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. ' 'I <br /> I <br /> SECTION IV — SYSTEM DESIGN <br /> UL EX3470 ULC EX3470 Page 4-3 <br /> 7-1-09 REV.5 <br /> Duct Protection—Multiple Noule(Continued) When working with Chart 2, one half of the quantity of nozzles <br /> determined must be equally positioned in the top half of the area <br /> ► DUCT SIZES GREATER THAN 100 IN.(254 cm)PERIMETER of the duct and the remaining half of the nozzles must be posi- <br /> tioned in the bottom half of the duct area. <br /> ► • Ducts over 100 in.(254 cm)perimeter may be modularized using �ample: The duct to be protected has a Side "A" of 40 in. <br /> 2W nozzles(Part No.419337) ► (101.6 cm) and a Side"B" of 60 in. (152.4 cm). Referring to the <br /> • No round duct optio�available design chart, this duct requires 4 nozzles. One half of 4 = 2. <br /> • Follow the design chart to determine maximum module size for Therefore,2 nozzles must be equally positioned in each of the iwo <br /> each 2W nozzle duct areas.See Figure 3. <br /> • When determining number of nozzles required,it is sometimes SIDE°e^ <br /> an advantage to check the chart using the shortest side as Side � 30 IN.(7B cm) 30 IN.(78 cm) <br /> "A"and then recheck it using the longest side as Side"A".This <br /> comparison may reveal a need for a lesser quanUty of nozzles zo iN. � I � <br /> one way versus the other way. (si cm� <br /> When working with Chart 1, the quantity of nozzles determined 61DE ____ ( i_ _ _ 40 IN. <br /> must be equally divided within the duct area. A�� (102°"'� <br /> 2o iN. � � � <br /> (51 cm) I <br /> CHART NO.1 � � (bz�cm) �I <br /> e <br /> FIGURE 3 <br /> A • • • In. 5 <br /> � SIDE"8"cm <br /> 25 26 27 28 29 70 91 92 33 71 95 9g 97 3B lg qp q� d�43 44 45 IB 47 IB 49 W 51 52 53 Sq 55 58 Sl SE 59 80 B1 62 89 84 65 88 8T BB 89 TO 71 72 hG <br /> 61 66 69 it 74 76 79 81 81 E6 B9 B1 D4 81 BB 1021M 1W 109 fl2 114 N7 11817!1Y4 1271JD 172 1J6 13T 1�0 42 7�5 117 15D 152 155 151 160 1&11�i6B 170 ifl 17517E 1A0 1L9 cm <br /> 4 <br /> 5 10 <br /> 6 11 <br /> 7 15 <br /> B 18 <br /> 9 20 <br /> 10 23 <br /> „ 1 zs <br /> ,z za <br /> 13 30 <br /> 74 37 <br /> 75 36 <br /> 16 �B <br /> 17 2 11 <br /> SIDE �g 41 SIDE <br /> �A�• 19 46 "A" <br /> in. 2D 48 cm <br /> 27 51 <br /> 22 57 <br /> 23 58 <br /> 24 5g <br /> 25 81 <br /> 26 gq <br /> 21 � 66 <br /> 28 89 <br /> 29 71 <br /> 30 �q <br /> 31 76 <br /> 32 7g <br /> 33 A E1 <br /> � `'f ea <br /> 35 C� Bg <br /> 36 5 v 6 89 <br /> 6 7 g� <br /> CHART NO.2 <br /> e <br /> • • • <br /> A �—�—: <br /> NOTE:NOZZLE QUANTITIES LISTED IN CHART 2 MUST BE E�UALLY DIVIDED INTO EACH OF THE TWO DUCT MODULES. <br /> 36 <br /> 31 91 <br /> 38 g� <br /> 39 97 <br /> 40 9g <br /> <, 2 4 ,� <br /> <2 704 <br /> ,� 6 ,o, <br /> �, ,� <br /> 45 714 <br /> 46 114 <br /> <7 117 <br /> � �8 119 <br /> 122 <br /> 008522 <br />