Manitowoc Marine Q 1000, Service Technician'S Handbook

Page: 106 / 179

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Discharge Line Temperature Analysis
GENERAL
Knowing if the discharge line temperature is
increasing, decreasing or remaining constant can be
an important diagnostic tool. Maximum compressor
discharge line temperature on a normally operating ice
machine steadily increases throughout the freeze
cycle. Comparing the temperatures over several
cycles will result in a consistent maximum discharge
line temperature.
Ambient air temperatures affect the maximum
discharge line temperature.
Higher ambient air temperatures at the condenser =
higher discharge line temperatures at the compressor.
Lower ambient air temperatures at the condenser =
lower discharge line temperatures at the compressor.
Regardless of ambient temperature, the freeze cycle
discharge line temperature will be higher than 160°F
(71.1°C) on a normally operating ice machine.
PROCEDURE
Connect a temperature probe on the compressor
discharge line with-in 6" (15.24 cm) of the compressor
and insulate.
Observe the discharge line temperature for the last
three minutes of the freeze cycle and record the
maximum discharge line temperature.