Manitowoc J-1300, Руководство по обслуживанию

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Section 4 Ice Machine Sequence of Operation
4-4
HARVEST SEQUENCE
5. Water Purge
The water pump continues to run and the water dump
valve energizes for 45 seconds, to purge the water in
the sump trough. After the 45 second water purge, the
water pump and dump valve de-energize. The hot gas
valve(s) and HPR solenoid valve also open at the
beginning of the water purge.
New style circuit boards have an adjustable water
purge in the harvest cycle. This permits a 0 (off), 15,
30 or 45 second purge cycle.
6. Harvest
The HPR valve and the hot gas valve(s) remain open
and the refrigerant gas warms the evaporator causing
the cubes to slide, as a sheet, off the evaporator and
into the storage bin. The sliding sheet of cubes
swings the water curtain out, opening the bin switch.
The momentary opening and re-closing of the bin
switch terminates the harvest sequence and returns
the ice machine to the freeze sequence (Step 3 - 4.)
Harvest Sequence (Typical J450 Shown)
AUTOMATIC SHUT-OFF
7. Automatic Shut-Off
When the storage bin is full at the end of a harvest
sequence, the sheet of cubes fails to clear the water
curtain and will hold it open. After the water curtain
is held open for 7 seconds, the ice machine shuts off.
The ice machine remains off for 3 minutes before it
can automatically restart.
The ice machine remains off until enough ice has
been removed from the storage bin to allow the ice to
drop clear of the water curtain. As the water curtain
swings back to the operating position, the bin switch
re-closes and the ice machine restarts (steps 1 - 2)
provided the 3 minute delay period is complete.
Automatic Shut-Off (Typical J450 Shown)