3. When rigid conduit is used, the conduit should not be clamped closer than five feet from the
horn to prevent damping the vibrations of the horn.
4. Rags or other objects should not be put into projector to muffle the sound output as any
interference with the air flow in the projector will cause electrical damage to the horn
mechanism.
C. Electrical Connections.
WARNING
To avoid electrical shock hazards, do not connect wires when power is applied.
Wiring must comply with Article 500 of the National Electrical Code and the local authority
having jurisdiction.
To complete the electrical connections, proceed as follows:
CAUTION
Do NOT loosen or remove the clamp ring or any of the six screws on the front of the horn housing.
Loosening or removing any of the screws may disturb the factory adjustment of the horn
mechanism and cause a horn malfunction. In addition, the horn mechanism may be damaged.
Use a method approved by local building codes and connect horn wires to supply wires.
If required by local building codes, provisions for attaching an earth ground are included.
CAUTION
All power wiring to all models must be routed through conduit and fittings approved for
explosion-proof installation.
III. MAINTENANCE.
SAFETY MESSAGE TO MAINTENANCE PERSONNEL
• Read and understand all instructions before performing any maintenance to this unit.
• To reduce the risk of electrical shock or ignition of hazardour atmospheres, do not perform
maintenance/service on this device when circuits are energized.
• Optimum sound distribution will be reduced if speaker becomes clogged with a foreign substance.
Periodic checks should be performed to ensure foreign substances are not packed into the speaker.
• Any maintenance to the unit MUST be performed by a trained electrician in accordance with NEC
Guidelines and local codes.
• Never alter the unit in any manner. Safety in hazardous locations may be endangered if additional
openings or alterations are made in units specifically designed for use in these locations.
• The nameplate, which may contain cautionary or other information of importance to maintenance
personnel, should not be obscured if exterior of housings used in hazardous locations are painted.
Failure to follow all safety precautions and instructions may result in property damage, serious
injury, or death to you or others.
The horn mechanism contains no user serviceable parts. Therefore, to avoid compromising the
explosion-proof integrity of the horn, do NOT remove the horn mechanism from the horn
housing.
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