Telex EVID Ceiling Speaker Systems - Manual (Page 9)

1. If plenum cable is used, slide the wiring
through the strain relief fitting on the termi-
nal cover plate (Figure 14). Hold the strain
relief fittings tight around the cable. Tighten
the strain relief screws first, then the hori-
zontal screw. In the cases of insulated
speaker wire and plenum cable, it is often
possible to provide acceptable strain relief
force by simply tightening the strain relief
screws onto the terminal cover plate.
2. If the installation used f lexible (BX) or rigid
(EMT) conduit, an alternate conduit fitting
can be used. See Installation Note and
Figure 15 below.
INSTALLATION NOTE: ALTERNATE
CONDUIT FITTINGS
Some cases require alternate fittings, many of
which are available through most electrical
suppliers. Simply remove the existing fitting
by unscrewing the two hold-down screws,
exposing a 7/8-inch (22 mm) knockout hole.
Then install the alternate fitting. Make sure to
always use a listed fitting in accordance with
your area’s building codes and regulations.
INSTALLATION NOTE: CEILING TILE
CAUTION
When mounting the units into 2'×2' or 2'×4'
suspended ceiling tiles, DO NOT install them
in lightweight fibreglass-type tiles without
full secondary support for the speaker as
noted in Step 6. Such tiles are not designed
to support any substantial weight. Speaker
installation without secondary support will
cause the tile to sag and distort, even with
the tile bridge installed. The secondary sup-
port line at the rear of the speaker MUST be
strung taut in these situations and MUST
remove most of the force of the speaker on
the tile to ensure that the speaker does not
deform the tile.
Step 5: Mount the Speaker Into
the Ceiling (Figure 16)
Push the speaker into
the ceiling hole until
the front baff le rim is
f lush with the ceiling.
Tighten the mounting
tabs by turning the
screw clockwise until
the speaker is secure.
Please note that the
first clockwise quar-
ter-turn rotates the
attachment tabs out-
ward. The remaining
turns tighten the tabs
down onto the back
of the ceiling surface
(see Figure 17).
7 EVID™ Ceiling Series Installation and Operation Manual
Installation and Wiring
Figure 14: Secure cable through fitting
Figure 15: Alternate conduit fitting
Figure 16: Mount
speaker into ceiling
Figure 17: Tighten mounting tabs