Drying And Storage; Regulating The Combustion Air - RAIS/attika VISIO 3-1 NS Manuel D'utilisateur

English
The calorific value of the firewood is closely connected to the moisture level of the fire-
wood. Moist firewood has a low heat value. The more water the wood contains, the
more energy is used to evaporate it and this energy is wasted.
ONLY USE RECOMMENDED FUELS
The following table shows the calorific value of different types of wood which have
been stored for 2 years and have a residual moisture content of 15-17%.
Wood
Hornbeam
Beech and oak
Ash
Maple 540 93%
Birch
Mountain pine
Fir
Poplar
1 kg of wood yields the same heat energy irrespective of wood type.
1 kg beech merely takes up less space than 1 kg of fir.

Drying and storage

Drying wood takes time. Proper air drying takes approx. 2 years.
Here are some tips:
• Store the wood sawn, split and stacked in an airy, sunny place, which is protected
against rain (the south side of the house is particularly suitable).
• Store firewood stacks at a hand's breadth apart, as this ensures that the air flowing
through takes the moisture with it.
• Avoid covering the firewood stacks with plastic, as this prevents the moisture from
escaping.
• It is a good idea to bring the firewood into the house 2-3 days before you need it.

Regulating the combustion air

All RAIS/attika stoves are equipped with a one-handed operating lever for regulating
the damper.
The stove-specific regulating mechanisms can be seen in the diagrams at the front of
the manual.
The primary air is combustion air that is added to the primary combustion zone at the
bottom of the burning chamber, i.e. the bed of glowing embers. This cold air is only
used in the lighting stage.
Secondary air is the air that is added in the gas combustion zone, i.e. air that contrib-
utes to the combustion of the pyrolysis gasses (preheated air used for cleaning the glass
and combustion). This air is sucked through the damper and preheated via channels in
the side/back of the stove and then emitted as hot scavenging air onto the glass. The
hot air rinses the glass and keeps it soot-free.
24 24
Kg dry wood, pr. m
640 110%
580
570
510
480
390
380 65%
attika
RAIS/ - User manual for VISIO 3-1
compared to beech/oak
3
100%
98%
88%
83%
67%