Viessmann Vitodens 333-F Service Instructions Manual page 97

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 200-H (accessories)
The Vitotronic 200-H is connected to
the control unit via the LON cable. To
test the connection, carry out a sub-
scriber check at the boiler control unit
(see page 42).
Changing the combustion control parameters
The parameters are changed via the coding addresses in code 2.
Troubleshooting
97