That makes sense. Weve had a few AHJs that have made us flow one of these in conjunction with the overhead system. There is just no criteria by the manufacturer on how it is supposed to go. That is where the challenge comes.
<http://www.mfpdesign.com/> Travis Mack, CFPS, CWBSP, RME-G, SET MFP Design, LLC 3356 E Vallejo Ct Gilbert, AZ 85298 480-505-9271 fax: 866-430-6107 <mailto:tm...@mfpdesign.com> tm...@mfpdesign.com www.mfpdesign.com Send large files to us via: <https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.highta il.com%2Fu%2FMFPDesign&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C 14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=eGdMZGu2 wXhUupGwgGTrqF3b54OP5%2BAZvlHhABSexWY%3D&reserved=0> https://www.hightail.com/u/MFPDesign LinkedIn: <https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linked in.com%2Fin%2Ftravismack&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77% 7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=tT5E7L sZjSmyreKi4gDCa70EWN%2BZodi%2FhbeCbHNRijI%3D&reserved=0> https://www.linkedin.com/in/travismack The bitterness of poor quality remains long after the sweetness of low price is forgotten. From: Kyle.Montgomery <kmontgom...@aerofire.com> Sent: Wednesday, August 14, 2019 3:27 PM To: firstname.lastname@example.org Cc: Travis Mack, SET, CFPS, CWBSP, RME-G <tm...@mfpdesign.com> Subject: RE: [EXTERNAL] Captive Aire Systems Ive always been under the impression that these are treated separately from the overhead sprinkler system, i.e. either the fire is in the hood and controlled by the hood system, or it is outside of the hood and controlled by the sprinkler system. Ive never considered them as working in conjunction with each other. The only time Ive ever really done anything other than provide an outlet to connect to was when some of the systems had a maximum working pressure that was lower than the system operating pressure, so we had to provide a pressure-reducing valve on the feed and guarantee that the system could provide flows/pressures within a certain range. Im definitely not an expert though. -Kyle M From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Travis Mack, SET, CFPS, CWBSP, RME-G via Sprinklerforum Sent: Wednesday, August 14, 2019 3:20 PM To: email@example.com <mailto:firstname.lastname@example.org> Cc: Travis Mack, SET, CFPS, CWBSP, RME-G <tm...@mfpdesign.com <mailto:tm...@mfpdesign.com> > Subject: [EXTERNAL] Captive Aire Systems Im sure some of you have dealt with these Captive Aire / Piranha systems. Basically they are hood systems that connect to the sprinkler system. The one I have a data sheet for has an operating pressure of 32-70 psi and flows vary depending on # of nozzles. How do those of you dealing with these handle them? The supplier will not do any calculations for the system. My question is, do we treat these like a rack system and balance the hood systems to the overhead? If I have a kitchen with 3 of these, do I figure 0, 1, 2 or 3 flowing simultaneously with the overhead. As you can imagine, a standard sprinkler in the kitchen is ±10 psi. Now, if we have to treat this like a rack system and balance at the junction point, this 30 psi for the Piranha system will significantly over-discharge the sprinklers leading to a much larger kitchen demand. These often seem to be brought up toward the end of the project leaving everyone scrambling. What has the collective group been doing with these things? <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.mfpdesign.com_&d=Dw MFAw&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A& m=55nTB_SIg__k7Xnu85uW2LcHH_p321dxRfEw3_AchjM&s=2AEk_CaWT5zGUOwFtrdm1vOavnvL eo3liS6IicLZu98&e=> Travis Mack, CFPS, CWBSP, RME-G, SET MFP Design, LLC 3356 E Vallejo Ct Gilbert, AZ 85298 480-505-9271 fax: 866-430-6107 <mailto:tm...@mfpdesign.com> tm...@mfpdesign.com www.mfpdesign.com <http://www.mfpdesign.com> Send large files to us via: https://www.hightail.com/u/MFPDesign LinkedIn: https://www.linkedin.com/in/travismack The bitterness of poor quality remains long after the sweetness of low price is forgotten.
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