Code 3 LFAMP User Manual
Introduction
The LFAMP is intended for use as a Secondary Acoustical Warning Device for use with your standard Code 3
siren. The LFAMP generates a penetrating low frequency tone which, when used in conjunction with your
standard Code 3 siren, may help to alert others to the approach of an emergency vehicle. The LFAMP
should be used only in conjunction with the normal operation of your standard Code 3Ò siren. The
standard siren must be used as your primary acoustical warning device.
The LFAMP is intended for use as a secondary acoustical warning device
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WARNING!
only. The LFAMP Secondary Acoustical Warning Device does not meet the
requirements of SAE J1849 and California Title 13. The LFAMP must be
installed in addition to an approved Code 3Ò siren system, otherwise the
vehicle may not comply with state and local regulations.
• This siren is not a substitute for a compliant siren.
• This siren must be used in conjunction with a siren that meets local
regulations.
• Consult your local regulations to ensure compliance.
• This siren, when used in conjunction with a compliant siren
extends the range of frequencies broadcasted, improving warning
effectiveness.
Standard Features
The LFAMP Secondary Acoustical Warning Device consists of a remotely mounted amplifier which is activated
by the InterClear® output of your Code 3
The following features are standard in the LFAMP Secondary Acoustical Warning Device:
Instant-On- There is no " ON/OFF " switch. When installed in accordance with this manual, the device will
operate automatically when the InterClear® output of the primary siren is active. Refer to the primary siren's
User Manual for detailed information on the operation of the InterClear® output.
All devices should be mounted in accordance with the manufacturer’s instructions and securely
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WARNING!
fastened to vehicle elements of sufficient strength to withstand the forces applied to the device. Ease
of operation and convenience to the operator should be the prime consideration when mounting the
siren and controls. Adjust the mounting angle to allow maximum operator visibility. Do not mount the
Control Head Module in a location that will obstruct the drivers view. Mount the microphone clip in a
convenient location to allow the operator easy access. Devices should be mounted only in locations
that conform to their SAE identification code as described in SAE Standard J1849. For example,
electronics designed for interior mounting should not be placed underhood, etc. Controls should be
placed within convenient reach* of the driver or if intended for two person operation the driver and/or
passenger. In some vehicles, multiple control switches and/or using methods such as “horn ring
transfer” which utilizes the vehicle horn switch to toggle between siren tones may be necessary for
convenient operation from two positions.
siren.
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Status LEDs - A green indicator LED, visible on the front of the LFAMP, indicates that the device is on when
lighted. The green LED will be lighted only when the REMOTE input is active (+12VDC). A red indicator LED
indicates that the LFAMP is in protect mode due to a fault condition such as over heating due to a shorted
speaker or speaker wires.
Remote Switching - The LFAMP Secondary Acoustical
Warning Device requires a positive signal from the
primary siren's InterClear® output to remotely activate
the low frequency tone.
Unpacking & Pre-installation
After unpacking your LFAMP Secondary Acoustical
Warning Device, carefully inspect the unit and
associated parts for any damage that may have been
caused in transit. Report any damage to the carrier
immediately.
Figure 1, LFAMP
Sirens are an integral part of an effective audio/visual emergency warning system.
However, sirens are only short range secondary warning devices. The use of a siren
does not insure that all drivers can or will observe or react to an emergency warning
signal, particularly at long distances or when either vehicle is traveling at a high rate
of speed. Sirens should only be used in a combination with effective warning lights
and never relied upon as a sole warning signal. Never take the right of way for
granted. It is your responsibility to be sure you can proceed safely before entering an
intersection, driving against traffic, or responding at a high rate of speed.
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WARNING!
SIREN PRODUCTS:
The effectiveness of this warning device is highly dependent upon correct mounting
and wiring. Read and follow the manufacturer’s instructions before installing or using
this device. The vehicle operator should check the equipment daily to insure that all
features of the device operate correctly.
To be effective, sirens must produce high sound levels that potentially can inflict
hearing damage. Installers should be warned to wear hearing protection, clear bystanders from the area and not to operate the siren indoors during testing. Vehicle
operators and occupants should assess their exposure to siren noise and determine
what steps, such as consultation with professionals or use of hearing protection
should be implemented to protect their hearing.
This equipment is intended for use by authorized personnel only. It is the user’s
responsibility to understand and obey all laws regarding emergency warning devices.
The user should check all applicable city, state and federal laws and regulations.
Code 3, Inc., assumes no liability for any loss resulting from the use of this warning
device.
Proper installation is vital to the performance of the siren and the safe operation of the
emergency vehicle. It is important to recognize that the operator of the emergency
vehicle is under psychological and physiological stress caused by the emergency
situation. The siren system should be installed in such a manner as to: A) Not reduce
the acoustical performance of the system, B) Limit as much as practical the noise
level in the passenger compartment of the vehicle, C) Place the controls within
convenient reach of the operator so that he can operate the system without losing eye
contact with the roadway.
Emergency warning devices often require high electrical voltages and/or currents.
Properly protect and use caution around live electrical connections. Grounding or
shorting of electrical connections can cause high current arcing, which can cause
personal injury and/or severe vehicle damage, including fire.
PROPER INSTALLATION COMBINED WITH OPERATOR TRAINING IN THE
PROPER USE OF EMERGENCY WARNING DEVICES IS ESSENTIAL TO INSURE
THE SAFETY OF EMERGENCY PERSONNEL AND THE PUBLIC.
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