144 Part Number 000014797 Rev02 05/18
ANALYZING SUCTION LINE TEMPERATURE
The suction line temperature gradually drops throughout
the freeze cycle. The actual suction temperature (and drop
rate) changes as the air and water temperature entering
the ice machine changes. These variables also determine
the freeze cycle times. To analyze and identify the proper
suction temperature drop throughout the freeze cycle,
compare the published suction temperature to the
published freeze cycle time.
NOTE: Analyze discharge temperature before analyzing
suction temperature. High or low discharge temperature
may be causing high or low suction temperature.
1. Determine the ice machine operating conditions:
Air temperature entering condenser ______
Air temperature around ice machine ______
Water temperature entering sump trough ______
Use the operating conditions determined in step 1 to find
the published normal suction temperatures.
Freeze Cycle ______
Harvest Cycle ______
2. Perform an actual suction temperature check.
Freeze Cycle
Temperature
Harvest Cycle
Temperature
Beginning of Cycle __________ __________
Middle of Cycle __________ __________
End of Cycle __________ __________
3. Compare the actual suction temperature (Step 3) with
the published suction temperature (Step 2).
The suction temperature is normal when the actual
temperature falls within the published temperature range
for the ice machine’s operating conditions. It is normal for
the suction temperature to be higher at the beginning of
the freeze cycle, then drop through out the freeze cycle.
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