Code 3 Remote Compact Siren - Manual (Page 5)

5
Speaker Connections
The siren is designed with a single 100 Watt speaker. Do not connect a speaker which is not rated at
100W, 11 ohms.
CONNECTION OF A 58 WATT SPEAKER TO THE 100 WATT TERMINAL WILL CAUSE
THE SPEAKER TO BURN OUT, AND WILL VOID THE SPEAKER WARRANTY!
The sound projecting opening should be pointed forward, parallel to the ground, and not
obstructed or muffled by structural compounds of the vehicle. Concealed or underhood
mounting in some cases will result in a dramatic reduction in performance. To minimize this
reduction, mount the speaker so the sound emitted is projected directly forward and
obstruction by vehicle compounds such as hoses, brackets, grille, etc. is minimized.
Electromechanical sirens and electronic siren speakers should be mounted as far from the
occupants as possible using acoustically insulated compartments and isolation mountings to
minimize the transmission of sound into the vehicle. It may be helpful to mount the device on
the front bumper, engine cowl or fender; heavily insulate the passenger compartment; and
operate the siren only with the windows closed.
Each of these approaches may cause significant operational problems, including loss of siren
performance from road slush, increased likelihood of damage to the siren in minor collisions,
and the inability to hear the sirens on other emergency vehicles. APPROPRIATE TRAINING
OF VEHICLE OPERATORS IS RECOMMENDED TO ALERT THEM TO THESE
PROBLEMS DURING OPERATIONS.
WARNING!
!
IMPORTANT WARNINGS TO USERS OF SIRENS: "Wail" and "Yelp" tones are in some
cases (such as in the state of California) the only recognized siren tones for calling for the
right of way. Ancillary tones such as "Air Horn", "Hi-Lo", and "Hyperlo" in some cases do not
provide as high a sound pressure level. It is recommended that these tones be used in a
secondary mode to alert motorists to the presence of multiple emergency vehicles or to
momentarily shift from the primary tone as an indication of the imminent presence of an
emergency vehicle.
Any electronic device may create or be affected by electromagnetic interference, After
installation of any electronic device, operate all equipment simultaneously to insure that
operation is free from interference.
WARNING!
!
Siren Operation
The Model 3920 siren is remotely controlled either from the siren's control panel, SCROLL switch or (if
connected) the vehicle's horn switch. The siren tone will change each time the control switch is pressed (Wail,
Yelp, HyperYelp). The siren will change to "Air Horn" mode if the control switch is held. From the Standby
mode a short momentary push on the control switch will produce the wail siren tone. With each successive
momentary signal on the remote input line, the siren scrolls to the next tone. The normal sequence of tones
is: Wail, Yelp and HyperYelp. Holding the switch for a prolonged period will produce "Air Horn". Each push
on the vehicles horn switch will also sound vehicles horn as wired in Figure 2. It is recommended that
customers use auxiliary switch and horn transfer relay(both optional equipment).
"Instant On" Feature
As a result of the "Instant On" design, the siren is ready for operation whenever +12Vdc power is supplied.
To restrict operation of the siren when the vehicle is off, connect the siren to an ignition controlled +12Vdc
supply line.
NOTE: The "Instant On" design of the siren keeps the unit powered and ready to operate when the vehicle
ignition is ON. Depressing the "OFF" button momentarily removes power from the siren.
When the "OFF" button is released power is restored and the siren reverts to standby mode.
IMPORTANT WARNINGS TO USERS OF SIRENS: "Wail" and "Yelp" tones are in some
cases (such as in the state of California) the only recognized siren tones for calling for the
right of way. Ancillary tones such as "Air Horn", "Hi-Lo", and "Hyperlo" in some cases do not
provide as high a sound pressure level. It is recommended that these tones be used in a
secondary mode to alert motorists to the presence of multiple emergency vehicles or to
momentarily shift from the primary tone as an indication of the imminent presence of an
emergency vehicle.
WARNING!
!