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Effecta AB Västra Rågdalsvägen 21 434 99 Kungsbacka 46-300 - 22320 [email protected]
Wood pellet is made by sawdust, a byproduct from from handling woods. Wood contains lignin
that makes the pellet hard without any glue or other binder used.
On the market there are several different kinds of pellet. The quality and energy can be different
between them. The diameter is 6 or 8mm, the normal length is between 5 and 30mm. Pellet with
high quality has a density of 600-750 kg/m3. The moist content is 5-9% in weight.
Oil has an energy content of 9,9kW/kg and wood logs about 4,0kW/kg. Wood pellet has 4,7-
5,0kW/kg in energy content. To maintain a good combustion the pellet should be stored in a
dry place and be protected from dirt. Pellet is delivered in sacks with 16kg content or in bulk by
truck.
Effecta Complete can handle most of the different types of wood pellet that is 6-8mm. The quality
should meet european standards. Good pellet with small amount of dust and an even quality
helps to reach good combustion, less maintenance of the product and also less environmentally
harmful emissions.
The worse quality of the fuel, the more cleaning and maintenance of the product.
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The fuel
The amount of pellet fed into the burner should be controlled every time the pellet brand or quality is chan-
ged. If the deviation is more than 0,5kg/hour compared to the numbers in the ”Warranty and Installation”
paper, the burner should be tuned.
Inspection
We recommend that the local chimney sweeper inspect and give advices and guidances regar-
ding any necessary steps needed to be taken regarding the chimney and the boilers connection
to it. Some issues needed to be considered:
Dimensions
Suitable dimensions are from about ca Ø120 to Ø160 mm for a steel construction and about
140x140 mm for a bricked. The length of the chimney should be so that a draft of 15-20 Pa is
reached during operation.
A much larger/smaller flue might be needed to be adjusted to receive a proper draft. If a new
installation of the flue is done, the chimney manufacturer can give advice regarding the dimen-
sioning. Generally speaking, a flue used for burning oil works for firing pellet in the same power
range. The draft stabiliser attached to the flue tube should always be used if nothing else is stated
from Effecta.
The flue gas temperature should be checked.
The temperature in the flue directly after the boiler in the flue should be about 160 - 200ºC.
With a tall and big chimney there is a risk of condensation which can lead to corrosion and/or
frost damages. To control this you can check the temperature 1 meter down from the top of the
chimney. The temperature should be at least 80ºC in the end of a burning session. Suggestions
for actions to be taken if needed is e.g. insulate the chimney or mount a steel pipe inside the
chimney. This will increase the temperature in the flues without effecting the efficeny of the boiler.
Other actions are increasing the power output of the burner or removing/cutting off turbulators.
This will however decrease the burners efficency some. The draft stabiliser helps keeping the
chimney free from condensation by ventilating it.
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The chimney
