To Sprinklerforum, NFPA 72 [2013] section 10.3.5. Equipment shall be designed so that is capable of performing its intended functions under the following conditions: [1] At 85 % and T 110% of the nameplate [main] and secondary [standby] input voltages[s]. [2] At ambient temperatures of 32 F and 120 F. [3] Aat a relative humidity of 85% and an ambient temperature of 86 F.
>From a manufacturer of fire alarm panels: the system meets NFPA requirements >for operation at 32F to 120F and a relative humidity 93% +- 2% RH [non >condensing] at 90F +- 3F. However , the useful life of the system's standby >batteries and the electronics components may be adversely affected by extreme >temperatures ranges and its pe be installed in an environment with normal >room temperature of 60 to 80F. This is in South Florida. Some contractors install air conditioning units. There are fire alarm panels with air conditioning. Fire alarm controllers: I am worried about the 120 F. Foam tanks outside: one manufacturer indicates maximum 120F;other indicates 95F. containers should be stored in acool ,dry ,well ventilated location and under cover.do not store containers in direct sunlight. The common thread is the maximum temperature. thank you. Mario Berrios, P.E. [email protected] -----Original Message----- From: Tom Noble <[email protected]> To: sprinklerforum <[email protected]> Sent: Tue, Aug 7, 2018 1:46 pm Subject: Re: Maximum temperature in Fire Pump rooms 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 <[email protected]>, 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 [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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