Specifications

TM024 Premier Loline Solar Drain back Service Instructions REV: A
D.O.I: 12/12/2007
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Testing the Hot and Cold Sensors
Unplug the relevant sensor from the control board and remove the sensor from its location
so its temperature will be the same as the ambient air temperature. Using a multimeter on
the kilo-ohms scale, measure between the two pins of the sensor plug*. As the resistance
of each sensor will change according to its temperature, the resistance measurements for
each sensor will need to be checked against the ‘Hot & Cold Temperature/Resistance
Table’ shown below and the value then compared to the ambient air temperature.
*Note: The sensor strip plug socket test points are quite small, Fine Probe Adapters (part
number WH0020082) can be utilised as probe extensions. Alternatively small pins may be
used however ensure good contact is made when testing.
Hot & Cold Sensor Temperature / Resistance Table
The table below sets out the resistance for the hot or cold sensor for a given water or air
temperature.
Temperature
Degrees C
Resistance (Hot or Cold Sensor)
Kilo-ohms
0 23.73
10 15.45
20 10.31
30 7.037
40 4.905
50 3.485
60 2.521
70 1.853
80 1.384