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.
| Freeze | Harvest | |
| Cycle PSIG | Cycle PSIG | |
|
|
| |
Beginning | __________ | __________ | |
of Cycle | |||
|
| ||
Middle of | __________ | __________ | |
Cycle | |||
|
| ||
End of | __________ | __________ | |
Cycle | |||
|
|
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 through out the freeze cycle.
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