6
TECHNICAL PASSPORT, INSTALLATION AND MAINTENANCE MANUAL
2.3
Fuel
The boiler is designed to be used with a pellet burner which consumes 6–8 mm wood pellets. The table
below shows the requirements for the pellet quality. Using fuel that meets DIN 51731 or DIN PLUS or
adheres to EN-14961-2 norms, extends the pellet burner’s lifecycle. The pellet storage room must be
dry and well ventilated. It is important that before filling the fuel container with pellets, their
temperature is equal to the temperature of the boiler room.
Pellet quality requirements.
Wood pellets
Unit of
measurement
NORM
Quality criteria
DIN plus
DIN 51731
Diameter
mm
4≤d<10(6)
4≤d<10(6)
Length
mm
5 x D(3)
<50
Density
kg/dm³
1,12
1,0-1,4
Ash content
%
<0,5(1);(7)
<1,50
Humidity
%
<10
<12
Humidity upon delivery
%
Not specified
Not specified
Calorific value
MJ/kg
>18(1)
17,5 – 19,5 (2)
Sulphur
%
<0,04(1)
<0,08
Nitrogen
%
<0,3(1)
<0,3
Chlorine
%
<0,02(1)
<0,03
Dust collected
%
<2,3
-
Compression
facilitators
%
<2(8)
(4)
Ash melting point
-
Not specified
Not specified
Arsenic
mg/kg
<0,08
<0,08
Lead
mg/kg
<10
<10
Cadmium
mg/kg
<0,5
<0,5
Chromium
mg/kg
<8
<8
Copper
mg/kg
<5
<5
Quicksilver
mg/kg
<0,05
<0,05
Zinc
mg/kg
<100
<100
Halogens
mg/kg
<3
<3
(1)
Dry weight
(2)
Without water and dust
(3)
Not more than 20% of pellets which length 7,5 greater than diameter
(4)
DIN prohibits the use of accessories. This does not apply to small heating
systems
(5)
Manufacturer’s
warehouse
(6)
Diameter tolerance ± 10 %
(7)
Dust levels of up to 0.8% are allowed, which may be naturally higher for
certain types of wood
(8)
Only natural additives from biomass are allowed
For more detailed information please refer to the pellet burner manual (attached)
