Bosch Condens 8300i W - Tightness Test of the Flue Gas Path; CO Test of Flue Gas; Checking the Electrodes

Inspection and maintenance
41
Condens 8300i W – 6721841531 (2022/10)
9.7.2 Tightness test of the flue gas path
Measurement of O
2
or CO
2
content in combustion air.
Use an annular gap probe for the measurement.
For flue gas routing of concentric flue systems, the tightness of the flue
gas path can be tested with an O
2
or CO
2
measurement of the
combustion air. The O
2
level must not fall below 20,6%. The CO
2
content
must not exceed 0,2%.
▶ Remove the plug from the combustion air test nipple [2].
▶ Insert a flue gas probe into the connector and seal the test point.
▶Set the maximum rated output in chimney sweep mode.
Fig. 44 Flue gas test port and combustion air test nipple
[1] Flue gas test port
[2] Combustion air test nipple
▶Measure the O
2
and the CO
2
content.
▶ Press the " key.
The device returns to normal operation.
▶ Remove the flue gas probe.
▶ Re-install the plug.
9.7.3 CO test of flue gas
Use a multi-hole flue gas probe for the measurement.
▶ Remove the plug from the flue gas test port [1].
▶ Insert a flue gas probe into the port as far as it will go and seal the test
point.
▶Set the maximum rated output in chimney sweep mode.
▶ Measure the CO content.
▶ Press the OK key.
The device returns to normal operation.
▶ Remove the flue gas probe.
▶ Re-install the bung.
9.8 Checking the electrodes
▶ Remove the electrode set with gasket.
▶ Check electrodes for pollution.
▶ Clean or replace electrodes if required.
▶ Install electrode set with new gaskets.
Fig. 45 Installing electrode set
▶ Check tightness of electrode set.
Fig. 46 Checking tightness
6 720 614 153-08.2O
1
2
0010007498-002
3 + 1 Nm
0010007499-003
Gas/Gaz?