Air factor
λ
–
CO
2
/O
2
content
Air factor
λ
O
2
content
(%)
CO
2
content
(%) for natur-
al gas E
CO
2
content
(%) for natur-
al gas LL
CO
2
content
(%) for LPG P
1.24
4.4
9.2
9.1
10.9
1.27
4.9
9.0
8.9
10.6
1.30
5.3
8.7
8.6
10.3
1.34
5.7
8.5
8.4
10.0
1.37
6.1
8.3
8.2
9.8
1.40
6.5
8.1
8.0
9.6
1.44
6.9
7.8
7.7
9.3
To achieve an optimum combustion
control, the system regularly carries
out an automatic self-calibration; also
after a power failure (shutdown). For
this, the combustion is briefly regu-
lated to max. ionisation current
(equals air factor
λ
=1). The automatic
calibration is carried out shortly after
the burner start and lasts approx. 5 s.
This may lead to CO emissions in
excess of 1000 ppm for a short time.
The combustion control unit can also
be calibrated manually. e.g. after
maintenance or service work (see
page 112).
Electronic combustion control unit
(cont.)
128
Function description
5592
883
GB
Summary of Contents for VITODENS 343-F WS4A
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