113
Example using the settings in the delivered condition
10
0
20
30
30
40
50
60
6
7
8
9
Boiler
water
temperature/
set flow temperature
in
°C
Time
A
B
C
D
Fig. 77
A
Start of operation with standard room temperature
B
Set boiler water or flow temperature in accordance
with the selected heating curve
C
Set boiler water temperature or set flow tempera-
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
Assigning heating circuits to the remote control
The heating circuit assignment must be configured
when commissioning the Vitotrol.
Heating circuit
Vitotrol configuration
200-A/200-RF
300-A
The remote control affects the heating circuit without 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
■
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.
■
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).
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
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 electronic
gas valve regulates the required gas volume subject to
the prevailing gas quality.
Function description
Control functions
(cont.)
5778741
Functions
