Cycle Times/24-Hour Ice Production/ Refrigerant; Pressure Charts - Manitowoc indigo series Technician's Handbook

Cycle Times/24-Hour Ice Production/
Refrigerant Pressure Charts
These charts are used as guidelines to verify correct ice
machine operation.
Accurate collection of data is essential to obtain the
correct diagnosis.
• Production and cycle times are for dice cube - Half
dice cube cycle times can be 2 - 3 minutes faster,
depending on model and ambient temperature.
Models ending in 6 (ie: ID0606A) are included in the
model series cycle times & pressures.
• Regular cube production derate is 7%.
• Ice production checks that are within 10% of the
chart are considered normal. This is due to variances
in water and air temperature. Actual temperatures
will seldom match the chart exactly.
• Refer to "Symptom #2 - Operational Analysis Table"
page 125 for the list of data that must be collected for
refrigeration diagnostics.
• Zero out manifold gauge set before obtaining
pressure readings to avoid misdiagnosis.
• Discharge and suction pressure are highest at the
beginning of the cycle. Suction pressure will drop
throughout the cycle. Verify the pressures are within
the range indicated.
• Record beginning of freeze cycle suction pressure
one minute after water pump energizes.
• 50Hz dice and half dice production derate is 12%.
• 50Hz regular cube total production derate is 14%.
Part Number STH025 11/16
Charts
225