Manual Dovre 640 GM (page 29 of 48) (English, German, Dutch, French)

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640GM - 760GM 29 03.27602.000

4. Instructions for use

4.1. Fuel

The only suitable fuels for this stove are wood, brown coal briquettes and charcoal.

No other fuels are allowed to be burnt, as they can inflict serious damage to your

stove.

Do not burn any treated wood either, such as sc rap wood, dyed wood, impregnated

or preserved wood, plywood or chipboard. The fumes of these, as of synthetic mate-

rials, old papers and household waste, are highly polluting for both your stove and

your chimney, and for the environment. They also could cause chimney fires.

Wood

Hard woods, such as oak, birch- and fruit-trees, are the ideal fuels for your stove.

The wood must have dried for at least two years in a covered and well-ventilated

place. Split logs will dry faster. Dry wood should contain no more than twenty pe r-

cent moisture.

Wet logs are unsuitable for burning, as they do not produce enough heat and all of

the energy is lost in the process of evaporation. Moreover, the burning of wet wood

causes badly smelling gases to be released and a thick layer of tar will deposit on

the stove panels and in the chimney.

Brown coal briquettes

Brown coal briquettes burn in more or less the same way as wood does. You should

only burn briquettes on a bed of charcoal in your stove.

Charcoal

There are several categories of anthracite coal. Some characteristics may be legally

determined. For instance anthracite “A” has to contain less than 10% of volatile sub-

stances, anthracite “B” less than 12%. The ash content may range from 3 to 13%.

For a good operation of your appliance, the use of anthracite “A” with a low ash con-

tent is recommended. A combustible with a high ash content has a lower net heating

value. Moreover, the ashes have to be removed more frequently and the fire will go

out faster. The recommended calibre is 12/22 or 20/30.

4.2. Air supply adjustment

For the supply of combustion air, the appliance is pro-

vided with three air inlets at the back of the appli-

ance, one of which is adjustable by way of a handle at

the bottom of the front of the furnace. Through spe-

cial air vents, this secondary airflow (2) is conducted

to the top of the glass window. The primary air intake

is controlled by way of a the rmostat at the back. This

air intake regulates the amount of air that passes

through the grating (1). A sealable air intake at the

back of the combustion chamber (3) ensures a perfect

afterburning (only to be used for wood) (see images)

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Dovre 640 GM Manual

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