Quantcast Duct Smoke Detectors - aeg_fe0403

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Custom Search Placement:  Do not locate smoke detectors where they may
b e subject to false alarms (closets, storage rooms. janitor's closets,
laundry rooms, toilets, kitchens, electrical & mechanical rooms.
u n f i n i s h e d ceiling spaces or lobbies or vestibules adjacent to
e x t e r i o r doors).
1 . 4 . 6 . 2 Ventilation:  In rooms where forced ventilation is
present. locate smoke detectors no closer than 3 feet from all supply
a i r diffusers.  Locate detectors to favor the air flow toward return
openings while still complying with item 1.4.2 above. Lounge Smoke Detectors:  In lounge areas of BOQs and
BEQs the design shall include the installation of a single station
120 Vac smoke detector, plus a 135oF rated heat detector connected
to the building fire alarm system. Duct Smoke Detectors:  Show duct smoke detectcrs on fire
alarm riser diagrams.  Specifications for. duct detectors shall be in
the fire alarm section and not in the mechanical sections.  Shutdown
of air handling units (AHU) upon alarm of duct smoke detectors shall
be accomplished by the FACP.  Provide supervised disconnect switches
for each AHU shutdown circuit.  On Navy projects, provide duct
detectors as required by MIL-HDBK-1008A. paragraph 2-11.2.3 (dtd 31
March 1989). Air Force projects, duct detection shall be in accordance
with NFPA 9OA (1985 edition).  On contract drawings, provide typical
details for location of duct detectors in air handling equipment.
Underfloor D e t e c t o r s : Mounting Details:  Where underfloor detectors are to be
installed, provide a typical mounting detail on the contract drawings
showing proper mounting location at the top of the underfloor space. Annunciation:  Provide graphic annunciators for
u n d e r f l o o r detectors.  The annunciator shall depict a floor plan
Indicating device and zone locations.  Zones shall also be indicated
by word description.  this does not apply to single-zone systems. All
graphic annunciators shall be provided-with a lamp test feature.
1. 5 . 1
Placement: Locate the FACP just inside a main building
e n t r a n c e in a visible accessible location.  Where annunciation is
needed, this shall be integral with the FACP.  The intent of this is
to allow fire departments to rapidly pinpoint activated alarm
Remote annunciation may also be provided at designer's
d i s c r e t i o n .  Consider recess mounting and interior color coordination.
Power Supply:  The FACP power shall be taken from the
l i n e side of the main building cutoff unless it is fed by an emergency


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