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SECTION IV — SYSTEM DESIGN ■ UL EX3470 ULC EX3470 Page 4-43 7-1-09 REV.6 dVERLAPPING NOZZl.E COVERAGE ►• For appiiance hazard su�faces with listed protection exceed- ing the standard hazard zone of 28 in.(71.1 cm) in depth,the ►Overtapping Coverage—Option 1 hazard surface(s) must be aligned with the back edge of the For each group of protected appliances under a common hood(s), hazard zone,with the front edge overhanging the front edge of the overlapping nozzles must be located from right to left so that the zone.See Appliance Chart,Table 1. each end nozzle is located a maximum of 6 in.(15.2 cm)inside the • Far appliance hazard surfaces that exceed the listeci protec- outside edge of the cooking hazard of each end appliance,and the tlon sizes, multlple zones must be utilized.Align entire hazard inside overlapping nozzles must be Iocated beiween ihe two end surface area within the multiple zones. noules at a maximum spacing of 12 in.(30.5 cm�. • All hood,duct,individual appliance,and plping limitations are as Hazard Zone specified fn the R-102 Design, Insiallation, ReCharge and The hazard zone is defined as a theoretical,flat and Ievel,rectan- Mafntenance Manual, Part No.418087. gular surface,that includes all of the cooking hazards of the pro- • All appliance protection currently listed in the R-102 Design tected appEiances under a cnmmon hood{s).The purpose of the Manual,Part No.418067,is a{so approved protection.Zone pro- hazard zone is to provide a means of[ocating the appliances and teetion can be considered aptlonal protection. the overEapping noales, as well as aiming the overlapping noz- zles.The hazard zone measures 28 in. (71.1 cm) deep by the TABLE 1 length of the cooking hazard(s).The centerline of the hazard zone Overlapping Nouie Coverage(Zone Protection) must bisect the 28 in.(7i.1 em)depth(from front to back)and run from right-to-left for the full width of the hazard zane. ApplianceType Maximum Cooking Hazard Overlapp9ng Nozzfe Appliance Protectlon Fryer 34 in.(86.4 cm)Deep x 5.8 ft2 (0.5 m ) Overlapping Nozzle Appliance Protection is defined as protection Griddle 30 in.(76.2 cm)Deep x Un�imited Length of cooking appliances by nozzles spaced unitormly at unfform ele- vaFions under a common hood(s).Overlapping protection of appli- Range 28 in.(71.1 cm)Deep x Unllmited Lengih ances is continuous for the fu11 fength of the hood or divided when Wok,Maximum 30 in.(76.2 cm)Diameter x 8 in. group(s) of protected appliances are separated by counters or (20.3 cm)Deep applfances not requiring protection. Wok,Minimum 11 in.(27.9 cm)Diameter x 3 in. Full hood continuous protectfon is defined as overlapping noz- (7.6 cm)Deep zle appliance protectlon that covers the appliance line-up located 8raising Pan/Tilt 34 in.{86.4 cm}Deep x Unfimited under the total hood length.All appliances requiring protection are Sklllet' l.ength the appliances under the hood that can be an ignition source of Lava Rock 32 in.(81.3 cm)Deep x Unlimited grease in the hood,grease remo�al device or the duct. Char-Broiler L.ength Group protection is defined as overiapping nozzle appliance pro- Charcoal Broiler 32 in.(81.3 em)Deep x Unlimited Length tection that protects individual hazard zones located under a com- (4 in.(10.2 cm)Maximum Fuel Depth} mon hood.These "groups" of applfances may be separated by Mesquite Wood 32 in.(81.3 cm)Deep x Unlimited Length appliances not requiring protection, such as steam equipment or work tables, or by dedicaled appliance protection,such as sala- Sroiler (12 in.(30.5 cm)Maximum Fuel Depth) mander broilers. Gas Radiant 38 in.(81 4 cm}Deep x Unlimited See Figure 91d (full hood continuous protection)and Figure 91e Char-Broiler Length (multiple group protection} Electric Char-Broiler 34 in.(86.4 cm)Deep x 20 in.(50.8 cm) 'See Figure 91a tor nozzle bCalion f Ded(cated Noule Applfance Protectlon Appliance protection using dedicated nozzle coverage is defined as protection of cooking appliances with enclosed cooking haz- � r ards, such as upright broilers, whlch cannot be protected with `��0�8IN.(0-15 cmE COVER MUST NOT ' I t overlapping nozzles and therefore must be protected with nozzles INTERFERE WITH � � j dedicated to the appliance. Eoce oF DVSCHARGE � Generat Design Limitatfons PATT�N � 1 io�as m� � Maximum depth of zone is 28 in.(71.1 cm). � � 1 • The 245 nozzle,Part No.419340,is the only approved nozzle for � overlapping(zone)protection. �t ZONE • Nozzle must be located 0 in.to 6 in.(0 cm to 152.cm)forward � �/ of zone centerline, aimed back at the zone centerline. • Nozzles must be spaced a maximum of 6 in. (15.2 cm} from I each end of hazard and then a maximum of 12 in.(30.5 cm)on center for the remaining overlapping nozzles until the complete � h8Z8fCI IS COVEfBCJ. ZONE CENTER LINE ' FIGURE 91a ��