Regulating The Combustion Air; Primary Air; Secondary Air; Fuel Load Sizes And Thermal Output - HASE Ottawa Mode D'emploi

12. Regulating the Combustion Air

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

12.1 Primary Air

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

12.2 Secondary Air

The secondary air is guided into the fi re box from the top, via
air ducts in the stove. It supplies the fi re box with the volume
of preheated oxygen necessary to completely burn off the
wood gas and reduces the build up of soot on the fi re box
windows.
For regulating the secondary air, the following general rule
applies: a small fi re requires little secondary air; a large fi re
requires ample secondary air.
WARNING!
If the secondary air slider (Fig. 11/II) is closed
too tightly, there is a risk that the fl ue gases
will not burn completely (smouldering fi re),
that soot will build up on the fi re box window,
or that the amassed wood gases will burn
explosively (overfi ring/defl agration).
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Burning wood when the primary air slider
(Fig. 11/I) is opened too wide poses the risk of
overheating the stove (forge fi re effect).
CAUTION!
During operation, the secondary air slider
(Fig. 11/II) should never be completely closed.
In contrast, however, the fi re box door and ash
compartment must always be tightly shut.
Primary air slider (I) Primary air slider (I)
Secondary air slider (II) Secondary air slider (II)
fi g. 11

13. Fuel Load Sizes and Thermal Output

The thermal output depends on the amount of fuel you put in
the stove. When adding more fuel, please do not exceed the
maximum fuel load size of 2 kg. Exceeding the maximum fuel
load size leads to a danger of overheating, which can result in
damage to the stove and the risk of a stove fi re.
NOTE!
To attain a thermal output of approx. 6 kWm,
burn wood logs that weigh 1.4 kg and are no
longer than 25 cm in length for about 45 min.
(1.7 kg / 60 min. at browncoal briquettes)
NOTE!
To attain a thermal output of approx. 3.5 kWm,
burn wood logs that weigh 0.5 kg and are no
longer than 25 cm in length for about 35 min.
(0.8 kg / 60 min. at brown coal briquettes).
The Ottawa is intended for intermittent operation, please only
apply one fuel layer at a time.

14 . Initial Operation

NOTE!
During shipment, condensation moisture can
accumulate in the stove's interior, which may
possibly lead to the appearance of
condensation or water on the stove or fl ue
pipes. Please dry off these damp areas imme
diately.
The surface of your stove was treated in a sandblasting
machine before applying the colour coating. Despite careful
and thorough inspection, there may still be some residual
material in the stove body, which can fall out when your stove
is being installed.
NOTE!
To prevent any damage, please immediately
vacuum up these small steel pellets with a
vacuum cleaner.
The fi rst time a stove is operated, the heat development
causes the emission of volatile components from the coating,
sealing strips and lubricants, and smoke and odours can
occur.