Wiring Diagam
Dimensions
Mounting the System in a Ceiling
Using the T-bar Support Accessories
The Electro-Voice
®
EP Series ceiling speaker systems have been designed
to accommodate a wide range of ceiling tile and structural ceiling materials.
The spring assemblies can accommodate a range of material thicknesses
from 0.375-inch up to 1.25-inch thick.
Before beginning the installation, determine the type of material employed
in the ceiling. For all “soft” ceiling tiles, it is imperative that the optional CTB
ceiling tile bridge be utilized. The support rails are 603 mm (23-3/4 in.) long
and will support a loudspeaker system in a 2 ft x 4 ft (or 2 ft x 2 ft) tile. In
addition, if angled at 10 to 15 degrees, the tile bridge can be used with 600-
mm tiles (see Figure A).
Figure A
Ceilings constructed from particle board, gypsum board or plaster do not
normally require the use of a tile bridge.
Preparing the Wires
The ceiling system is provided with an eight-way barrier strip that provides
access to each transformer tap. Up to #10 gauge wire can be used, and a
choice of both screw terminal or spring-loaded push terminals have been
provided (see Figure B). The recommended strip length is 6.4 mm to 8.0
mm (0.250 in. to 0.312 in.).
Using Conduit Fittings
The rear cover has provisions for use of a junction box, or gland-nut style
fitting (see Figure E). This allows both solid and flexible conduit to be
connected directly to the system. If local codes require the use of conduit,
ensure that it is well supported. Too much unsupported weight may prevent
the ceiling system from closing flush against the ceiling surface.
Selecting a Transformer Tap
The transformer tap of choice can be obtained by making connection
between the ground terminal (# 1) and any of the wattage taps indicated on
the input label (#5, 6, 7 or 8). Either 70-V or 100-V lines can be used —
refer to the input panel label to determine the appropriate wattage for the
line voltage used (see Figure B).
Figure B
Cutting Mounting Holes
• The hole for the 4-inch systems should be 171 mm (6.75 in.) (See
Figure C)
• The hole for the 6.5-inch systems should be 203 mm (8.00 in.)
• The hole for the 8-inch systems should be 241 mm (9.50 in.)
Note:
The CTB-Series of tile support bridges provide a perfect hole template
and will center the hole on the width of the tile.
Figure C
Check for electrical conduit/wiring and other hazards before cutting the
hole. In addition, allow sufficient clearance for both the depth of the
loudspeaker/enclosure and any electrical fittings used.
Installation
T-bar support
The T-bar system is comprised of two support bars and a support bridge.
The bars are inserted through tabs formed in the two sides of the bridge
and can be adjusted to allow the cut-out to be positioned at any point on the
width of a ceiling tile. Additionally, the tile bridge system can be moved
along the drop ceiling support rails and positioned at any point along the
length of a ceiling tile. The ceiling bridge should be positioned directly
above the hole cut in the ceiling tile with the bridge resting directly against
the rear of the tile.
Bezel / Spring Assembly
The bezel/spring assembly is installed from the “room side” by pushing
the inner tubular section up through the hole cut in the ceiling tile. If a tile
bridge is used, the bezel inner tube will also pass through the hole in the tile
bridge. The top leg of the clamp springs ([3] for the 4-inch and 6.5-inch
systems and [4] for the 8-inch system) should be released, one at a time,
by reaching through the hole. Ensure that the metal arms are seated firmly,
and evenly, on the ceiling
Figure D
tile or ceiling tile/bridge combination (see Figure D). Then push the bottom
leg of the clamp spring up through the slot in the spring bracket pushing
slightly counter clockwise to lock in position. This keeps constant pressure
on the spring leg.
Figure E
Loudspeaker System Assembly
Before installing the ceiling loudspeaker system it is necessary to pull the
hook up wire downwards through the hole in the ceiling and make electrical
connection to the terminal block on the rear cover — as previously
discussed. If required by local regulations, a mounting point is provided on
the rear cover that can be used for the attachment of a safety chain, or
wire (see Figure B).
