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Regular cleaning
8 Regular cleaning
End heating mode, perform ember burnout
During the last heating mode, press the [Ember
burnout] button in the boiler overview (the button is
then displayed in yellow ). Ember retention is then
deactivated and the boiler performs a complete ember
burnout (duration approx. 1 hour). The majority of the
charcoal burns in the fuel chamber.
Only start the maintenance when the boiler has
cooled down sufficiently.
Checking the heating system's water pressure
In buildings with up to three storeys, the optimum
water pressure in a cold heating system is between 1
and 2 bar. For a warm heating system, the optimum
water pressure is between 1.5 and 2.5 bar.
Fig. 8-1: Pressure gauge
If the water pressure is too low, fill the cold
heating system to approx. 2 bar. Do not fill to a
higher pressure, because water expands as the
temperature rises and the water pressure also rises in
heating mode. The safety valve triggers at approx. 2.8
bar.
If the water pressure drops several times a year,
contact a heating professional. When refilling
water in the heating system, the same water as used
during initial filling should be used whenever possible
(e.g. treated water).
Actuate cleaning lever
Close the insulation door and clean the heat
exchanger by repeated movement (10 x) of the
cleaning lever on the side.
Fig. 8-2: Cleaning lever
This step is omitted if the optional automatic heat
exchanger cleaner is mounted on the boiler.
De-ash boiler
The ash in the fuel chamber is needed as
insulation for ember retention. Therefore, leave a
layer of ash approximately 3cm thick in the fuel
chamber. Only rake the excess ash in the primary
combustion chamber. Some pieces of charcoal will
drop into the primary combustion chamber during this
process; these are best left there. The charcoal will
burn during the next combustion cycle and the ash will
protect the bottom of the combustion chamber against
premature wear.
Fig. 8-3: Rake the excess ash and pieces of charcoal into the
primary combustion chamber.
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