Viessmann VITODENS 050-W Installation And Service Instructions Manual page 68

Troubleshooting
Repairs
(cont.)
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30
Temperature in °C
Sensor type: NTC 10 kΩ
Replacing the flow limiter
B
C
68
50 70 90
A
110
3. In the event of severe deviation
replace the sensor.
1. Drain the boiler on the DHW side.
2. Pull off spring clip A.
3. Remove flow sensor B.
4. Remove faulty flow limiter C.
5. Check fitted strainer for dirt/contam-
ination. Clean strainer if required.