All Electro-Voice
®
EP Series loudspeaker systems can be installed by
pushing this assembly through the central opening of the bezel assembly
and then rotating the grille/loudspeaker until the “pins” on this item align
with the “bayonet” slots on the bezel assembly (see Figure F).
Figure F
Removing a Loudspeaker System Assembly
A loudspeaker system can be removed by pushing upwards on the grille
and rotating the grille/loudspeaker combination until the pins on the grille
escape the bayonet slots on the bezel assembly (see Figure F). Disconnect
the safety chain or cable (if employed) and disconnect the electrical
connection.
Painting Loudspeaker Assemblies
Bezels
The bezels may be painted before or after installation. Use conventional
spray or roller equipment to paint the loudspeaker bezel when the rest of
the ceiling is painted. Latex and oil based paints will adhere easily to the
loudspeaker bezel, but can scratch if handled carelessly.
Figure G
Grille/Loudspeaker Assemblies
Brushes or rollers may clog the grilles, interfering with the acoustic
performance of the ceiling system. Additionally, a high-pressure spray system
may penetrate through the cloth barrier, coming into contact with, and
damaging, the paper cone. Instead, spray paint the grilles with lacquer or
enamel paint in aerosol cans. (A professional, siphon feed spray gun may
also be used, provided the pressure is sufficiently low to prevent cone damage).
Place the grille/loudspeaker system on a flat surface, facing upwards. Clean
the grilles first to remove all possible contaminants. Apply the paint at a 45
degree angle to the grille surface, (see Figure G). Rotate the grille 180 degrees
and apply a second coat of paint. Alternatively, the grille can be removed
from the loudspeaker enclosure by the removal of three self tapping screws
in the vertical section of the grille (see Figure F).
Safety Regulations
All Electro-Voice
®
EP Series of ceiling loudspeaker systems comply with
the following standards:
·
UL 1480 (general purpose category) [The UL category is ueay, the
control number is 8682 and the file number is E121872]
·
UL 2043 (air handling spaces)
·
NFPA 70 NEC 1993 Article 300-22 (C) and UL 2043: NFPA 90A-1993
Installation of air-conditioning and ventilation systems, section 2-3.10.1
(a) exception 2.
Packaging
Please note that Electro-Voice
®
EP Series ceiling loudspeaker systems are
packaged and sold in quantities of (6). In addition, the systems are delivered
in two containers pack 1 of 2 which contains (6) grille / loudspeaker assemblies
and pack 2 of 2 which contains (6) bezel assemblies. This arrangement allows
the sound contractor to deliver the bezel (pack 2 of 2) to the construction site
earlier for installation by a subcontractor (when appropriate). Pack I of 2 can
be retained (locked in a secure part of construction site or on the sound
contractors premises) until the completion date when the sound contractor
can complete the installation. The optional tile bridge CTB-4 (packaged in
quantities of six) must be ordered separately.
Architects’ and Engineers’ Specifications
EP405-8T/EP405-16T Duplex Ceiling Loudspeaker Systems
The loudspeaker systems shall comprise of a spring/bezel assembly,
front grille, rear enclosure, transformer and 4-inch full-range loudspeaker.
The loudspeaker system shall meet the requirements of UL 2043. The
loudspeaker will feature a 4-inch curvilinear cone and a high-temperature
voice-coil assembly. The loudspeaker shall meet the following criteria. AES
power rating shall be 16 watts of band-limited pink noise (105 Hz to 15
kHz, 6 dB crest factor). Frequency response, uniform from 105 Hz to 15
kHz. Pressure sensitivity, 90 dB SPL at 1 meter (88 dB at 4 feet) on axis
with one watt of band-limited pink noise from 500 Hz to 3 kHz (ref. 20 ì Pa).
Minimum impedance, 7.0 ohms. The loudspeaker shall be 203 mm (8.00
in.) in diameter and 184 mm (7.25 in.) deep. Weight shall be 2.0 kg (4.5 lb)
[EP4058T] and 2.3 kg (5.0 lb) [EP405-16T]. The ceiling loudspeakers
packages shall be the Electro-Voice
®
models EP405-8T with an 8-watt
transformer; and EP405-16T with a 16-watt transformer.
