Thermistor Installation - Hitachi RCI-1.0FSN4 Service Manual

2 Unit installation
DX-Interface

2.12.4 Thermistor installation

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Liquid and gas pipes thermistor
Two type thermistors are supplied inside the control box. The purpose and identification of each one is as follow:
Item
Liquid pipe thermistor
Gas pipe thermistor
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C A U T I O N
In case that the thermistors supplied with the Dx-Interface are not long enough, please make sure that the length extension is properly
done avoiding the sensing distortion and that the joint is properly insulated to avoid any electrical failure.
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N O T E
When fitting the thermistors, remember that they must be secured correctly by the special clamp, ensuring the perfect contact between
the pipe and thermistor. Cover it completely with insulation, like cork tape or pipe insulation, depending on the location. Replace them if
damaged during maintenance work.
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Thermistor installation example
1 Liquid / gas pipe thermistor (factory supplied)
2 Thermistor holder (field supplied)
3 Thermistor lead wire (field supplied)
4 Insulation (field supplied)
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C A U T I O N
The thermistor must be installed properly in order to avoid water onto the thermistor.
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Typical installation location
A Liquid pipe thermistor
B Gas pipe thermistor
77 SMGB0099 rev.0 - 12/2016
PCB socket /
Thermistor connector colour
Black
Yellow
Must be installed in the coldest liquid line
point in the heat exchanger (prior the
distributor).
Must be installed as close as possible to
the heat exchanger refrigerant outlet.
PCB socket number Thermistor length (mm)
THM 3
THM 5
650
600
2
1
2
3
4