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Commissioning
1
Fig. 70 Open the burner pressure nipple at the 85-V2 and 100-V2
▶ Connect the pressure gauge.
▶ Set the pressure gauge to "0".
Hold the pressure gauge at the same height when the measurement
is in progress.
▶ Open the gas isolation valve.
▶ Bring the boiler into operation.
▶ Make sure that the boiler can dissipate the heat generated.
▶ Start the chimney sweep mode ( Chapter 7.3).
▶ Set the smallest possible output value (partial load).
▶ Measure the 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 43).
▶ Exit the chimney sweep mode.
▶ Take the boiler out of operation.
▶ Close the gas isolation valve.
▶ Remove the pressure gauge.
▶ Close the test nipple.
▶ Open the gas isolation valve.
▶ Bring the boiler into operation.
8.9
Measure the CO and CO
Assuming combustion with excess air, the CO content of
the flue gas must be less than 350 ppm, or 0.035 % by
volume. If the CO content is roughly 350 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 boiler out of operation.
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6 720 807 034-066.1DDC
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2
▶ Remove the cap of the flue gas testing point [1].
1
Fig. 71 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 the boiler into operation.
▶ Make sure that the boiler can dissipate the heat generated.
▶ Start the chimney sweep mode ( Chapter 7.3).
▶ Switch off the chimney sweep mode.
▶ Take the boiler out of operation.
▶ Remove the flue gas analyser.
▶ Mount the cap of the flue gas testing point.
▶ Bring the boiler into operation.
2
6 720 807 034-63.2DDC
6720814332 (2018/04)
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