Assigning Heating Circuits To The Remote Control; Electronic Combustion Control Unit - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Control functions
(cont.)
Example using the settings in the delivered condition
C
D
B
60
50
40
30 30
20
10
A
0
6 7
Time
Fig. 77
Start of operation with standard room temperature
A
Set boiler water or flow temperature in accordance
B
with the selected heating curve

Assigning heating circuits to the remote control

The heating circuit assignment must be configured
when commissioning the Vitotrol.
Heating circuit
The remote control affects the heating circuit without mixer A1.
The remote control affects the heating circuit with mixer M2.
The remote control affects the heating circuit with mixer M3.
One heating circuit can be assigned to the Vitotrol
■
200A/200 RF.
Up to 3 heating circuits can be assigned to the
■
Vitotrol 300-A.

Electronic combustion control unit

The electronic combustion controller utilises the physi-
cal correlation between the level of the ionisation cur-
rent and the air ratio . The maximum ionisation cur-
λ
rent is achieved at an air ratio of 1 for all gas qualities.
8 9
Set boiler water temperature or set flow tempera-
C
ture in accordance with parameter FA:
50 °C + 20 % = 60 °C
D Duration of operation with higher set boiler water
temperature or set flow temperature in accordance
with parameter Fb:
60 min
Vitotrol configuration
200-A/200-RF
H 1
H 2
H 3
Up to 2 remote control units can be connected to the
■
control unit.
If the heating circuit allocation is later cancelled,
■
reset parameter/coding address A0 for this heating
circuit to 0 (fault message bC, bd, bE).
The ionisation signal is evaluated by the combustion
controller and the air ratio is adjusted to a value
between =1.24 and 1.44. This range provides for an
λ
optimum combustion quality. Thereafter, the electronic
gas valve regulates the required gas volume subject to
the prevailing gas quality.
Function description
300-A
HC 1
HC 2
HC 3
113