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Operation and maintenance manual - EN
If no problem has been found, reset the regulation AC07X by the RESTART command.
If the system is working, but you are not satisfied with its function, proceed as follows:
Check the quality of pellets
• Heating value - whether they are really pellets made of wood or whether something has been
added to them - crumble them and smell
• Colour - caking - white pellets do not cake, dark pellets or pellets with dark dots that contain bark
cake - in such a case the combustion chamber must be cleaned once a day!
If it is not enough to clean the combustion chamber once a day, the pellets contain chemicals which
do not allow pellets to be burned in the A25 burner (biologic waste). Replacement required.
• Dust in pellets - causes uneven operation of the burner and clogging of the burner hose
• Size - too small pellets - reduce the burner power (Ø 5 x 5 mm), long pellets do not fall freely to
the burner and clog the supply pipe.
Check the flue gas temperature
• It should be in the optimal range (150 ÷ 200 °С).
• If the temperature is too low, reduce the power of the burner (decrease parameter T4 and increase
T6) and reduce the quantity of combustion air or clean the boiler.
• If the temperature is too low, increase the power of the burner and quantity of combustion air
(increase parameter T4).
Check the level of pellets in the burner mouth
•
If it is too low and the burner goes out, check the flue gas temperature (see above). Reduce the
quantity of combustion air or increase the quantity of supplied pellets - increase the power (increase
parameter T4).
• If the pellet level in the burner mouth is too high and the burner exhibits poor combustion - produces
smoke, increase the quantity of combustion air or reduce the quantity of supplied pellets - reduce the
power (decrease parameter T4).
At the start check how long it takes for combustion quality to improve - how long smoke is released
from the chimney
• If smoke is released from the chimney at the start for more than 5 minutes, extend the time of
gradual increase to the nominal power (parameter T10, e.g. increase by 5min). Be careful about
the setting of the air flap.
The burner regularly does not ignite at the first attempt, but always at the second one
• Extend the time for the supply of ignition fuel (parameter T1 e.g. by 10 s), extend time T2 for
ignition of pellets (e.g. to 12 minutes) or reduce the angle of the conveyor (max. 45°).
If after stopping of the burner and its burning out a lot of glowing unburnt pellets remain in the
combustion chamber (mouth) of the burner
•
Extend the rundown time of the fan - parameter T5 (e.g. extend the time by 5 minutes) - never shorten
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