Abort switches in CO2 systems

[ZDR1985]

Hi guys,

NFPA 12 4.5.4.11 Abort switches shall not be used on carbon dioxide systems.

Can someone explain to me why?

 

[stookeyfpe]

Most likely because two distinct alarm signals will be initiated before the CO2 system discharges:

1) Activation of the occupant notification devices upon operation of the initiating device
2) A separate and distinct pre-discharge alarm before CO2 is released

 

[AustinFP]

I would say it's likely because CO2 is deadly, and you don't want someone going into or staying in an area where a CO2 system has activated to hold the abort station.