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Smoke Detector Function in Preaction Systems

Question asked by binderfan on Mar 1, 2018
Latest reply on Mar 6, 2018 by binderfan

In a single or double interlock pre-action system, if the occupancy does not require smoke detectors as long as there is a fully automatic sprinkler system installed, do the pre-action trigger function smoke detectors have to be hooked up as alarm/life safety devices, or is a supervisory signal acceptable. I am unable to find a specific reference to this in the 2013 NFPA 72 standard. Installing and programming the devices to operate the valves, monitor the air pressure, and detect waterflow and tamper are well covered, but whether the general alarm is required by code for these detectors is not addressed anywhere I can find.

The job specification says "annunciated at the fire alarm panel only and will not activate the evacuation signal," which I would assume would be covered by a supervisory indication. In all the systems I have installed in the past, full alarm was required for those devices, and I had never questioned whether this was a code or a spec requirement.

 

Thanks!

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