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• i SECTION IV - SYSTEM DESIGN � UL EX3470 ULC EX3470 Page 4-2 REV.4 4-1-06 Duct Protection-Multiple Noule DUCT SIZES UP TO 135 IN.(343 cm)PERIMETER-3 FLOW OPTION ► • One 1 W Nozzle (Part No. 419336) and one 2W Noule (Part No.419337)=three flow numbers • 135 in.(343 cm)perimeter maximum • No round duct option available • Follow design table in Figure 2 to determine maximum module size for each nozzle � 1 W Module 2W Module Side A Side B Side B Side B Maximum Maximum Maximum Maximum in. (cm) in. (cm) in. (cm) in. (cm) 4 (10) 60.0 (152) 23.0 (58) 37.0 (94) 5 (13) 60.0 (152) 23.0 (58) 37.0 (94) 6 (15) 59.5 (151) 22.5 (57) 37.0 (94) � 7 (18) 59.0 (150) 22.0 (56) 37.0 (94) 8 (20) 58.5 (149) 22.0 (56) 36.5 (93) 9 (23) 58.0 (147) 21.5 (55) 36.5 (93) 10 (25) 57.0 (145) 21.0 (53) 36.0 (91) 11 (28) 56.0 (142) 20.5 (52) 35.5 (90) 12 (31) 55.5 (141) 20.0 (51) 35.5 (90) 13 (33) 54.5 (138) 19.5 (50) 35.0 (89) 14 (36) 53.5 (136) 18.5 (47) 35.0 (89) 15 (38) 52.0 (132) 18.0 (46) 34.0 (86) 16 (41) 51.0 (130) 17.0 (43) 34.0 (86) 17 (43) 49.5 (126) 16.0 (41) 33.5 (85) 18 (46) 47.5 (121) 14.5 (37) 33.0 (84) 19 (48) 46.0 (117) 13.5 (34) 32.5 (83) 20 (51) 43.5 (111) 12.0 (31) 31.7 (81) 21 (53) 41.0 (104) 10.0 (25) 31.0 (79) 22 (56) 38.0 (97) 7.5 (19) 30.5 (78) 23 (58) 33.5 (85) 4.0 (10) 29.5 (75) �- Side B 1 � Side A 1 W • 1 2"' FIGURE 2 ��, Example:Protection is required for a duct that has an"A"dimen- sion of S.0 in.(20 cm)wide and a"8"dimension of 55 in.(140 cm) long. Referring to the table in Figure 2,if the"A"dimension is 8.0 in.(20 pm),the"B"dimension must not exceed 58.5 in.(149 cm).In this example,the"B"dimension is 55 in.(140 cm),therefore,this duct can be protected with a three flow application. ►Read over from the 8.0 in. (20 cm) line on the table to the 1 W Module column.At that point,the chart shows that the"B"module ►length for the 1 W nozzle can be 22.0 in.(56 cm).Center the 1 W noule in that module.The 2W module can now be centered with- in the remaining module.