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Keyes Life Safety

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Duct Detectors

by Brad Keyes, CHSP, on Apr 10, 2019 1:00:32 AM

Q: With regard to testing duct detectors in a hospital, I understand that on an annual basis the automatic shutdown of the AHU's must be verified when duct detectors are activated. I am unclear if there is also an annual requirement to verify damper (pneumatic and/or electric type but excluding fused links) operation at the same time. Also, is there a requirement to test smoke dampers annually?

A: No... there is not. Even though NFPA 72-2010 does require confirmation of all interface relays tested on an annual basis, and does imply that actuation of the dampers are required, NFPA 72-2010 cannot regulate the testing of fire or smoke dampers. Only NFPA 80-2010 and NFPA 105-2010 can regulate testing requirements for fire and smoke dampers respectfully.

You still have to test the interface relays (modules) on an annual basis, but you are not required to confirm that the smoke dampers did close on an annual basis.

But be aware, that some surveyors may require that you do confirm the smoke dampers closed on an annual interface relay test... That would be an incorrect interpretation on their part, and you may want to point out that NFPA 4 was created (in part) to eliminate these conflicting cross-testing requirements.

Topics:Fire AlarmDuct DetectosSmoke Dampers

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