Commissioning
Condens 5000W – 6720813952 (2019/02)
24
Open gas isolation valve.
Bring wall mounted gas condensing boiler into operation.
Make sure that the wall mounted gas condensing boiler can release its
heat.
Start the flue gas inspector mode ( Chapter 7.3).
Set the smallest possible output value (partial load).
Measure gas/air ratio.
This differential pressure must be between -10 and 0 Pa (-0.10 and
0.00 mbar) with partial load. If not, the gas valve must be replaced.
Enter the measurement in the maintenance protocol
( Chapter 11.15, page 31).
Exit flue gas inspector mode.
Take the wall mounted gas condensing boiler out of operation.
Close gas isolation valve.
Remove the pressure gauge.
Close test nipple.
Open gas isolation valve.
Bring wall mounted gas condensing boiler into operation.
8.9 Measure the CO and CO
2
content
Assuming combustion with excess air, the CO content of the flue gas
must be less than 400 ppm, or 0.04 % by volume. If the CO content is
roughly 400 ppm or higher, the cause, which is most likely to be related
to soiling of the burner, a defect in the burner or recirculation of the flue
gases, must be found.
Take the wall mounted gas condensing boiler out of operation.
Remove the cap of the flue gas testing point [1].
Fig. 48 Removing the cap of the flue gas testing point.
[1] Flue gas testing point
[2] Air supply testing point
Connect the flue gas analyser to the test point.
Bring wall mounted gas condensing boiler into operation.
Make sure that the wall mounted gas condensing boiler can release its
heat.
Start the flue gas inspector mode ( Chapter 7.3).
Measure the CO content.
Establish and eliminate the cause of a possible high CO content.
Enter the CO content in the maintenance protocol
( Chapter 11.15).
Set the output to 100%.
Measure the CO
2
content.
Enter the CO
2
content in the maintenance protocol
( Chapter 11.15).
Set partial load output.
Measure the CO
2
content.
Enter the CO
2
content in the maintenance protocol
( Chapter 11.15).
Switch off flue gas inspector mode.
Take the wall mounted gas condensing boiler out of operation.
Remove flue gas analyser.
Mount the cap of the flue gas testing point.
Bring wall mounted gas condensing boiler into operation.
8.10 Measure ionisation current
Take the wall mounted gas condensing boiler out of operation.
Pull off the plug of the ionisation cable.
Connect the multi-meter on both sides of the plug-in connector (in
series).
Fig. 49 Connecting the multi-meter
Set the measuring range A at the multi-meter.
Bring wall mounted gas condensing boiler into operation.
Make sure that the wall mounted gas condensing boiler can release its
heat.
Start the flue gas inspector mode ( Chapter 7.3).
Set the smallest possible output value (partial load).
Measure the ionisation current.
The ionisation current must be at least 3 A.
If the value is lower, check the gas/air ratio and the monitoring
electrode.
Enter the value in the maintenance protocol ( Chapter 11.15).
Switch off flue gas inspector mode.
Take the wall mounted gas condensing boiler out of operation.
Remove the multi-meter.
Push on the plug of the ionisation cable.
Bring wall mounted gas condensing boiler into operation.
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