annunciation at the control panel, and tripping of the [master box]
[transmitter] and sounding of building evacuation alarms. Each detector
shall have a visible indicator lamp that shall flash when the detector is
in the normal standby mode and shall glow continuously when the detector is
activated. Provide remote indicator lamp for each detector. Permanently
label remote indicator with description or number of associated air
handling unit(s). Provide each detector with a remote test switch. Mount
switch not more than 1.8 m 6 feet above finish floor. Permanently label
test switch with description or number of associated air handling unit(s).
[2.2.6
Projected Beam Smoke Detector
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NOTE: Projected beam detectors are specialized
devices best suited for use in large open areas such
as atriums, high bay buildings, and cathedrals.
They also have applications in protection of
specialized industrial hazards. Consult with the
EFD/EFA Fire Protection Engineer before specifying
projected beam detectors. Always specify separate
zones for projected beam detectors under paragraph
titled "Initiating Zones".
**************************************************************************
Provide projected beam smoke detectors to protect [the [rooms] [spaces]
[hazards] indicated] [_____]. Detectors and associated controls shall be
compatible with the main control panel and shall be suitable for use in a
supervised circuit. Detector circuits shall be of the 4-wire type, whereby
the detector operating power is transmitted over conductors separate from
the initiating circuit. Provide a separate, fused power circuit for each
smoke detection initiating circuit. Failure of the power circuit shall be
indicated as a trouble condition on the initiating circuit. Malfunction of
the detector or its control unit or blockage of the projected beam shall
cause operation of the system trouble signals. Install detectors in
accordance with NFPA 72, the manufacturer's instructions, and UL listing or
FM approval, with project beams parallel to ceilings. Beam length and
distance between adjacent beams, and distance between beams and walls,
shall not exceed the maximum permitted by the equipment listing. Do not
use mirrors to alter the direction of the projected beam.
]2.2.7
Notification Appliances
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NOTE: Specify recessed appliances in buildings
where tampering is likely (e.g. BEQs).
**************************************************************************
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NOTE: Base-wide uniformity of alarm signals is
highly desirable. The designer shall contact the
Base Fire Chief to determine which type of alarm
device (bell or horn) is most commonly in use. For
high noise areas, the designer shall consider
increasing the number of devices or the additional
use of sirens, high power strobes, etc. as
supplemental signal devices. Examples of high noise
areas include foundries, machine shops, printing
plants, aircraft hangar bays, and in some cases,
large computer rooms.
SECTION 13852N
Page 27
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