User manual QSC AUDIO AD-821 REV C

[. . . ] AD-C Series AD-C820/AD-C821/ AD-C1200 User Manual AD-C820 ­ 203 mm (8") 2-way coax baffle assembly AD-C800BB ­ Pre-install enclosure for AD-C820 AD-C821 ­ 203 mm (8") 2-way coax blind-mount AD-C800 RAIL KIT ­ Split Ring and Tile Rails for AD-C821 AD-C800RG ­ Round Grille for 8" loudspeaker AD-C800SG ­ Square Grille for 8" loudspeaker AD-C1200 ­ 304 mm (12") 2-way coax baffle assembly AD-C1200BB ­ Pre-install enclosure for AD-C1200 AD-C1200SG ­ Square Grille for 12" loudspeaker TD-000296-00 REV. C *TD-000296-00* IMPORTANT SAFETY PRECAUTIONS AND EXPLANATION OF SYMBOLS WARNING! 1. Install in accordance with QSC Audio Product's instructions and local building codes. The installation should be done by a licensed installation professional. [. . . ] (The Wire Clamp Fitting prevents wire stress and strain from pulling the connections/connectors loose and prevents wear on the wires against the cover plate. ) 11. Rotate the connection cover plate closed, making sure not to stress the connections or pinch the wires. Make sure this screw is tight; if not it may rattle when the loudspeaker system is in use. Follow the instructions on page 13 titled Mount the AD-C820 or AD-C821 Loudspeaker System. 10 AD-C800BB and AD-C820 Installation The AD-C800BB is designed to be pre-installed into the ceiling and wired. The AD-C820 Loudspeaker Baffle assembly is plugged into and secured to the back box at a later time. AD-C800BB Back Box Installation The AD-C800BB installation should be done by a licensed installation professional and wiring installed by a licensed electrician in accordance with local building codes. There are 5 wiring ½" & ¾" knockout locations, shown as item a (Figure 16), available on the AD-C800BB back box. Remove the knockout(s) through which the loudspeaker signal wires are to be routed. Secure the AD-C800BB back box using the suspension straps shown as item d (Figure 4), to a structural part of the facility that is able to support ten times the combined weight of the AD-C800BB and the AD-C820 Loudspeaker Baffle assembly (17 lbs. Consult local building code requirements. a a a a a ­ Figure 16 ­ Note: The minimum wire gauge is 20 AWG, the maximum is 8 AWG. You can substitute the necessary fitting if the facility's loudspeaker signal wiring is in conduit. Route the facility's loudspeaker signal wires through the knockout hole(s)/Wire Clamp Fittings and to the ceramic terminal block. Strip the ends of the wires to approximately 0. 4"(10 mm), and tin the ends of the wires. There are two wires already connected to the terminal block; the striped wire is negative, the solid color wire is positive (Figure 17). Connect and secure the facility's loudspeaker signal wiring to the ceramic terminal block using a #1 Phillips head screwdriver. Note: For daisy-chaining loudspeakers, insert the extra pair of wires into the same connections as the facility's loudspeaker signal wires described in these steps. Note: Typically the striped wire is black/white, the solid is gray. 11 d c b ­ Figure 17 ­ a. Connect the 10-pin Mate-N-LokTM connector from the AD-C800BB to J1 on the transformer tap switch PCB. Connect the 3 Faston connectors to the crossover points J2, J3, and J4 on the larger PCB. If the wire colors on the harness are different than the labels, one connector is smaller than the other two and will fit on only one jack. The other two wires can be connected to either of the two larger jacks. Wiring harness from AD-C800BB J4 J3 J2 J1 ­ Figure 18 ­ 3. Follow the instructions on page 13 titled Mount the AD-C820 or AD-C821 Loudspeaker System. 12 Mount the AD-C820 or AD-C821 Loudspeaker System Note: The Mounting Clamps are part of the assembly and allow for mounting surfaces (ceiling) up to 2. 75" in thickness. Do not install the grille until clamps have been tightened and any adjustments made. [. . . ] Note: The use of LOCTITE® is recommended to prevent grille screws from loosening during use. Note: The extra mounting holes, shown as item c (Figure 27), are to be used with previously installed enclosures from other manufacturers. The holes take a 4 mm screw, and are spaced 353 mm square. 18 Disconnect Transformer from the AD-C1200 Circuitry If you are connecting the loudspeaker to a 16 ohm system, you must disconnect the transformer. Loosen the two M3 wire securing screws using a #1 Phillips head screwdriver and remove the wires. [. . . ]