Checking The Co 2 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. Sub-
ject to the Wobbe index, the CO
fluctuates between 7.5 % and 10.5 %. A
CO level of up to 500 ppm during start-
up is acceptable.
content
2
and CO have to
2
content
2
Commissioning, inspection, maintenance
(cont.)
We recommend measuring O
value is unmistakable regarding lambda
(air/gas). The O -content fluctuates
2
between 7.5 % and 2.2 %. The CO/CO
ratio has to be less than 0.004.
If the actual CO or O
2
deviate from the stated range, check the
balanced flue systems for leaks. If the
flue installation is OK, change the gas
valve.
as the
2
2
and CO values
2
33