Checking The Co 2 Content - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Adjusting the burner settings if several...
Rated heating output 35 kW
Number of boilers
Correction factor (adjustable value)
0
1
2
3
4
5
6
Rated heating output 35 kW
Number of boilers
Correction factor (adjustable value)
0
1
2
3
4
5
6
Note
The correction factor changes the boiler modulation
range.
Checking the CO
The Vitodens 100-W is factory-set for natural gas. Dur-
ing commissioning or maintenance, the CO
have to be measured at the boiler flue adaptor test port
to check the flue integrity. Subject to the Wobbe index,
the CO content fluctuates between 7.5 % and 10.5 %.
2
CO of up to 500 ppm during start-up is acceptable.
We recommend measuring the O
unmistakable regarding lambda (air/gas). The O
tent fluctuates between 7.5 % and 3.2 %. The CO/CO
ratio has to be less than 0.004.
If the actual CO or O and CO values deviate from the
2 2
stated range, check the balanced flue system for
leaks. If the flue installation is OK, change the gas
valve.
Note
Operate the appliance with uncontaminated combus-
tion air to prevent operating faults and damage.
1. Connect a flue gas analyser at flue gas port
the boiler flue connection.
operation with natural gas
–
operation with LPG
–
content
2
and CO
2
, as this value is
2
con-
2
2
A on
Commissioning, inspection, maintenance
(cont.)
2
Flue length a (m)
18
≤
> 18 25 > 4
≤
> 16
–
–
–
–
2
Flue length a (m)
21
≤
> 21 25 > 5
≤
> 15
–
> 23
–
–
–
A
Fig. 26
3 4
4
≤
16 6
≤ ≤
25 > 6 11
≤ ≤
> 11 17
– ≤
> 17 25
– ≤
– –
3 4
5
≤
15 6
≤ ≤
23 > 6 10
≤ ≤
25 > 10 16
≤ ≤
> 16 22
– ≤
> 22 25
– ≤
37