FIRE ALARM SPEAKERS
EDWARDS SYSTEMS TECHNOLOGY
Re-entrant Horn Speakers
CSVT/CSVTF Series
Features
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STRONG NORYL HOUSING
1/2 TO 7-1/2 WATTS
70 VOLT DC
INCLUDES SUPERVISORY CAPACITOR
REFLECTIVE/HIGH OUTPUT SOUND PATH
TEMPERATURE RATED LOUDSPEAKER ASSEMBLY
SURFACE, SEMI-FLUSH OR FLUSH MOUNT
WEATHER-SEALED DESIGN
VANDAL RESISTANT
CORROSION RESISTANT
VOICE OR TONE SIGNALS
Description
The CSVT/CSVTF series Re-entrant Horn Speakers provide
reliability, efficiency, audio intelligibility, installation options
and the unobtrusive size required for application within
today’s fire alarm, communications end electronic signalling
systems.
The unique cone loudspeaker and integral re-entrant
protective dome built into the housing, assure optimum
output. All models include a DC blocking capacitor for
supervision, an 8 Ohm coil, and 70.7 Volt DC transformer.
The CSVT-27UCR and CSVTF-27UCR are provided with
1/2, 1 and 2 watt taps. The CSVT-77UCR and CSVTF77UCR are provided with 1, 2, 4, 7-1/2 watt taps. All models
use a movable wire lead/spade terminal for wattage selection and field wiring connections are made to colour-coded
wire leads.
Environmental resistance allows the CSVT/CSVTF series
speakers to be used in the most demanding areas. The
specially treated and temperature rated loudspeaker
assembly along with the rugged weather-sealed Noryl
housing provides resistance from moisture, heat, corrosion,
vibration and vermin. The textured “Fire Red” finish is
molded right into the housing for added durability and
corrosion protection.
CSVT - Surface Mount: Surface mount CSVT models are 41/4" (108mm) sq. x 3-1/8" (80mm) deep. They will surface
mount using the SIR Surface Box for indoor applications or
using the SER Weatherproof Surface Box for outdoor
installation. When using the SFPR Mounting Plate, the
CSVT models semi-flush mount over a standard NorthAmerican 4" square 2-1/8' (54mm) deep electrical box which
has been installed flush to the surface. The CSVT surface
mount models also can be mounted to the TVTAR Bi-directional
Mounting Frame for corridor 2-way applications.
CSVTF Series
CSVT Series
CSVTF - Flush Mount: Flush mount CSVTF models are 6"
(150mm) sq. x 2" (51mm) deep. The CSVTF models can be
installed flush mounted using EST Cat. No. 46292-1194.
Flush Mount Box.
Ordering Information
Catalogue
Number
Description
Ship
Wt.
(kg)
CSVT-27UCR
Re-entrant Horn Speaker - ½, 1 & 2
Watt Taps, Surface Mount
0.7
CSVT-77UCR
Re-entrant Horn Speaker - 1, 2, 4 &
7-½ Watt Taps, Surface Mount
0.7
CSVTF-27UCR Re-entrant Horn Speaker - ½, 1 & 2
Watt Taps, Flush Mount
0.7
CSVTF-77UCR Re-entrant Horn Speaker - 1, 2, 4 &
7-½ Watt Taps, Flush Mount
0.7
Accessories
SIR
Surface Mount Backbox - Indoor
Use, for CSVT Series Only
0.3
SER
Surface Mount Backbox Weatherproof, for CSVT Series
Only
0.5
SFPR
Semi-Flush Mounting Plate - for
CSVT Series Only
0.2
TVTAR
Bi-directional Mounting Frame - for
CSVT Series Only
2.0
45001-1584
Blank Cover Plate - use when only
one speaker is mounted on TVTAR
0.2
45292-1194
Flush Mount Backbox - for CSVTF
Series Only
0.4
EDWARDS SYSTEMS TECHNOLOGY
SARASOTA, FLA. 941-739-4200 Fax: 941-727-0740
CHESHIRE, CT. 203-699-3000 Fax: 203-699-3108
OWEN SOUND, CANADA 519-376-2430 Fax: 519-376-7258
INTERNATIONAL: CANADA 905-270-1711 Fax: 905-270-9553
PITTSFIELD, ME. 207-487-3104
85001-0181
1 of 4 Iss. 1
Specifications
Catalogue Number
Mounting
CSVT-27UCR
CSVTF-27UCR
CSVT-77UCR
CSVTF-77UCR
Surface or Semi-flush
Flush
Surface or Semi-flush
Flush
Wattage Taps
½, 1, 2
1, 2, 4, 7-½
Frequency
400 to 4000 Hz
Operating Voltage
70.7 Volts DC
Voice Coil Impedance
8 Ohms
Sound Dispersion
150 Degrees
Ambient Operating Temperature
-30°F to 150°F (-35°C to 66°C)
Wiring Connection
6 inch (150mm) Colour-coded Wire Leads
Housing Material/Finish
Molded Noryl 190 Plastic With Texture Red Finish
Approvals
ULC
dBA Sound Pressure Level Table - CSVT/CSVTF Series
Distance
7-½ Watt
4 Watt
2 Watt
1 Watt
½ Watt
4' (1.2m)
105
102
99
96
93
10' (3M)
97
94
91
88
85
15' (4.5m)
94
91
88
85
82
20' (6m)
91
88
85
82
79
30' (9m)
88
85
82
79
76
40' (12m)
85
82
79
76
73
CSVT/CSVTF
Sound Dispersion
CSVT/CSVTF
dB Output
EDWARDS SYSTEMS TECHNOLOGY
SARASOTA, FLA. 941-739-4200 Fax: 941-727-0740
CHESHIRE, CT. 203-699-3000 Fax: 203-699-3108
OWEN SOUND, CANADA 519-376-2430 Fax: 519-376-7258
INTERNATIONAL: CANADA 905-270-1711 Fax: 905-270-9553
PITTSFIELD, ME. 207-487-3104
85001-0181
2 of 4 Iss. 1
Installation
EST recommends that the signalling appliances always be installed in accordance with the latest recognized editions of local
fire alarm codes.
