hergom ADDA 8 Instructions D'installation, De Service Et D'entretien page 15

6.0 Cleaning and maintenance
!
6.1. How to clean the combustion chamber (once a month)
Once you have cleaned the pipes, leave the scraper removed so that the removal of the indoor walls of the combustion
chamber will be easier.
Follow carefully the following cleaning instructions. Failure
to follow these instructions could create problems with the
operation of the stove.
Pict. 3