Viessmann VITODENS 200-W Service Instructions Manual page 116

Wall mounted gas condensing boiler natural gas and lpg version
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Troubleshooting
Repairs
(cont.)
3. Refit the casing cover.
Checking the Vitotronic 200-H (accessories)
The Vitotronic 200-H is connected to the control unit via the LON. To test the con-
nection, carry out a subscriber check at the boiler control unit (see page 38).
116

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