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Chapter 3 – System Design <br /> Page 3 -1 <br /> REV. 3 <br /> CHAPTER 111 <br /> SYSTEM DESIGN <br /> This chapter will detail the basic information necessary for The nozzle(s) must be installed on the centerline of the duct, <br /> proper design of the PYRO -CHEM KITCHEN KNIGHT II with the tip located 0 to 6 In. (15.2 cm) into the opening, and <br /> Restaurant Fire Suppression System. However, before aimed directly into the duct opening. See Figure 3 - 1a. <br /> attempting any installation, it Is necessary to attend a <br /> Factory Certification Training Class and become Certified to ► In installations where a UL listed damper assembly is <br /> design the PYRO -CHEM KITCHEN KNIGHT 11 Restaurant employed, the duct nozzle can be installed beyond the 6 in. <br /> Fire Suppression System. The chapter Is divided into three (15.2 cm) maximum, to a point just beyond the damper <br /> (3) sections: assembly the* will not interfere with the damper. Exceeding <br /> • Nozzle Coverage and Placement the maximum of 6 in. (15.2 cm) in this way will not void the <br /> • Piping Limitations . UL fisting of the system. <br /> • Detector Requirements <br /> Each of these sections must be completed before attempting 140 <br /> any installation. <br /> NOZZLE COVERAGE AND <br /> PLACEMENT , o M. <br /> INTO DUCT <br /> This section will provide guidelines for determining nozzle <br /> IL OR 2D <br /> type, positioning, and quantity for duct, plenum, and appli- NOZZLE <br /> ance protection. <br /> Duct Protection <br /> It is not required that the fan be shut down or the exhaust 1 /2wi <br /> duct be dampered for the system to operate properly. — — <br /> • All duct protection is UL listed without limitation of maximum <br /> duct length (unlimited length). This includes all varieties of 008172PC <br /> ductworks both horizontal and vertical including ducts that . — i/2 L <br /> run at angles to the horizontal and ducts with directional <br /> - bends. ' L <br /> Duct protection requires that a nozzle be positioned to Figure 3 - 1a. <br /> ► discharge into the duct. Two nozzles are available for duct <br /> protection. <br /> The Model IL Nozzle, Part No. 551026, Is a one (1) flow <br /> nozzle. A single IL nozzle is capable of protecting square or <br /> 'rectangular ducts with a maximum perimeter of 50 In. <br /> (127 cm), with the diagonal being a maximum of 18 3/4 In. <br /> (47.6 cm). It can also protect a round duct with a maxlinum <br /> diameter of 16 in. (40.6 cm). <br /> The Model 2D duct nozzle, Part No. 551038, is a two (2) <br /> flow nozzle. A single 2D nozzle is capable of protecting <br /> square or rectangular ducts with a maximum perimeter of <br /> ■ 100 in. (254 cm), with the diagonal being a maximum of <br /> ■ 37 3/8 In. (94.9 cm). It can also protect a round duct with a <br /> maximum diameter of 31 7/8 in. (81 cm). <br /> When two (2) 2D duct nozzles are used to protect a single <br /> duct, the cross sectional area of the duct must be divided <br /> into two equal symmetrical areas. The nozzle must then be <br /> installed on the centerline of the area it protects and aimed <br /> directly into the duct opening. <br /> ULEX 3830 <br /> PN551274(3) August 1, 2005 <br />