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Operation and Maintenance Manual - EN
18. Maintenance and cleaning of the burner
The system for burning wooden pellets is designed in such a way to require minimum maintenance.
The necessary degree of maintenance directly depends on the set power of the burner and quality of
used pellets.
CAUTION - Before starting repair or maintenance work during which you will handle
the burner always turn off the power supply with the main switch of the boiler or
disconnect to supply cable of the burner with the connector!
Regular removal of ashes:
Burning of wooden pellets leaves approximately 1 to 2 % of ashes. In practice you will gradually
find out how often the burner should be cleaned depending on the set power, intensity of heating and
quality of used fuel. Before the start of cleaning you must first shut down the burner and let the fuel
burn out, best by reducing the temperature on the control thermostat or by turning off the burner
switch on the boiler panel. The common interval of cleaning the burner mouth and boiler varies
in the range of 7 to 30 days (after burning of 300 to 1000 kg of high-quality pellets).
For this reason the basic version of ATMOS burner A85 is equipped with pneumatic cleaning
which cleanses the burner’s combustion chamber after every burn out or at regular intervals (factory
setting is 4 hours – parameter S42, S43). Thanks to pneumatic cleaning you can check or clean the
burner’s combustion chamber only once in a fortnight or a month.
Then remove ashes from the combustion space of the boiler and clean the heat exchanger of
the boiler (tube plate) as described in the boiler manual.
CAUTION - Always put ashes in a closed vessel. During the removal of ashes and cleaning
of the combustion chamber use means of personal protection (gloves and protective goggles).
Annual maintenance
At least once a year you must perform a complete check, maintenance and inspection of the
burner during which the burner must be removed from the boiler.
During this maintenance remove and wipe the photocell that senses the flame.
Thoroughly clean the space under the combustion chamber of the burner and behind the ignition
spiral. Disassemble the inlet pipe through which pellets fall to the burner and clean it.
Dismount the covering metal sheet of the burner mouth attached with one screw and clean the
space under it where pellets fall and burn (scrape off dust and deposits). Clean the opening
through which the photocell sees the flame.
Knock dust out of the flexible supply hose and visually check whether it is not perforated. In such
a case repair it or replace. On that occasion check the worm of the external conveyor by inspecting
58


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