Viessmann Vitodens 200 Service Instructions Manual page 85

Type wb2a, 8.8 to 20.0 kw wall mounted gas fired condensing boiler natural gas and lpg version

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Repairs

(cont.)

2. Change over the rotational direc-

tion switch:

Switch position I for central heating

return from the left (delivered con-

dition).

Switch position II for central heat-

ing return from the right.

Checking the Vitotronic 050 (accessories)

The Vitotronic 050 is connected to the control unit via the LON cable. To test the

connection, implement a user check at the boiler control unit (see page 32).

Troubleshooting

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