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The heating circuit assignment must be
configured when commissioning the
Vitotrol 200A or Vitotrol 300A.
Heating circuit
Configuration
Vitotrol 200A Vitotrol 300A
The remote control affects the heating circuit with-
out mixer A1
H 1
HK1
The remote control affects the heating circuit with
mixer M2
H 2
HK2
The remote control affects the heating circuit with
mixer M3
H 3
HK3
Note
The Vitotrol 300A can be assigned to
one heating circuit, two heating circuits
or all three heating circuits.
Electronic combustion controller
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 controller, and the air factor
is adjusted to between λ=1.24 and 1.44.
This range provides for an optimum com-
bustion 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
Assigning the heating circuits to the remote control
5457 552 GB
