Harvest Sequence - Manitowoc Indigo Series Technician's Handbook

HARVEST SEQUENCE

5. Water Purge
The air pump(s) and the harvest valve(s) open at the
beginning of the water purge to divert refrigerant gas
into the evaporator.
The water pump continues to run, and the water dump
valve energizes to purge the water in the water trough.
ICVD Condensing Unit:
When the refrigerant pressure is low enough to open the
fan cycling pressure control the condenser fan motor
stops.
6. Harvest
The air pump(s) remain energized and the harvest
valve(s) remains open. The refrigerant gas warms the
evaporator causing the cubes to begin melting and slide,
as a sheet, off the evaporator and into the storage bin.
Single evaporator models - The sliding sheet of cubes
opens the water curtain/ice damper and bin switch.
The momentary opening and re-closing of the bin switch
will terminate the harvest sequence and return to the
freeze sequence (Step 3 - 4.)
Twin evaporator models - The sliding sheet of cubes
opens the ice damper and bin switch. The momentary
opening and re-closing of the bin switch de-energizes
the harvest valve for that evaporator. When the bin switch
has opened and closed the ice machine will terminate the
harvest sequence and return to the freeze sequence (Step
3 - 4.)
Part Number STH026 6/15 105