5 x Service and maintenance
30
BA ROTEX A1 BO - 10/2007
5.2.5 Checking and cleaning the combustion chamber
If you detect contamination in the combustion chamber, the combustion chamber and burner must be cleaned. Severe
contamination of the burner indicates a worn or contaminated oil nozzle or incorrect burner adjustment. If necessary, have the
burner readjusted by a heating expert.
Opening the combustion chamber
Special tool: Combustion chamber key, fixed on the inside of the boiler panels (included in the supply).
• Disconnect the oil condensing boiler from the power supply (fuse, main switch off) and secure against unintentional restart.
• Remove four Allan screws M10 (see fig. 5-11).
• Tilt the combustion chamber upwards (see fig. 5-12). An air pressure spring keeps the upper half of the combustion chamber
open.
• Only in A1 BO 27i and A1 BO 35i: Remove cylindrical combustion chamber ring.
• Remove combustion chamber insert with the help of the combustion chamber key (fig. 5-13 and fig. 5-14).
WARNING!
Danger of burning – hot surfaces.
• Before starting work on the burners, the combustion chamber and the combustion chamber inserts, allow
them to cool down.
• Wear protective gloves.
Fig. 5-11 Opening the combustion chamber Fig. 5-12 Fold the combustion chamber upwards
Fig. 5-13 Attach combustion chamber key
(shown A1 BO 20i)
Fig. 5-14 Lift out the bottom combustion chamber insert
(shown A1 BG 20i)
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