G E R R O E W H T H Y A S ERD-8 ERD8U Back Box / Mounting Device UL Listed 0401.1FLUSH MOUNTED, ROUND ERD8U Shown GENERAL DESCRIPTION MECHANICAL SPECIFICATIONS The Quam ERD-8 or ERD8U is a UL Listed (UUMW), Height 4-1/2 round, steel loudspeaker back box. A circular, molded Diameter 12-5/16 expanded polystyrene damping pad is fitted to the inside (Flange Max) top of the enclosure. Bottom Diameter 9-3/4 Finish: White baked epoxy hybrid. Top Diameter 8-1/2 Internal 275 cu. in. Displacement INTENDED USE Use with recommended additional Quam components to ATTACHMENT POINTS complete a loudspeaker assembly used in an indoor environment. TOP SIDE ERD-8 -- 4x welded SYSTEM COMPONENTS ERD8U -- 2x snap-in N/A ELECTRICAL ACCESS RECOMMENDED ADDITIONAL QUAM COMPONENTS TOP SIDE 0402 - Loudspeaker Mounting Devices, SSB-2 ERD-8 1x 4x - 90 apart ERD8U 1x 4x - 90 apart 0401.2 - Speaker, Transformer, Baffle & Volume Control OR All devices connect with twist-tabs to support bridge. 0104.3 - Speaker, Transformer, Baffle & Universal Knob Recommended construction sequences, installation instructions and A&E Control Specifications are available in various formats on the Quam Architects and Engineers Resources CD or on the web at: www.quamspeakers.com Quam-Nichols Company LU 234 East Marquette Road, Chicago, IL 60637 Phone: (800) NEED NOW Fax: (888) NEED NOW IBEW (800) 633 - 3669 (888) 633 - 3669 1031 Since 1930 E-Mail: neednow qnc.com www.quamspeakers.com 2011 Quam-Nichols Company Quam-Nichols reserves the right to make changes and/or improvements to its products at any time and without notice. TERD8 ERD8U 11MR04 T T A S R T S S B O H E J R E 04 BACK BOXES / MOUNTING DEVICES INSTALLATION INSTRUCTIONS 11-3.24 6485 ERD8 Series Back Can (UL Listed UUMW) intended for use with QUAM SSB-x Tile Bridge INTENDED USE: 2. Termination: All versions: Indoor environment, COMPLETE ASSEMBLY AS - Chose entry point to back can and knock out either 1/2 SHOWN mounted parallel to floor plane in a 24 wide, or 3/4 as required suspended ceiling tile grid mount height 18 or less above - Install UL Listed metallic enclosure entry fitting into floor plane. back can knockout to receive plenum cable or plenum Program material: Signal tones, voice and music. Whip. UL Listed 1480 - Feed supply cable through whip to connector. City of Chicago Approved - If transformer on assembly is listed as TBLU, install per Material and construction permits use wiring diagram below. For other QUAM transformers, where ceiling plenum is part of the air go to www.QuamSpeakers.com / Resources/ Wiring handling system - Insulate all unused taps from each other, the enclosure and electrical ground. 1. Preparation: - Cut 8-1/2 square hole in the tile using tile bridge as a 3. Installation in grid: template. NOTE AHJ/ local codes may require tie-off to structure. (Refer to specific tile bridge instructions for details) ERD8U Back Can Only: Snap in 2x tie-off tabs as shown - Bend up 4x horseshoe tabs on tile bridge in illustration at left. - Position tile bridge on TOP of tile, legs like: Bend 8x locator tabs around tile in opening - Orient back can over tile bridge, lining up slots with the - Install speaker /baffle on opposite of ceiling tile and 4x horseshoe tabs. fasten to tile bridge/tile assembly with 4x 8-32 screws - With pliers, twist tabs 1/2 turn, securing back can to provided with speaker/baffle assembly. bridge assembly. - Tie-off using straps on back can as required NOTE AHJ/ local codes may require tie-down to grid. SNAP-IN TIE OFF STRAPS (2) Create a hole in the T-bar next to the end of the tile bridge rails securing with wire through the hole in the end of the rail. HORSESHOE TAB (4) BACKBOX BRIDGE Brown 5W 25V only Red 2.5W 25V only Orange 1.25W 25V only ALL COMPONENTS Green 0.63W 25V or 5W 70.7V MUST BE USED White 0.32W 25V or 2.5W 70.7V 8 and ASSEMBLED Blue only 1.25W 70.7V as shown to be Gray only 0.63W 70.7V Violet only 0.32W 70.7V U.L. COMPLIANT BLACK ( Common ) QUAM Model TBLU 234 East Marquette Road Chicago, IL 60637 Phone: (800) NEED NOW Fax: (888) NEED NOW (800) 633 - 3669 (888) 633 - 3669 2011 Quam-Nichols Company Quam-Nichols reserves the right to make changes and/or improvements to its products at any time and without notice. V