Viessmann VITOCROSSAL 200 Instructions Manual page 18

Commissioning, inspection, maintenance
Further details regarding the individual steps
18
(cont.)
3. If the CO content must be adjusted:
2
■ Remove cover B.
■ Turn adjusting screw A in small
increments (Torx 40) until the CO
content reaches the specified
range:
– Turning clockwise
→ CO
content rises
2
– Turning anti-clockwise
→ CO
content falls
2
4. Record the actual value in the report
(on page 61).
Rechecking the values
Regulate to the upper and lower out-
put using the burner control unit. If the
values do not match the permissible
CO content according to the table on
2
page 16, repeat the steps for the
upper and lower output.
5. Press "S" E and "-" D simultane-
ously. The burner is now in operating
mode.
2