First, why would you add air when the N2 alone is the cat's meow to minimize corrosion? Next, with an AMD it's an auto air supply until its empty. If they keep a spare bottle and there's a low air whistle, and you haven't installed a leaker, then they can change it when they come in for work the next day. That is like a dream dry sys air supply, you could even connect the reserve so if the one guy who knows how to do it is on vacation, they don't freeze the system. Someone could keep an eye on it, too- like if they have quarterlies... So you can tailor a setup that makes sense and is reliable and adds longevity. You can't account for every situation so I'm not going to try to address the code side.
We used bottles to avoid an air compressor in explosion-proof rated areas. Back when the WMAG was the only alarm days. George L. Church, Jr., CET Rowe Sprinkler Systems, Inc. PO Box 407, Middleburg, PA 17842 877-324-ROWE 570-837-6335 fax g...@rowesprinkler.com -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Matthew J. Willis Sent: Thursday, October 04, 2012 4:46 PM To: sprinklerforum@firesprinkler.org Subject: RE: Air Supply Guess I am confused now. 5.1 is Labeled "Automatic". Do sections 7.2.6.2.1 & 2 apply? (07) 7.2.6.7 "Nitrogen" references you back to 5.1 "Automatic..." R/ Matt -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Cahill, Christopher Sent: Thursday, October 04, 2012 3:54 PM To: sprinklerforum@firesprinkler.org Subject: Air Supply Looking over a job where the EOR wants to use cylinders to supply the air for a dry system. There is plenty of power to the building so that's not the issue. They are showing lab air cylinders from both air (NC) and nitrogen (NO) into an AMD into the system. I get automatic air is not required. But I'm seeing NFPA 13 '12-7.2.6.5.1 limiting air supply when AUTOMATIC to dependable shop system or a compressor. I don't see bottles being allowed. Or that is to say I don't see bottles as being a dependable shop system. I assume some of you have done bottles for the air to a dry system? As I read you can have them if someone manually opens a valve and refills the system when needed? Of course this is even confusing. Is there something on a manual fill system that requires daily checking? Or are they relying on the low pressure alarm to note when time to refill? Actually, the low pressure alarm isn't even required, right, so are they waiting for a system trip to know when to add air? If manual is allowed isn't an AMD off a bottle a little better but not quite the full blown compressor? Why would they restrict the middle on the order of worst to best? Who wants to straighten me out 'cuz none of us here have ever seen bottles used on a system? Chris Cahill, PE* Senior Fire Protection Engineer, Aviation & Facilities Group Burns & McDonnell 8201 Norman Center Drive Bloomington, MN 55437 Phone: 952.656.3652 Fax: 952.229.2923 ccah...@burnsmcd.com<mailto:ccah...@burnsmcd.com> www.burnsmcd.com<http://www.burnsmcd.com/> Proud to be one of FORTUNE's 100 Best Companies to Work For *Registered in: MN -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachment s/20121004/0e12d424/attachment.html> _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
