Viessmann VITOCROSSAL 200 Service Instructions Manual page 15

Further details regarding the individual steps
CO test at the lower heating output
2
(87 kW)
Commissioning, inspection, maintenance
(cont.)
3. If the CO content must be adjusted:
2
Turn adjusting screw A in small
increments until the CO
ches the specified range.
■ Turning clockwise
→ CO content falls
2
■ Turning anti-clockwise
→ CO content rises
2
Note
The adjusting screw has no end-stop.
The starting position will be reached
again after 4 turns.
4. Record the actual value in the report
(on page 61).
1. Press "-" D until the service display
has decremented to "00" (lower heat-
ing output).
2. Check the CO
2
pipe. For permissible CO
see the table on page 14.
content rea-
2
content at the flue
content,
2
15