Viessmann VITODENS 100-W Installation And Service Instructions Manual page 47

For contractors. wall mounted gas condensing boiler natural gas and lpg version

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Repairs

(cont.)

Checking the outlet temperature sensor (gas condensing combi

boiler)

0.8

0.6

0.4

10 30 50 70 90 110

Temperature in °C

1. Pull out the leads from outlet temper-

ature sensor.A

2. Check the sensor resistance and

compare it with the curve.

3. Replace the sensor in the case of

severe deviation.

Note

Water can leak when replacing the

outlet temperature sensor. Shut off

the cold water supply. Drain the DHW

line and the plate heat exchanger

(DHW side).

Troubleshooting

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