Let me clarify, I thought it was way too far off in the 1 example I was involved with. 45 sec. calc after it repeatedly failed in the real world at any place between 70 sec and 80 seconds. The contractor used it after the fact when they failed the 60 second test on at least 3 occasions. Tyco did the calc's not the contractor, I checked the input. This was not long after it was released.
I withhold final judgment until I hear more actually experience. My first impression was not good. Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: [email protected] Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ken Holsopple (forum) Sent: Wednesday, June 17, 2009 2:26 PM To: [email protected] Subject: RE: Slow responding dry pipe valves-FDT Mike Brown wrote: >But what happens when then software shows the system tripping in the >required amount of time...then when it comes time for final inspection >with the AHJ and it doesn't work? That could be costly mistake !? Mike, Just went through some FDT training (refresher course) and have been using the program for about three years. Keep in mind that the program carries a UL Listing. It has been tested in comparison with "real world" application and as Chris and others stated it is pretty close. The 2007 edition expanded and clarified on the testing procedures with regards to using the software and testing the system. You may want to take a look. The new edition of 25 also had some changes with regards to freezer facilities and regular testing of dry systems that were designed using the water delivery software. The new acceptance test/inspection procedures provide guidance to what I like to equate to a main drain test. Comparison to the previous years results no matter if they are over 60 seconds or not. It also provides an alternate method using a "manifold" with several outlets depending on the hazard protected. Like any other program.....garbage in means garbage out. You have to mind your p's and q's, but I would not consider it any worse than running hydraulic calculations. Just a couple of more variables like air pressure and trip ratio for the valve, etc. And yes, I can say for sure that any mistake I make carries a price tag. I keep that in mind every time I input data and hit the calculate button. Ken Holsopple Designer Rowe Sprinkler Systems, Inc. _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (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: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
