Viessmann Vitocrossal 200 Series Service Instructions Manual page 51

Boiler water temperature sensors and flue gas temperature sensors
The temperature sensors are of a dual sensor design.
Connection to burner control unit.
3A/3B Boiler water temperature sensors
15A/15B Flue gas temperature sensors
NTC 10 k
Ω
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50
Temperature in °C
Fig. 41
Function description
70 90 110
51