Maybe so but UL is not recognized or an adopted Code Set by any government entity so while it's wording may be logical and appropriate it's not necessarily enforceable.
But in this case I would still cite it and use it to inform Mr. PE that he's totally clueless as to what he has designed and specified. First a D.I.P.A. for a few computers is gross overkill. Second with supervised piping, area smoke detection and closed sprinkler heads, if someone doesn't respond to the first alarm or second then it needs to go off. There is absolutely no good reason to have an abort switch in a P.A. system. But you would be surprised on how many times I've been asked this very question. Once I've explained the sequence of operation of a P.A. system the question will go away. This sounds like one of those projects that would be a real nightmare since you're obviously dealing with an EOR who already has his mind made up on what is proper and required and probably won't back down and look foolish to the owner. If you decide to pass I'd write a nice letter to the owner and explain why you did not bid on this project. If you do bid and win, I'd write another letter explaining the proper operation and purpose of a D.I.P.A. system and copy the engineer. Obviously the owner and EOR need some additional educating. Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 craig.pr...@ch2m.com http://www.ch2m.com -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Forest Wilson Sent: Monday, April 06, 2009 11:50 PM To: sprinklerforum@firesprinkler.org Subject: Re: Pre-action abort But UL is the entity doing the listing. Forest Wilson -----Original Message----- From: Jay Jay Blocker <fire_sprinkler...@yahoo.com> Date: Mon, 6 Apr 2009 20:36:49 To: <sprinklerforum@firesprinkler.org> Subject: Re: Pre-action abort But where does the UL rank in order? By this I mean if the local area has adopted 13 and 25 do they also have to take into account ULs rules or just say as long as the device is listed it is good? ________________________________ From: Mike Henke <mi...@pottersignal.com> To: sprinklerforum@firesprinkler.org Sent: Monday, April 6, 2009 4:45:14 PM Subject: RE: Pre-action abort It is prohibited by UL. UL 864 states: Abort switches shall not be used on systems intended to perform pre-action or deluge functions. Regards, mike Mike Henke CET Sprinkler Product Manager Potter Electric Signal Co. LLC WWW.POTTERSIGNAL.COM 866-572-3005 -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of craig.pr...@ch2m.com Sent: Monday, April 06, 2009 4:29 PM To: sprinklerforum@firesprinkler.org Subject: RE: Pre-action abort Question one: Why? Question two: At what stage of system response do you want to abort? There is no mention anywhere in NFPA 13 about the allowance or disallowance of an abort switch. I just can't see where anyone would be quick enough to get to it if something in the system started an operation anyway. With all the delays already built in to a double interlock system what in the world could another interruption accomplish? I would not be in favor of it. But for the sake of curiosity, what's the application and reasoning behind the question? Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 craig.pr...@ch2m.com http://www.ch2m.com -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Chris Cahill Sent: Monday, April 06, 2009 5:15 PM To: sprinklerforum@firesprinkler.org Subject: Pre-action abort Can one have an abort button on a double interlock pre-action (electric/pneumatic)? I'm assuming it would be like on a clean agent system. PE hasn't got back to us (don't really expect him to, not a surprise). Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: chr...@sentryfiremn.com Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field)
