MCZ Club Guide d'installation télécharger pdf (Page 10)

2-FUEL

The instructions in this chapter refer explicitly to the Italian installation regulation UNI 10683. In any case, always observe the domestic

regulations in force.

PELLETS

Wood pellets are manufactured by hot-extruding compressed sawdust which is produced during the working of natural dried wood. The

compactness of the material is guaranteed by the lignin contained in the wood itself and allows pellets to be produced without glue or

binders.

The market oers dierent types of pellets with characteristics that vary according to the wood mixtures used. The most common

diameter on the market is 6 mm (although 8 mm diameter is available too) with a length, on average, of between 5 and 30 mm. A good

quality pellet has a density of between 600 and 750 or more kg/metres cubed and a water content that accounts for 5 to 8% of its weight.

Pellets have technical advantages besides being an ecological fuel, as the wood residue is used completely, thereby achieving cleaner

combustion than that of fossil fuels.

Good-quality wood has a caloric value of 4.4 kW/kg (15% moisture, after about 18 months of seasoning), whereas that of pellets is 4.9

kW/kg. To ensure good combustion, the pellets must be stored in a dry place and protected from dirt. Pellets are usually supplied in 15 kg

bags, therefore, storing them is very convenient.

Good quality pellets guarantee good combustion, thereby decreasing harmful emissions into the atmosphere.

The poorer the quality of the fuel, the more often the internal parts of the brazier and combustion chamber must

be cleaned.

The main quality certications for pellets currently available on the European market guarantee that the fuel complies with class A1/A2

according to ISO 17225-2. These certications include, for example, ENPlus, DINplus, Ö-Norm M7135, and in particular, guarantee the

following characteristics:

• caloric value: 4.6 ÷ 5.3 kWh/kg.

• Moisture content: ≤ 10% of the weight.

• Percentage of ash: max 1.2% of the weight (A1 less than 0.7%).

• Diameter: 6±1/8±1 mm.

• Length: ≤ 40 mm.

• Content: 100% untreated wood without the addition of binding substances (max 5% bark).

• Packaging: in sacks made from ecologically compatible or biologically decomposing material.

The company strongly recommends using certied fuel for its products (ENplus, DINplus, Ö-Norm M7135).

Poor quality pellets or others that do not comply with the characteristics specied previously may compromise the

operation of your product and can therefore render the guarantee and product liability invalid.

15 Kg BAG OF FUEL

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 75 76

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MCZ Club Guide d'installation Page 10