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Service and maintenance
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BA ROTEX A1 BO - 10/2007
Cleaning the combustion chamber
Depending on the heating oil quality and the operating temperatures, deposits and contamination of varying intensity are formed
in the A1 BO.
Requirement:
The gap between the boiler half shell in the joint area is covered to prevent residues from the upper boiler half shell from falling
into the gap.
Special tool:
Cleaning brush, cleaning scraper (included in scope of supply).
Remove dry residue (mostly in the upper boiler half cup):
• Loosen the dirt and soot on the combustion chamber ribs by using the cleaning brush and cleaning scraper.
• Suction off the loosened dirt and soot by using a vacuum cleaner.
In the transition area between dry and moist combustion chamber areas (mostly in the lower boiler half cup) there is hard residue
that can be removed only with wet cleaning. For this:
• Loosen dirt and rust under running water spray (fig. 5-15) with cleaning brushes and scrapers.
• Rinse off loosened dirt with clean water into the drain.
Always remove any existing residue with high pressure cleaner. For this:
• Close combustion chamber without combustion chamber insert.
• Unscrew burner including burner flange.
• Clean combustion chamber through burner flange opening with high pressure cleaner (fig. 5-16).
Closing the combustion chamber
• Insert the combustion chamber insert.
• For oil condensing boilers A1 BO 27i and A1 BO 35i: Insert combustion chamber ring.
• Close combustion chamber and tighten the 4 Allen screws M10 so that the combustion chamber is tightly sealed.
• Connect up power supply (fuse, main switch engagement).
• Start the burner briefly without the heat insulation covers and check for leaks.
• Fit the heat insulation covers and the sound insulation hood.
5.2.6 Check burner and oil filter
Checking the burner includes visually inspecting the burner's condition as well as making flue gas measurements.
The quality of combustion and correct burner adjustment can only be checked with a flue gas analyser. ROTEX recommends that
this test be carried out annually by a heating expert.
Fig. 5-15 Wet clean combustion chamber
Fig. 5-16 Clean combustion chamber with high pressure cleaner
In the course of the maintenance activities, the automatic firing unit DKO 974 must also be rechecked to see
whether it attains the rated life cycle: 10 years or 250,000 burner starts,
