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
