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User Manual
This setup guide contains installation information about the Extron SF 228T
speaker. This speaker is designed for use in plenum rated ceiling spaces and
can be dropped into a standard 2 feet x 2 feet or 2 feet x 4 feet
(with supplied cross bars) false ceiling tile space on a T-bar grid.
CAUTION
:
Installation and service must be performed by
authorized personnel only.
Planning the Installation
Installation of conduit and conduit adapters must conform to all applicable building codes and local ordinances.
z
Installation in a plenum-rated environment requires a wire gauge of 12 AWG to 18 AWG. Conduit may be required.
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NOTE:
When daisy chaining speakers in 70 V or 100 V configuration, the maximum wire gauge is 16 AWG.
When daisy chaining speakers in direct (8 ohm) configuration, the maximum wire gauge is 14 AWG.
If using seismic supports, the installer provides the cables.
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Wiring connections depend on whether a distributed (70 or 100 volt) or direct speaker audio system configuration is
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installed with these speakers.
Installation
To install the speaker system:
Power down all attached devices before proceeding.
1.
Remove the 2 feet x 2 feet ceiling tile where the SF 228T
2.
will be installed. If the ceiling has 2 feet x 4 feet tiles,
remove the tile and cut it in half.
Loosen, but do not remove, the two screws on the top
3.
terminal cover plate as shown at right.
Slide and remove the terminal cover plate, which is
4.
installed with the transformer side in. Temporarily flip the
terminal cover plate so the transformer side faces out.
See below.
Transformer
Terminal Block
Tap Label
When using flexible conduit, insert the conduit into the cover plate
5.
cable access opening using an appropriate conduit adapter.
Secure the conduit to the plate. See right.
c
Terminal
Cover Plate
(Black) To Speaker . Terminal
(Red) To Speaker , Terminal
Cable Access Opening
Loosen but do not remove
the two screws in the keyhole
slots on either side of the
cover plate.
Flexible Conduit Adapter
Flexible Conduit
Terminal Cover Plate
Speaker
Terminal
d
Keyhole Slots
Seismic Cable Pass
Through Loop
Rear of Speaker
1
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Summary of Contents for Extron electronics SF 228T
-
Page 1: Planning The Installation
Power down all attached devices before proceeding. Remove the 2 feet x 2 feet ceiling tile where the SF 228T will be installed. If the ceiling has 2 feet x 4 feet tiles, Terminal Cover Plate remove the tile and cut it in half. - Page 2 In the 70 V or 100 V distribution system block diagram below, an optional speaker has been added as an example of daisy chaining SF 228T speakers to a single amplifier output. Connect cables from the amplifier to the proper...
- Page 3 Complete the Installation Flip the terminal cover plate back so the transformer side is in, Extron then replace the cover and tighten the two cover plate screws SF 228T loosened in step 3. Two-way Ceiling Speakers Test the system and speakers by powering on the amplifier and listening for the correct response from the speakers, then disconnect power from the amplifier.
- Page 4 For additional support lines repeat as CAUTION: Repeated bending of the tab may needed. Refer to the SF 228T User Guide cause it to break off. for further details. Replace the ceiling tile. Check all wiring before powering up the amplifier.
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