Burda RELAX DARK IRC IP55 Notice D'utilisation Et D'entretien page 21

Ensure that the wall where you intend to attach the device is solid and that
within it do not pass electric cables or water pipes.
3. Insert the arch- shaped support
in the special rail on the upper side
of the device.
4. Align the holes of the supports and
join them together using the supplied
bolts, setting the desired inclination.
Ensure that the heater turns the rays
in the area to be heated. Firmly
tighten the screws when finished.
5. Attach the safety screws in the
corresponding holes.
The support to be fixed to the wall presents a series of holes that allow to
fix the heater in different positions.