In New Zealand most of our Fire Sprinkler Systems have this arrangement of a manually controlled super-pressure pump which is used to raise the installation pressure above the sprinkler alarm valve by approx 450 kPa. This allows us to have two pressure sensor settings at approx 150 kPa intervals for signalling defect and fire. If the water supply pressure is say 500kPa then the installation standing pressure would be 950kPa. Defect would be signalled at 800 kPa and Fire at 650 kPa. Most of our systems are connected to a national receiving centre. Defect calls are on sent to maintenance company and fire calls go direct to the Fire Service. This is specified in our New Zealand Standard NZS 4541. We still have a water motor alarm gong on the building.
Russell Gregory Special Projects Engineer Wormald Christchurch, NZ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Matt Grise Sent: Saturday, 1 February 2014 5:57 a.m. To: [email protected] Subject: jockey pump only I ran across a system where the owner has elected to use a small pump to pressurize the system in order to prevent municipal water surges from causing false trips on the flow switch. Has anyone seen this before? Are there any codes that address something like this? (not something that we installed, or specified... just found it this way) Matt Grisé PE*, LEED AP, NICET II Sales Engineer Alliance Fire Protection 130 w 9th Ave. North Kansas City, MO 64116 *Licensed in KS & MO 913.888.0647 ph 913.888.0618 f 913.927.0222 cell www. AFPsprink.com _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
