91
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. 57
A
Start of operation at standard room temperature
B
Set boiler water or flow temperature in accordance
with the selected heating curve
C
Set boiler water or flow temperature in accordance
with coding address "FA":
50 °C + 20 % = 60 °C
D
Duration of operation with raised set boiler water
or flow temperature in accordance with coding
address "Fb":
60 min
Allocating heating circuits to the remote control
The heating circuit allocation 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
■
The Vitotrol 200-A/200-RF can have 1 heating circuit
assigned.
■
The Vitotrol 300-A can have up to 3 heating circuits
assigned.
■
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 combustion controller analyses the ionisation sig-
nal. The air ratio is regulated to a value between
λ
=1.24 to 1.44. This range provides for an optimum
combustion quality. Thereafter, the electronic gas train
regulates the required gas volume subject to the pre-
vailing gas quality.
Function description
Control functions
(cont.)
5839829
Functions
