of the 45-second purge cycle, to
flush sediment from the bottom of the water trough.
5. After the 45-second purge, the water pump and
water dump valve de-energize.
NOTE: The control board has an adjustable water purge
in the harvest cycle. This permits a 15, 30 or 45 second
purge cycle. Adjusting the purge time to less than 45
seconds eliminates the 15 second flush time.
QDUALC Only
Water Assist Harvest Feature
Typical duration of a harvest sequence is less than 2.5
minutes when the harvest sequence time reaches 4
minutes the following occurs:
• 4 Minutes into a Harvest Sequence:
The water fill valve will energize to fill the trough with
water.
• 5 Minutes into a Harvest Sequence:
The water pump will energize and water will flow over
the evaporators. The water fill valve and water pump
remain on until all bin switches have been activated.
• 7 Minutes into a Harvest Sequence:
The maximum harvest time is 7 minutes at which
point the control board check bin switch position.
Both bin switches closed - The ice machine starts a
Prechill cycle.
One or both bin switches open - The ice machine
starts and Automatic Shut-off sequence.
AUTOMATIC SHUT-OFF
There is no water flow during an automatic shut-off.
Water Flow Down the Drain
SV1677
TO DRAIN
WATER DUMP VALVE
TO DISTRIBUTION TUBE
WATER PUMP
WATER INLET VALVE