This came up at Luke hangar 3 and it was decided to just use fans. I think Luke hangar 4 was air conditioned
ed From: Sprinklerforum [mailto:[email protected]] On Behalf Of Sean.VanGaal Sent: Tuesday, August 7, 2018 10:21 AM To: '[email protected]' <[email protected]> Subject: [EXTERNAL] Maximum temperature in Fire Pump rooms 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
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