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Chapter 3 — System Design <br /> Page 3 -6 <br /> REV. 3 <br /> 2a. High - Proximity Backshelf Protection — When using the <br /> 2L nozzle for range protection with high - proximity backshelf, <br /> 1H the maximum length of burners being protected must not <br /> 501N. exceed 28 In. (71 cm) and the maximum area of the burners <br /> (127 cm) must not exceed 336 sq. In. (2167 sq. cm). The backshelf <br /> must be a minimum of 18 In. (45.7 cm) above the top of the <br /> iH <br /> 40 IN. range and may overhang the burner by a maximum of 11 in. <br /> (102 cm) (28 cm). <br /> / NOTE: Although most shelves exceed 11 in. (28 cm) in over - <br /> POINT NOZZLE =_ I`` i \ 'l NOZZLE all depth, make sure the shelf does not exceed 11 in. (28 cm) <br /> �� LOCATION AATION overhang of the burner. <br /> I� <br /> Nozzle must be located on the front edge of the front burner <br /> 121N, 28 IN. (71 cm) and aimed at a point 10 in. (25 cm) forward from the back <br /> (31 cm) MAXIMUM edge the back burner on the front -to -rear centerline. <br /> MAXIMUM LENGTH (L) <br /> WIDTH (W) Nozzle must be mounted 24 to 35 in. (61 — 89 cm) above the <br /> HIGH hazard surface. See Figure 3 -5a. <br /> PROXIMITY <br /> 006100PC <br /> SHELF CAN OVERHANG BURNER(S) <br /> Figure 3 -4a. \ \ A MAXIMUM OF 11 IN. (28 cm) <br /> The Model 1L nozzle, Part No. 551066, is used for low prox- � \ <br /> imity small range protection. This nozzle Is a one (1) flow �\ <br /> nozzle. The range can be equipped either with or without \ \\ \\ <br /> a backshelf. Either type requires the same nozzle require - <br /> 18 IN. <br /> meets. The nozzle must be located 22 in. (56 cm) from either ` (45.7 cm) <br /> end of the hazard area centered from left to right. It must be \ MIN. <br /> MAX. 28 IN. <br /> 13 in. to 24 in. (33 to 61 cm) above cooking surface, and 24 -35 (71 cm) <br /> aimed at a point one half the distance of whatever the height (s1 -89 cm) <br /> dimension of the nozzle is. When determining nozzle and aim ' `�� <br /> point locations, both measurements are to be taken from the 41014—"Igilill.— <br /> same end of the hazard area. Example: The nozzle is 10 IN. (25.4 cm) <br /> mounted 20 in. (51 cm) above the cooking surface. The airs / FR OM B ACK <br /> point from the edge of the hazard would then be 10 in. (25 BU RNER <br /> �� FRONT TO REAR 008845 <br /> cm) which is one half the nozzle mounting height dimension. CENTERLINE <br /> See Figure 3-4b. Note: Nozzles must be placed at or below HIGH PROXIMITY BACK SHELF PROTECTION WITH THE 2L NOZZLE. <br /> the shelf, within the nozzle height limitations. AREA OF PROTECTION PER NOZZLE: MAX. LENGTH OF BURNER <br /> GRATES 28 IN. (71 cm) AND MAX. AREA OF BURNER GRATES NOT <br /> EDGE OF TO EXCEED 338 5Q. IN. (2168 sq. cm) <br /> HAZARD AREA <br /> (FRONT OR BACK) Figure 3 -5a. <br /> J 22 IN. <br /> \ I / (56 cm) <br /> I 1 / 1L <br /> x <br /> 22 / I \ <br /> (56 IN. cm) 24 <br /> 1 \ I / (61 (H) <br /> IN. cm) <br /> j ' 13 IN. <br /> / I \ (Hi <br /> �' ( cm) <br /> I <br /> 1 I 1 <br /> 112-H I I HAZARD <br /> 1/2 (H) ---III mown <br /> SURFACE <br /> Figure 3 -4b. <br /> ULEX 3830 <br /> August 1, 2005 PN551274(3) <br />