Fire shutdown module for ventilation and ACU

I was wondering if a fire alarm shutdown module for the air conditioning unit is required

I know this kind of interface is mandatory for ventilation systems that bring in fresh air from outside in order to prevent the fire from spreading  in the event of a fire .

ChatGPT is providing conflicting information: sometimes it says the module is not required, and at other times it says the module is needed to reduce air movement and circulation and avoid the fire spreading.

What is your opinion on this, guys?

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  • I'm inclined to think that this is one of the cases where the stop the airflow approach is correct,

    Perhaps, but what if the container contains batteries that can emit combustible or explosive gases or vapours? Are the containers constructed to deal with this? Is separate ventilation provided for those?

    Also, certain switchgear and suppression systems contain gases that might be harnful ... what about evac of persons?

    Without the risk assessment, it's not really possible to speculate IMO.

  • Hi Graham, I agree  more info needed, and  I'm not sure of the role of the OP - there has been no mention of a design authority / system architect so perhaps there isn't one - in which case the fire plan may well not exist yet  too.  That's why I'm inclined, not suggesting and certainly not recommending...  

    But there should be one of each, as part of the system design, let alone the containment design. without that it could just be very dangerous.


    By way of illustration some big switchgear is intended to be fitted in a building where the roof is allowed to blow off for example, in preference to the sides being pushed outwards. Others have deliberate weak points that flap outwards in the event of an explosion within. Now it may not be that the fault levels are actually that big, but we dont really know, and the outer containment needs to reflect the needs of what it contains. 

    Mike.

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  • Hi Graham, I agree  more info needed, and  I'm not sure of the role of the OP - there has been no mention of a design authority / system architect so perhaps there isn't one - in which case the fire plan may well not exist yet  too.  That's why I'm inclined, not suggesting and certainly not recommending...  

    But there should be one of each, as part of the system design, let alone the containment design. without that it could just be very dangerous.


    By way of illustration some big switchgear is intended to be fitted in a building where the roof is allowed to blow off for example, in preference to the sides being pushed outwards. Others have deliberate weak points that flap outwards in the event of an explosion within. Now it may not be that the fault levels are actually that big, but we dont really know, and the outer containment needs to reflect the needs of what it contains. 

    Mike.

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