6919 EVERGREEN WAY MEMOS MEXICAN RESTAURANT 2026-01-05

Chapter 3—System Design j Page 3-3 Revision 4 Plenum; Protection APPLIANCE PROTECTION Nozzle: N-i HP N Flow Poinfl 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. ma'y render u`ie 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(11 now point nozzle hat 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 he 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 used). Plenum:V-bank Nozzle Placement : 3 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 5 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:Single Filter Bank Nozzle PlacementAppliances Reguirina Multiple Nozzles 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 he filter and 113 of he vertical nozzles because of their size. If the size of an height of he 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 he plenum. See Figure 3-7. accomplished by dividing the hazard area into individual —N— _m, zones that comply with the parameter of the listing for � that appliance. In this case, each zone will be protected \\ ��'� as an individual appliance' with respect to nozzle _ placement and aiming. V BANK RANGE PROTECTION (uaz' rT " Two (2) Burner Range—LOW Proximity MAX. SWGLE3ANK Nozzle: N-1LP(1 Flow Point) 1 Figure 3-7. Model N-1 HP Coverage: 12"(30.5 cm)x 24"(61 cm) Maximum Plenum Nozzle Placement and Aiming (measured burner edge to burner edge) Note: These examples are Lypical and do not represent Nozzle Ht 16'(41 cm}—30"{76 cm} every acceptable nozzle configuration, only a representative sample of them. Placement: 3"(7.6 cm)from either edge of appliance. . on appliance's long centerline. Designer Note For plenums that exceed 12 feet (3.7 m) in lengt' Aim point: 6"(15 cm)from opposite edge of .4 and therefore require multiple noes, it is 1 appliance,on appliance's long centerline. -commended that the total length be divided into l equally sized protection zones and protected ,l The Model N-1 LP nozzle is a one (1)flow point nozzle accordingly. So a 16 foot (4.9 m) long plenum 1 that can protect a range cooking area of 12" (30.5 cm) should be divided into two 8 foot(2A m)zones,with wide by 24" (61 cm) deep. The nozzle must be located a nozzle prcteddng each, as opposed to a 12;mt 1 to' (4i cm) to 31D" j73 c.n)j above "the cooking surface 11 (3.7 rn) One a a?loot{1.2 m)zcre_ and positioned on the appliance's Iong centerline within ?.rf : Sul=,'-i iti1 ULEX 6885 ULC-EX 6886 January 1, 2011