2 Unit installation
DX-Interface
SMGB0099 rev.0 - 12/2016
77
2
2.12.4 Thermistor installation
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
PCB socket /
Thermistor connector colour
PCB socket number
Thermistor length (mm)
Liquid pipe thermistor
Black
THM 3
650
Gas pipe thermistor
Yellow
THM 5
600
!
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.
?
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.
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)
!
C A U T I O N
The thermistor must be installed properly in order to avoid water onto the thermistor.
1
2
3
4
Typical installation location
A Liquid pipe thermistor
Must be installed in the coldest liquid line
point in the heat exchanger (prior the
distributor).
B Gas pipe thermistor
Must be installed as close as possible to
the heat exchanger refrigerant outlet.
