Viessmann VITODENS 100-W Installation And Service Instructions Manual page 45

Repairs
(cont.)
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50 70 90 110
Temperature in °C
Checking the temperature limiter
If the burner control unit cannot be reset after a fault shutdown, although the boiler
water temperature is below approx. 95 °C, check the temperature limiter.
2. Compare the sensor resistance with
the curve.
3. Replace the sensor in the case of
severe deviation.
Troubleshooting
45