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Maintenance
in the case of light dirt build-up
Carry out wet cleaning of the combustion chamber and
the aluFer
®
pipes.
• Ensure that each individual aluFer
®
pipe is thoroughly
rinsed. After completing cleaning, check that the indi-
vidual fl ow ducts are free of deposits and combustion
residue!
in the case of heavy dirt build-up
Carry out mechanical wet cleaning of the combustion
chamber and the aluFer
®
pipes after spraying them with
concentrated cleaning agent.
• Allow the concentrate to soak in for at least 10 minutes
before cleaning.
• Using the cleaning scraper, thoroughly clean the fl ow
channels.
• A special cleaning set (contains four cleaning scrap-
ers) to remove stubborn dirt build-up is available from
Hoval, Art. No. 6022 844.
• Before removing the drain hose, all dirt particles must
be adequately rinsed out of the condensate drip tray.
Do not use wire brushes or any sharp objects for
cleaning. Ensure that the combustion chamber
does not come into contact with iron, as this may
cause corrosion. Care must be taken that stainless
steel surfaces are not scratched or damaged in any
way.
The only cleaning concentrates permitted
are those approved for oil boilers having
aluminium components such as Sotin 240
or Desoxin.
When working with the above cleaning
agents, regulations prescribe the wear-
ing of gloves and protective goggles. In
addition, the instructions on the original
packaging must be observed.
Cleaning scraper
Flow duct
aluFer
®
pipe
Leakage testing
After cleaning or at least every fi ve years, the sealing be-
tween the combustion chamber and the condensate drip
tray must be checked for leakage. This can be done by
fi lling the boiler with water.
80
1
1
Filling level water
6.3 Cleaning the combustion chamber
and the aluFer
®
pipes
