Viessmann Vitodens 333 Service Instructions Manual page 89

Repairs
(cont.)
&
Switch position I for central heating
return from the left (delivered condi-
tion).
Checking the Vitotronic 050 (accessories)
The Vitotronic 050 is connected with the control unit via the LON connecting
cable. To test the connection, implement a user check at the boiler control unit
(see page 37).
&
Switch position II for central heating
return from the right.
Troubleshooting
89