EGC-HDVM EDWARDS SIGNALING PRODUCTS, EGC-HDVM Datasheet - Page 2

• Manufacturer Part Number: EGC-HDVM
• Description: 20H5958
• Manufacturer: EDWARDS SIGNALING PRODUCTS

Dimensions
Application
Genesis strobes are UL 1971-listed for use indoors as ceiling-
mounted public-mode notification appliances for the hearing
impaired. Prevailing codes require strobes to be used where ambi-
ent noise conditions exceed 105 dBA (87dBA in Canada), where
occupants use hearing protection, and in areas of public accom-
modation as defined in the Americans with Disabilities Act (see
application notes – USA).
Combination horn-strobe signals must be installed in accordance
with guidelines established for strobe devices.
Strobes
Genesis strobes are UL 1971-listed for use indoors as wall-mounted
public-mode notification appliances for the hearing impaired. Prevail-
ing codes require strobes to be used where ambient noise conditions
exceed specified levels, where occupants use hearing protection,
and in areas of public accommodation. Consult with your Authority
Having Jurisdiction for details.
All Genesis strobes exceed UL synchronization requirements
(within 10 milliseconds other over a two-hour period) when used
with a synchronization source. Synchronization is important in
order to avoid epileptic sensitivity.
Horns
Genesis horn output reaches as high as 99 dB (peak) and
features a unique multiple frequency tone that results in excel-
lent wall penetration and an unmistakable warning of danger. All
models may be configured for either coded or non-coded signal
circuits. They can also be set for low dB output with a jumper cut
that reduces horn output by about 5 dB.
The suggested sound pressure level for each signaling zone used
with alert or alarm signals is at least 15 dB above the average ambient
sound level, or 5 dB above the maximum sound level having a duration
of at least 60 seconds, whichever is greater, measured 5 feet (1.5 m)
above the floor. The average ambient sound level is, A-weighted sound
pressure measured over a 24-hour period.
Doubling the distance from the signal to the ear will theoretically
result in a 6 dB reduction of the received sound pressure level.
The actual effect depends on the acoustic properties of materials
in the space. A 3 dBA difference represents a barely noticeable
change in volume.
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NOTE: The flash intensity of some visible signals may not be adequate
to alert or waken occupants in the protected area. Research indicates
that the intensity of strobe needed to awaken 90% of sleeping persons
is approximately 100 cd. Edwards recommends that strobes in sleeping
rooms be rated at at least 110 cd.
WARNING: These devices will not operate without electrical power. As
fires frequently cause power interruptions, further safeguards such as
backup power supplies may be required.
(173 mm)
6.8" dia.
0.60"(15 mm)
(25 mm)
1.0"
Installation and Mounting
All models are intended for indoor wall or ceiling applications
only. Horn-strobes mount to any flush North-American 4” square
electrical box.
Genesis ceiling horn-strobes simply unlatch and twist to open.
This gains access to mounting screws and the selectable candela
switch. The shallow depth of Genesis devices leaves ample room
behind the signal for extra wiring. Once installed with the cover in
place, no mounting screws are visible.
Edwards recommends that these fire alarm horn-strobes always
be installed in accordance with the latest recognized edition of
national and local fire alarm codes.
Field Configuration
Depending on the model, Genesis horn-strobes may be set for 15
to 95, or 95 to 177 candela output (see ordering information). The
output setting is changed by simply opening the device and sliding
the switch to the desired setting. The horn-strobe does not have
to be removed to change the output setting. The setting remains
visible through a small window on the front of the device after the
cover is closed.
The horn-strobe comes factory set for high dB output. Low dB
output may be selected by cutting a jumper on the circuit board.
This reduces the output by about 5 dB.
Wiring
Field wiring terminals accommodate #18 to #12 AWG (0.75 mm²
to 2.5 mm²) wiring. Horn/strobes are interconnected with a single
pair of wires as shown below.
Not to be used for installation purposes.
D A T A S H E E T
S85001-0559
Issue 9