Bob, You don't say what the system is protecting but if it were an Aircraft Hangar then NFPA 409:2011 clauses 6.2.8.2.2 and 7.7.4 refer to manual actuation stations inside and outside the hangar area. These will be on the main detection system. There will also be a manual emergency release at the Deluge Control Valves which must not be part of the Detection system so should the detection system fail it is still possible to release the deluge system. Spacing of manual actuation stations should be similar to the Detection system NFPA 72? I have usually worked on 30m maximum travel to actuation stations from any point in the Hangar. This is similar to our national fire alarm standard. If the risk is say an LPG tank then the manual actuation stations should be 30m travel maximum but no closer to the tank than say 10m and never in line with the ends of horizontal cylindrical tanks. Positioning is very much on a job by job basis so they are accessible and safe to reach in an emergency.
Cheers, Russell Gregory Christchurch, New Zealand -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bob Sent: Saturday, 5 April 2014 2:05 p.m. To: [email protected] Subject: Deluge System Pull Station I've been reading for a couple of hours and my eyes are about crossed. Other than at the riser, how do you determine if and when a manual pull station is required for a deluge system. I've read a good bit of literature and code, but I haven't seen anything that clarifies this. Is it based on distance of travel, length of pipe, etc... or is this something that spec would determine? Thank You, Bob Knight, CET III 208-318-3057 www.Firebyknight.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
