Thermostat EFIT 540/550 is able to
use two sensors, one built-in sensor
plus an external sensor which can be
placed e.g. in the fl oor.
Choose the sensor(s) which will be
used for this heating system.
Turn to choose Room Sensor (r S),
Floor Sensor (FS) or both Room and
Floor Sensor (rFS), and press ...
(If the thermostat only uses a fl oor
sensor, the display will not show the
actual temperature (5º to 35º), but a
scale from 0 to 10).
Always use a fl oor sensor when the
heating element is installed on or be-
neath wooden surfaces !
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