All Dimensions are shown in inches and (Millimeters)
ATTENTION:
WHEN MOUNTING CHECK THE
POSITION OF THE MOUNTING BOX TO
ENSURE CORRECT INSTALLATION OF
THE HORN SPEAKER. NOTE THE
ALIGNMENT OF THE MOUNTING
SCREWS ON THIS DRAWING.
Wattage Selection
Typical Wiring - 70V dc
EDWARDS SYSTEMS TECHNOLOGY
SARASOTA, FLA. 941-739-4200 Fax: 941-727-0740
CHESHIRE, CT. 203-699-3000 Fax: 203-699-3108
OWEN SOUND, CANADA 519-376-2430 Fax: 519-376-7258
INTERNATIONAL: CANADA 905-270-1711 Fax: 905-270-9553
PITTSFIELD, ME. 207-487-3104
85001-0181
3 of 4 Iss. 1
Application Data
(The following was taken in part from the Canadian Fire
Alarm Association - Fire Alarm Systems - A Reference
Manual - Revised Edition 1988)
AUDIBLE SIGNALS
Refer to CAN 4-S524 Standard for the installation of Fire
Alarm Systems.
When a fire alarm system is required in any portion of a
building. It must be installed so that the sound from the
audible signal appliances will be intelligibly heard throughout the building. This means that a sufficient quantity of
audible signal appliances should be installed in each
corridor and in such other locations as may be required, and
that they should be sufficiently loud so as to be intelligibly
heard by all occupants within the area served by the
appliances.
The audible signal appliances should be used only for the
purpose of signalling an emergency condition and the alarm
and alert signals shall be readily distinguishable from each
other and from other signals which may be sounded in the
building.
Suggested sound pressure levels in each signalling zone
are: for alarm or alert signals at least 15 db above the
ambient sound level or 5 db above the maximum sound
level having a duration of at least 60 seconds whichever is
greater, measured 1500 millimetres above the floor.
Industry practice suggests that 150mm diameter bells
provide acceptable coverage for a circular area of 400
square metres maximum. Spacing between bells would be
approximately 20 metres maximum. For a 250mm diameter
bell the maximum circular area coverage is 900 square
metres. Spacing between bells would be 30 metres maximum.
Usually, better sound distribution can be achieved by
carefully positioning a larger quantity of smaller signals than
a smaller quantity of larger signals. Even though no industry figures are available, mounting signal appliances in flush
wall boxes with grilles, or mounting them above drop
ceilings will dramatically reduce the sound level in the
occupied area and a greater concentration of signal appliances will be required to produce the necessary sound
levels.
Other factors in the installation planning should be the type
of building materials (wood, concrete, etc.) as well as the
number of partitions and the type of furniture, carpeting and
draperies, all of which can have an enormous deadening
effect on sound.
Audible signal appliances should be mounted in such a
manner that the centre of the appliance will be not less than
1800 millimetres above the floor level.
To ensure audibility when using speakers, the sound level
output of any speaker must be a minimum of 15 db above
the ambient noise level of the area to be covered. Doubling
the power output of the speaker (from 1 watt to 2 watts) will
Increase the sound level by three db. A three db difference
in sound pressure level is just a noticeable increase in
volume.
Doubling the distance from a signal will theoretically cause
a six db reduction in the received sound pressure level. The
actual level will vary slightly depending on the shape and
acoustic qualities of the area.
In narrow areas (hallways) with reflective surface, the
reduction will be less, whereas in open areas with sound
absorbing materials (carpets/rugs/soft furniture) the reduction will be greater.
Sound penetration from one area to another, corridors to
rooms as an example, depends very much on the construction of the building. Modern buildings are being constructed
with much improved sound isolation between corridors and
occupied areas and this results in poor sound penetration
by corridor - mounted alarm signalling devices. Any solid
door will reduce the level of sound reaching the room by 25
to 30 db. To raise the sound output level of corridor devices
enough to penetrate into occupied areas would result in
corridor sound pressure levels that could cause discomfort
to people in the corridor. A practical solution is to install
signals (normal power) in all parts of the floor area.
The cone type speaker unit generally has a broader frequency range and higher fidelity (less distortion) than horn
type speakers. The cone type speaker however cannot
handle as much power (practical limit of about four to six
watts) without introducing too much distortion. The horn
speaker can handle much higher db output and is more
useful for high ambient noise areas such as industrial
plants, garages and large open or outdoor areas.
EDWARDS SYSTEMS TECHNOLOGY
SARASOTA, FLA. 941-739-4200 Fax: 941-727-0740
CHESHIRE, CT. 203-699-3000 Fax: 203-699-3108
OWEN SOUND, CANADA 519-376-2430 Fax: 519-376-7258
INTERNATIONAL: CANADA 905-270-1711 Fax: 905-270-9553
PITTSFIELD, ME. 207-487-3104
85001-0181
4 of 4 Iss. 1
It is our intention to keep the product information current and
accurate. We can not cover specific applications or anticipate
all requirements. All specifications are subject to change without notice. For more information or questions relative to this
Specification Sheet, contact EST.
© 1996 EST
Printed in Canada