Operating instructions

&
Switch position I for central heating
return from the left (delivered condi-
tion).
&
Switch position II for central heating
return from the right.
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).
Repairs (cont.)
89
Troubleshooting
5692 619 GB