Quantcast Duct Smoke Detectors - aeg_fe0357

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Custom Search Placement:  Do not locate smoke detectors where they may be
subject to false alarms (closets, storage rooms, janitor's closets, laundry
rooms, toilets, kitchens, electrical and mechanical rooms, unfinished ceiling
spaces or lobbies or vestibules adjacent to exterior doors).
In rooms where forced ventilation is present, locate Ventilation:
smoke detectors no closer
than three feet from all supply air 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  o the installation of a single station 120 Vac smoke
detector, plus a 135 F rated heat detector connected to the building fire
alarm system. Duct Smoke Detectors:  Show duct smoke detectors 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-100BA, Paragraph
2-11.2.3 (dated 31 March 1988). Air Force project, duct detection shall be in
accordance with NFPA 90A (1989 edition).  On contract drawings, provide
typical details for location of duct detectors in air handling equipment. Sleeping rooms shall include the installation of single station,
120 Vac smoke detectors.
1.4.7 Mounting Details:  Where under floor 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 underfloor
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.
Placement:  Locate the FACP just inside a main building entrance
in a visible accessible location.  Where annunciation is needed, this shall be
located in the FACP.  The intent of this is to allow fire departments to
rapidly pinpoint activated alarm location.  Remote annunciation may also be
provided at designer's discretion.  Consider recess mounting and interior
color coordination.
Power Supply:  The FACP power shall be taken from the line side of
the main building cutoff unless it is fed by an emergency generator.


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