If you've got a tank for suction, pipe back to a separate flange on the tank and it needs to be piped to the far side from the vortex plate/suction nozzle. We've had a year of problems with one where we were forced to pipe to suction due to imposition of GREEN requirements- after the tank was erected. The warm (hot?) water caused by the recirculation ended up fooling engine sensors into reporting injector problems when there weren't any. The hassle certainly hasn't been worth the cost of the sep flange and piping to far side, and we'd be thinking of dumping the tank and adding one if we didn't have the alternative solution of retrofitting a PLD to control over pressurization on churn during weekly test runs- not that retrofitting has been an easy path, but that's another story for over a beer at convention.
glc -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, September 15, 2010 1:15 PM To: [email protected] Subject: Re: Fire pump meter loop To test the flow meter ?????? I believe the typical arrangement is for the flow meter discharge is back to the suction thus the full flow test requirement is to check the water supply. I like the flow meter in-line with a test header but this is not done often. John Sent from my BlackBerryR smartphone with Nextel Direct Connect -----Original Message----- From: Mark Sornsin <[email protected]> Sender: [email protected] Date: Wed, 15 Sep 2010 11:55:35 To: [email protected]<[email protected]> Reply-To: [email protected] Subject: RE: Fire pump meter loop You are correct. Although I think officially it is not necessarily a test header, but rather "A fire pump installation shall be arranged to allow the test of the pump at its rated conditions as well as the suction supply at the maximum flow available from the fire pump." (20-5.19.1.1, 2007 ed.). I.e., if you have hose connections on a standpipe - or maybe hydrants connected to the pump - that would allow for proper flow testing, you wouldn't need the test header. Like George just said. The 'actual' flow testing is done periodically to verify that the flow meter is functioning properly. Mark A. Sornsin, PE | Fire Protection Engineer Ulteig Engineers, Inc. |Fargo, ND Direct: 701. 280.8591 | www.ulteig.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jamie.seidl Sent: Wednesday, September 15, 2010 11:39 AM To: Afsa Subject: Fire pump meter loop I seem to recall that if you have a meter loop on a fire pump, you are still required to install a pump test header, and do a discharge test every 5 years, but I can't seem to find it in 20. Is this correct? Jamie Sent from my iPhone _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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 [email protected] http://fireball.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 [email protected] http://fireball.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 [email protected] http://fireball.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)
