Manitowoc

ANALYZING DISCHARGE PRESSURE1. 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 andRefrigerant Pressure Charts” on page 203 for icemachine being checked.Use the operating conditions determined in step 1 tofind the published normal discharge pressures.Freeze Cycle ______Harvest Cycle______3. Perform an actual discharge pressure check.FreezeCycle PSIGHarvestCycle PSIGBeginning ofCycle __________ __________Middle ofCycle __________ __________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 actualpressure falls within the published pressure range forthe ice machine’s operating conditions. It is normal forthe discharge pressure to be higher at the beginning ofthe freeze cycle (when load is greatest), then dropthroughout the freeze cycle.Part Number 80-01111-9 7/10 149