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capacity may raise the temperature of the sauna
room from the ideal 140 degrees Fahrenheit (60
degrees Celsius) to a higher temperature, depend-
ing on the size, wall materials and insulation of the
room. In this case, the heater cover must be left
fully open for long enough. If the temperature of the
room rises too high, the operating button should be
used to switch back to LO state.
The heater automatically returns from HI to LO
state in one hour.
Temperature adjustment buttons (4 and 5)
The temperature adjustment buttons 4 (–) and 5
(+) are used to set the stone space to the required
temperature (I=min. 428 °F/220 °C, IIIIII=max.
500 °F/260 °C). Holding the button down speeds
up the setting process.
Indicator lights (6 and 7)
Indicator lights 6 (LO) and 7 (HI) are used to show
which state is in use. The lower light indicates
standby heat and the upper light represents heater
power.
1.3. Thermostat and Overheat Protector
1.3.1. Thermostat
Heating of the stone space is monitored by a ther-
mostat. The temperature is measured using a ther-
mocouple sensor that follows the temperature very
closely and an electronic, processor-controlled meas-
uring device. Because the thermocouple sensor is
fixed to the casing of the stone space, the sensor is
at the same temperature as the stones. Thanks to
the short, pre-set connection time, the thermostat
maintains the temperature of the stone space very
close to the selected value. Even if the heater cover
were closed and the heater turned on to full capac-
ity, the thermostat would not let the temperature of
the heater rise high enough to damage the rubber
gasket. If, however, the gasket is damaged for some
reason, it can be replaced.
Continuous use of standby ensures that the stone
space can provide heat as soon as the heater cover
is opened.
When the operating button is used to set full heat-
er capacity (HI), the heater temperature is set to
500 °F (260 °C). This temperature cannot be set
using the temperature adjustment buttons 4 and 5
(fig. 2). If the heater cover is closed while the heater
operates at full capacity, the pre-set temperature of
the stone space 500 °F (260 °C) can be achieved
more quickly.
1.3.2. Overheat Protector
If, for some reason, the temperature of the heater
rises too high (over 644 °F/340 °C), the over-
heat protector protects the heater by permanently
switching off the current in the heating elements.
To signify this, the error message Er3 flashes on the
display. Since the sensor of the overheat protector
is closely connected to the upper part of the stone
space, it reacts quickly to changes in the tempera-
ture of the chamber.
The overheat protector cannot be reset to allow
current to flow to the heating elements until the
heater has cooled down and the temperature has
fallen below the switch-off value. The error message
Er3 must also disappear from the display. The me-
chanical reset button (see figure 3) is used to reset
the overheat protector. To reset the protector, press
the button until you hear a click.
The reason for the malfunction must be deter-
mined before the button is pressed:
Are there enough stones?
•
Have the stones started to crumble and pile up
•
more compactly in the stone space?
Has the heater been on for a long time at full
•
capacity with the cover closed?
Before switching the heater on always check
that there isn't anything on top of the heater
or inside the given safety distance.
Figure 3.
Overheat protector
1.4. Piling of the Sauna Stones
The sauna stones for a heat-storing electric heater
should be 5 to 10 cm in diameter. The sauna stones
must be solid blocks of stone specially intended for
use in the heater. Ceramic, light or porous stones,
stones with a small number of edges and stones
of equal size must not be used. They may hinder
the air circulation in the stone space and cause the
heating elements to overheat and become damaged.
Also using of soft soapstones as sauna stones is
forbidden.
Stone dust should be washed off before piling
the stones. The stones are piled on the bottom of
the heater's stone space and the grate in between
the heating elements (resistors) so that the stones
support one another. The stones should not be piled
too tightly to allow the air to freely flow through
the stone space. The weight of the stones should
not lie on the heating elements. The stones should
not be piled too tightly, so that air can flow through
the heater. See Figure 4. The stones should be not
wedged between the heating elements. The heat-
ing elements should neither be in contact with the
walls of the stone space nor touch one another. The
entire stone space should be filled with stones, but
there should be enough space for the lid to close
properly.
Note! When the stones have been placed inside
the heater, the heater should be warmed up to re-
move moisture from the stones. See item 1.5. "Set-
ting the heater in standby mode and heating it for
the first time".
The heater should not be used without stones!
The guarantee does not cover any faults caused
5
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