User Guide
9
Mounting a sensor into the condenser
vs. mounting it on the liquid line
When a sensor is mounted into the
condenser, the control responds
more rapidly to changes in head
pressure than when it is mounted on
the liquid line. This is especially true
for high efficiency condensers.
When the sensor is mounted on the
liquid line, the control responds more
slowly and the results can be a fan
that cycles on and off.
Whenever possible, it is preferable to
mount the sensor in the upper 1/3 of
the condenser instead of mounting
it on the liquid line (see illustration
below).
Temperature vs. Probe Resistance
°C °F Resistance (KΩ)
0° 32° 32.7
5° 41° 25.4
10° 50° 19.9
15° 59° 15.7
20° 68° 12.5
25° 77° 10.0
30° 86° 8.1
35° 95° 6.5
40° 104° 5.3
45° 113° 4.4
50° 122° 3.6
Appendix A Appendix B
ICM325HN Typical Installation
Condenser
Sensor
Sensor
Sensor
ICM325HN
can monitor
two additional
condensers
Motor
1
Motor
2
Reversing Valve
for Heat Pump
T-Stat
Control
Transformer
Line 2
Line Voltage
Terminal to
be used for
480 VAC
Line 1