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GB Yrittäjäntie 14, FI-27230 Lappi • tel. +358 0207 416 740 • fax +358 0207 416 743 • www.narvi.fi/en
Do not stack rewood in the rebox over 2/3 of its height.
Quantities of rewood are shown in clause 4.1. In the ignition
phase the ash drawer can be kept open by 10 mm more than
indicated in the table. After igniting put the ash drawer back in
the position as shown in the table.
In a sauna heater equipped with a water tank or in a sauna
heater that is heated from another room rewood should not
be burnt in the front part of the rebox / in the extension, but
the rewood must be placed entirely on the grate of the rebox.
Do not forget that the sauna heater and its part become
very hot during heating. If you need to touch the parts
of the sauna heater, always use protective gloves. When
moving around in the sauna be careful, because the floor
and the ceiling of the sauna may be slippery.
Be careful – water in the water tank of the sauna heater
may be very hot.
One rebox of rewood burns approximately half an hour. A
good time for adding rewood is when there are still some
blue ames on the coal in the rebox. Before adding rewood
you may even slightly smooth coal on the grate. If rewood is
added in the ames too early, the temperature of fume gases
increases. Do not use the door to push rewood in the rebox.
In case the sauna is used or the sauna heater is heated also
after the recommended number of times rewood should be
added as shown in the table, rewood should not be added
according to the quantities mentioned in the table. A proper
quantity for keeping heat is 1-2 logs (approximately 1 kg of
rewood) every half an hour. The ash drawer may be closed
a bit. If you add a big quantity of rewood, the temperature
of ue gases rises and this can damage the smoke ue and
cause a re hazard. But do not heat continuously over 3 hours.
Thereafter, the sauna heater must be allowed to cool down
before the next heating.
In case the sauna will not be used any longer and coal is still
glowing without ame, extinguishing can be speeded up by
increasing the draft. For this open the ash drawer by 10-20
mm. There is enough heat accommodated in the stones of the
sauna heater to dry the sauna room.
In the ignition phase the closing pan must be fully open. Before
you close the closing pan after heating, check that there is no
glowing coal in the rebox. Otherwise fumes may be released
in the sauna. Carbon monoxide is an odourless and colourless
toxic gas.
If you have not used the sauna heater and smoke ue for a lon-
ger period or it is cold, please check before use that the smoke
ue is in proper order and that there are no corrosion damages
on the sauna heater. Start heating very slowly and with small
quantity of rewood so that not to damage the smoke ue.
4.3 Steam water
Use normal domestic water for steam water.
Quality requirements for domestic water:
• humus content < 12 mg/l
• iron content < 0.2 mg/l
• calcium content < 100 mg/l
• manganese content < 0.05 mg/l
Do not use sea water or other salty water. Also do not use wa-
ter containing chlorine. The warranty of the sauna heater does
not cover damages caused by the use of unsuitable steam
water. Do not throw water on the stones, if you yourself or
somebody else is right next to the sauna heater. Hot water
steam may cause burns.
4.4 Removing the ashes
The ash drawer must be emptied every time before heating the
sauna heater. The ash drawer must be emptied immediately, if
ashes ll more than half of the drawer. Otherwise, the airow
through the rebox grate will be hindered, which will shorten
the life of the grate.
The ash drawer must be emptied in a non-combustible con-
tainer (for instance metal bucket) after ash has cooled down.
Do not leave the ash bucket standing by the wall (for instance
on the terrace). If the smoke ue is equipped with a closing
pan, it should be opened for the time the ash is removed. Dust
will escape with the draft.
4.5 Maintenance of the sauna heater
Besides removing the ashes and having the chimney annu-
ally cleaned by a chimneysweep, the sauna heater requires no
other maintenance. To open the cleaning hatch of the sauna
heater, the upper stones have to be removed from the sauna
heater.
The stones of the sauna heater have to be re-arranged once
per year and replaced every other year. Cracking stones col-
lapse and fall lower, some stones will erode. Remove eroded
and broken stones. Due to insufcient maintenance the sauna
heater needs more time for heating, which in its turn causes
load on the structure of the sauna heater. The enamel surface
of the sauna heater should be cleaned regularly with a damp
cloth.
Also the water tank of the sauna heater should be regularly
cleaned. Use only clean water to ll the tank. If there is a dan-
ger that water can freeze, the water tank should be emptied.
4.6 Disposal
For disposal take the sauna heater to a public waste recy-
cling centre.
