Emptying The Ash Drawer; The Combustion Process; Drying Phase; Degasifi Cation Phase - HASE Olbia Mode D'emploi

Heating with Wood at Low Thermal Output
Procedure
Close primary air Push in primary air slider (I)
as far as it will go. (fi g. 9)
Adjust secondary air.
Set secondary air slider (II)
to position 2. (fi g. 9)
Close fi re grate. Push in fi re grate slider.
Add two logs (weighing
approx. 0.5 kg total) into
the middle of the fi re box.
Tab. 4
Heating with Briquettes at Low Thermal Output
Procedure
Adjust primary air. Set primary air slider (I) between
position 1 and 2. (fi g. 10)
Adjust secondary air.
Set secondary air slider (II)
to position 1. (fi g. 10)
Place 1 briquettes
on the fi re grate.
Open fi re grate. Pull out fi re grate slider.
Tab. 5
60
Position of
(I)
Control Elements
Fig. 9
(I)
Fig. 10
Position of
Control Elements

18. Emptying the Ash Drawer

As a safety precaution, please make sure to wait until the
ashes are cold before you dispose of them. While the ash
collects during the fi re, the lid is located under the ash drawer.
Remove both the ash drawer and the lid located underneath
it. Slide the lid onto the ash drawer so that it is closed; this
prevents ashes from fl ying around, which in turn means your
home stays clean. To place the ash drawer back into the stove,
proceed in the reverse order.
CAUTION!
Piled up ashes can impair or even block the
supply of primary air supply to the stove.
(II)
Please ensure that the air supply path for the
primary air between the ash drawer and the
bottom of the ash compartment remains clear.

19. The Combustion Process

EA piece of wood burns in three phases. In a wood fi re,
however, these processes occur both consecutively and
simultaneously.
(II)

19.1 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 to occur, the wood must
be supplied with heat during the warming up phase; this is
achieved by using small wood logs.
19.2 Degasifi cation Phase
At temperatures between 100°C and 150°C, the contents of
the wood start - slowly at fi rst – to disintegrate and gasify and
the wood begins its thermal decomposition. At tempera-
tures above 150°C, the gas development accelerates. The
proportion of volatile components makes up around 80%
of the wood substance. The actual combustion begins at a
temperature of about 225°C (ignition temperature) with the
ignition of the resultant gases and the release of heat. There
must be an adequate supply of oxygen available for this
purpose. The peak of the combustion process is reached at
approx. 300°C. The reaction process is now so rapid that the
largest amount of heat is released at this point; fl ames can
reach temperatures of up to 1100°C.