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SECTION IV — SYSTEM DESIGN <br /> UL EX3470 ULC EX3470 Page 4-43.1 <br /> REV 0 7-1-09 <br /> OVERLAPPING NOZ2LE COVERAGE(Continued) 4. The overlapping appliance nozzles must be located 0 in.to <br /> Overlapping Appllance Noule and Hazard Zone Locations 6 in.{0 cm to 15.2 cm)forward of fhe centerline or aimline of <br /> the selected hazard zone.See Figure 91 c. <br /> 1 AI!overfapping appliance nozzles must be the "245" nozzle, <br /> Part No.419340,and must be located under a common hood '245 NOZZLE—NOZZLE MUST BE AIMED STRAIGHT <br /> at the same height above the hazard zone, in a straight line DOwN OR BACK AT CENTEflLINE OF <br /> �_ HAZARD ZOIJH <br /> from right to left and aimed at the centeriine of the hazard <br /> zone.The overlapp(ng rtozzie is used for both continuous over- <br /> lapping and multiple group overlapping protection. <br /> 2. The hazard zone must be positioned(located)so that all appli- <br /> ance hazard surfaces are within the zone.For appiiance haz- <br /> ard suriaces wilh listed protection exceeding the standard ' e iN. <br /> hazard zone size of 28 in.(71 cm)in depth(see Table 7),the ��5z u„� 45 IN. <br /> (t.i ml <br /> hazard surface{s)must be aiigned with the back edge of the ,w„� <br /> hazard zone,with the front edge overhanging the tront of the �i m) <br /> zone. <br /> 3 The overlapping appliance nozzles must be located 40 in.to <br /> 45 in. (1 m to 1 1 m) above the top surface of the protected <br /> appliances.See Figure 91c. <br /> Exceplion No. 1•Nozzle dimensions for wok protection are FRONT� �"BACK OF ZONE <br /> measured to bottom of wok. Exception No. 2:When using OFZONE <br /> overlapping appliance nozz3es in areas where there is a back Z8�N CENTERLINE OF <br /> shelf,the nozzle cannot be positioned in the shaded area as �,,.��,„� ��ARD ZONE <br /> shown in Figure 91b. zoNe <br /> FlGURE 91c <br /> Also, back shelf must not extend more than 11 in.(27.9 cm) �9+5 <br /> over the hazard zone and cannot be less than 20 in.(50.8 cm) <br /> above the hazard zone.See Figure 91 b. <br /> /--OVERIAPPING NOZZLE(S) <br /> qs �� CANNOT BE POSITIONED <br /> qq IN TNlS SNADED AREA <br /> � <br /> 42 <br /> 4t <br /> 40 <br /> 6 5 4 3 2 1 <br /> I <br /> .+—CENTER LINE OF <br /> HAZARD ZONE <br /> BACK <br /> /SHHLF <br /> �� <br /> 1 T <br /> 11 IN.(27.9 cm) I <br /> MAXIMUM <br /> 20 IN. <br /> (50.8 cmJ <br /> MINIMUM <br /> , 1 <br /> �.� <br /> � 28 IN.p1.1 cm)�>I <br /> FIGURE 91b <br /> �ma <br />