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EN
1. INSTRUCTIONS FOR USE
1.1. General
The Harvia Forte electric heater is the right choice
for bathers who use the sauna several times a
week but not necessarily at fixed times. The heater
is always ready for use as long as standby heat is
maintained in it. Users need not wait long as the
sauna room can be quickly (5–15 minutes) heated
to a pleasant bathing temperature (+50...+60 °C).
The room heats up quickly when the heater cover
is opened and the heater power is turned up.
The thermal insulation of the heater is very effi-
cient, to ensure that a bathing temperature can be
maintained in the stone space using as little thermal
energy as possible. The daily energy consumption
of the heater in standby state is only 4–6 kWh. The
thermal power released by the heater does not go to
waste as it can be used to keep a sauna room with
good insulation both warm and dry. The required
amount of thermal energy can be adjusted by de-
creasing the power of the sauna heating equipment.
If the sauna room gets too hot, the temperature of
the stone space can be lowered.
Technical data
Heating/standby power (HI/LO): 4,35 kW,
•
6,5 kW, 9,8 kW
Heating power electronically controlled
•
Digital temperature control
•
Sauna stone temperature can be adjusted in
•
the range from 428 ºF to 500 ºF (220 to 260
ºC) at the control panel
Input power indicated by indicator lamp 8
•
Heater dimensions: width 500 mm, depth
•
530 mm, height 880 mm
Amount of stones approximately 100 kg
•
1.2. Operation Switches and Parts
1. Cover with silicone rubber gasket used to con-
trol the heat emitted.
2. Handle to safely open and close the cover
(fig. 1).
3. The cover hinge is equipped with a spring-
loaded latching device that keeps the cover
either open or closed.
4. Control and display panel.
5. Electric switch.
Display screen (1)
The screen displays either the HI or LO operation
state. In the LO state, the stone space is heated up
using standby heat. The heater's three heating ele-
ments are connected in series to one phase. The HI
state uses all of the heating power of the heater: the
heating elements of the three-phase electric system
are star-connected between phases. The display
screen indicates the temperature of the stone space
in bars (I–IIIIII) unless the operating button (3) has
been recently pressed.
When the decimal point of the rightmost digit (8)
on the display is lit, it indicates the power input (0
to 100 %) taken by the heater from the mains. For
example, if during an hour on LO setting the deci-
mal point is lit for 30 minutes altogether, the power
used by the heater equals to (30 min/60 min) = 0,5
x 660 W = 330 W. The example is from a 6 kW
4
1
2
5
Figure 1.
Heater parts
2
4
1.
Display screen
2.
Heater on/off switch (I/O button)
3.
Operating button
4.
Temperature adjustment button (–)
5.
Temperature adjustment button (+)
6.
Standby mode indicator light
7.
Heater power indicator light
8.
Power interval indicator light
Figure 2.
Control panel
heater. The shorter the time the decimal point is lit,
the more economical the heater is. The power inter-
vals can also be monitored while the heater capacity
setting is HI, because the thermostat switches the
heating power on and off once the set value of 500
ºF (260 ºC) has been reached.
I/O button (2)
The I/O button is used to switch the heater heating
elements on and off. For this to happen, the electric
switch must be switched on (see figure 1). The
indicator light burns under the I/O button to indicate
standby mode.
Operating button (3)
In the initial state, the heater is at the lower state
(LO). When the HI state is selected, the heater is
switched on to full capacity (4,35 kW, 6,5 kW or
9,8 kW) for one hour to ensure that the stone space
stays warm during the bath. The maximum heater
3
4
I/O
1
8
7
3
6
5
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