Bosch Worcester GB162-100 V2, Installation, Commissioning And Servicing Instructions, Page: 34 / 52

Commissioning
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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
2
content
▶ Take the boiler out of operation.
▶ Remove the cap of the flue gas testing point [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.
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.
6 720 807 034-066.1DDC
1
6 720 807 034-63.2DDC
2 1