CO2 / inert gas extinguishing system

NFPA 15 / NFPA 13 / NFPA 20 / ISO 13702 (fire protection) / company legend practice (NFPA 12 / NFPA 2001)

Drawn as

A bank of cylinders on a manifold with a release valve, piped to discharge nozzles inside an enclosure outline, marked CO2, IG-541 or N2.

Meaning

Total-flooding gas system for turbine hoods, switch rooms and generator enclosures. The release is interlocked with a beacon and sounder and the enclosure dampers. No dedicated component (gas-cylinder-quad is for nitrogen bottles).

Variants

Clean-agent (FM-200, Novec) systems are drawn the same