Boiler Connection - Viessmann Vitodens 100-W B1HA 26Vitodens 100-W B1HA 35Vitodens 100-W B1KA 35 Installation And Service Instructions Manual

Troubleshooting

Boiler Connection

Start-up and Maintenance
WARNING
The boiler temperature sensor is immersed in the
heating water (risk of scalding).
Drain the boiler before replacing the sensor.
58
Vitodens 100-W, B1HA series & B1KA Combi Installation/Service
Remove front panel
1. Loosen retaining screws, screws are captive and do
not need to be fully removed.
2. Remove the front panel.
Check boiler temperature sensor
1. Disconnect cables from boiler temperature sensor A.
2. Measure resistance of the boiler temperature sensor
and compare with resistance/boiler water temperature
curve shown.
3. If the value measured differs significantly, replace the
sensor.
Boiler water temperature