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SECTION N—SYSTEM DESIGN <br /> UL EX. 5174 6-5-98 Page 4-6 <br /> REV 1 <br /> PLENUM PROTECTION <br /> The PIRANHAsystem uses the"AP"Nozzle(Part No 423480)for <br /> plenum protection. � <br /> ►One"AP"nozzle will protect 11 linear ft. (3 4 m) of pienum length, <br /> either single filter bank or"V"bank.The nozzle must be located as <br /> shown in Figure 10, and aimed down the length of the plenum �� <br /> The filter height must not exceed 25 in. (63.5 cm) <br /> 48 IN. � <br /> �—MAXI MUM� <br /> / <br /> FIGURE 12 <br /> 000ao- <br /> MAXIMUM 25 IN. <br /> FILTER - <br /> AP NOZZLE 11 F�MAXIMUM <br /> PLENUM LENGTH <br /> 002550 <br /> � INCORRECT <br /> — 1/3 W'� � <br /> W FIGURE 13 <br /> aoo��A <br /> aa w. NOZZLE PLACEMENT SUMMARY CHART <br /> �MAXIMUM <br /> AP NOZZLE Nozzle Maximum <br /> Hazard Type Height Spacing Location <br /> � Appliances "AP," 40-48 in. 11.5 in.from 4 to 16 in. <br /> (Overlapping Part No above edge of forward of <br /> I nnaxinnuM zs iN. Protection) 423480 top of hazard zone hazard zone <br /> Fi�rER �High appliance 25.5 in. center line. <br /> 11 Ff.MAXIMUM ;Proximit center Nozzle must <br /> PLENUM LENGTH Y <br /> to center be aimed at <br /> of nozzles hazard zone <br /> � centerline <br /> °°255, ►Appiiances "DL," 13-24 in. 8 in.from 13 to 19 in. <br /> (Overlapping Part No above edge of from back <br /> . FIGURE 10 Protection) 426093 top of hazard zone of hazard <br /> �oW appliance 12 in. zone <br /> For a plenum, either single or "V" bank, with a linear extension Proximity center Nozzle must <br /> longer than 11 feet(3.4 m),each filter bank may be protected using to center be aimed <br /> one plenum nozzle every 11 ft. (3.4 m) or less depending on the of nozzles straight down <br /> overall length of the plenum.See Figure 11 The nozzles may point Plenum "AP," Even with 11 ft. Aimed <br /> in the opposite directions as long as the entire plenum area is pro- Part No top of per nozzle horizontal <br /> tected, and the 11 ft. (3.4 m) limitation is not exceeded. See Figure � 423480 filter(s) <br /> 12.The nozzle positioning shown in Figure 13 is not an acceptable <br /> method of protection because the plenum area directly under the ►Duct "DL," 0-8 in. 100 in. 0-3 in.from <br /> tee is not within the discharge pattern of either nozzle. Part No i�to duct perimeter front edge of <br /> . 426093 or circum- duct aimed <br /> ference per into center <br /> nozzle of duct <br /> � unlimited <br /> length <br /> FIGURE 11 <br /> �oo�os <br />