Part Number: 040006847 12/19 61
Analyzing Discharge Pressure
1. Determine the ice machine operating conditions:
• Air temperature entering condenser:
• Ambient temperature:
• Water temperature entering sump trough:
2. Refer to the Cycle Times/24 Hour Ice Production/
Refrigeration Pressure Chart for the ice machine being
checked.
3. Use the operating conditions determined in Step 1 to
find the published (normal) discharge pressures:
• Freeze Cycle:
• Harvest Cycle:
4. Perform an actual discharge pressure check:
Freeze Cycle
PSIG
Harvesting Cycle
PSIG
Beginning of Cycle
End of Cycle
Compare the actual discharge pressure (Step 3) with the
published (nominal) discharge pressure (Step 2).
The discharge pressure is normal when the actual pressure
falls within the published (nominal) 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.
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