Viessmann Vitodens 200-W Installation And Service Instructions Manual page 138

125 and 150 kw wall mounted gas condensing boiler natural gas and lpg version
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Troubleshooting
Repair
(cont.)
Replacing the flow rate sensor
Note
In the event of a fault, both sensors need
to be replaced.
1. Drain the boiler on the heating water
side.
2. Pull leads from flow rate sensor A.
138
A
3. Undo screws and remove faulty flow
4. Install new flow rate sensor A and
rate sensor A.
secure with the screws.

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Type b2haVitodens 200-w b2ha

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