Just to be clear this is a Listed product, not a whole lot of debate here. Nowhere does it say UL Listing. The only requirement really where the AHJ comes in is "included in a list published by an organization that is acceptable to the authority having jurisdiction". The only debate might be if LPCB is acceptable to the AHJ. I believe an AHJ (US Fire Marshal or the like) would lose every time if they tried to not accept. You need approval of LPCB, not the application of this product.
That said I agree with those questioning the need for anything but a plain wet head. Whenever faced with this I ask the owner how they were dealing with a power outage or roof leak as examples. With some thinking they always back off and put their money toward protecting their valuable information from ALL causes of loss not just an irrational fear of sprinklers. Chris Cahill, PE* Associate Fire Protection Engineer Burns & McDonnell Phone: 952.656.3652 Fax: 952.229.2923 [email protected] www.burnsmcd.com *Registered in: MN Proud to be #14 on FORTUNE's 2014 List of 100 Best Companies to Work For -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Pat Thompson Sent: Monday, June 15, 2015 11:40 AM To: [email protected] Subject: RE: We have used this set up for up to 3 sprinklers in 'computer rooms'. Approval was given by local AHJ of the idea after some discussion as it is not a listed application. A good idea is to install a small drain (1/2 inch) on the drop nipple to the sprinklers to allow draining after testing or activation; after all the idea is to keep water out of their precious room. Also, a gauge downstream of the solenoid to allow visual indication of the pipe being charged. Both these features are located above the drop tile ceiling. The AHJ asked for a UL listed 24VDC solenoid that is normally open - power holds it closed. By doing so it is 'fail safe', that is to say that in the case of panel failure or power loss the water will reach the sprinklers. A small conventional control panel with smoke or heat detection for automatic activation is all that is needed, the solenoid circuit is on a relay that opens upon fire detection. One drawback is that 24 hours of standby is required in the battery set in order to hold the solenoid. Because of the current draw of the solenoid this results in the batteries being larger than what will fit into the panel enclosure, requiring a separate battery cabinet to house the batteries. Cheers, Pat Thompson ATS Alaska Direct: 907-375-4176 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of teemsprinkdave Sent: Monday, June 15, 2015 7:09 AM To: FORUM Subject: Needing a little help, I have a customer wanting to make a small room into a computer server room. One sprinkler in the room. Has anybody used a solenoid valve, normally closed, and activated by a heat detector? Trying to save the expense of a pre-action system. DAVE GROVER Teem Sprinkler Co. Superintendent NFPA 25 Level II Inspector P 336-650-9005 F 336-650-9007 C 336-399-9006 _______________________________________________ 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
