and each such area delineated by reference to room
numbers, space designations, or zones. Where
practicable, such zones should also be delineated on
the drawings. Omit if total flooding system for
underfloor areas is not to be provided.
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Provide uniform discharge to each raised floor space to achieve a
concentration of 0.45 kg 1.0 pound of carbon dioxide for each [0.28 cubic
meter10 cubic feet of underfloor volume in one minute for underfloor
volumes of 56.60 cubic meter 2000 cubic feet or less] [and] [0.34 cubic
meter12 cubic feet of underfloor volume in one minute for underfloor
volumes greater than 56.60 cubic meter 2000 cubic feet, except that minimum
supply of carbon dioxide shall be 91 kg 200 pounds].
[Divide the systems
into [_____] separate areas.
Supply each area with carbon dioxide
through a separate selector valve from the storage tank, so that activation
of the system in one area shall not cause discharge of carbon dioxide into
another area. Area No. 1 shall consist of [_____]. Area No. 2 shall
consist of [_____].]
2.2.1.3
Room Total Flooding Systems
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NOTE: For total flooding of rooms and spaces such
as generator rooms, flammable liquid storage rooms,
rare document vaults, etc., use this paragraph.
Calculating flooding factor IAW NFPA 12. Whenever
possible, provide for automatic closing of openings
and shutting down ventilation systems prior to start
of agent discharge. When this cannot be done,
identify size of openings and capacity of
ventilation systems accordingly.
**************************************************************************
Provide uniform discharge to each space to achieve a flooding factor of one
pound of carbon dioxide for each [_____] cubic meter feet in one minute
[except that minimum supply of carbon dioxide shall be 91 kg 200 pounds].
[Provide additional carbon dioxide discharge as required by NFPA 12 to
compensate for [openings that cannot be closed] [and] [ventilating systems
that cannot be shut down] [and high ambient temperatures of [_____] degrees
C F] [low ambient temperatures of [_____] degrees C F].]
2.2.1.4
Local Application Systems
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NOTE: Use this paragraph for dip tanks, quench
tanks, and similar hazards that cannot be total
flooded because they are not enclosable. Follow
NFPA 12 for design requirements.
**************************************************************************
Provide local application of carbon dioxide for the protection of [______].
Calculate quantity of carbon dioxide required for local application in
accordance with NFPA 12. Base calculations on the total rate of discharge
needed to blanket the [area] [or] [volume] protected, and the time that
discharge must be maintained to ensure complete extinguishment. Minimum
discharge time shall be [30 seconds] [[_____] minute(s)]. Base
calculations on the [rate by area method for flat surfaces] [and] [rate by
volume method for three-dimensional hazards].
SECTION 13962N
Page 14
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