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� Cha ter 3—S stem Desi n P Y 9 Page 3-3 Revision 5 � Plenum Protection APPLIANCE PROTECTION '� Noule: N-1 HP(1 Flow Point) Each different appliance must be protected in a specific � manner with regard to nozzle selection, placement, and Coverage: Length: 12 feet(3.7 m) max. aiming. No deviations from these parameters are Width: 4 feet(1.2 m) max. allowed and failure to comply completely with these requirements will void the UL Listing of the system and Placement: See Figure 3.7. may render the system ineffective. Aim point: See Figure 3.7. In order to properly understand this section, several key terms need to be defined in advance. The Model N-1HP nozzle is a one (1) flow point noule that can protect a plenum (either single bank or V-bank) DESIGN TERMINOLOGY of 12 feet (3.7 m) in length and 4 feet (1.2 m) in width per nozzle. Larger plenums must be divided into 12 foot Nozzle Height: The distance from the tip of the (3.7 m) sections, with each section protected with a discharge nozzle to the top surface of the appliance � separate nozzle. See Figure 3-7. (except for woks, in which case the bottom of the wok is �i used). � Plenum:V-bank Noule Placement Hazard Area. All nozzle coverages include the The nozzle must be located at the center of the V-bank maximum size of the hazard area they can protect. width and down 1/3 of the vertical height,within 6 inches Hazard area is NOT the overall size of the appliance (15 cm) of the end of the plenum or plenum module and being protected, but rather the actual size of the , aimed down the length of the plenum. See Figure 3-7 portion of the appliance used for cooking. � Plenum:Sinqle Filter Bank Nozzle Placement Appliances Reauirina Multiple Nozzles �i The nozzle must be located at a point that is 2" (5.1 cm) Some appliances may need to be protected by multiple from the back edge of the filter and 1/3 of the vertical nozzles because of their size. If the size of an height of the filter,within 6 inches(15 cm)off the end of appliance is larger than the approved coverage for that the plenum or plenum module and aimed down the appliance, multiple nozzles must be used. This is length of the plenum. See Figure 3-7 accomplished by dividing the hazard area into individual _ ,,,W"'— r,,,H zones that comply with the parameters of the listing for that appliance. In this case, each zone will be protected t � H as an individual appliance with respect to nozzle placement and aiming. V BANK 12 FT � ,nx RANGE PROTECTION (3.7m) � ,z Fr r�"'""� H �� + Two (2) Burner Range–LOW Proximitv (3.7m)/ (scml MAX. . °`o�`�,� � SiNc�E BANK. NoZZIe: N-1 LP(1 Flow Point) �o• Figure 3-7. Model N-1HP Goverage: 12" (30.5 cm)x 24"(61 cm) Maximum Plenum Noule Placement and Aiming (measured burner edge to burner edge) Note: These examples are typical and do not represent every acceptable noule configuration, only a Noule Ht: 16" (41 cm)–30"(76 cm) representative sample of them. Placement: 3"(7.6 cm)from either edge of appliance, on appliance's long centerline. Desiqner Note For plenums that exceed 12 feet (3.7 m) in length Aim point: 6" (15 cm)from opposite edge of � and therefore require multiple noules, it is appliance, on appliance's long centerline. recommended that the total length be divided into � equally sized protection zones and protected The Model N-1LP noule is a one (1) flow point nozzle accordingly. So a 16 foot (4.9 m) long plenum that can protect a range cooking area of 12" (30.5 cm) should be divided into two 8 foot(2.4 m)zones,with wide by 24" (61 cm) deep. The nozzle must be located - a noule protecting each, as opposed to a 12 foot 16" (41 cm) to 30" (76 cm) above the cooking surface (3.7 m)zone and a 4 foot(1.2 m)zone. and positioned on the appliance's long centerline within 3" (7.6 cm) of either the front or back edge of the � BPN. BFR-TM ULEX 6885 ULC-EX 6885 January 1, 2013 P 1 