6
Insulation and Wall Materials of the Sauna Room
In an electrically heated sauna, all the massive wall surfaces which store plenty of heat (such as
bricks, glass blocks, plaster etc.), must be sufficiently insulated in order to keep the heater
output at a reasonably low level.
A wall and ceiling construction can be considered to have efficient thermal insulation if:
•
the thickness of carefully fitted insulating wool inside the house is 100 mm (minimum 50 mm).
•
the moisture protection consists of e.g. aluminium paper with tightly taped edges. The paper
must be fitted so that the glossy side is towards the inside of the sauna.
•
there is a 10 mm vent gap between the moisture protection and panel boards (recommendation).
•
the inside is covered by 12–16 mm thick panelling.
•
there is a vent gap of a few millimetres at the top of the wall covering at the edge of the ceiling
panelling.
When aiming at a reasonable heater output, it may be advisable to lower the ceiling of the sauna
(normally 2.1–2.3 m, minimum height 1.9 m). As a result, the volume of the sauna is decreased, and a
smaller combi heater output may be sufficient. The ceiling can be lowered so that the ceiling joists are
fixed at a suitable height. The spaces between the joists are insulated (minimum insulation 100 mm)
and surfaced as described above. Because heat goes upwards, a maximum distance of 1.1–1.2 m
is recommended between the bench and ceiling.
NOTE: Consult building safety authorities to find out which part of the fireproof wall may
be insulated.
NOTE: The protection of the walls or ceiling with heat protection, such as mineral board fitted
directly on the wall or ceiling, may cause the temperature of the wall and ceiling materials to
rise dangerously high.
2.1.
2. The sauna room
Warnings
•
Sea air and a humid climate may corrode the metal surfaces of the combi heater.
•
Wiring and repairs must be done by a qualified electrician.
•
Do not use the combi heater as a grill, or for boiling food or liquids other than water in the
steam generator tank.
•
Do not cover the sauna heater. It may cause fire.
•
Do not put wood of any kind on the electric heater.
•
Do not use the heater as clothes dryer. It may cause fire.
•
Never sit on the heater. It is really hot. It can cause serious burns.
•
Never use the heater without stones. It may cause fire.
•
Do not use chlorinated water (e.g. from the swimming pool or jacuzzi) or seawater.
•
Don't put too much water on the heater.“Throw water onto the stones, one to three
ladles are enough at a time. After a couple of minutes you can throw little water again.”
•
Do not fill the steam generator tank up to the top, as boiling water causes an overflow
•
Do not turn on the steam generator without water in the tank. Always provide a bowl or
similar container to capture drainage water from the steam generator tank.
•
Always close the drainage valve after draining the water.
1.8.
1.7.1.
Temperature and Humidity of the Sauna Room
Both thermometers and hygrometers suitable for use in a sauna are available. As the effect
of steam on people varies, it is impossible to give an exact, universally applicable bathing
temperature or percentage of moisture. The bather’s own comfort is the best guide.
The sauna room should be equipped with proper ventilation to guarantee that the air is rich
in oxygen and easy to breathe. See item 2.4., (Ventilation of the Sauna Room).
Bathing in a sauna is considered a refreshing experience and good for the health. Bathing
cleans and warms your body, relaxes the muscles, soothes and alleviates oppression. As a
quiet place, the sauna offers the opportunity to meditate.
11
Electrical Connections
The combi heater may only be connected to the electrical network in accordance with
the current regulations by an authorised, professional electrician.
The combi heater is semi-stationarily connected to the junction box on the sauna wall. The
connection cable must be of rubber cable type H07RN-F or its equivalent.
NOTE: Due to thermal embrittlement, the use of PVC-insulated wire as the connection
cable of the combi heater is forbidden.
The junction box must be splashproof, and its maximum height from the floor must not
exceed 50 cm.
If the connection and installation cables are higher than 1 m from the floor in the sauna or
inside the sauna room walls, they must be able to endure a minimum temperature of 170ºC
(338ºF) when loaded (for example, SSJ). Electrical equipment installed higher than 100 cm
from the sauna floor must be approved for use in a temperature of 125ºC (257ºF)
(marking T125).
Electric Heater Insulation Resistance
When performing the final inspection of the electrical installations, a “leakage” may be
detected when measuring the combi heater’s insulation resistance. The reason for this is that
the insulating material of the heating resistors has absorbed moisture from the air (storage
transport). After operating the heater for a few times, the moisture will be removed from the
3.6.
3.7.
6,0 kW
8,0 kW
9,0 kW
SCA-60NSF
SCA-80NSF
SCA-90NSF
3 x 2,0 kW
3 x 2,66 kW
3 X 3,0 kW
5
7
8
9
13
14
288
288
288
445
514
514
5 x 2,5
3 x 2,5
5 x 2,5
3 x 2,5
5 x 2,5
3 x 2,5
421
421
421
400V 3N~
400V 3N~
400V 3N~
kW
kW
HEATER
SAUNA ROOM
SUPPLY
separate
separate
separate
18-22 kg
18-22 kg
18-22 kg
STONES
CONTROL
SIZE OF HEATER
SIZE OF
WIRE
DEPTH
HEIGHT
WIDTH
VOLTAGE
HEATING ELEMENT
MIN
MAX
TYPE
NUMBER
(m
3
)
(mm
2
)
(mm)
MODEL
SCA200
SCA266
SCA300
To determine the correct sauna room size for the heater, refer to the
technical data in Fig.7.
4. Technical data
Fig. 7
Technical data
(Steam Generator)
(Sauna Heater)
(Steam Generator)
(Sauna Heater)
(Steam Generator)
(Sauna Heater)
