GB
6
CHOOSING FUEL
All types of wood, such as birch, beech, oak, elm, ash,
conifers and fruit trees can be used as fuel in the insert.
Different types of trees have different densities, the
greater the density of the wood the greater the energy
value. Oak, beech and birch have the highest density.
The wood’s moisture content Fresh wood is about 50
per cent water. Some of the water circulates freely
between the fibres and some of the water is bound in
the cells.
The wood must always be dried so that the free wa-
ter evaporates. The timber is ready for use when the
moisture content has fallen below 20 %. If wood with a
higher moisture content is lit, a large part of the energy
content of the wood is used boiling off the water. If
the wood is damp, the combustion is also poor, layers
of soot and tar build up in the chimney and could, at
worst, lead to a chimney fire. In addition, it causes the
glass of the insert to soot and may cause discomfort to
those living nearby.
To ensure thoroughly dry wood, the wood should be cut
in the winter and stored, well aired, under a roof. Never
cover the wood pile with a tarpaulin to the ground. The
tarpaulin will then act as a sealed
cover and the wood will be pre-
vented from drying.
Always store a small amount of
wood indoors for several days
before use, so that the surface
moisture has time to evaporate.
Do NOT burn the following
Under no circumstances may
pressure impregnated wood,
painted or glued wood, chip-
board, plastic or colour brochu-
res be used as fuel in a hearth.
All these materials can create hydrochloric acid and
heavy metals that are damaging both to the environ-
ment and the hearth. Hydrochloric acid can also attack
the steel in the chimney or the mortar in a stone built
chimney.
Also avoid using bark, woodchips or other extremely fi
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nely chopped wood except for lighting. Fuel of this type
causes flashover resulting in too high output.
NOT TOO BIG FIRES
The firebox in your insert is relatively large. This is so that boi
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ler wood can be burned. It is, however, prohibited to load it full
of wood. Adding more logs than recommended leads to flasho
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ver with oxygen deficiency, which results in: sooted glass, too
high an energy output that can damage the inserts/surround,
thick smoke and high flue gas temperatures that can damage
the chimney. Recommended amount of wood for normal
lighting is 2.5 kg/ hour and the maximum permitted amount of
wood is 4 kg/ hour, max 3 kg of wood per insertion and covers
lighting with a maximum of 3 pieces of chopped birchwood per
insertion or other broad leaf wood with a moisture content of
about 18%. When inserting one or two large pieces of wood,
the weight of the wood can be increased to 4 kg without the
risk of the combustion rate exceeding 4 kg/hour. When lighting
with the same wood amounts as above but with, for example,
conifer wood, higher fireplace temperatures are achieved. The
service life of the fireplace can be cut short if the fire is left at
full combustion for long periods, and if the maximum permitted
amount of wood is exceeded, parts in the stove can become
damaged thus annulling the warranty.
HEARTH MAINTENANCE
The glass may be come sooty with use, even if the insert is lit with dry wood with a moisture content of 15 –
20%. Regular cleaning with dry paper is usually sufficient to keep it clean. If the soot has been on the glass
for a prolonged period use a cleaning agent or a special soot removal agent to remove it. Such agents can be
purchased from regular hardware stores or from your local stove dealer. Never use cleaning agents that contain
any abrasives, these can damage the glass. When emptying the ash-pan, ensure that there are no glowing em-
bers. Lift the grate using the supplied handle and fold it back (see the illustration below). The ash-pan can then
be lifted straight up. The ash must be stored in a fireproof container with a lid for at least 24 hours before being
disposed of. The grate and other cast iron components can be cleaned using a wirebrush. It is important from a
combustion point of view to check gaskets, as worn gaskets hinder combustion when the fireplace draws ”extra
air”. Painted parts on the insert can be cleaned using a damp cloth, with a small amount of detergent, if neces-
sary. Damage to painted parts, e.g. small scratches, can be rectified with touch-up paint. Contact your dealer.
As there is a constant large flow of air through the Insert’s surround, cold room air is drawn in and hot air relea
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sed, dust can collect in the surround’s air intakes. Therefore, these should be regularly cleaned. Parts located
near the actual seat of the fire may require replacing. Examples of such parts are the hearth surround
and grate. The service life of these parts depends on how much and how the insert is used.