Handleiding
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4. Installation Preparations
If IP33 rating is desired, rubber boots must be properly installed as part of the wiring process. The entire installation can be
accomplished, if necessary, without 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 “dog-ear” mounting tabs which lock into place. Inputs
and loop outs to the next speaker are attached to snap-in-place connector (included) which can be prewired before installing the
speaker for ultra-fast snap-on installation.
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, a particular procedure that is sometimes used for installation into sheetrock (typically gypsum board) can be facilitated
by the use of JBL’s optional pre-installation brackets before the sheetrock is installed. The pre-installation bracket provides a
bracket to which wiring can be strapped in-place behind the sheetrock. It can function as a cutout template when many cutouts
are to be made in a production-line style installation. And it can reserve a location in the ceiling prior to the sheetrock getting
installed. Two types of pre-installation brackets are available from JBL Professional as optional accessories:
1) The optional NC NEW-CONSTRUCTION BRACKET is made of at sheet metal, 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. Sheetrock installs after the
bracket gets installed, and the bracket provides a template for blind cutout of the hole in the sheetrock. For this process, the
sheetrock is typically cut with a router-type cutting tool, using the bracket ring as a cutout guide.
Figure 1:
Optional NC New -Construction Bracket
2) The optional MR PLASTER-RING BRACKET (or “Mud Ring”) contains a circular offset, forming an edge guide for sheetrock
plastering. The bracket has wings that attach to the building structure. Sheetrock is typically either precut or cut with a rotary
cutting tool using the outside of the plaster ring circle as a guide. The sheetrock hole is then plastered (or “mudded”) up to
the ring to create a seamless cutout.
Figure 2:
Optional MR (“Mud Ring”) Plaster Ring Bracket
Table 1: Pre-Installation Brackets
Model New Construction Bracket Plaster-Ring Bracket
Control 424C/T JBL-MTC-424NC JBL-MTC-424MR
Control 424LP, 426C/T, 426LP, & 426C/
T-LS
JBL-MTC-426NC JBL-MTC-426MR
Control 419CS/T JBL-MTC-419NC JBL-MTC-419MR
USING INCLUDED C-BRACKET WITH SHEETROCK
For most installations, the INCLUDED C-shaped backing plate provides adequate reinforcement to the ceiling material, distributing
out the clamping force from the dogears. Even if one of the dogears lands on the opening between ends of the C, the rest of the
dogears will land on it, so will be sufcient support for sheetrock installations.
Bekijk gratis de handleiding van JBL Control 424C/T, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | JBL |
| Model | Control 424C/T |
| Categorie | Speaker |
| Taal | Nederlands |
| Grootte | 3263 MB |
