The Right Fuel; Regulating The Combustion Air; Primary Air; Secondary Air - HASE DELHI 124 Manuel D'utilisation

a
fig . 2
NOTE!
Make sure butterfly valve (Fig. 2) is open before
opening the fire box door during the burning
phase.
7.

The Right Fuel

Only fuels which generate low quantities of smoke may be bur-
ned in stoves. For your stove, natural, untreated logs, including
the adhering bark, can be used as fuel. Depending on the stove
model, charcoal briquettes can be used as well (see Operating
Instructions Part I).
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, treated, or plastic-
coated wood,
- wood treated with wood preservatives,
- household waste,
- paper briquettes (contains pollutants such
as cadmium, lead, zinc), or
- any flammable fluids (including methanol
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 ge-
nerates emissions that damage the environment
and are harmful to health.
Combustion of non-permitted fuels constitutes
a violation of the German Federal Immission
Control Act.
Improper fuels and their combustion residues
can be detrimental to the functioning and ser-
vice life of the stove and chimney.
8.

Regulating the Combustion Air

To effectively guide the required volume of air to the right
places, a customized air flow system has been developed for
your Hase stove.
When lighting the fire and adding fuel, you can use the primary
air and secondary slider to regulate the combustion air.

8.1 Primary Air

The primary air is guided through the grate and into the fire
box from below, which allows the stove to reach the required
fire box temperature more quickly during the warming up
phase.

8.2 Secondary Air

The secondary air is guided into the fire box from the top, via
air ducts in the stove. It supplies the fire box with the volume of
preheated oxygen necessary to completely burn off the wood
gas and reduces the build up of soot on the fire box windows.
For regulating the secondary air, the following general rule
applies: a small fire requires little secondary air; a large fire
requires ample secondary air.
WARNING!
If the secondary air slider is closed too tight-
ly, 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).
Burning wood when the primary air slider is
opened too wide poses the risk of overheating
the stove (forge fire effect).
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