Zoning for Fire Suppression during the A/C is operated in adjacent room

[nattapong.s]

Hi Everyone,
I am HVAC engineer and work at tropical zone (hot and Humid) and now dealing with the fire philosophy inside substation building.

Substation is separated into 3 rooms let say A, B, C.
A = Manned Area (Control Room)
B,C = Unmanned Area (Panel Room)

Each room is provided their own individual A/C. All these rooms connected by Duct-Centralized A/C is designed each room with Fire Motorized Damper to serve the fresh air for improving indoor air quality and pressurized the substation.

It's about Zoning. Once FIRE at Room C , the Duct-Centralized will be shut down along with the Motorized Fire Damper, the individual A/C for room C also shutdown. CO2 gas suppression to be in service but the other rooms still conditioned with their own A/C.

The question is " Is it any code applicable that allow Room A and B operating once the adjacent room is FIRE?" this is by my client request.
I feel a little bit not make any senses to me as my proposal was to shutdown all A/Cs along with the damper themselves. I spent a time acquiring in NFPA but unfortunately found nothing which request your special profession in advice, Sir.

Thanks in advance.

 

[LCREP]

CO 2 gas in a manned space not good at all. Also you are depending on a damper to close to contain the gas to extinguish the fire not good practice in my view. Have you reached out the insurance carrier engineering department for input they may help you convince the client what they propose is not a good idea.

 

[nattapong.s]

LCREP,

Thanks for your suggestion. I will try to reach them.

How about Adjacent Unmanned is it acceptable?

 

[LCREP]

Unmanned space sure with the proper notification before the system dumps and abort buttons in place as per NFPA just in case the space is occupied during maintenance.