Back in LAs Vegas some of the AHJ’s require the riser or pump room to be air conditioned if the alarm panels are installed in those spaces. They were finding at temps above 120F the solder would weaken and separate from the board send false alarms etc.
Thank you, Tom Noble CET, CFPS American Fire Sprinkler Assn. Technical Programs Specialists 214-349-5965 x125 http://www.firesprinkler.org On Aug 7, 2018, 12:21 PM -0500, Sean.VanGaal <svang...@aerofire.com>, wrote: > NFPA 20 lists 120F as the maximum temperature of the room for Diesel Fire > Pumps. I am wondering where this number came from. Was it just a dart throw > or was there testing behind it? > > I ask because the high temperature in Arizona is 122F. NFPA 20 states you > have to properly ventilate the room with no clear guidance beyond this. > Since fan only ventilation is impossible in our extreme situation than some > sort of Air Conditioning would be required to maintain the 120F. > > I have dug around and found pump controllers are rated for 40C (104F) and 50C > (122F). Electric motors carry similar temperature ratings as controllers. > Diesel engines can have air intake as high as 130F per their manufacturer’s > datasheet (not per NFPA 20). So I am wondering if this is one of those > scenarios where the line in the sand was drawn, and then all the > manufacturers had their equipment tested/listed to comply with this line. > Can these components actually operate without failure at higher temperatures > such as 130F or 140F. Obviously you would want to properly de-rate pump > performance accordingly. > > Have any of you dealt with similar issues? Were there any accepted solutions > besides Air Conditioning? > > Thanks, > Sean VG > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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