NARVI Oy Finland NC20, Инструкции по установке, использованию и обслуживанию

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2. Before you install the
sauna heater
Before installing and using the sauna heater, make sure you
are thoroughly familiar with the requirements for installing
the sauna heater in the steam room. In case of questions
and for additional information do not hesitate to contact
the Rescue Board or a construction supervision authority.
When installing fireboxes all local laws have to be followed,
including those referring to local and European standards.
2.1 Steam room
If the walls of a steam room are made of uncovered glass,
brick or concrete add 0.8–1.5 m3 per square meter of such
wall and the final choice of the heater shall be made based
on the sum of the area. If the heater is installed in a sauna
that is normally not heated or the sauna is made of mas-
sive logs, multiply the sauna area by 1.5 and choose the
heater based on this. The recommended minimum area of
a steam room is indicated in clause 1.1. Please follow the
values for the minimum area stipulated for a steam room.
We recommend choosing a sauna heater with slightly more
power to ensure proper heating of the sauna and to avoid
heating the sauna heater to its upper limit. Slightly stronger
power ensures a longer lifetime of the sauna heater and
provides better steam thanks to a greater quantity of
stones.
2.2 Substrate
A firebox must be installed on the floor with sufficient
load-bearing capacity. The durability of the floor must be
checked especially carefully, when the sauna heater is in-
stalled on a wooden floor. The weight of the sauna heater
is shown in clause
1.1.
If the existing floor does not meet
this prerequisite, suitable measures (e.g. load distributing
plate) shall be installed to achieve it.
CONCRETE FLOOR
The sauna heater may be installed directly on a concrete
floor, which is at least 50 mm thick. If underfloor heat-
ing cables or pipes are located under the sauna heater, a
Kota installation base must be used to protect them from
the sauna heater’s thermal radiation.
FLOOR MADE OF COMBUSTIBLE MATERIAL OR A TILED FLOOR, UN-
DERFLOOR HEATING
A Narvi installation base must be installed under the sauna
heater, which will protect the floor, moisture barrier and un-
derfloor heating pipes or cables from the thermal radiation
of the sauna heater.
2.3 Safety clearances
When installing the sauna heater, safety clearances must
be taken into account. Ignorance of safety clearances
causes a fire hazard. If required, additional information
can be obtained from the regional branch of the rescue
board.
2.3.1 Structure made of combustible materials
The safety clearances are the minimum allowable dis-
tances between the sauna heater and structures made of
combustible materials. Please observe the stipulated re-
quirements regarding walls, floors, sauna benches, other
inventories and storage areas of firewood!
Structure Safety clearance, mm
Top surface
NC 16 NC 20 NC 24
1250 1225 1200
Front surface 500*
Side surface 150
Back surface 150
*We recommend leaving 1000 mm maintenance area in
front of the sauna heater.
Rear and side safety distances can be shortened by using
Narvi protective wall shields. Our dealers can provide more
info regarding suitable safety walls for sauna heaters.
Protecting a wall made of combustible material
Figure 3 . If the sauna heater is installed on a floor made of
combustible materials, an installation base must be used.
A piece of sheet metal must be installed in front of the in-
stallation base, which extends at least 100 mm over the
sides of the heater hatch and at least 400 mm in front of
the sauna heater. The sheet metal edges facing the sauna