2N Lift emergency phone 2N LiftNet - Manual, 1446 v1.8.3 - Manual (Page 28)

Lift Cabin Audio Unit
– Universal
2.2
28
Mounting
Main Board Mounting
This audio unit is mounted behind the lift control panel. Typically, the panel is ready
for installation as shown in the drawing below:
4 spot-welded M4 screws
Perforated loudspeaker area
LED holes (optional)
Microphone hole or perforation
To mount the audio unit, you need 4 electrically spot welded M3 or M4 screws, a
sufficiently large loudspeaker perforation area and a microphone hole on the inner
(back) side of the panel. If needed, you can fix the audio unit on a perfectly degreased
surface with a good-quality two-sided foam self-adhesive tape.
Warning
 Leave no gap between the lift control panel and the audio unit surface to
avoid acoustic loudspeaker fault and acoustic loudspeaker-microphone
feedback.
Figure 2.4 Top View of
Mounting Hole Dimensions for
Lift Cabin Audio Unit - Universa