Provide pneumatic single acting rate-of-rise heat detectors. All tubing
shall be supervised and installed in protective metal conduit or tubing.
2.4.1
Air Compressor
Shall be automatic, electric motor driven and include piping, pressure
switch, regulator, and tank if required. Provide compressor with a minimum
capacity capable of charging the pneumatic detection system to normal
system pressure in 15 minutes and shall include all controls necessary to
maintain the system fully charged. [Provide at least one compressor for
every [_____] detection circuits.]
2.4.2
Piping and Control Panel
Provide copper piping. Provide a control panel or equivalent device(s) to
automatically maintain the required pneumatic pressure in the detection
system, and limit the quantity of air that enters the detection/release
system. Provide supply air and system air pressure gages.
2.5
PIPING SUPERVISION
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NOTE: Include for projects involving pre-action
sprinkler piping systems or pneumatic detection
systems only.
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[Pre-action sprinkler piping] [and] [pneumatic detection system] shall be
supervised. A break in the piping or tubing systems resulting in loss of
pneumatic pressure shall result in the activation of a trouble signal.
Provide a silencing switch which transfers trouble signals to an indicating
lamp and arrange so that correction of the trouble condition will
automatically transfer the trouble signal from the indicating lamp back to
the trouble signal until the switch is restored to normal position.
2.6
MANUAL RELEASE STATIONS
Provide [combined] overhead system, and monitor nozzle release stations
where shown, and separate hose station release stations at each hose
station. Stations shall be of a type not subject to operation by jarring
or vibration. Stations shall have a dual action release configuration to
prevent accidental system discharge. Break-glass-front stations are not
permitted; however a pull lever break-glass-rod type is acceptable. Station
color shall be red. Station shall provide positive visible indication of
operation. Restoration shall require use of a key or special tool. Place
warning signs at each station indicating that operation of the station will
cause immediate AFFF discharge. Where a building fire alarm pull station
is also mounted in the vicinity of a foam release station, separate the
stations by at least one meter 3 feet horizontally. Provided permanent
engraved rigid plastic or metal labels to clearly distinguish foam release
stations from building fire alarm stations, and to indicate the function of
each foam release station. Stations shall be weatherproof type.
2.7
HEAT DETECTORS
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NOTE: Select the type of heat detector most suited
for application or design. Do not use rate-of-rise
detectors in areas subject to rapid temperature
SECTION 13956N
Page 22
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