Laserfiche WebLink
M <br />A <br />S <br />T <br />E <br />R <br /> <br />D <br />R <br />A <br />W <br />I <br />N <br />G <br />CENTRAL CA <br />8 Adrian Court, Burlingame, CA, 94010 PHONE: (415) 956-2200 FAX: (919) 227-5940 EMAIL: reg91@captiveaire.com <br />Double Wall Grease Duct SpecificationFurnish double wall, factory built grease duct for use with Type I kitchen hoods, which conforms to the requirements of <br /> <br />N <br />F <br />P <br />A <br />- <br />9 <br />6 <br />. <br /> <br />P <br />r <br />o <br />d <br />u <br />c <br />t <br />s <br /> <br />s <br />h <br />a <br />l <br />l <br /> <br />b <br />e <br /> <br />E <br />T <br />L <br />listed to UL-1978 and UL-2221 for venting air and grease vapors from commercial cooking operation. Models DW-2R, <br />3 <br />R <br /> <br />a <br />n <br />d <br /> <br />3 <br />Z <br /> <br />a <br />r <br />e <br /> <br />u <br />s <br />e <br />d <br /> <br />f <br />o <br />r <br /> <br />g <br />r <br />e <br />a <br />s <br />e <br />duct applications when installed in accordance with these instructions and National Fire Protection Association "NFPA <br /> <br />9 <br />6 <br />" <br />; <br /> <br />S <br />t <br />a <br />n <br />d <br />a <br />r <br />d <br /> <br />f <br />o <br />r <br /> <br />V <br />e <br />n <br />t <br />i <br />l <br />a <br />t <br />i <br />o <br />n <br />Control and Fire Protection of Commercial Cooking Operations. Double wall grease ducts are listed for a continuous i <br />n <br />t <br />e <br />r <br />n <br />a <br />l <br /> <br />t <br />e <br />m <br />p <br />e <br />r <br />a <br />t <br />u <br />r <br />e <br /> <br />o <br />f <br /> <br />5 <br />0 <br />0 <br /> <br />d <br />e <br />g <br />r <br />e <br />e <br />s <br />F and intermittent temperatures of 2000 degrees F.The duct sections shall be constructed of an inner duct wall and an outer wall with insulation in between. The inner du <br />c <br />t <br /> <br />w <br />a <br />l <br />l <br /> <br />s <br />h <br />a <br />l <br />l <br /> <br />b <br />e <br /> <br />c <br />o <br />n <br />s <br />t <br />r <br />u <br />c <br />t <br />e <br />d <br /> <br />o <br />f <br /> <br />. <br />0 <br />3 <br />6 <br />inch thick, 430 type stainless steel and be available in diameters 8" through 24". The outer wall shall be constructed of <br /> <br />s <br />t <br />a <br />i <br />n <br />l <br />e <br />s <br />s <br /> <br />s <br />t <br />e <br />e <br />l <br /> <br />a <br />t <br /> <br />a <br /> <br />m <br />i <br />n <br />i <br />m <br />u <br />m <br /> <br />o <br />f <br />.024 inch thickness. The duct, based on model number, shall include layers of Super Wool 607 Plus insulation betwee <br />n <br /> <br />t <br />h <br />e <br /> <br />i <br />n <br />n <br />e <br />r <br /> <br />a <br />n <br />d <br /> <br />o <br />u <br />t <br />e <br />r <br /> <br />w <br />a <br />l <br />l <br />. <br /> <br />G <br />r <br />e <br />a <br />s <br />e <br />duct joints shall be held together by means of formed V clamps and sealed with 3M Fire Barrier 2000+. The duct wall <br />a <br />s <br />s <br />e <br />m <br />b <br />l <br />y <br /> <br />s <br />h <br />a <br />l <br />l <br /> <br />b <br />e <br /> <br />t <br />e <br />s <br />t <br />e <br />d <br /> <br />a <br />n <br />d <br /> <br />l <br />i <br />s <br />t <br />e <br />d <br />DWôRU]HURLQFKFOHDUDQFHDFFRUGLQJWRFODVVLILFDWLRQVClassifications and ClearancesUL 2221: Standard for Fire Resistive Grease Duct Enclosure Assemblies. Chapter 7 of this standard references a test <br />l <br />a <br />b <br />e <br />l <br />e <br />d <br /> <br />I <br />n <br />t <br />e <br />r <br />n <br />a <br />l <br /> <br />F <br />i <br />r <br />e <br /> <br />T <br />e <br />s <br />t <br />. <br /> <br />S <br />e <br />c <br />t <br />i <br />o <br />n <br />7.1.1 references two installation conditions, Condition A and Condition B. Condition A represents all installation conditi <br />o <br />n <br /> <br />e <br />x <br />c <br />e <br />p <br />t <br /> <br />f <br />o <br />r <br /> <br />i <br />n <br />s <br />t <br />a <br />l <br />l <br />a <br />t <br />i <br />o <br />n <br /> <br />w <br />i <br />t <br />h <br />i <br />n <br />non-ventilated combustible enclosures. Condition B represents installation within a non-ventilated combustible enclos <br />u <br />r <br />e <br />. <br />Model DW-3Z is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies) as an alternate to 2-Hr. fi <br />r <br />e <br /> <br />r <br />e <br />s <br />i <br />s <br />t <br />i <br />v <br />e <br /> <br />s <br />h <br />a <br />f <br />t <br /> <br />e <br />n <br />c <br />l <br />o <br />s <br />u <br />r <br />e <br />s <br /> <br />w <br />i <br />t <br />h <br /> <br />a <br />minimum zero clearance to combustibles (sizes 8" to 24" diameter). Model 3Z is listed in accordance with the require <br />m <br />e <br />n <br />t <br />s <br /> <br />f <br />o <br />r <br /> <br />d <br />u <br />c <br />t <br /> <br />e <br />n <br />c <br />l <br />o <br />s <br />u <br />r <br />e <br /> <br />C <br />o <br />n <br />d <br />i <br />t <br />i <br />o <br />n <br />A and B.Model DW-3R is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies) as an alternate to 2-Hr. f <br />i <br />r <br />e <br /> <br />r <br />e <br />s <br />i <br />s <br />t <br />i <br />v <br />e <br /> <br />s <br />h <br />a <br />f <br />t <br /> <br />e <br />n <br />c <br />l <br />o <br />s <br />u <br />r <br />e <br />s <br /> <br />w <br />i <br />t <br />h <br /> <br />a <br />reduced clearance to combustibles (sizes 8" to 24" diameter). Model 3R is listed in accordance with the requirements f <br />o <br />r <br /> <br />d <br />u <br />c <br />t <br /> <br />e <br />n <br />c <br />l <br />o <br />s <br />u <br />r <br />e <br /> <br />C <br />o <br />n <br />d <br />i <br />t <br />i <br />o <br />n <br /> <br />B <br />. <br />Model DW-2R is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies) as an alternate to 2-Hr. f <br />i <br />r <br />e <br /> <br />r <br />e <br />s <br />i <br />s <br />t <br />i <br />v <br />e <br /> <br />s <br />h <br />a <br />f <br />t <br /> <br />e <br />n <br />c <br />l <br />o <br />s <br />u <br />r <br />e <br />s <br /> <br />w <br />i <br />t <br />h <br /> <br />a <br />reduced clearance to combustibles (sizes 8" to 16" diameter). Model 2R is listed in accordance with the requirements f <br />o <br />r <br /> <br />d <br />u <br />c <br />t <br /> <br />e <br />n <br />c <br />l <br />o <br />s <br />u <br />r <br />e <br /> <br />C <br />o <br />n <br />d <br />i <br />t <br />i <br />o <br />n <br /> <br />B <br />.