105
Remote control
DIP switch setting
The remote control affects the heating cir-
cuit without mixer A1
1 2 3 4
ON
The remote control affects the heating cir-
cuit with mixer M2
1 2 3 4
ON
When connecting a separate room tem-
perature sensor, set DIP switch "3" to
"ON".
1 2 3 4
ON
Electronic combustion control unit
The electronic combustion controller uti-
lises the physical correlation between
the level of the ionisation current and the
air factor
λ
. For all gas qualities, the max-
imum ionisation current results with air
factor 1.
The ionisation signal is evaluated by the
combustion control unit, and the air fac-
tor is adjusted to between
λ=
1.24 and
1.44. This range provides for an optimum
combustion quality. Thereafter, the elec-
tronic gas valve regulates the required
gas volume subject to the prevailing gas
quality.
To check the combustion quality, the
CO
2
content or the O
2
content of the flue
gas is measured. The actual values ena-
ble the prevailing air factor to be deter-
mined. The relationship between the
CO
2
or O
2
content and air factor
λ
is illus-
trated in the following table.
Function description
Remote control DIP switches
(cont.)
5692 760 GB
Summary of Contents for VITOCONTROL-S, WB2B
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