Viessmann VITOCROSSAL 200 Service Instructions Manual page 55

Burner control unit
2. for lower heating output,
until "0" is shown under Serv-
ice.
3. for upper heating output,
until "100" is shown under Serv-
ice.
4. /S simultaneously for longer than
2 s.
The burner returns to modulat-
ing mode.
(cont.)
Burner control unit
55