IRT1900A251E User Manual

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114 Part Number: 000015430 Rev 02 5/20

Analyzing Discharge Pressure in the Freeze Cycle

1. Determine the ice machine operating conditions:

Air temp. entering condenser ______ °

Water temp. entering sump trough ______ °

2. Refer to Operating Pressure table (starting on page

201) for 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 (kPa)

1 Minute into the

Freeze Cycle __________

Middle of Freeze Cycle __________

End of Freeze Cycle __________

5. 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 throughout the Freeze cycle.

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Manitowoc IRT1900A251E IRT1900A-251E 48" Indigo NXT Series Air Cooled Modular Ice Machine with 1700 lbs. Daily Ice Production, easyTouch Display, Acoustical Ice Sensing Probe and Active Sen