Checking All Gas Equipment For Tightness At Operating Pressure; Fitting The Front Panel; Checking The Combustion Quality - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Commissioning, inspection, maintenance

Checking all gas equipment for tightness at operating pressure

Danger
Escaping gas leads to a risk of explosion.
Check all gas equipment for tightness.

Fitting the front panel

See page 30.

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 156. For a description of the electronic combus-
tion controller functions, see page 152.
Note
To prevent operating faults and damage, operate the
appliance with uncontaminated combustion air.
CO content
■ The CO content must be < 1000 ppm for all gas
types.
CO or O content
2 2
■ The CO content must be within the following limits
2
for the lower and upper heating output respectively:
– 7.5 to 9.5 % for natural gas E and LL
8.8 to 11.1 % for LPG P
–
The O content must be between 4.0 and 7.6 % for
■
2
all gas types.
A
Fig. 36
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 leak detection agent residues after testing.
If the actual CO, CO
2
respective ranges, proceed as follows:
Check the balanced flue system for tightness; see
■
page 41.
2
■ Check the ionisation electrode and connecting cable;
see page 44.
Note
During commissioning, the combustion controller car-
ries out an automatic calibration. Allow approx. 30 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 and
create a heat demand.
3. Set the lower heating output (see page 49).
4. Check the CO or O
2
more than 1 % (CO
given above, carry out the steps on page 48.
5. Enter the actual value into the report.
6. Set the upper heating output (see page 49).
or O values lie outside their
2
content. If the value varies by
2
) or 1.5 % (O ) from the ranges
2 2
on
A