Allocating Heating Circuits To The Remote Control; Electronic Combustion Controller - Viessmann Vitocrossal 300 Service Instructions For Contractors

Allocating heating circuits to the remote control

The heating circuit allocation must be
configured when commissioning the
Vitotrol 200A or Vitotrol 300A.
Heating circuit
The remote control affects the heating circuit with-
out mixer A1
The remote control affects the heating circuit with
mixer M2
The remote control affects the heating circuit with
mixer M3
Note
One heating circuit can be allocated to
the Vitotrol 200A.
Up to three heating circuits can be allo-
cated to the Vitotrol 300A.
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 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.
Configuration
Vitotrol 200A
H 1
H 2
H 3
To check the combustion quality, the
CO content or the O
2
gas is measured. The actual values ena-
ble the prevailing air factor to be deter-
mined. The relationship between the
CO or O content and air factor λ is illus-
2 2
trated in the following table.
Function description
Vitotrol 300A
HK1
HK2
HK3
content of the flue
2
125