Checking The Co Content - Viessmann VITODENS 050-W Installation And Service Instructions Manual

Further details regarding the individual steps
3 m
Checking the CO
The Vitodens 050-W is factory-set for
natural gas. During commissioning or
maintenance, the CO
be measured at the boiler flue adaptor
test port to check the flue integrity.
Depending on the Wobbe index, the
CO content fluctuates between 7.5 %
2
and 10.5 %. A CO level of up to
500 ppm during start-up is acceptable.
content
2
and CO have to
2
Commissioning, inspection, maintenance
(cont.)
We recommend measuring the O
this value is unmistakable regarding
lambda (air/gas). The O
ates between 7.5 % and 2.2 %. The
CO/CO ratio must be less than 0.004.
2
If the actual CO or O
2
deviate from the stated range, check
the balanced flue system for leaks. If
the flue installation is OK, change the
gas valve.
, as
2
content fluctu-
2
and CO values
2
37