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Service and maintenance
FA ROTEX A1 BOe - 02/2014
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9.2.5 Checking and cleaning the combustion
chamber
If there are impurities, or if unsatisfactory combustion values are
detected, the combustion chamber must be cleaned and
readjusted. If necessary, reset the burner (see chapter 7.3).
Opening the combustion chamber
Special tool:
Combustion chamber key, fixed on the inside of the
boiler panels (included in the supply).
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Remove four M10 inner hex screws (fig. 9-11).
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Hinge the top half of the burner chamber upwards (fig. 9-12).
An air pressure spring keeps the upper half of the combustion
chamber open.
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Only on A1 BO 27-e and A1 BO 34-e:
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Remove the top burner chamber ring (perforated).
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Remove the cylindrical burner chamber.
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Remove the lower combustion chamber inset using the
combustion chamber wrench (fig. 9-13).
Cleaning the combustion chamber
Depending on the heating oil quality and the operating tempera-
tures, extremely different deposits and contamination are formed
in the A1 BO.
Requirement:
The gap between the bottom combustion chamber half and the
sound deadening shell in the joint area is covered to prevent res-
idues from the upper combustion chamber half from falling into
the gap.
Special tool:
Cleaning brush and scraper fixed on the inside of
the boiler panels (included in the supply).
Remove dry residue (mostly in the upper combustion chamber
half):
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Loosen the dirt and soot on the combustion chamber ribs by
using the cleaning brush and cleaning scraper.
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Suction off the loosened dirt and soot by using a vacuum
cleaner.
Hard residues may arise in the transition region between dry and
water combustion chamber surfaces (usually in the lower half
shell of the boiler). These can only be removed by wet cleaning.
For this:
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Loosen dirt and rust under running water spray (fig. 9-14) with
cleaning brushes and scrapers.
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Rinse off loosened dirt with clean water into the drain.
WARNING!
Live parts can cause an electric shock on contact and
cause fatal burns and injuries.
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Before beginning maintenance work, disconnect
the ROTEX GSU from the power supply ROTEX
A1 BO (switch off fuse, main switch) and secure
against unintentional restart.
WARNING!
Danger of burning - hot surfaces.
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Before starting work on the burners, the
combustion chamber and the combustion chamber
inserts, allow them to cool down.
Ɣ
Wear protective gloves.
Fig. 9-11 Opening the combustion chamber
Fig. 9-12 Hinge the top half of the burner chamber upwards.
Fig. 9-13 Lifting out the bottom combustion chamber set
(illustrated A1 BO 15-e / A1 BO 20-e)
Fig. 9-14 Cleaning the combustion chamber with a water hose
