2.2 Installing the sensor near a supply air vent
The sauna room air should be exchanged six times in an
hour. The diameter of the supply air pipe should be
between 50 and 100 mm.
A circular air supply vent (360°) must be
installed at least 1000 mm away from the sensor.
An air supply vent with a flow-directing panel
(180°) must be installed at least 500 mm away from
the sensor. Air flow must be directed away from the
sensor.
2.3 Ceiling installation of the sensor
Ceiling installation of the sensor In ceiling installation, a 5-mm hole must be drilled to the sensor case to allow
any condensed water to drain.
Do not spray water directly towards the sensor or splash water at it with a sauna scoop.
2.4 Installing the Extra NTC sensor
The additional OLET 31 sensor is connected to the Ext NTC connector on the RJ10 circuit board. For more de-
tails, refer to the switch diagram. The additional sensor is installed on the sauna room wall no more than 500
mm from the ceiling. Once the additional sensor has been connected to the circuit board, it is automatically acti-
vated. This means that the temperature shown on the control panel is measured by the additional sensor.
The primary sensor installed above the sauna heater only has the limiter circuit that limits the maximum temper-
ature to 110 °C. Even if the temperature is set to 110 °C on the control panel, the maximum temperature that
can be shown on the panel is approximately 90 °C, as the primary sensor above the heater limits the maximum
temperature to 110 °C. Depending on individual preferences, the temperature of a sauna room is typically set
between 70 and 80 °C.
2.5 Sauna heater safety clearances
Table. 1 Safety clearances
Output
Sauna room
Heater minimum clearances
Amount of stone
kW
Volume
Height
From side
A
mm
From front
D
mm
To ceiling
F
mm
ca. kg
min.
m³
max.
m³
min. mm
6,0
5
10
1900
100
300
1070
38
9,0
9
13
1900
100
350
1070
38
ø
5 mm
6
Installation and User Manual
HELO Roxx Premium
360°
1000 mm
180°
500 mm
Sensor
Sensor
