08-8166 - Laserfiche WebLink

Browse Search

SECTION IV - SYSTEM DESIGN UL EX. 3470. ULC CEx747 Page 4-6 REV. 4 10-1-02 Plenum Protection (Continued) .. HORIZONTAL PROTECTION - OPTION 2 1100 NOZZLE - PART NO. 430912 - "V" BANK PROTECTION 1W NOZZLE - PART NO. 419336 One 1100 or 1 W nozzle will protect 6 linear feet (1.8 m) of ''V" bank plenum. The nozzle must be mounted horizontally, positioned 1/3 the filter height down from the top of the filter. Nozzles can be locat- ed at 6 ft. (1.8 m) spacings on longer plenums. See Figure 10. 1100 NOZ2LE OR lW NOZ2LE 113 !H) t HEIGHT OF FILTER (H) + I_4FT. i -I (1.2m) MAXIMUM ~ FIGURE 10 0011524 1N NOZZLE - PART NO. 419335 -.Y' BANK PROTECTION Two IN nozzles will protect 10 linear feet (3.1 m) by 4 ft. (1.2 m) wide of .V" bank plenum. The nozzles must be mounted in the plenum, 2 to 4 in. (5 to 10 cm) from the face of the filter, centered between the filter height dimension, and aimed down the length. See Figure 11. / 000203 I_4FT. (1.2m)__1 MAXIMUM .. FIGURE 11 For a plenum, either single or "V" bank, with a linear extension longer than 10 feet (3.1 m), each bank may be protected using one 1N nozzle every 10 ft. (3.1 m) or less depending on the overall length of the plenum. See Figure 12. The nozzles may point in the opposite directions as long as the entire plenum area is protected, and the 10 ft. (3.1 m) limitation is not exceeded. See Figure 13. The nozzle positioning shown in Figure 14 is not an acceptable method of protection because the plenum area directly under the tee is not within the discharge pattern of either nozzle. 10 FT. (3.1 m)/ MAXIMUM FIGURE 12 000200 10 FT. (3.1 m)/ MAXIMUM FIGURE 13 000207 FIGURE 14 000208