156 Part Number 80-1505-3 6/11
Analyzing Discharge Pressure
1. Determine the ice machine operating conditions:
Air temp. entering condenser______
Air temp. around ice machine______
Water temp. entering sump trough______
2. Refer to Cycle Times/24-Hour Ice Production/
Refrigeration Pressure Chart for ice machine
being checked.
Use the operating conditions determined in step 1
to find the published normal discharge pressures.
Freeze Cycle______
Harvest Cycle______
3. Perform an actual discharge pressure check.
4. Compare the actual discharge pressure (step 3)
with the published discharge pressure (step 2).
The discharge pressure is normal when the actual
pressure falls within the published pressure range
for the ice machine’s operating conditions. It is
normal for the discharge pressure to be higher at
the beginning of the Freeze cycle (when load is
greatest), then drop throughout the Freeze cycle.
Freeze
Cycle psig
1 Minute into
Freeze Cycle
__________
Middle of Freeze Cycle __________
End of Freeze Cycle __________
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