sam, it is the temp rise/loss; when it gets to night time the water cools and lowers the temp which lowers the psi/bar same with an overnight hydro test..not much you can do about it that i know.
On Mon, May 3, 2010 at 2:57 PM, sam b <[email protected]> wrote: > Hii everyone > > > My previos mail in this forum was regarding a temporary fire pump(only > dieselPump) only. > we have installed this fire pump for temporary fire fighting in the site. > The pump is 500 USGpm @ 20 Bar.(NOn Listed).The risers we have installed up > to 7 floors now. > The pressure switch setting is kept such that when presuure drops below 16 > Bar the pump automatically starts. > For the last 2 days we are seeing that the pump starts automatically at > night time.In the daytime there is no considerable pressure loss also. > our initial assesment was that it may due to air trapped inside ,as a > result > we installed air release valve in both risers .Also the NRV in the > pumpdiischarge was replaced to ensure there is no leakage. > > Any guesses on whtmay b the reason? > _______________________________________________ > 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]<to%[email protected]> > (Put the word unsubscribe in the subject field) > -- Tom Poisal, CET _______________________________________________ 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)
