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I <br /> SECTION IV — SYSTEM DESIGN , <br /> ' UL EX3470 ULC EX3470 Page 4-17 � <br /> 7-1-09 REV.6 I <br /> � <br /> ►Range Protection(With or Without Back Sheif/Obstructlon) ►Range Protectlon 260(2-Flow)Noule(With or Without Back <br /> ►When this type of hazard is equipped with a back shelf or other ShelVObstructlon) <br /> ►similarly sized obstruction located above the range top, two pro- Single and muitipie burner ranges can be protected using a 260 <br /> tection options are available:One requires a 1 F nozzle, Part No. noule,Part No.419341. The nozzle tip is stamped with 260 indi- <br /> 419333, and the other option requires a 260 nozzle, Part No. cating that it is a two-flow nozzle and must be counted as two flow <br /> 419341. numbers. <br /> ►Range Protection 1 F(1-Flow)Noule(With or Without Back When using the 260 nozzle for range protection with or without <br /> Shetf/Obstructton) 'back shelf or other similarly sized obstruction,the maximum length <br /> of burner grates being protected must not exceed 32 in.(81 cm) <br /> Single and multiple bumer ranges can be protected using a 1 F and the maximum area of the burner grates must not exceed ' <br /> nozzle, Part No.419333.The noule tip is stamped with 1 F indi- ►384 in.2(2477 cm2).Nozzle must be Iocated on the front edge of <br /> cating that it is a one-flow noule and must be counted as one flow the burner grates and aimed at a point 10 in.(25 cm)trom the back <br /> number. edge of the burner grates.Noule must be mounted 30 to 40 in. <br /> When using the 1 F nozzle for range protection with or without back '(�6 to 102 cm)above the hazard surface.See Figure 38. <br /> ►sheif or other similariy sized obstruction, the maximum length of � <br /> the burner grates being protected must not exceed 28 in.(71 cm) z80 NO2ZLE <br /> and the maximum area of the burner rates must not exceed SHELF OR OTHER SIMILAHLY SIZED <br /> g / OBSTRUCTION CAN OVERHANO BURNER(S) <br /> ►336 in.2(2168 cm2).See Figure 37 for nozzle location details. Bv n MnxiMUrn oF i i iN.�za cm� <br /> 1 F NOZZLE � I <br /> � SHELF OR OTHER SIMILARLY SIZED I <br /> OBSTRUCTION CAN OVERHAN(i BURNEq(S) I 1B IN. <br /> BY A MAXIMUM OF 17 IN.(28 cm) (45��) <br /> I 30•40 IN. I MINIMUM <br /> I � (76•102 cm) � <br /> � AIM �IN. I <br /> 40•48 IN. � POINT (51 cm) <br /> (702•122 cm) I MINIMUM <br /> I /I <br /> 10 IN. <br /> I (25 cm)FROM <br /> BACK OF <br /> BURNER <br /> � GRATES <br /> �a�". • FIGURE 38 <br /> (35.8 cm) <br /> 12 IN. 14 IN. <br /> MAXIMUM °0°�°' <br /> (30.5 cm) (35.8 cm) <br /> MAXIMUM FRONTTOREAR MAXIMUM <br /> CENTERLINE <br /> 1F NOZZLE LOCATED OVER FHONT EDGE OF BURNER GRATE AND ORIENTED <br /> SO NOZZLETIP FLATS ARE PARALLEL WITH BUHNER ORATE FRONTTO REAR <br /> CENTERLINE AND SHALL BE AIMED AT THE CENTER OF THE COOKINO SURFACE. <br /> � FIGURE 37 <br /> 000278 <br /> I <br /> I <br /> I <br />