Koolaire KD0172A, Technician'S Handbook

Page: 82 / 132

82 Part Number STH047 5/16
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 150°F
(66°C) on a normally operating ice machine.
PROCEDURE
Connect a temperature probe on the compressor
discharge line within 6" (15.2 cm) of the compressor.
Observe the discharge line temperature for the last three
minutes of the freeze cycle and record the maximum
discharge line temperature.