4
Fuel properties
The furnace is first characterized by the fact that it burns natural fuel (wood pellets), which is environmentally derived
from the wood industry waste (chips/sawdust). Once shavings and sawdust are properly cleaned and dried, which arise in
the wood processing procedures, they are compressed under extremely high pressure to produce small cylinders of pure
wood: pellets. Each tiny cylinder may vary in length and width from 1 to 3 cm in length and from 6 to 8 mm in radius.
Wood pellets are primarily characterized by low humidity (below 12%) and high density (= 600 kg/m3), as well as their
uniformity and compactness, providing this type of fuel with high calorific value features (DTV 4100
5000 kcal/kg).
Wood pellets which are used as fuel for this furnace must have excellent quality characteristics, such as, for example,
those defined by the following standards: DIN 51731, ÖNORM M 7135 and EN plus A1, with basic numeric items listed below
⚠
ATTENTION: As is required by the relevant European laws governing the characteristics of commercial fuels, pellets
must be manufactured exclusively using shavings of unprocessed wood without added matter.
s is strictly prohibited.
⚠
ATTENTION: In order to bring furnace operation to the highest level, the use of wood pellets certified by an accredited
body is recommended. Using other types of pellets compared to those specified by the manufacturer can lead to failure of
the furnace and may void the warranty.
Quality standards for
wood pellets
Unit of measure
ÖNORM M 7135
DIN 51731
DIN plus
EN plus A1
Diameter
mm
from 4 to 10
from 4 to 10
from 4 do 10
6 ± 1
Length
mm
5 x P
1
< 50
5 x P
1
3,75<D<40
3
Density
Kg/dm
3
> 1.12
1.0 – 1.4
> 1.12
>0.6 (average)
mass volume)*
Humidity
%
< 10
< 12
< 10
< 10
Ash
%
< 0.50
< 1.50
< 0.50
< 0.50
Thermal power
kWh/kg
> 5
4.86 – 5.42
> 5
> 4.5
Sulfur
%
< 0.04
< 0.08
< 0.04
< 0.05
Nitrogen
%
< 0.3
< 0.3
< 0.3
< 0.3
Chlorine
%
< 0.02
< 0.03
< 0.02
< 0.02
Dust
% weight
< 2.3
-
< 2.3
< 1
Binders
%
pressed
mass
< 2
2
< 2
1
A maximum of 20% of pellets may have a length 7.5 times larger than the diameter D
2
DIN prohibits the use of any added substances. However, this prohibition does not apply to small heating systems.
3
Up to 5% of pellets may have a length greater than 40 mm, and a maximum of 45 mm.
⚠
ATTENTION: If the appliance is not used for a sufficiently long period of time (more than two weeks), all remaining
pellets should be removed from the tank to prevent it from becoming too wet as this can lead to failure of the product.
Storage and handling of wood pellets are important tasks which must be done carefully.
-
Fuel must be stored in a dry and warm place.
-
Pellets must be handled as to prevent too many crushed pellets that become fine powder.
Compliance with these two simple rules will allow better combustion efficiency and will even help maintain proper
operation of moving mechanical parts of the appliance.
Safety recommendations
⚠
ATTENTION: Carefully read the attached user guide with the instructions before installing.
⚠
ATTENTION: The firebox must be empty before the appliance is turned on in case
of any difficulty when turning the device on.
It is strictly prohibited to use any other type of solid or liquid fuel except wood pellets with a radius of 6 mm for which
the furnace is designed. Avoid using wet or crushed pellets.
In order to bring furnace operation to the highest level, the use of wood pellets certified by an accredited body is
recommended. Using other types of pellets compared to those specified by the manufacturer can lead to failure of the
furnace and may void the warranty.
Содержание LUCA 12
Страница 5: ...2 Dimensional features...
