Technical features and dimensions
1 3
Quality standards for
Unit of measurement
ÖNORM M 7135
DIN 51731
DIN plus
wood Pellet
Diameter
mm
from 4 to 10
from 4 to 10
from 4 to 10
Length
mm
5 x D
1
< 50
5 x D
1
Density
Kg/dm
3
> 1,12
1,0 – 1,4
>1,12
Humidity
%
< 10
< 12
< 10
Ash
%
< 0,50
< 1,50
< 0,50
Calorific value
kWh/kg
> 5
4.86 – 5.42
> 5
Sulphur
%
< 0,04
< 0,08
< 0,04
Nitrogen
%
< 0,3
< 0,3
< 0,3
Chlorine
%
< 0,02
< 0,03
< 0,02
Dusts
% weight
< 2,3
-
< 2,3
Bonding agents
% of pressed mass
< 2
2
< 2
1
No more than 20% of the pellets can be 7.5 times longer than the diameter D.
2
DIN prohibits use of any added substance. However this prohibition is not valid for small heating systems.
The standard DINplus proposes the combination of quality parameters proposed by the standard DIN 51731 and by the
Austrian standard ÖNorm M 7135.
The pellet, as foreseen by current Italian
legislation governing commodity features of
fuels (DPCM 2.10.1995), must be produced
exclusively with untreated wood sawdust
without other materials added.
It is absolutely forbidden to use any solid or
liquid fuel other than pellets to feed STILE
27.
For best operation of STILE 27, it is
recommended to use pellets the quality of which
is certified by an authorised body. The use of poor
quality pellets can cause STILE 27
malfunctioning and shall terminate the warranty.
Storage and handling of pellets are important operations to
be performed with care:
-
The fuel must be stored in a dry place which is not cold;
-
Pellets must be moved in such a way to avoid breaking
them up into small powder.
Compliance with these two simple rules provides better
combustion efficiency and conserves the moving mechanical
parts of the appliance.
If STILE 27 remains unlit for long periods
(more than seven days), the tank must be
emptied from residual fuel to keep it from
becoming excessively moist which could
cause the appliance to malfunction.
A high moisture content in the pellet can cause
it to break up into powder generating greater
accumulation of residue in the brazier and
blocking the fuel feed system (screw).
Содержание STILE 27
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