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. , , <br /> System Design <br /> 3-6.1.1 DUCTS <br /> The ADP nozzle, P/N 87-1 200 1 1-00 1, is used for protection of the e�aust ductwork. <br /> The duct cross section can be any shape, not including obstructions (i.e., round, square, or <br /> rectangular) and the duct itself can be of unlimited length. In accordance with NFPA 96, the e�aust <br /> fan should be left running at the time of system discharge. This will help to remove smoke and other <br /> airborne materials and gases from the hazard area in the event of a fire. Check with the Authority <br /> Having Jurisdiction for local requirements. A damper, if present, should be left open at system <br /> discharge. However, if the damper is closed, the system designer must insure that additional nozzles <br /> are required. <br /> 3-6.1.1.1 Protection of Dncts 0 to 50 inches in Perimeter <br /> One ADP nozzle, P/N 87-120011-001, is required for protection of a duct with a perimeter up to 50- <br /> inches (refer to Figure 3-29). Length of duct is unlimited. <br /> The nozzle is located at the geometric center of the cross-sectional area that it is protecting, and is <br /> . located in the duct within six inches of the entrance. <br /> Note: All Range Guard systems are listed by UL and ULC for use with the exhaust fan either on or <br /> off when the system is discharged. <br /> DUCT <br /> � <br /> HOOD <br /> DUCT PERIMETER UP TO AND INCLUDING 50 in.(1270 mm) <br /> 11.78 in.(300 mm) <br /> MAX.DIAGONAL 15.91 in. <br /> (404 mm) <br /> ♦ FMAX.♦ I�—<<B,��I <br /> 12.5 in. � 11.78 in.(300 mm) <br /> (318 mm) — I � MAX.DIAGONAL <br /> MAX. I ��p`,� <br /> ♦ —O— � <br /> SQUARE DUCT I RECTANGULAR DUCT <br /> 2"A"+2"B"=65 in.(1651 mm) <br /> ROUND DUCT <br /> � ¢ OF VERTICAL DUCT <br /> � i <br /> � ADP NOZZLE i <br /> � .� AIM POINT <br /> i � VERTICAL/HORIZONTAL DUCT � <br /> i <br /> 1 - ' * <br /> 0-6in.(0-152mm) � � <br /> ADP NOZZLE � i <br /> DUCT ENTRANCE � I , � OF HORIZONTAL DUCT <br /> �� <br /> � <br /> 2 to 4 in.(51 to 102 mm) <br /> NOZZLE TIP to DUCT HIP <br /> Figure 3-29. Duct Protection Using Single ADP Nozzle, P/N 87-120011-001 \\\\\\ <br /> S � � � <br /> [ <br /> ) / <br /> P/N 60-9127100-000 3-35 April 2009 <br />