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instructions. When igniting, do not fill the whole combustion chamber (ensure:
50% filling for wood, not more than 20% filling for coal).
3.3. Burning
During normal boiler operation monitor and periodically supplement the
fuel. In order to maintain stable temperature of supply water, it is necessary to:
use fuels with moisture contents of up to 30%
in case of higher moisture contents, dry the fuel beforehand or mix it with dry
fuel, keeping in mind that the higher is the moisture content of the mixture, the
lower is the dose and excess air
when using fuels with varying granulation, charge it alternatively
(fuel with large granule diameters or already glowing in the combustion
chamber shall be supplemented with finer fuel, e.g. saw dust – as if the sequence
is altered, the fine fuel would spill through the grate)
if possible, avoid opening the charging flap during ignition and
while the boiler temperature builds up
Note: avoid burning fine fuels, in which dusts concentration exceeds 5%..
Pay special attention when burning very dry sawdust (moisture content up
to 10%), do not compact them tightly in the combustion chamber. Having
charged sawdust, leave free space in the rear part of the chamber to ensure
air access. Failure to meet these requirements may result with gases from
combustion chamber backdrafting during sudden opening of the charging
flap. (When the charging flap is opened, this may cause sudden growth of
the air volume in the combustion chamber and explosive combustion of
dusts). When operating a boiler with air supply system, do not open the
charging flap while the fan is operating. Before supplementing the fuel,
switch off the controller.
Adjustment of the boiler performance, and thus the supply water
temperature shall be performed by modification of the throttle settings (or by
modifying the adjustable slot in ash pan doors) and potentially by changing
the cross-section of flue gas exhaust in the breeching. When operating a
boiler with air supply system, the ash pan flap shall remain closed.
