RadonTec AlphaAir Freshbox 25, Руководство пользователя

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35 Manual – AlphaAir Freshbox 25 Basic
If you drill the hole yourself with a drill bit (Ø 65 to 70 mm) (e.g.
for brick walls, Ytong or sand-lime bricks), first place the drill
bit horizontally with the center drill in the center hole. Now lift
the rear end of the drill slightly by approx. 3 cm to achieve the
necessary slope.
We recommend simultaneous dust extraction by a helper with
a vacuum cleaner or at least maintaining a dustpan. Drill
without percussion function and select pressure and speed so
that the drill bit becomes warm but not too hot. Excessive
pressure and speed reduce the service life of the tool and, in
extreme cases, can lead to "burning" of the Widia teeth.
Depending on the core bit used, you now have approx. 5 cm
working depth before the core bit is completely filled with the
drill core. Pull the core bit out of the wall and empty it into a
bucket. It is possible that the drill core has remained in the wall
and must be broken off or sucked out with the aid of a tool. As
soon as the drill hole is free, the next 5 cm can be drilled.
Always make sure to drill at the same angle so as not
to get wedged in the wall.
To prevent plaster from breaking out on the outside when
breaking through the wall, the pressure on the drilling tool
should be reduced shortly beforehand. For this purpose, a
mark of the wall thickness can be drawn on the drill bit or a
helper can observe when the longer center point first appears
on the outside. The cutting action of the carbide teeth is really
excellent, so that usually only the slightest fraying is to be
expected, which is later easily concealed by the outer screens.