That's a major concern. I think the specifier saw a typical use and decided
he could cheapen it down.

On Tue, Sep 20, 2016 at 8:14 AM, michael G <m...@keyfps.com> wrote:

> No, they are back at the main return, that is it. just one duct detector,
> that covers about 30 cell pods.   They do not have any detectors in the
> grilles in the cell pods.   that’s our main concern.
>
>
>
> *From:* Sprinklerforum [mailto:sprinklerforum-bounces@lists.firesprinkler.
> org] *On Behalf Of *rongreenman .
> *Sent:* Tuesday, September 20, 2016 11:07 AM
>
> *To:* sprinklerforum@lists.firesprinkler.org
> *Subject:* Re: Pre-action detection
>
>
>
> I am presuming the duct detectors are just inside the return air from the
> cells and the day rooms  and other common areas are high ceilinged with
> normal detectors or where ceilings are low the access is limited.
>
>
>
> On Tue, Sep 20, 2016 at 7:54 AM, <craig.pr...@ch2m.com> wrote:
>
> Where a fire alarm system is installed, duct detectors are an initiating
> device attached to and powered by the FACP system just as any other room
> detector.  It’s essentially a regular detector head with tubes placed in an
> enclosure.
>
>
>
> Here’s a quote to chew on from the book, Operation of Fire Protection
> Systems:
>
> “The detection of duct smoke is made difficult by its dilution with return
> air from other spaces (away from the fire) and possibly with outside fresh
> air.  Also, when the HVAC system fan is not running, smoke may not reach
> the duct detector. For these reasons, air duct smoke detectors must never
> be considered as a substitute for open area protection.”
>
>
>
>
>
>
>
>
>
>
> *Craig L. Prahl*
> Fire Protection Group Lead/SME
> *CH2M*
> 200 Verdae Blvd.
> Greenville, SC  29607
> Direct - 864.920.7540
>
> Fax - 864.920.7129
>
> CH2MHILL Extension  77540
> craig.pr...@ch2m.com
>
>
>
> *From:* Sprinklerforum [mailto:sprinklerforum-bounces@lists.firesprinkler.
> org] *On Behalf Of *Parsley Consulting
> *Sent:* Tuesday, September 20, 2016 10:22 AM
> *To:* sprinklerforum@lists.firesprinkler.org
> *Subject:* Re: Pre-action detection [EXTERNAL]
>
>
>
> Greg,
>     The first issue that came to my mind was that the duct detector is
> frequently provided with power from the HVAC system and not from the FACU
> or releasing panel.  I don't know the logistics of what you're dealing with
> or whether that issue might have some impact however that might be worth
> looking into.  I have to admit I'd never heard of something like this.
> That by itself doesn't mean it's outside the listing or the guidance in -72
> or -13, just that I've never run across this configuration.
>
>
>
>
>
>
> *Ken Wagoner, SETParsley Consulting350 West 9th Avenue, Suite
> 206Escondido, California 92025Phone 760-745-6181 <760-745-6181>Visit our
> website <http://www.parsleyconsulting.com/> *
>
> On 09/20/2016 6:28 AM, Gregg Key wrote:
>
> Greetings,
>
>
>
>                               First of all, what a great convention. Good
> speakers and fellowship. Nashville was awesome as well. I am in serious
> need of some technical assistance. I have posted this a few times with some
> response but this has become a three ring circus between the architect
> ,fire marshal and us . The Architect specified a double interlock
> pre-action system with the detection being provided with a duct detector in
> the return duct at the unit. We have refused to certify the system due the
> fact that the detector not being listed for this application. State is
> asking me to hang a partial certification ( yellow tag) . has anyone else
> dealt with this detection being used for a pre-action system in a detention
> center?   Any help would be appreciated
>
>
>
> Gregg Key
>
> General Manager
>
> Key Fire Protection Enterprises,LLC
>
> 3200 Mike Padgett Hwy
>
> Augusta GA, 30906
>
> O-706-790-3473
>
> C- 706-220-8821
>
> F- 706-738-2119
>
> gr...@keyfps.com
>
>
>
>
>
>
>
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>
>
>
> --
>
> Ron Greenman
>
>
> 4110 Olson Dr., NW
> Gig Harbor, WA 98335
>
> rongreen...@gmail.com
>
> 253.576.9700
>
>
>
> The Universe is monstrously indifferent to the presence of man. -Werner
> Herzog, screenwriter, film director, author, actor and opera
> director (1942-)
>
>
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-- 
Ron Greenman

4110 Olson Dr., NW
Gig Harbor, WA 98335

rongreen...@gmail.com

253.576.9700

The Universe is monstrously indifferent to the presence of man. -Werner
Herzog, screenwriter, film director, author, actor and opera
director (1942-)
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