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4
FUEL
4.1
PELLET FUEL CHARACTERISTICS
d
It is forbidden to use any fuel other than pellets.
d
DO NOT USE pellets with different dimensions to
those specified by the manufacturer.
There are various types of pellets available on the market with differ-
ent characteristics and varying levels of quality depending on the type
of wood used and the production process adopted.
Since the characteristics and quality of the pellets significantly in-
fluence the product's autonomy, performance and correct operation,
the manufacturer recommends using certified pellets conforming to
Class 1 requirements (EN 17225-2).
The pellets must have the following dimensional and performance
properties:
Raw material of origin
Maximum length
Diameter
Maximum humidity content
Maximum ash residue
a
The use of poor-quality pellets or any other material
can damage the appliance's operation and void the
warranty, resulting in the manufacturer being ex-
empted from all liability.
l
If the size and heating capacity of the pellets differ
from those recommended, it could be necessary to
modify the product's operating parameters.
The alteration of the operating parameters (where
■
applicable) MUST be entrusted to qualified and au-
thorised personnel.
d
DO NOT USE pellets with a high degree of humidity.
DO NOT USE deteriorated and poorly stored pellets
■
that contain sawdust, resins, chemical and plastic
substances, additives or binders.
8
Pure natural wood pellets
35 mm
6 mm
8÷9 %
1,1 %
4.2
WOOD FUEL CHARACTERISTICS
d
It is forbidden to use any fuel other than wood.
DO NOT USE wood that has is very humid, wet or sea-
■
soned for less than 2 years.
DO NOT USE wood with a high resin content as this
■
may shorten the appliance working life and require
more frequent cleaning of the flue and of the appli-
ance.
Since the characteristics and quality of the wood considerably influ-
ence product autonomy, yield and proper operation, the manufacturer
suggests using well seasoned (at least 2 years) and dry wood, with
humidity between 10÷15%.
Wood is divided into softwood (e.g. fir, pine, poplar, alder, chestnut,
willow) and hardwood (beech, ash, hornbeam, locust and oak). Soft-
wood ignites easily, burns quickly and has a long flame. Hardwood
is more compact and burns more slowly with a short flame; it lasts
longer and is more suitable for domestic heating systems.
Depending on the calorific value of the wood, its composition and
consistency, and the flame duration, wood to burn can be classified
into two categories: "good quality" and "poor quality".
Good-quality fuel
The following hardwoods are regarded as suitable: beech, ash, horn-
beam, oak, locust, birch, maple and elm.
Poor-quality fuel
The following softwoods should not be used: willow, poplar and alder.
a
The use of poor-quality wood or any other material
can damage the appliance functions and void the
warranty, resulting in the manufacturer being ex-
empted from all liability.
Indicative values referred to wood with uniform density and a residual
humidity percentage between 10% and 15%
Type of wood
White fir
Red fir
Maple
Birch
Hop-hornbeam
Chestnut
Turkey oak
Cypress
Beech
Ash
Larch
European alder
Cypress poplar
Locust
Downy oak
GENERAL INFORMATION
Calorific value
Specific weight
(kcal/kg)
(kg/m
)
3
4650
440
4857
450
4607
740
4968
650
4640
820
4599
580
4648
900
5920
620
4617
750
5350
720
4050
660
4700
530
4130
500
4500
790
4631
880
CS.DLA.IST_EN_Rev. 1.0_11-23
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