Ariterm Biomatic plus 50, Installation, Operation And Maintenance Manual

ARITERM SWEDEN AB

Installation, Operation & Maintenance - 

2009.02.18- 22/32

Pellet fuel can be manufactured from several different biologically derived raw materi-

als. Most common is wood, but today there are several alternative materials available 

on the market that are suitable for pellets manufacture.  

These raw materials have various characteristics that can be advantageous or disadvan-

tageous 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 recom-

mend that you choose the fuel that has the lowest cost per energy unit after checking 

how the fuel performs 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. The formation of sintered ash is due to silicate contami-

nants (sand). Theses 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. 

ADVICE ABOUT FUEL PELLETS

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

This boiler manufactured by Ariterm AB is guaranteed to be free of defects in work-

manship and materials for a period of 24 months (2 years) from the date of installa-

tion. The manufacturer shall not be held liable for faults caused by incorrect installa-

tion, incorrect use, freezing, over-temperature or over-pressure. Any attempts made 

to repair the product without the manufacturer’s permission or if the guarantee card 

has not been returned to the manufacturer, will invalidate the guarantee. The manu-

facturer shall not be held liable for any possible indirect damage and/or financial loss 

caused by the burner.

Ariterm AB reserves the right to decide the method how a possible guarantee repair is 

carried out. Ariterm AB is not liable for damages occurred after the expiration of the 

guarantee period, but compensation for such incidents may be agreed upon separately 

case by case.

 Storage planning

When planning the pellet store you should keep in mind that you cannot use the 

same feeding system for a store designed for a day’s or a week’s supply as for a store 

designed for bulk deliveries. A common way is to start with a small and simple pellet 

store which is a quick and simple solution. It demands a bit of handling however, both 

when you pick up the pellets from your supplier and when you fill them into your 

store. For this kind of store, pellets can be acquired in small sacks (normally between 

6-20 kg) or large sacks (normally between 500-1000 kg). 

The very best solution for a convenient and simple handling of pellets however is  

to install a pellet store designed to accommodate pellets delivered by bulk tanker. This 

delivery method will demand a store of some 6 m

3

 to accommodate 3 tons which is 

the normal volume at bulk deliveries.

The pellet store should be designed to eliminate the risk of contamination and 

moisture penetration. Take special care to avoid damp penetration through the walls 

and floor. It is also important that pellets are not exposed to direct contact with water 

in the form of rain or condensation. Pellets do not however absorb moisture from 

surrounding moist air and can therefore be stored outdoors as long as they are under 

cover. The fuel store should be planned according to your estimated consumption so 

that refilling and handling takes place at convenient intervals.

GUARANTEE / STORAGE PLANNING