Bosch Greenstar 12i Service Manual Page 45

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SERVICE AND SPARES
6 720 644 743b (2011/08)
45
6.5 FLUE GAS ANALYSIS
COMBUSTION TEST:
B Connect the flue gas analyser to the flue gas sampling
point as shown in the figure below.
B Run the boiler at maximum output for at least 10
minutes.
B Check the CO/CO
2
readings against the information
in table 27 CO/CO
2
settings.
Fig. 77 Combustion test
If the boiler fails the combustion test, check:
1. Air intake for restriction
2. Diaphragm in the fan, for correct operation
3. Cleanliness of the heat cell, plus blockages in the
condensate disposal
6720643895-101.1Wo
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