ARITERM SWEDEN AB Installation, Operation and Maintenance - 2007.10.26- 9/12
ADVICE ABOUT FUEL PELLETS
• Pellet fuel can be manufactured from several different biologically derived raw
materials. Most common is wood, but today there are several alternative materials
available on the market that are suitable for pellets manufacture.
ese raw materials have various characteristics that can be advantageous or disad-
vantageous for pelletised fuel.
Important factors that can be assessed are energy content, size, amount of fines,
moisture content and, last but not least, the price. We recommend that you choose
the fuel that has the lowest cost per energy unit after checking how the fuel per-
forms in the burner. Study carefully the fuel performance after new delivery.
In case of doubt, please contact us at Ariterm.
• Most of the problems that arise on account of inferior fuel quality are the result of
inadequate handling and storage before the fuel reaches the end customer.
If the fuel has high fines content the problem is usually due to separation
during storage or loading.
e formation of sintered ash is due to silicate contaminants (sand). eses
cannot be discovered before they are used. If you get pellets that produce
sintered ash, a claim must immediately be sent to the pellet supplier.
ATTENTION! If sintered ash is formed, the burn pot must be continuously
cleaned of sintered material (with a table spoon for example).
• Damp pellets can be the result of inadequate handling and transport.
If possible, inspect the pellets before they are unloaded to make sure that
you get clean and dry pellets and no fines.
ATTENTION! Damp pellets must be rejected immediately.
FUEL RECOMMENDATION
Raw material Chemically untreated barkless wood
Diameter 8 mm
Length 15 to 32 mm
Volume weight over 600 kg/m3
Moisture content less than 10 %
Ash content less than 0.7 weight %
Fine material content max 4 weight %
Melting temperature of ash >1100 °C
Energy content >4,75 kWh/kg
PELLET STORE
anks to the pellet feed system the pellet store can be built for bulk deliveries.
e store can either be located inside the house or in a separate building.
Pellets must, however, never be exposed to moisture.
Data for flexible feed system:
Maximum climb: 2,5 m
Maximum gradient: 45˚
Outside pipe diameter: 75 mm
Attention! The pellet store can have a maximum of 3 intake openings, and only one intake
can be used at a time.
e store shall be well sealed to avoid the spreading of dust. As a guide when determi-
ning the size of the store, it may be useful to know that the minimum bulk delivery is
normally 3 tons if you wish to avoid freight surcharge. 1 ton of pellets corresponds to
about 1,6 m3. To accommodate 3 tons of pellets you would need a store of at least 6
m3to have some space to spare.
Inspection hatch
600 x 600 mm
Store pipe (delivered by Ariterm),
see previous page. The whole length
of the store pipe shall be supported.
2 x horizontal
studs 45x95 mm
50˚
80 mm
Bulk lling pipe
Ø 100 mm
Vent pipe Ø 200 mm
Attention!
If lter sack is used
for lling we
recommend
2 x Ø 200 mm
Vertical studs
95x45 mm
c/c 600 mm
Slippery plywood
board 16 mm Horizontal stud
45x95 mm
Stud 45x95 mm
c/c 600 mm
e drawing represents a stand alone pellet storage bin. If the store is built
against a supporting wall, the sloping studs will have to be arranged differently.
