Checking The Electrical Connections For Firm Seating 29. Checking All Gas Equipment For Leaks At Operating Pressure; Fitting The Front Panel; Checking The Combustion Quality - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Checking the electrical connections for firm seating
Checking all gas equipment for leaks at operating pressure
Danger
Escaping gas leads to a risk of explosion.
Check gas equipment (including inside the appli-
ance) for leaks.

Fitting the front panel

See page 31.

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
or O content, and record these in the report on
2
page 111.
Permissible CO content
The CO content must be < 1000 ppm for all gas types.
Permissible CO or O
2 2
Operation with natural gas
Rated heating out- CO
put (kW)
Upper heating out-
put
25 7.5 to 10.5
32 7.3 to 10.0
Operation with LPG
CO content: 8.4 to 11.8 %
■
2
O content: 3.1 to 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 47.
Check the ionisation electrode and connecting cable,
■
see page 50.
content
content (%)
2
Lower heating out-
put
7.5 to 10.5
7.3 to 10.5
values lie outside their
2
Commissioning, inspection, maintenance
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.
Note
To prevent operating faults and damage, operate the
appliance with uncontaminated combustion air.
2
O content (%)
2
Upper heating out-
put
2.1 to 7.6
3.1 to 7.9
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.
Lower heating out-
put
2.1 to 7.6
2.1 to 7.9
57