13
Installation
Description, Specications, Installation, and Service Manual
Assuming a typical 10 dB loss per distance doubled and a 70 dB minimum sound
level required to warn a typical urban area, the effective range of a MOD6024B is
approximately 3,900 feet.
Optimum warning is obtained when the warning signal is at least 10 dB above ambient.
Do not expose personnel to sound levels above 123 dBC.
Wind speed and direction often affects the propagation of sound from the siren.
Consequently, the direction of the prevailing wind may be a signicant factor to consider
when selecting the installation site(s) of a small, one- or two-site siren system. For
example, if the prevailing wind is from the west, it may be desirable to install the siren
toward the western edge of the area to be covered.
Other factors to consider when selecting the installation site(s) include the availability
of suitable electrical power, the access to and ease of installation and maintenance, the
height of surrounding obstructions, and security against vandalism and any applicable
state or local noise control ordinance.
Installing the Sirens
Electrocution or severe personal injury can occur when making electrical
connections, drilling holes, or lifting equipment. Therefore, experienced
electricians, in accordance with national and local electrical codes, acting
under the direction of the installation crew safety foreman, should perform
installation.
Most siren installations are one of two types: Pole Mount or Flat Surface Mount. These
two congurations make it possible to install a siren in almost any situation. If the
installations in this section are not suitable, modication of one of the congurations may
be practical.
A siren is typically installed 40 to 50 feet above the ground. If the installation is located
less than 40 feet above the ground, the sound intensity at close range may increase, but at
the same time the effective range of the siren may be reduced. Conversely, if the siren is
located more than 50 feet above ground, the effective range of the siren may increase, but
the sound may skip over areas closer to the siren. These variables may make it desirable
to test the sound coverage of the siren at various heights and locations whenever possible.
NOTE: To protect the speaker arrays from damage during shipping, all models have been
shipped without drivers installed.
Connecting the Driver Wires
After uncrating the siren, connect the driver wires:
1. Remove the four (4) driver access doors from each individual active module by
removing the four (4) bolt and washer sets of each door. Note the position of the at
washer and lock washer.
2. Thread the drivers clockwise onto the horn throats.
To Next Page
Loading...
Need help?
General
