Checking The Outlet Temperature Sensor - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Maintenance
(cont.)

Checking the outlet temperature sensor

A
Fig. 58
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50 70 90 110
Temperature in °C
Fig. 59 Sensor type: NTC 10 k
Ω
1. Pull leads from outlet temperature sensor
2. Check sensor resistance and compare it to the
curve.
3. In the event of severe deviation replace the sensor.
Danger
The outlet temperature sensor is directly
immersed in the DHW (risk of scalding).
Drain the DHW side of the boiler before
replacing the sensor.
Troubleshooting
.
A
105