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6. Installation Techniques 3MTm Fire Barrier Duct Wrap 615+ should be installed per the application design listing in accordance with the following basic installation instructions. A. Material and Equipment C. Preparatory Work 93 MTm Fire Barrier Duct Wrap 615+ blanket, 1-1/2 in. 3MTM Fire Barrier Duct Wrap 615+ is installed with (38 mm)thick 2, 24 in. (60 cm) or 48 in. (121 cm) common tools, such as knives, banders and capacitor wide, 25 ft. (635 cm) standard length. The 48 in. discharge guns for applying insulation pins. In order to (121 cm)wide blanket helps to minimize waste. install the duct firestop system,the surfaces of all the • Aluminum foil tape. openings and penetrating items need to be clean, dry, frost free and free of dust. • Minimum 3/4 in. (19 mm)wide filament tape. • Stainless steel banding material, minimum 1/2 in. D. Method (Two-Layer for ASTM E 2336) (12,7 mm) wide, minimum 0.015 in. (0,38 mm)thick, Note:These general instructions for installing with stainless steel banding clips. 3MTM Fire Barrier Duct Wrap 615+ include a two-layer • Hand banding tensioner, crimping tool and wrap construction of 24-inch 3MTm Fire Barrier Duct banding cutter. Wrap 615+ blanket applied directly to a grease duct. • Minimum 12 gauge copper-coated steel insulation To minimize waste, 3MTm Fire Barrier Duct Wrap 615+ pins used with minimum 2-1/2 in. (38 mm) square material should be rolled out tautly before measuring. galvanized steel or stainless speed clips or 1-1/2 in. The first layer of 3MTm Fire Barrier Duct Wrap 615+ (38 mm) dia. round or equivalent sized insulated blanket is wrapped around the perimeter of the duct cup-head pins. and is cut to a length to overlap itself not less than 3 in. (76 mm). The overlap made by adjacent blankets • Capacitor discharge stud gun. forms the "longitudinal" overlap. Aluminum foil tape is •Access door hardware: four galvanized steel thread used to seal all cut edges of the blanket and any tears rods, 1/4 in. (6 mm) diameter by minimum 6 in. long in the foil scrim. This first layer is temporarily held in (152 mm) with 1/4 in. (6 mm) wing nuts and 1/4 in. place using filament tape.The first layer does not (6 mm) washers. require stainless steel banding. • 4 in. (102 mm) long steel hollow tubing to fit The second layer of 3MTM Fire Barrier Duct Wrap 615+ threaded rods. blanket is wrapped around the perimeter of the previously installed first layer of 615+, and is cut to at • Minimum 4 pcf(64 kg/m3)density mineral wool or length to overlap itself not less that 3 in. (76 mm). The scrap pieces of 3MTm Fire Barrier Duct Wrap 615+. centerline of the second layer of blanket should be • 3MTm Fire Barrier Water Tight Sealant 1000 NS, 1003 centered over the overlap of the first layer. The second SL or 3MTm Fire Barrier Silicone Sealant 2000+. layer of blanket requires longitudinal overlap onto adjacent blankets of not less than 3 in. (76 mm).The B. Storage second layer of blanket is also held in place using filament tape. The second layer of wrap requires The 3MTm Fire Barrier Duct Wrap 615+ and 3MTm Fire permanent fastening with stainless steel banding or Barrier Water Tight Sealant 1000 NS, 1003 SL or rows of weld pins (impaling or cup-head style). 3MTM Fire Barrier Silicone Sealant 2000+ must be stored in a dry warehouse environment. Pallets should not be stacked. 2 In accordance with the tolerances in ASTM C 892 Standard Specification for High-Temperature Fiber Blanket Thermal Insulation. 3