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Extract fan supplies for Gas suppression agent extract

seansasta
Hello Folks

My client is installing a gas suppression system in a document store; there are 2 extract fans associated with the clearance of the gas suppression agent post activation. We've been asked to design a small control panel to supply & control these fans. There is a menu controlled enable/disable extract fan relay contact within the gas suppression controller that we plan to use to switch the fans on & off manually following a gas activation, I'm planning to put the extract fan control panel adjacent to the gas suppression control panel, outside the room that has the fire suppression in it. The fans and local e-stops would be wired in fire rated cable. 

My question is in relation to the integrity of the power supply to the extract fan control panel; are these extract fans treated the same as smoke clearance fans would be in terms of compliance with BS9999, would the power supply to the extract fans panel need to be fire rated also? I'm thinking not, as the fans are associated with the area within a fire rated room only and the control panel is outside of that zone. Control of associated fire rated dampers etc is already taken care of via the fire alarm system.


Thanks Seansasta
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    I agree with John here. You need sight of the Fire Risk Assessment, and also the Fire Strategy for the room. I would expect to find the extract panel wired in fire resistant cable, I would also expect the extract fans to be manually activated by the Fire & Rescue service, once the fire has been confirmed as out. The Fire Strategy will also account for the type of gas used, although with the exception of carbon dioxide, most are in concentrations that will still sustain life. 


    Regards,


    Alan.
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  • 0
    I agree with John here. You need sight of the Fire Risk Assessment, and also the Fire Strategy for the room. I would expect to find the extract panel wired in fire resistant cable, I would also expect the extract fans to be manually activated by the Fire & Rescue service, once the fire has been confirmed as out. The Fire Strategy will also account for the type of gas used, although with the exception of carbon dioxide, most are in concentrations that will still sustain life. 


    Regards,


    Alan.
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