With your subrogation work do you really believe supervised low air protects against false trips. Sometimes yes sometimes no IMHO. How about the one where the alarm rang for days before the freezer tripped and we got to take the sprinkler system to the parking lot for a couple days. Or sometimes the air compressor runs nearly constantly from a larger leak masking the leak and finally fails only then revealing the leak before anyone has a real chance to react to the low air alarm before it trips.
But I think we digressed. I wouldn't allow the head if involved. Just not worth the risk IMHO. I though agree it would probably work. Good news is they only have to last 10 years. Chris -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David de Vries Sent: Thursday, November 11, 2010 6:21 PM To: [email protected] Subject: RE: High Pressure Dry Pendents Chris, we are designing to avoid the false trip from a dead compressor (supervised low air), but maybe a little hammer from the fire pump starting from a dead jockey pump will trip the DPV. Then you are right; we get the full static pressure. Dave David A. de Vries, P.E., CSP Firetech Engineering Incorporated 2715 Harrison St. Evanston, IL 60201 Tel: 847-733-0944 Fax: 847-866-6255 _______________________________________________ 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)
