The Right Fuel; The Combustion Process; Drying Phase; Degasification Phase - HASE SENDAI PRO 165 Mode D'emploi

The secondary air flow may not be
completely closed while the stove is in
operation. If there is not a sufficient air
supply, there is a risk that the flue gases will
not burn completely (smouldering fire), that
soot will build up on the fire box window,
or that the amassed wood gases will burn
explosively (overfiring/deflagration).
NOTE!
When the stove is not in use, the airflow
slider(s) should remain completely closed
to avoid heat loss due to the unintentional
throughflow of cold air.

9. The Right Fuel

Only fuels which generate low quantities of smoke may
be burned in stoves. For your stove, natural, untreated
logs, including the adhering bark:
You can also fuel with wood briquettes as specifi ed in
DIN EN ISO 17225 or of equal quality. Please note that
wood briquettes swell and expand during combustion.
As compared to the amount of fuel when using logs,
reduce the amount by ap-prox. 10-20% based on the
calorifi c value of the wood briquettes. The control
element settings and procedure are the same as when
burning logs:
Depending on the stove model, charcoal briquettes
can be used as well (see Operating Instructions Part I).
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For the most attractive stove fire, use beech wood
logs. If other types of wood are used, such as oak,
birch, pine or larch, we recommend adding beech
wood for picturesque dancing flames. Brushwood
and small pieces of wood are good kindling materials.
Highly resinous coniferous wood (e.g. spruce, pine,
fir) tends to emit flying sparks and leaves behind a
fine layer of flue ash that can swirl up when the fire
box door is opened.
The firewood should be stored for at least two years
to achieve the required maximum residual moisture
content of 20 %.
CAUTION!
If the wood used as fuel is too moist, water
vapour can condense and damage the
stove. In addition, it will reduce the thermal
output.
CAUTION!
Burning, e.g.:
- damp or moist wood (residual moisture
content over 20 %),
- varnished, laminated,
plastic-coated wood,
- wood treated with wood preservatives,
- household waste,
- paper briquettes (contains pollutants
such as cadmium, lead, zinc), or
- any flammable fluids (including metha-
nol and ethanol) as well as any fuel
pastes or gels is not permitted.
ENVIRONMENT!
Combustion of the materials listed above
not only gives off unpleasant odours, but
also generates emissions that damage the
environment and are harmful to health.
Combustion
constitutes a violation of the German
Federal Immission Control Act.
Improper fuels and their combustion
residues can be detrimental to the
functioning and service life of the stove and
chimney.

10. The Combustion Process

A piece of wood burns in three phases. In a wood fire,
however, these processes occur both consecutively
and simultaneously.

10.1 Drying Phase

The moisture still remaining in the air-dried wood
(approx. 15-20%) is evaporated. This takes place at
temperatures of approx. 100°C. For the evaporation
treated, or to occur, the wood must be supplied with heat during
the warming up phase; this is achieved by using small
wood logs.

10.2 Degasification Phase

At temperatures between 100°C and 150°C, the
contents of the wood start - slowly at first – to
disintegrate and gasify and the wood begins its
thermal decomposition. At temperatures above
150°C, the gas development accelerates. The
proportion of volatile components makes up around
80% of the wood substance. The actual combustion
of non-permitted fuels