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SECTlON lV -- SYS7ENi DESiGN <br /> UL EX3470 ULC EX3470 Page 4-6 <br /> REV.7 7-1-09 <br /> Plenum Protectton(Continued) <br /> HORIZONTAL pROTECTION—OP710N 2 For a plenum, either single or"V"bank, with a linear extension <br /> 1 W NOZZLE—�'ART N0.419336—"V"BANK PROTECTION longer than 1Q ft(3.1 m),each bsnK may ba protected using one <br /> iN nozzie every 10 ft (3.t m) or less depending on the averall <br /> One 1 W nozzle will protect fi Ifnear feet(i.8 m)of"V"bank plenum. tength of the plenum.See Flgure 12.The nozzles may point in tha <br /> The noaie must be mounted horizontally, pos�ianed 1/3 the filter oppoaite directions as long as ihe enGre plenum area is protected, <br /> height down irom the top of the filter.tVozzies can be la;ated at 8 ft and the 10 ft(3.1 m)1lmitatiQn is not exceeded.See Figure 13.The <br /> (1.8 m)spacings on longer plenurns.The nozzie must be positioned noz2le positioning shown in Figure 14 is not an acceptable method <br /> 0-6 in.(0-15 cm)irorn the end of the hood to ihe tip of the noule. of protectlon because the plenum area direclly under the tee is not <br /> See Fgure 10. withfn the dEscharge pattern of efcher nozzle. <br /> 1 W NOZZLE 10 FT(3.1 m►� <br /> MAXIMUM <br /> i toFrp.t m) <br /> i�iH' � MAXIMUM <br /> HEIpHT OF 1'\ <br /> FlITEH�H) 10 FT(3.1 m) �� <br /> 8 F7(t.8 m) MA%IMUM � <br /> MAXIMl1M <br /> �ii i��—'S <br /> MAXIMUM f� 1 <br /> 3D F7{9.1 m) <br /> FIGURE 12 <br /> � <br /> 10 FT(3.1 m)� <br /> MAXIMUM <br /> Fi�uR��o <br /> 006721 10 FT(3.1 m) <br /> ►TWO(2} 1 N NOZZLES — PART N0. 419335 —"V" BANK PHO- "'"'0""u"" <br /> TECTION � <br /> Two 1 N nazzles will rotect 10►inear faet 3.i m b 4 R 12 m �o�«�"'� <br /> p � � y � � MAXIMUM <br /> wide of "V"bank plenum.The noules must be mounted in the \ <br /> plenum,2 to 4 in.(5 to 10 cm)from the face of the filter,centered � <br /> between the tilter height dimension,and aimed down the length. <br /> The nozzle must be positioned 0-6 in.(0-15 cm)irom the end of t�e <br /> hood to ihe tip of the noule.S2B FIgUfB'I�. 30 FS(9.1 m) <br /> � � <br /> 2-41N. <br /> (5—10 cm) <br /> 2-41N. <br /> (5—10 cm� <br /> FIGUAE 13 <br /> �, <br /> � �. °°moo <br /> ,y.__4 FT{t.2 m)_�, <br /> MAXIMllM I <br /> 10 FT(3.1 m} <br /> MAXIMUM <br /> � <br /> INCOpAECT <br /> r <br /> '�. FIGUAE S4 <br /> ao�o, �m. <br /> FIGURE 11 <br />