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<br />r <br /> <br />"' <br /> <br />r <br /> <br />Placement in Duct <br /> <br />" <br /> <br />\.. <br /> <br />Duct Protection <br />The ADP nozzle. PIN B 1200 II. Is used for protec- <br />tion of the exhaust ductwork. <br /> <br />The duct cross secllon can be any shape (t.e.. <br />round. square. or rectangular) and the duct Itself can <br />be of unllmlted length. In accordance with NFPA 96. <br />the exhaust fan should be left running at the Ume of <br />system discharge. A damper. if present. should be left <br />open at system discharge. However. If the damper Is <br />closed. the system designer must Insure that the duct <br />nozzle discharge ts not impeded by the closed damper. <br /> <br />~ <br /> <br />Protection of Ducts 0 to 50 inches <br /> <br />perimeter <br />One ADP nozzle. PIN BI2001l. Is required for <br />protection of a duct with a perimeter up to 50 Inches. <br />(See Figure AD-41. Length of duct Is unlimited. <br /> <br />The nozzle Is located at the geometric center of the <br />cross-sectional area that It Is protecUng. and Is located <br />In the duct within six Inches of the entrance. <br /> <br />Note: All Range Guard systems are listed by UL for <br />use with the exheust fen either on or off when <br />the system is discharged. <br /> <br />" . <br />. . <br /> <br />DUCT <br /> <br />~ <br /> <br />110OO <br /> <br />DUCT PERIMETER UP TO AND INCLUDING 50 INCHES <br />11.78 inches maxilTlll1l diagonal <br /> <br />12.~tE <br />MAX. I <br />...:i..... <br /> <br />SQUARE DUCT <br /> <br />~ <br /> <br />c. <br />: r- AOP NOZZLE <br />:1 I ..! <br />i ~2mm) <br /> <br />DUCT ENTRANCE <br /> <br />t'~~j <br />rn <br /> <br />I+- -S"-+I <br />T rn 11.78 inches maximum lflll!lOl18l <br /> <br />"A" <br /> <br />..:!... <br />RECTANGULAR DUCT <br />2 "A' + 2 "B"" &SIN <br /> <br />ROUND DUCT <br /> <br />Cl OF VERTICAL DUCT <br /> <br />J <br /> <br />~ AIM POINT <br /> <br /> <br />tit; <br />I <br />I . <br />AOP NOZZLE " . <br />-. ~ I Cl OF HORIZONTAL DUCT <br />I <br /> <br />VERTICAUHORIZONTAL DUCT <br /> <br />2 to 4 inches <br />Nozzle tip 10 duct hip <br /> <br />"- <br /> <br />~ <br />