final testing, adjustment of the system and to provide instruction to
Government personnel.
1.6
DESIGN OF HALON FIRE EXTINGUISHING SYSTEMS
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NOTE: Delete reference to NFPA 75 only if the
protected space(s) contain no automatic data
processing requirement.
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Design and installation of Halon fire extinguishing systems shall conform
to NFPA 12A, NFPA 70, NFPA 72, [and NFPA 75] and to the requirements as
hereinafter specified.
1.6.1
Piping Layout and Wiring Diagrams
Annotate halon system piping layout with reference points for design. In
field wiring diagrams, show locations of devices and points of the system.
Prepare working drawings on sheets not smaller than A0 1189 x 841 mm 30 by
42 inches, in accordance with the requirements for "Plans" as specified in
NFPA 12A. Include data essential to the proper installation of each system.
1.6.2
Calculations
Submit halon discharge calculations verifying total storage requirements,
flooding concentrations, discharge times, flow through the piping network,
pipe sizes, and nozzle orifice sizes, in accordance with the manufacturer's
listed design manual and NFPA 12A. Submit substantiating battery capacity
calculations showing capacity, supervisory and alarm power requirements.
1.6.3
Flooding Concentration
The system shall totally flood the protected area(s) providing a volumetric
concentration of Halon 1301 of not less than 5 percent nor more than 7
percent at 21 degrees C 70 degrees F.
1.6.3.1
Halon Concentration
The Halon concentration shall be based upon shutting down the heating,
ventilation and air conditioning (HVAC) systems at the time of agent
discharge. The required Halon concentration shall be maintained in the
protected area(s) for a minimum of ten minutes.
1.6.4
Discharge Time
The maximum Halon liquid discharge time shall be 10 seconds.
1.6.5
Reserve Supplies
Each system shall be provided with its own connected reserve supply of
Halon 1301. Each reserve supply shall contain an amount of Halon 1301
equal to the primary supply of the system to which it is connected.
1.6.6
Record Drawings
Upon completion, and before final acceptance of the work, submit a complete
set of as-built (record) working drawings, [including complete as-built
circuit diagrams,] of each Halon 1301 system for record purposes. The
SECTION 13966N
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