icetro IM Series, Installation & Service Manual

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IM-Series
Design & Function
1. With water curtain closed, the dump valve and water valve are energized for 15 seconds. With brackish water emptied
from the sump trough, the water pump and dump valve are de-energized.
2. After 15 seconds the dump valve is de-energized, but the water valve is energized until the water level reaches high level sensor,
plus and additional 15 seconds (adjustable). The fan motor is energized after 5 seconds with the water curtain closed.
3. When water contacts the ice thickness sensor for 7 continuous seconds, the machine enters the defrost cycle (Harvest).
4. The hot gas valve is energized for approximately 50 seconds. At this time, the water pump and water supply valve are de-
energized.
5. The compressor and hot gas valve continue to defrost evaporator until ice falls from evaporator plate.
6. Ice falling from evaporator causes the water curtain open & close signaling defrost termination.
7. With the Curtain closed, the machine begins another cycle.
NORMAL CONTINUOUS SEQUENCE OF OPERATION DURING ICE MAKING MODE IM SERIES
When the machine shuts down due to full bin level, with the ‘ Full Lamp’
lit, removal of ice from the bin will cause the curtain to close, which
closes the curtain switch and energizes the machine with the same
steps outlined in the ‘ INITIAL START-UP'.
Normal continuous operation starts a new cycle with steps 1 through 7.