48
Note
Only use suitable and approved leak detection agents
(EN 14291) and devices for the tightness test. Leak
detection agents with unsuitable constituents (e.g.
nitrides, sulphides) can cause material damage.
Remove residues of the leak detection agent after test-
ing.
Fitting the front panel
See page 27.
Checking the combustion quality
The electronic combustion controller automatically
ensures optimum combustion quality. During commis-
sioning/maintenance, only the combustion values need
to be checked. To do this, test the CO content and CO
2
or O
2
content, and record these in the report on
page 89.
Note
To prevent operating faults and damage, operate the
appliance with uncontaminated combustion air.
Permissible CO content
The CO content must be < 1000 ppm for all gas types.
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
19
7.3 to 10.5
7.3 to 10.5
2.1 to 8.4
2.1 to 8.4
25
7.3 to 10.5
7.3 to 10.5
2.1 to 8.4
2.1 to 8.4
Operation with LPG
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
19
8.4 to 11.8
8.4 to 11.8
3.1 to 8.1
3.1 to 8.1
25
8.4 to 11.8
8.4 to 11.8
3.1 to 8.1
3.1 to 8.1
If the actual CO, CO
2
or O
2
values lie outside their
respective ranges, proceed as follows:
■
Check the balanced flue system for leaks: See
page 39.
■
Check the ionisation electrode and connecting cable:
See page 42.
Note
During commissioning, the combustion controller car-
ries out an automatic calibration. Allow approx. 50 s
after the burner has started before testing the emis-
sions.
Commissioning, inspection, maintenance
Checking all gas equipment for leaks at…
(cont.)
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