96
HOT GAS VALVE
General
The hot gas valve is an electrically operated valve that
opens when energized, and closes when de-energized.
Normal Operation
The valve is de-energized (closed) during the freeze cycle
and energized (open) during the harvest cycle. The valve
is positioned between the comprerssor and the
evaporator and performs two functions:
1. Prevents refrigerant from entering the evaporator
during the freeze cycle.
The hot gas valve is not used during the freeze cycle.
The hot gas valve is de-energized (closed) preventing
refrigerant flow from the compressor into the
evaporator.
2. Allows refrigerant vapor to enter the evaporator in
the harvest cycle.
During the harvest cycle, the hot gas valve is
energized (open) allowing refrigerant gas from the
discharge line of the compressor to flow into the
evaporator. The heat is absorbed by the evaporator
and allows the release of the ice slab.
Exact temperatures vary according to ambient temperature
and ice machine model.
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