Neither did the room where 3 electrician died in, I think, Idaho a few years
back.
Chris Cahill, P.E.
Fire Protection Engineer
Sentry Fire Protection, Inc.
763-658-4483
763-658-4921 fax
Email: [EMAIL PROTECTED]
Mail: P.O. Box 69
Waverly, MN 55390
Location: 4439 Hwy 12 SW
Waverly, MN 55390
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Reza Esmaeili
Sent: Thursday, August 23, 2007 9:59 AM
To: [email protected]
Subject: Re: Carbon Dioxide System Discharge Time
Jim,
I forgot to explain, the room doesn't have any operators at all, and
carbon dioxide is the best choice.
Thanks,
Reza
[EMAIL PROTECTED] wrote:
Reza:
I would not recommend a CO2 system as it is potentially too dangerous. I
would consider a clean agent sytem per NFPA 2001.
Hopefully, this is only a back-up to a wet pipe system, which is still my
favorite.
Regards,
James L.(Jim) Roberts, PE, SET
Fluor Corporation
100 Fluor Daniel Drive - C104F
Greenville, SC 29607
864.281.5149
864.281.4916(Fax)
Reza Esmaeili
Sent by: To
[EMAIL PROTECTED] [email protected]
prinkler.org cc
08/23/2007 10:18 AM
Please respond to Subject
sprinklerforum Carbon Dioxide System Discharge Time
Hi all,
For designing a total flooding high pressure carbon dioxide system in a
3,500 cubic feet computer room with electrical equipment and cable runs, I
have specified my room as "Dry electrical hazard" with flooding factor of
0.083 lb/cubic.feet and 50% design concentration according to NFPA-12.
My questions are as below:
1)- Is a computer room fire a deep seated fire?
2)- NFPA 12 states that "For deep-seated fires, the design concentration
shall be achieved within 7 minutes, but the rate shall be not less than
that required to develop a concentration of 30 percent in 2 minutes." Is it
a problem if the total discharge time would be only 1 minute for this case?
Many thanks for your help in advance.
Reza
---------------------------------
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