Flue Gas Emissions Test - Viessmann VITODENS 200-W WB2B Service Instructions For Contractors

Further details regarding the individual steps

Flue gas emissions test

The electronic combustion control unit automatically ensures an optimum com-
bustion quality. Only the combustion values need to be checked during commis-
sioning and maintenance. For this, check the CO
description of the electronic combustion control unit, see page 102.
CO or O content
2 2
The CO content at the upper and lower output for natural gas E and LL must in
2
each case be within the range 7.7 to 9.2%:
For all gas types, the O
If the actual CO or O
2 2
balanced flue system for tightness, see page 16.
Note
During commissioning, the combustion control unit carries out an automatic
calibration. Only test the emissions approx. 30 s after the burner has started.
1. Connect a flue gas analyser at flue
gas port A on the boiler flue con-
nection.
2. Open the gas shut-off valve, start
the boiler and create a heat
demand.
Commissioning, inspection, maintenance
content must be between 4.4% and 6.9%.
2
values lie outside their respective ranges, check the
3. Adjust the lower output.
Constant temperature control
unit:
K + d
Weather-compensated control
unit:
K + d
4. Check the CO
actual value deviate by more than
1% from the above ranges, check
the balanced flue system for tight-
ness, see page 16.
5. Enter actual values into the service
report.
(cont.)
or O content. For a function
2 2
press simultaneously:
"1" is shown.
press simultaneously:
"Relay test" and then
"Base load" is shown.
content. Should the
2
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