Viessmann Vitocrossal 200 Service Instructions For Contractors page 21

Further details regarding the individual steps
CO test at lower heating output
2
B A
C
D
E
F
Commissioning, inspection, maintenance
(cont.)
D until the service indicator
1. Press
has decremented to "0" (lower heat-
ing output).
2. Check the CO
2
pipe.
content at the flue
21