Charles Thurston wrote:
Hello bcaputo,
Wednesday, April 4, 2007, 2:03:06 PM, you wrote:
This isn't something your
average inspector will know how to do. You have to find an elderly
ex-Automatic guy.
Or an ex ADT Guy that worked on the Aero Fire Detection Systems
*%^%^*
[EMAIL PROTECTED]
To: sprinklerforum@firesprinkler.org
Sent: Thursday, March 29, 2007 12:35:29 PM
Subject: Re: heat activated devices for a deluge system.
the pilot lines operate from a drop in pressure. There are old
pneumatic HADs that operate off a rise in air pressure. If believe
these HAD's
interpreting the HADs as initiation devices however some
here disagree.
Kevin
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ford,
Charles
Sent: Thursday, March 29, 2007 4:26 PM
To: sprinklerforum@firesprinkler.org
Subject: RE: heat activated devices
Subject: RE: heat activated devices for a deluge system.
Pneumatic rate-of-rise detection has been in use as fire alarm since
long before there was electric
detection. HAD is a spot type of pneumatic rate-of-rise detection
(versus linear type). It was the
primary method of releasing early CO2 systems, I
they are NOT electrical devices, so 72 shouldn't be part of the
equation. The ones I've played with are just domes with small
diameter tubes. Never thought of them as a pneumatic SIGNAL. That
may be leading to some of the confusion. Better to think of it as a
pneumatic HAD that
let me try again. Not saying it ISN'T required.
That double negative thing.
Roland
On Mar 29, 2007, at 11:58 AM, Roland Huggins wrote:
I'm not saying it was required. It just wasn't driven by 25.
Roland
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-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Eric
Shelton
Sent: Thursday, March 29, 2007 3:20 PM
To: sprinklerforum@firesprinkler.org
Subject: RE: heat activated devices for a deluge system.
Since NFPA 72 includes discussion of these types
To: sprinklerforum@firesprinkler.org
Subject: RE: heat activated devices for a deluge system.
I think they need to be a bit more specific in their reference to what
kind of pneumatic HAD's they have. This could be construed as closed
sprinkler heads (pilot heads) on pilot piping.
If they are using
Pneumatic rate-of-rise detection has been in use as fire alarm since long
before there was electric
detection. HAD is a spot type of pneumatic rate-of-rise detection (versus
linear type). It was the
primary method of releasing early CO2 systems, I have seen it in water curtain
applications in
-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Thursday, March 29, 2007 3:44 PM
To: sprinklerforum@firesprinkler.org
Subject: RE: heat activated devices for a deluge system.
I think they need to be a bit more specific in their reference to what
kind
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