Federal Signal Corporation Smart Siren Installation And Maintenance Manual page 8

Chapter 1: Safety Messages for Installers and Operators
Light Hazards
• To be an effective warning device, warning lights produce bright light that can be hazardous to your
eyesight when viewed at close range. Do not stare directly into the lighting product at a close range or
permanent damage to your eyesight may occur.
During Installation
• Do NOT get metal shavings inside the product. Metal shavings in the product can cause the system to
fail. If drilling must be done near the unit, place an ESD approved cover over the unit to prevent metal
shavings from entering the unit. Inspect the unit after mounting to be sure there are no shavings present
in or near the unit.
• Do NOT connect this system to the vehicle battery until ALL other electrical connections are made,
mounting of all components is complete, and you have verified that no shorts exist. If wiring is shorted
to vehicle frame, high current conductors can cause hazardous sparks resulting in electrical fires or
flying molten metal.
• Be sure the siren amplifier/relay module and speaker(s) in your installation have compatible wattage ratings.
• In order for the electronic siren to function properly, the ground connection must be made to the
NEGATIVE battery terminal.
• Sound output will be severely reduced if any objects are in front of the speaker. If maximum sound
output is required for your application, you should ensure that the front of the speaker is clear of any
obstructions.
• Install the speaker(s) as far forward on the vehicle as possible, in a location which provides maximum
signaling effectiveness and minimizes the sound reaching the vehicle's occupants. Refer to the National
Institute of Justice guide 500-00 for further information.
• Mounting the speakers behind the grille will reduce the sound output and warning effectiveness of the
siren system. Before mounting speakers behind the grille, make sure the vehicle operators are trained
and understand that this type of installation is less effective for warning others.
• Sound propagation and warning effectiveness will be severely reduced if the speaker is not facing
forward. Carefully follow the installation instructions and always install the speaker with the projector
facing forward.
• Do NOT install the speaker(s) or route the speaker wires where they may interfere with the operation of
airbag sensors.
• Installation of two speakers requires wiring speakers in phase.
• Never attempt to install aftermarket equipment, which connects to the vehicle wiring, without reviewing
a vehicle wiring diagram available from the vehicle manufacturer. Insure that your installation will not
affect vehicle operation and safety functions or circuits. Always check vehicle for proper operation after
installation.
• Do NOT install equipment or route wiring or cord in the deployment path of an airbag.
• If a vehicle seat is temporarily removed, verify with the vehicle manufacturer if the seat needs to be
recalibrated for proper airbag deployment.
8 PA300-CN Siren Amplifier