166
The heating circuit allocation must be
configured when commissioning the
Vitotrol.
Heating circuit
Vitotrol configuration
200A/200 RF
300A/300 RF
The remote control affects the heating circuit with-
out mixer A1
H 1
HC 1
The remote control affects the heating circuit with
mixer M2
H 2
HC 2
The remote control affects the heating circuit with
mixer M3
H 3
HC 3
Note
One heating circuit can be assigned to
the Vitotrol 200A/200 RF.
Up to three heating circuits can be
assigned to the Vitotrol 300A/300 RF.
Up to 2 remote controls may be connec-
ted to the control unit.
If the heating circuit allocation is later
cancelled, reset coding address A0 for
this heating circuit to 0 (fault message
bC, bd, bE).
Electronic combustion control unit
The electronic combustion controller uti-
lises the physical correlation between
the level of the ionisation current and the
air ratio λ. The maximum ionisation cur-
rent is achieved at an air ratio of 1 for all
gas qualities.
The ionisation signal is evaluated by the
combustion controller and the air ratio is
adjusted to a value 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 prevailing air ratio
is determined with the measured values.
The relationship between the CO
2
or O
2
content and air ratio λ is illustrated in the
following table.
Function description
Allocating heating circuits to the remote control
5773 216 GB
Summary of Contents for Vitodens 222-F B2TA series
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Page 31: ...31 4 1 5 2 2x 3 Installing the boiler Fitting the front panels 5773 216 GB Installation...
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