Step-By-Step Installation And Wiring - Jbl Control 400 Micro Serie Manuel Du Propriétaire

5. STEP-BY-STEP INSTALLATION AND WIRING

The installation system has been designed so that the entire
installation can be accomplished from beneath the ceiling
for instances when access above the tile is not possible or
practical. However, in some cases it may be easier -- with
removable ceiling tiles, for example -- to access from both
the top and bottom of the ceiling tile during various phases
of the installation.
Note: the wiring method shall be in accordance with:
(1) In Canada, CSA C22.1, Canadian Electrical Code, Part I,
Safety Standard for Electrical Installations, Section 32
(2) In the United States, NFPA 70.
Step 1 – Cut the Hole. Cutout the hole size either by tracing
the included cardboard cutout template or by scribing a hole
using the cutout size chart above. Use a safe tool such as a
jigsaw to cut the hole and proper eye protection. Be precise,
not deviating from the cutout diameter by more than 1/16th of
an inch (1.5 mm). Pull the wiring through the cutout hole.
Figure 3:
Hole Cutout
(Shown: Wire in flex conduit)
Step 2 – Insert Backing Hardware Through the Hole.
Packaged with the speakers are two types of backing hardware
– a C-shaped backing-plate ("C-ring") bracket and two tile
rails.
Suspended Ceilings – Insert the C-ring through the hole
cut in the ceiling tile (or set it in place from above the
ceiling, if there is access). Place the C-ring around the hole
with the tabs located as shown on Figure 4. Insert the tile
rails through the cut hole in the ceiling tile. Snap the two
rails into the two tabs in the C-plate and align the rails so
that the ends extend OVER the T-channel grid on the side
of the tile. Secure the rails onto the C-ring tabs by inserting
a screw though each tab into the rail. This can all be
accomplished from below the ceiling tile, if necessary.
FOR SAFETY: IMPORTANT TO USE BRACKETS
ALL included support brackets – C-ring and tile rails -- MUST
be used when installing into suspended ceiling tiles.
Figure 4:
C-Bracket and Tile Rail Positioning on Ceiling Tile
Tile Rails: The tile rails are designed to fit either standard
24-inch-wide tiles or 600-mm-wide tiles. The tile rail pieces do
NOT physically attach to the T-grid struts. Instead, the inverted-V
shape at the ends of the rails sits ABOVE the T-grid strut. During
normal operation, the rails are supported by the edge of the tile. In
the unlikely event that the tile comes out or falls apart, the ends of
the support rails are designed to catch onto the T-grid, providing
secure support to hold the loudspeaker assembly in place.
Optional accessory Tile rails JBL-MTC-48TRX4 (pack of 4 Tile
Rails) are also available for installation into larger 4' x 4' (1200
x 1200 mm) ceiling tiles.
Vibration Reduction: These loudspeakers can generate
substantial audio output, which can cause buzzing of the
ceiling materials or structure. Depending on the character of
the ceiling tile and structure, the installer might need to place
neoprene or other dampening material under the tile rails or
the edges of the tiles to eliminate rattles.
Cutout Placement: The tile rails are pre-punched with
attachment holes along their length. Placement is not limited
to the center of the tile as is the case with many other tile rail
support systems.
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