149
3. OK
4.
Press / to enter the PIN digits one by one.
Press / to move to the next position.
5.
Confirm with
OK
.
Further information:
Vitocom 100 installation and service instructions
Hydronic balancing
During hydronic balancing using "service case
hydronic balancing with Vitosoft 300",
"Hydraulic bal-
ancing active"
appears on the display.
While the function is enabled, it is not possible to oper-
ate the Vitotronic control unit of the heat generator.
The heat generator is unavailable for heating operation
or other functions during hydronic balancing. The
burner does not start.
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.
To check the combustion quality, the CO
2
content or
the O
2
content of the flue gas is measured. The pre-
vailing air ratio is determined with the measured val-
ues. The relationship between the CO
2
or O
2
content
and air ratio
λ
is illustrated in the following table.
Air ratio
λ–
CO
2
/O
2
content
Air ratio
λ
O
2
content (%) CO
2
content (%) for
natural gas E
CO
2
content (%) for
natural gas LL
CO
2
content (%) for
LPG P
1.20
3.8
9.6
9.2
11.3
1.24
4.4
9.2
9.1
10.9
1.27
4.9
9.0
8.9
10.6
1.30
5.3
8.7
8.6
10.3
1.34
5.7
8.5
8.4
10.0
1.37
6.1
8.3
8.2
9.8
1.40
6.5
8.1
8.0
9.6
1.44
6.9
7.8
7.7
9.3
1.48
7.3
7.6
7.5
9.0
To achieve an optimum combustion control, the system
regularly carries out an automatic self-calibration; also
after a power failure (shutdown). For this, the combus-
tion is briefly regulated to max. ionisation current (cor-
responding to air ratio
λ
=1). Automatic calibration is
carried out shortly after the burner start and lasts
approx. 5 s. During calibration, higher than normal CO
emissions may occur briefly.
Function description
Entering Vitocom 100 PIN code via Vitotronic
(cont.)
5678 044 GB
Functions
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
Page 163: ...163 5678 044 GB ...
