52
Permissible CO
2
or O
2
content
Operation with natural gas
Rated heating out-
put (kW)
CO
2
content (%)
O
2
content (%)
Upper heating out-
put
Lower heating out-
put
Upper heating out-
put
Lower heating out-
put
11
7.3 - 10.5
7.5 - 10.5
2.1 - 7.9
2.1 - 7.6
19
7.5 - 10.5
7.5 - 10.5
2.1 - 7.6
2.1 - 7.6
25
7.5 - 10.5
7.5 - 10.5
2.1 - 7.6
2.1 - 7.6
32
7.3 - 10.0
7.5 - 10.5
3.1 - 7.9
2.1 - 7.6
Operation with LPG
■
CO
2
content: 8.4 - 11.8 %
■
O
2
content: 3.1 - 8.1 %
If the actual CO
2
or O
2
values lie outside their respec-
tive ranges, proceed as follows:
■
Check the balanced flue system for tightness; see
page 40.
■
Check ionisation electrode and connecting cable.
Note
During commissioning, the combustion controller car-
ries out an automatic calibration. Only measure the
emissions approx. 50 s after the burner has started.
A
Fig. 45
1.
Connect a flue gas analyser at flue gas port
A
on
the boiler flue connection.
2.
Open the gas shut-off valve. Start the boiler. Cre-
ate a heat demand.
3.
Adjust the lower heating output. See the following
chapter.
4.
Check the CO
2
content. If the actual value deviates
from the permissible ranges, implement steps lis-
ted above.
5.
Enter the actual value into the report.
6.
Adjust the upper heating output. See the following
chapter.
7.
Check the CO
2
content. If the actual value deviates
from the permissible ranges by more than 1 %,
implement steps listed above.
8.
Enter the actual value into the report.
9.
Re-seal test port
A
.
Danger
Escaping flue gas can damage your health.
Check test port
A
for leaks.
Setting the upper/lower heating output
Note
Ensure adequate heat transfer.
Tap the following buttons:
0
1.
and
OK
– press simultaneously for approx. 4 s,
then release.
0
2.
Use
/
to select
"Actuator test"
.
0
3. OK
0
4.
Use
/
to select the
"Heating"
group.
0
5. OK
0
6.
Use
/
to select
"Primary circuit pump,
speed"
.
Commissioning, inspection, maintenance
Checking the combustion quality
(cont.)
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