Viessmann VITOCROSSAL 200 Service Instructions Manual page 15

Further details regarding the individual steps
B A
CO test at the lower output
2
C
D
E
F
Commissioning, inspection, maintenance
(cont.)
3. If the CO content must be adjusted:
2
■ Remove cap B.
■ Turn adjusting screw A in small
increments (3 mm Allen key) until
the CO content reaches the speci-
2
fied range:
– Turning clockwise
→ CO
content falls
2
– Turning anti-clockwise
→ CO
content rises
2
4. Record the actual value in the report
(on page 65).
!
Please note
The CO
be lower in partial load than it
is in full load.
1. Press "-" D until the service display
has gone down to "0" (lower output).
2. Note
The CO content for all natural gases
2
must be between 7.5 and 10.5 %.
Check the CO
2
pipe. For permissible CO
see the table on page 14.
content must always
2
content at the flue
content,
2
15