above those specified in the paragraph entitled "Annunciation Zones" shall
be provided if required to meet the above requirements. Calculations
showing compliance with the specified power consumption limitation
requirements shall be submitted.] The manufacturer's data submitted under
the paragraph entitled "Manufacturer's Catalog Data" shall clearly indicate
the compatibility of the detectors with the control panel provided and the
maximum number of detectors permitted per zone. Malfunction of the
electrical circuits to the detector or its control or power units shall
result in the operation of the system trouble signals. Each detector shall
contain a visible indicator lamp that flashes when the detector is in the
normal standby mode and glows continuously when the detector is activated.
[Remote indicator lamp shall be provided for each detector located above
ceilings, beneath raised floors, or otherwise concealed from view.] Each
detector shall be the plug-in type with tab-lock or twist-lock, quick
disconnect head and separate base in which the detector base contains screw
terminals for making wiring connections. Detector head shall be removable
from its base without disconnecting wires. Removal without disconnecting
any wires. Removal of detector head from its base, shall cause activation
of system trouble signals. Each detector shall be screened to prevent the
entrance of insects into the detection chambers.
2.7.1.1
Ionization Detectors
Multiple chamber type which is responsive to both visible and invisible
products of combustion. Detectors shall not be susceptible to operation by
changes in relative humidity.
2.7.1.2
Photoelectric Detectors
Operate on a multiple cell concept using a light-emitting diode (LED) light
source.
2.7.2
Spot Heat Activated Detectors
Provide detectors for [surface] [flush] outlet box mounting. Support
detectors independently of conduit, tubing, or wiring connections.
Detectors shall be completely metal enclosed and shall be [combination
fixed temperature and rate-of-rise] [fixed temperature and rate
compensated] [_____] type. Contacts shall be self-resetting after
[response to rate-of-rise] actuation. [Operation under fixed temperature
actuation shall result in an indication which may be noted by external
visual inspection of the detector, or the detector may be the
self-resetting type.] Provide fixed temperature type detectors in areas
subject to abnormal temperature changes. [Furnish a portable electric
device suitable for testing the detectors.]
2.7.3
Detector Spacing and Location
NFPA 72, the manufacturer's recommendations, and the requirements stated
herein. Spacing and location of detectors shall take into account the
airflow into the room and supply diffusers. Detectors shall not be placed
closer than 1.50 meters 5 feet from a discharge grill. [Spacing of
detectors under raised floors shall not exceed [23.20 square meter] [250
square feet] [_____] per detector.] Detectors installed beneath raised
floors shall be mounted with the detector base within 50 mm 2 inches of the
underside of the raised floor framing, with the detector facing downward.
Where the space under the raised floor is less than 305 mm 12 inches in
height, detectors shall be mounted with their bases in the upper half of
the underfloor space. Under no circumstances shall detectors be mounted
SECTION 13961N
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