I'm currently looking at a water treatment plant.
Electrical design wanted to coordinate using the same horn/strobes to notify for a chlorine gas leak, as it would avoid being redundant and putting up their own horn/strobes to go off during a leak.
This would require hooking up a non-fire related notification appliance to the fire alarm panel.
What are thoughts on this?
Thanks in advance.
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4/18/2023 08:11:17 am
IMO, since you want to evacuate the building, in the case of a hazardous material release, it should be acceptable to use the fire alarm notification devices.
4/18/2023 08:37:36 am
You can achieve different things depending on the system used. If budget is not a worry, use a voice evacuation system and program a message that it’s a chlorine gas leak. Provides urgency but also lets people know it’s not a fire. If just using an addressable panel with horns/strobes and with an AIM on the gas detector, you can program the point reporting to the fire department/central station that it’s a chlorine gas detector. That way the FD is not rolling up expecting a fire but know that it is a gas leak and will have their Hazmat plan ready to go (or at least they should if they have a plant working with chlorine gas in their jurisdiction)
4/18/2023 08:51:28 am
It cant be a voice system, it would have be Mass Notification. Voice is only programed to say fire.
4/18/2023 09:06:17 am
@SMALL CHANGE, provided it still rings temporal 3 and doesn’t override a fire event it is still classified as voice evacuation. MNS comes into play when you prioritize non-fire alarm events over fire alarm events. See NFPA 72 24.4.1 “fire alarm or other emergency”
4/18/2023 09:19:53 am
With that being said, there is a section in NFPA 72 (220.127.116.11) that says [signals shall be distinctive so that a fire signal can be distinguished from "signals that require different actions" by the occupant.]
Todd E Wyatt
4/18/2023 08:38:01 am
Todd E Wyatt
4/18/2023 09:21:35 am
Additional Standard references requiring audible alarms are to be "distinctively and descriptively annunciated".
4/18/2023 08:43:36 am
I’m not in front of a code book but the AHJ can allow the FA to Evac for that as long as you treat it like any other fire alarm condition in that zone/area.
I have programmed a fire alarm system that was specifically accepted by the local fire marshal, state fire marshal, CMS (Centers for Medicare and Medicaid Services), and Joint Commission for a large downtown hospital that had over 200 separate discrete voice Code Red and Fire Alarm messages.
4/18/2023 08:46:51 am
I like it. I think it's a good idea to cut down on wasted material and labor (provided as Glenn states, some notification can be made on the FACP to emergency responders as to make sure they know what type of emergency they're responding to.
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