Viessmann B1HF Installation And Service Instructions Manual page 55

Checking the combustion quality
Permissible CO or O
2 2
Operation with natural gas
Rated heating out- CO
put (kW)
Upper heating out-
put
11
7.3 - 10.5
19 7.5 - 10.5
25 7.5 - 10.5
32 7.3 - 10.0
Operation with LPG
■ CO content: 8.4 - 11.8 %
2
O content: 3.1 - 8.1 %
■
2
If the actual CO, CO or O
2
respective ranges, proceed as follows:
■ Check the balanced flue system for leaks; see
page 44.
Check the ionisation electrode and connecting cable,
■
see page 48.
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.
1. Connect a flue gas analyser at flue gas port
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 content. If the actual value deviates
2
from the permissible ranges, implement steps lis-
ted above.
5. Enter the actual value into the report.
Regulating to the upper/lower heating output
Note
Ensure adequate heat transfer.
Tap the following buttons:
1. and OK simultaneously for approx. 4 s, then
release.
content
content (%)
2
Lower heating out-
put
7.3 - 10.5
7.5 - 10.5
7.5 - 10.5
7.3 - 10.5
values lie outside their
2
on
A
Commissioning, inspection, maintenance
(cont.)
O content (%)
2
Upper heating out-
put
2.1 - 7.9
2.1 - 7.6
2.1 - 7.6
3.1 - 7.9
A
Fig. 39
6. Adjust the upper heating output. See the following
chapter.
7. Check the CO content. If the actual value deviates
2
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
2. Use / to select "b.6" for the upper/lower
heating output.
3. OK
4. Use / to set the value.
"0" - OFF
"1" - Min. heating output
"2" - Max. heating output
Lower heating out-
put
2.1 - 7.9
2.1 - 7.6
2.1 - 7.6
2.1 - 7.9
for leaks.
A
55