Consider the FF's if you do one. Try to set the retard the shortest so it's not on the panel when the FF's arrive. If they see the zone actually causing the alarm it will get the water mitigation started faster.
Chris -----Original Message----- From: David de Vries <[email protected]> Sender: [email protected] Date: Thu, 9 Dec 2010 17:06:27 To: <[email protected]> Reply-To: [email protected] Subject: Re: "main" flow switch Ed: Unless a high-rise, 13 only requires a single flow switch for an entire building. I am not aware of a "main" flow switch as a code requirement, but as an engineer I have often spec'd one, typically in the pump room downstream of the pump, where there are multiple systems, or floors, supplied through a feed main. Flow switches have been known to fail and having redundancy provides a level of comfort, especially if there is a long run of feed main. I do know that the pump controller is wired for supervision, but if the building is monitored by an alarm service, that signal comes in as a supervisory, not an alarm that rolls the trucks. Dave David A. de Vries, P.E., CSP Firetech Engineering Incorporated --- On Thu, 12/9/10, Ed Kramer <[email protected]> wrote: From: Ed Kramer <[email protected]> Subject: "main" flow switch To: [email protected] Date: Thursday, December 9, 2010, 4:52 PM Apologies if this has been discussed previously. Is anyone aware of a code requirement for a "main" flow switch? This would only occur in a building with multiple systems (such as 1 wet and 1 dry, or 3 wet, etc). The "main" flow switch would be located upstream of the individual system risers and would be in addition to the flow switches/pressure switches on the wet/dry systems. I've seen a number of projects where they are called for, but am curious if it's a code requirement or not. Ed Kramer Littleton, CO _______________________________________________ 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)
