Viessmann VITODENS 200-W Installation Instructions Manual page 62

Vitoden 200-W pages 44 -
Combustion
If the actual CO
the following steps:
• Check the balanced flue system for soundness, see page 61
• Check the ionisation electrode and connecting lead, see service instructions.
• Check the parameters of the combustion control unit, see service instructions.
Note
During commissioning, the combustion control unit carries out an automatic calibration. This
may lead to CO emissions in excess of 1000 ppm for a short time.
1. Connect a flue gas analyser at test port
A
(on the boiler flue outlet).
2. Open the gas shut-off valve, start the
boiler and create a heat demand.
3. Adjust the lower output of the
constant temperature control unit:
+ press simultaneously:
OK
"1" is shown
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or O values lie outside their respective ranges, proceed with
2 2
Page 19
4. Check the CO content. Should the
2
actual value deviate from the above
ranges by more than 1%, implement
steps above.
5. Enter actual values into the service
report.
6. Adjust the upper output on the
constant temperature control unit:
+ press: "2" is shown
7 . Check the CO content. Should the
2
actual value deviate from the above
ranges by more than 1%, implement
steps above.