139
Checking the flue gas temperature sensor
The flue gas temperature sensor locks
out the boiler when the permissible flue
gas temperature is exceeded. Reset the
interlock after the flue system has cooled
down by pressing reset button
R
.
A
1.
Pull leads from flue gas temperature
sensor
A
.
10
1
10 30 50 70 90 110
Temperature in °C
0.4
0.6
0.8
2
4
6
8
20
Resistance in k
Ω
Sensor type: NTC 10 kΩ
2.
Check the sensor resistance and
compare it with the curve.
3.
Replace the sensor in the case of
severe deviation.
Troubleshooting
Maintenance
(cont.)
5585 174 GB
Service