26 September 2006
Fixed dry chemical extinguishing systems are appropriate for the protection of
certain types of special occupancies, hazards, and facilities such as dip tanks,
and other operations involving flammable liquids.
Dry chemical extinguishing systems must conform to NFPA 17, Dry Chemical
Dry chemical agents should not be used to protect sensitive electronics. Dry
chemical extinguishing systems are no longer UL listed or FM approved for the
protection of cooking equipment.
CARBON DIOXIDE SYSTEMS.
Carbon dioxide (CO2) systems are normally effective against flammable liquid
(Class B) and electrical (Class C) fires. New total flooding systems are not
authorized in normally occupied areas.
Carbon dioxide systems must conform to NFPA 12, Carbon Dioxide
Do not locate CO2 piping in any area where a pipe break or leak
could make a normally occupied area untenable.
Provide a stand-alone (not dependent upon the building fire alarm
system for operation) control panel that is listed for releasing device service. The
building fire alarm control panel or fire alarm reporting system must monitor this
Careful consideration must be given to compartment under/over-
NFPA 12 and the manufacturer's recommended procedures relative to enclosure
Provide a manually activated exhaust system to facilitate the
extraction of any remaining CO2 after the required hold time of the total flooding
CO2 system. The exhaust system can be integrated into the HVAC system for