From N.F.P.A. Pamphlet 12, National Fire Alarm Code, 2005 Edition:

1.3.4 Existing systems shall be upgraded to meet the requirements for safety signs in 4.3.2, lock-out valves in 4.3.3.6 and 4.3.3.6.1, and pneumatic time delays and pneumatic predischarge alarms in 4.5.6.1.

1.3.5 These upgrades shall be completed by August 7, 2006.

4.1.2 New Installations Total flooding carbon dioxide systems shall be permitted to be installed in normally occupied enclosures where there are no suitable fire-extinguishing agents that can be used to provide an equivalent level of fire protection to that of carbon dioxide.

4.3.3.6* A lock-out shall be provided on all systems except where dimensional constraints prevent personnel from entering protected space.

4.5.6* Predischarge Alarms. A pneumatic predischarge alarm and pneumatic time delay shall be provided for the following:
(1) All total flooding systems protecting normally occupied and occupiable enclosures.
(2) Local application systems protecting normally occupied and occupiable enclosures where the      discharge will expose personnel to hazardous concentrations of carbon dioxide (See 4.5.4.5.3).

<< Back