Specifications

TM024 Premier Loline Solar Drain back Service Instructions REV: A
D.O.I: 12/12/2007
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
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Testing the Sensor Strip
Unplug the sensor strip plug from the control board and using a multimeter on the kilo-
ohms scale, measure between the pins of the sensor strip plug*. There are six individual
tests to be performed as there are six individual sensors contained along the length of the
sensor strip (sensors S0 – S5). 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 ‘Sensor Strip Temperature/Resistance Table’ shown below. For this reason it
is best to empty the tank of hot water and then measure the cold water temperature at the
T&PR so a known temperature datum can then be applied to all sensors which should
then in turn all have a similar resistance value when tested.
Sensor Test Points
S0 – Between Pins 1 and 9
S1 – Between Pins 2 and 9
S2 – Between Pins 4 and 9
S3 – Between Pins 6 and 9
S4 – Between Pins 3 and 8
S5 – Between Pins 3 and 10
*Note: The sensor strip plug 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.
Sensor Strip Temperature / Resistance Table
T (°C) R (kΩ) T (°C) R (kΩ) T (°C) R (kΩ) T (°C) R (kΩ) T (°C) R (kΩ)
-10 37.45 10 15.45 30 7.037 50 3.485 70 1.853
-9 35.73 11 14.82 31 6.782 51 3.371 71 1.799
-8 34.11 12 14.22 32 6.537 52 3.262 72 1.743
-7 32.56 13 13.65 33 6.302 53 3.157 73 1.695
-6 31.10 14 13.10 34 6.076 54 3.055 74 1.646
-5 29.71 15 12.58 35 5.86 55 2.957 75 1.589
-4 28.39 16 12.09 36 5.653 56 2.863 76 1.552
-3 27.13 17 11.61 37 5.454 57 2.773 77 1.508
-2 25.94 18 11.16 38 5.264 58 2.686 78 1.465
-1 24.81 19 10.72 39 5.081 59 2.602 79 1.424
0 23.73 20 10.31 40 4.905 60 2.521 80 1.384
1 22.71 21 9.913 41 4.736 61 2.442 81 1.345
2 21.73 22 9.535 42 4.574 62 2.367 82 1.307
3 20.81 23 9.173 43 4.418 63 2.295 83 1.271
4 19.92 24 8.826 44 4.269 64 2.225 84 1.236
5 19.09 25 8.495 45 4.125 65 2.157 85 1.202
6 18.29 26 8.177 46 3.987 66 2.092 86 1.169
7 17.52 27 7.873 47 3.854 67 2.029 87 1.137
8 16.80 28 7.583 48 3.726 68 1.968 88 1.107
9 16.11 29 7.304 49 3.603 69 1.91 89 1.077
Sensor strip plug
pin configuration
Testing the
sensor strip