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Optional Components
Supervised Smoke Detector
Model 8520
The AT&T Supervised Smoke Detector is a
photoelectric type, designed to detect a fire in its
early stages so that you can escape from your
house before smoke reaches a dangerous con-
centration level. When the detector senses smoke
particles, it simultaneously sounds an alarm (using
a built-in siren) and sends an alarm to the Com-
munication Control Unit.
During normal operation, the
On/Alarm
light in the
center of the smoke detector flashes once every 7
seconds. During an alarm, it
remains
lighted.
NOTE: When the smoke detector batteries are
low, a built-in horn beeps once every 14 seconds.
If the batteries are not replaced, the smoke
detector will send a Trouble message to the
Communication Control Unit. See the following
page for instructions on battery replacement.
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0
A
Typical Multi-Floor Installation
Smoke detector for minimum protection
Smoke detector for additional protection
Heat-activated detectors
NFPA
Recommendations for Detector
Installation
The National Fire Protection Association’s Stan-
dard 74, Section
2-1,
reads as follows:
2-1 .1 . 1 S: .l : Smo
ke detectors shall be installed outside
of each separate sleeping area in the immediate
vicinity of the bedrooms and on each additional
story of the family living unit, including basements
and excluding crawl spaces and unfinished attics.
The provisions of 2-l
.1
.1 represent the minimum
number of detectors required by this standard. It is
recommended that the householder consider the
use of additional smoke or heat detectors for
increased protection for those areas separated by
a door from the areas protected by the required
smoke detectors under 2-l .1
.1
above. The recom-
mended additional areas are: living room, dining
room, bedroom(s), kitchen, attic (finished or
unfinished), furnace room, utility room, basement,
integral or attached garage, and hallways not
covered under 2-l .1
.1
above. However, the use of
additional detectors remains the option of the
householders.
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