If the warehouse is unheated, that is, if there is a chance of freezing, it is my opinion that it would be doubtfulto find a single interlock preaction system; therefore, it would likely be a double interlock. You could look at the design area on the hydraulic placard ( if there is one) as one way of making the determination. Take a look at the trim, and if you do not see a pneumatic actuator in addition to the solenoid, it is likely that it is an electric-electric type double interlock system. This can be verified by looking at the releasing panel input zones and determining if the low air pressure switch is wired into an alarm zone rather than a low air supervisory zone. Of course, you can verify the manufacturer and compare to the data sheets as well.
Regards, Salvatore J. Izzo III, P.E. SFPE Manager - QA/QC Operations Insurance Services Office Verisk Commercial Real Estate 545 Washington Blvd. Jersey City, NJ 07310 - 1686 t 201.469.2486 f 201.748.1942 c 732.533.7927 [email protected] www.verisk.com/insurance Verisk Insurance Solutions ● ISO | AIR Worldwide | Xactware -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, June 30, 2014 9:13 AM To: [email protected] Subject: RE: Identification of preaction system types Ok, So what would be the tell-tale difference? Craig L. Prahl Fire Protection Group Lead CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29303 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Johnson, Duane (NIH/OD/ORS) [C] Sent: Monday, June 30, 2014 9:12 AM To: '[email protected]' Subject: RE: Identification of preaction system types Nope. You have to look at the trim on the preaction valve. Duane Johnson, PE Program Manager Division of the Fire Marshal (Contractor) Office of Research Services National Institutes of Health 301-496-0487 "Protecting Science - One Sprinkler at a Time" -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Monday, June 30, 2014 9:09 AM To: [email protected] Subject: Identification of preaction system types Can you identify the type of preaction system installed just by looking at the system riser? I have a warehouse, unheated, Preaction system of unknown type. There are heat detectors at the roof deck and there is a small air compressor. That's all I've got to go on. I can make assumptions all day long, but no assumption is better than an incorrect assumption at this point. Craig L. Prahl Fire Protection Group Lead CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29303 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] _______________________________________________ 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org ________________________________ This email is intended solely for the recipient. It may contain privileged, proprietary or confidential information or material. If you are not the intended recipient, please delete this email and any attachments and notify the sender of the error. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
