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D. Installation on 4-Inch Speakers.
• Refer to "Warning Message to Installers" packed with this unit. Also, refer to Introduction and
Basic Installation instructions in this instruction sheet before installing device.
• Use only 14 to 18 AWG wire for power connection. Strip no more than 0.25-inch of wire insula-
tion from the ends of the power leads.
1. Remove the two Phillips-head screws from the front of the speaker. Retain the screws.
2. See Figure 5. Using a small pin punch or similar blunt tool, knock out hole "B" from
the rear of the speaker, if a two wire light is being installed. If a four wire light is being
installed, knock out both holes "A" and "B" from the rear of the speaker. If the speaker
is housed in a metal enclosure, use a round file to remove any burrs that may be present.
Figure 5 shows a basic 4-inch speaker enclosure containing no parts other than the speaker.
However, some 4-inch speaker units do include components in addition to the speaker. DO
NOT remove any parts before knocking out the holes indicated in Figure 5.
3. Route power leads through the horn and out of knockout hole "B", see Figure 5. Snap the
front cover of the light off. Route power leads through board assembly as shown in Figure
6. Connect the power leads to the terminals of the two position connector by inserting the
stripped ends of the wire into the connector as far as they can travel, polarity MUST be
observed on DC units. Make sure supply lead insulation is flush with connector. If stranded
wire is used, be sure that there are no loose strands outside the connector plug that could
touch the adjacent lead and cause a short circuit. Replace cover on light, lens should snap
onto board assembly.
4. See Figure 7. Connect the leads to the power source. Polarity on AC units does not matter.
Insulate all splices.
E. Installation of Gasket.
Refer to "Warning Message to Installers" packed with this unit. Also, refer to Introduction and Basic
Installation instructions in this instruction sheet before installing device.
The light can be weatherproofed by installing the supplied gasket and mounting on a weather-
proof horn/speaker, or by using the BCL plate to mount the strobe on a WB backbox. Slots are
provided in the gasket which allow the light wires to pass to the audible device.
The slots can be located by gently pulling on the gasket near the applicable slots (see Figure 8).
Note that there are four slots in the upper-center of the gasket. These slots should be used when
the light is to be installed on a horn or mounting plate. To install, merely run the light wires
through the applicable slots and seat the gasket firmly on the light (see Figure 8).
Refer to the previously described applicable installation instructions.
F. Strobe Tube Replacement.
Disconnect power from the electrical circuit. Wait five (5) minutes before removing lens. Re-
move the screws fastening lens to mounting surface. Snap lens off of mounting plate. Carefully
remove the burnt out strobe tube, it is best to lift from both sides at once.
Replace the new tube making sure all three pins enter the board connectors applying pressure
slowly to ends of tube, preferably the outer leads. Place the outer lens back into position, rein-
stall referring to appropriate previous installation instruction as necessary.
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