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The fuel
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Wood pellet is made of sawdust, a byproduct from handling wood. Wood contains lignin that
makes the pellet hard without any glue or other binder used.
There are several different kinds of pellet on the market. The quality and energy can be
different between them. The diameter is 6-8mm, 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 9,9kWhr/kg and wood logs about 4,0kWhr/kg. Wood pellet has
4,7-5,0kWhr/kg in energy content. To maintain good combustion the pellets should be stored
in a dry place and be protected from dirt. Pellets are delivered in sacks with 10-15kg content
or in bulk by truck.
Effecta Komplett III can handle most of the different types of wood pellet that is between
6-8mm, but in UK only 6mm should be used. The quality should meet DIN+ standards. Good
pellet with small amount of dust and an even quality helps achieve 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.
The amount of pellets fed into the burner should be controlled every time the pellet brand or quality is
changed. If the deviation is more than 0,5kg/hour compared to the numbers in the "Warranty and Installa-
tion" paper, the burner should be tuned.
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The chimney
Inspection
We recommend that the local chimney sweeper inspect, give advice and guidance regarding
any necessary steps needed to be taken regarding the chimney and the boilers connection to
it. The detailed method of installation must be in accordance with building regulations.
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. 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. In
low power mode around 100-120ºC. 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 tempe-
rature 1 meter down from the top of the chimney. The temperature should be at least 80ºC at
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.
Effecta AB Västra Rågdalsvägen 21 434 99 Kungsbacka Sweden +46-300 - 22320 info@effecta.se
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