Dear Mujji,
The relevant standard is NFPA 12 Standard on Carbon Dioxide Extinguishing Systems, that is a comprehensive guide. If you have it fine, otherwise I have the 2008 Edition, let me know I will upload it on 4shared.
However, you may be aware that the instead of CO2, other clean agents (e.g Inergen, etc ) are used for such applications, I suggest you to cary out a comparitive analysis of the various clean agents.
Standards for other gases are also different than NFPA 12.
Regards,
Sajid Ali Khan