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• • • December 2008 Section 3 Design Page 3—2 • Amerex Restaurant Fire Suppression System (EX 4658) • DUCT PROTECTION LIMITATIONS — • TWO NOZZLES (2 x P/N 16416) • • Two Amerex Duct Nozzles (P/N 16416)will protect ducts with a perimeter of 51 inches to 84 inches (129.5 —208.3 cm) or a maximum diameter of 26 • inches (66 cm). To correctly position the nozzles in a rectangular duct divide • the duct along its longest side into four equal distances. A circular duct should be divided along a centerline into four equal distances. A nozzle 1/4 • should be placed at one quarter of the duct's width (or diameter) with both 1I2 • nozzles on the centerline, paced 2-8 inches (5.08 - 20.3 cm) into the duct opening and aimed at the center of the modular cross 1/4 • section of the duct. Each nozzle has one flow point. c �` • 411. NOTE: In no case can the diagonal dimension of • each module exceed 18.8 inches (46 cm). • 1 Iiill0 • ` 6"MAX.DIA. 41 14-ir --:1 • 34" • DUCT PROTECTION LIMITATIONS —MULTIPLE NOZZLES (P/N 16416) • Protecting ducts larger than 84 perimeter inches (208.3 cm) utilizing the single flow point nozzle (P/N 16416). Divided the perimeter by 42 (104 cm) and round up to the next whole number. Divide the duct cross section • into the same number of equally sized modules. Check the modules to insure they are equal to or less than • 50 perimeter inches and have a diagonal equal to or less than 18.8 inches. If they meet the criteria then • place a duct nozzle in the center of each module, 2"-8" into the hood/duct opening. • DUCT PROTECTION LIMITATIONS 100 IN. PERIMETER • TWO—1Y2 FLOW POINT NOZZLES (P/N 11983) • The Amerex Solid Fuel Appliance/Duct Nozzle (P/N 11983) is listed • to protect a restaurant cooking exhaust duct of unlimited length, unlimited changes in direction and up to 100 perimeter inches (254 • cm) or 32 inch diameter (81.2 cm) using two nozzles. The nozzles total three flow points and to properly position the nozzles, a • rectangular duct should be divided along its longest side into four °I**Ili 6 equal distances. A circular duct should be divided along its center4� line into four equal distances. The nozzles are to be placed at one • quarter and three quarters position of the duct width (or diameter) L0000°"1/21° • with both nozzles on the center line, placed 2 - 8 inches (5.08 — 20.3 cm) into the duct opening and 1m • aimed straight up in a vertically run duct. • NOTE: In no case can the diagonal dimension of I�. �� • the duct exceed 37.2 inches (94.4 cm) _-- without adding additional duct nozzles. j • , • NOTE: The use of one Duct Nozzle P/N 11983 is i • permitted for duct 50 perimeter inches or �! „ , , less in the same manner as Duct Nozzle `"' • 16416. • \\3-2"MAX---. •