Analyzing Discharge Pressure - Koolaire KY0275W Technician's Handbook

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 Hr. Ice Production and
Refrigerant Pressure Charts" on page 123 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.
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.
Part Number STH047 5/16
______
______
Freeze Cycle
PSIG
__________
__________
__________
______
______
Harvest Cycle
PSIG
__________
__________
__________
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