Installation Preparations; Step-By-Step Installation And Wiring - JBL Control 12C-VA Owner's Manual & Installation Manual

Installation Preparations

The entire installation can be accomplished, if necessary, with-
out requiring access above the ceiling. Bracketry for use with
either suspended ceilings or sheetrock ceilings is included. The
speaker is held securely in place via mounting ears which lock
into place.
OPTIONAL PRE-INSTALLATION BRACKETS
IN MOST CASES, NO BRACKETS OTHER THAN THE
ONES INCLUDED WITH YOUR SPEAKER ARE REQUIRED.
Everything needed for most installations of these loudspeakers
is provided with your Control Contractor ceiling speaker.
However, when the speaker is being installed into a sheet rock
(typically gypsum board) ceiling, JBL's optional pre-installation
brackets can be installed before the sheetrock is installed. The
pre-installation bracket provides a bracket to which wiring can
be tied behind the sheetrock. It can function as a cutout tem-
plate when many cutouts are to be made in a production-line
style installation, and it secures the ceiling speaker to the
building structure. Two types of pre-installation brackets are
available from JBL Professional as optional accessories:
1) The optional NEW-CONSTRUCTION BRACKET is made
of flat sheetmetal, with wings to attach to the building structure.
Holes are drilled for nails or screws at 16 inches (406 mm) and
24 inches (610 mm) on-center. Additional holes can be drilled
by the installer at other spacings up to a maximum of 24-3/4
inches (630 mm) apart. Sheet rock installs over the bracket, and
the bracket provides a template for blind cutout of the hole in
the sheet rock. The sheet rock is typically cut with a router-type
cutting tool, using the bracket ring as a cutout guide.
Optional NC New-Construction Bracket
2) The optional PLASTER-RING BRACKET (or "mud ring")
contains a circular offset, forming a edge guide for sheet rock
plastering. The bracket has wings that attach to the building
structure. Sheet rock is typically either precut or cut with a
rotary cutting tool using the outside of the plaster ring circle as
a guide. The sheet rock hole is then plastered (or "mudded") up
to the ring to create a seamless cutout.
Figure 1:
Optional MR Plaster-Ring Bracket ("Mud Ring")
Table 1: New Construction Brackets
Model
Control 12C-VA MTC-24NC
Control 14C-VA MTC-24NC
Control 16C-VA MTC-26NC
USING INCLUDED C-BRACKET WITH
SHEET-ROCK
For most installations, the INCLUDED C-shaped backing plate
provides adequate reinforcement to the ceiling material, spread-
ing out the clamping force from the tab clamps.
CUTOUT SIZES
Table 2: Cutout Sizes
Model
Control 12C-VA
Control 14C-VA
Control 16C-VA
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 to access from both the top and bottom of the ceiling tile
during various phases of the installation.
3
Figure 2:
New
Construction Plaster-Ring
Bracket Bracket
MTC-24MR
MTC-24MR
MTC-26MR
Cutout Size
(diameter)
167 mm (6.7 in)
167 mm (6.7 in)
225 mm (8.8 in)