Yrittäjäntie 14, FI-27230 Lapland • phone +358 207 416 740 • fax +358 207 416 743 • www.narvi.fi
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GB
3. Heating
3.1 First heating
Once the sauna heater has been installed, do the first heat-
ing which must be done with half capacity and thereaf-
ter allow the sauna heater to cool, so that the bricks and
stones settle down. The first heating also removes any
possible humidity from the bricks, which might increase
the heating time of the sauna heater. If the upper stones do
not become evenly hot, add small stones to the hot spots
to get an even draught in the whole upper surface of the
stone compartment.
3.2 Heating
Open the ash drawer 5 cm.
See that sufficient volume of
combustion air enters in the sauna either from the valve or
through the door.
To ensure correct travel path of smoke, open the valve in
front of the closing plan, open the closing pan and close
the valve in front of the closing pan as shown on the above
drawing. Check that the flue is open.
The heating time depends significantly on the wood qual-
ity. The fastest method to heat the sauna heater to the tem-
perature suitable for steam procedures is to use finely cut
birch wood that is dry. Fill the firebox with wood 2/3 part of
firebox height and light it from above. During burning the
fire box hatch should be kept closed and the ash draw-
er opened. When more than half of the wood has been
burned, continue refilling the firebox sufficiently often. To-
wards the end of heating the draught can be reduced with
the help of the ash drawer.
Heating is stopped, when the lower parts of the upmost
stones start glowing red. For the last fill of the firebox we
recommend using small firewood, which burn up quick-
ly and do not leave coal glowing long. To prevent soot
problems, AITO sauna heater should always be heated so
hot that the lower halves of the upper stones glow red.
When there are almost no embers left, push ash on the
grate in the ash drawer.
The ash drawer should be emp-
tied. The ash must be emptied in a non-combustible
container (for instance metal bucket).
Now close the ash
drawer, firebox hatch and the closing pan and the valve
in front of the closing pan. After this the glowing redness
spreads to the upper surfaces of the stones and the stones
become free from soot. Let the sauna heater stay like this
for a while so that heat will spread evenly in the area and
the sauna heater is ready for the steam bath (“löyly”).
Before starting enjoying your sauna throw the first “löyly”,
which removes any ash dust on the stones and the next
“löylys” will already be cleaner.
The first “löyly” is thrown
with the closing pan open and the valve in front of the
closing pan closed. In this way any ash on the stones
is directed in the stack via the flue.
After this the sauna
is ventilated.
If there is no ventilation valve in the upper part of the sauna,
the sauna can, when necessary, be ventilated by closing
the steam hatch and by opening the valve in front of the
closing pan. In this case the closing pan must be closed
(see the drawing below). This method can also be used for
drying the sauna after the bathing procedure.
Due to the risk of carbon monoxide, it is
strictly forbidden to heat the heat storing
sauna heater additionally during the bathing
procedure.
!
If for some reason the sauna heater requires additional
heating, the bathing procedure should be interrupted and
the sauna heater should be heated once again. The bath-
ing procedure can be continued only when there are no
flames and embers left, the ash drawer has been emptied
and the first “löyly” has been thrown according to the
instructions.
Heating of the sauna
AK-47
AK-57 AK-57K
Start-up (kg)
5
6
7
1.addition (kg)
4
5
4
2.addition (kg)
3
3
4
3.addition (kg)
-
-
4
4.addition (kg)
-
-
3
Sticks of firewood with a diameter around 5 cm,
length around 33 cm and weight around 0.5 kg
