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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
Harvest
Cycle psig
Beginning of
Cycle __________ __________
Middle of
Cycle __________ __________
End of
Cycle __________ __________
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