There was a change in the 13 ROP that addresses this issue. It points out that even when water delivery is calculated, the acceptance test still requires a timed delivery for future ITM. It states that if a single outlet takes longer than 70 sec then it must be evaluated. To be honest, there is now a need to better coordinate with the option of manually testing using more than one sprinkler.
Roland On Jun 17, 2009, at 11:36 AM, Travis Mack wrote: > I did a couple of preaction systems about 3 years ago. The FDT and > field > tests were within 1-2 secs if I recall correctly. I was pretty > impressed. > We did have a fire pump and tank on the project, so there would not > have > been any variability from a city supply. > > The systems were large (+/-1200 gallon capacity) and that is why we > did > the FDT to make sure it worked before installation. > > We did have the Tyco DV-5 preaction valve and the QRS accelerator on > the > system. The FDT would not work with our looped system. We had to > make it > a tree for the FDT to work. Tyco says it works on simple loops, > which is > what we had, but it would not work. We sent the file to tech support. > Their response was: Well, I guess it won't work on a loop like that > either. So, a minor bump in pipe size and all went well. > > FYI - The fire pump on the system was a 150 psi @ 1500 gpm diesel > pump. > > > Travis Mack _______________________________________________ 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)
