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<br />Plenum Protection <br /> <br />The R-,02 system uses the 1W Nozzle (Part No. 419336) or the <br />.. 1100 Nozzle (Part No. 430192) or the 1N Nozzle (Part No. <br />419335) for plenum protection. The 1 W nozzle tip is stamped with <br />"1W and the 1N nozzle tip is stamped with 1N, indicating they are <br />lone-flow nozzles and must be counted as one flow number each. <br />When protecting a plenum chamber, the entire chamber must be <br />.. protected regardless of filter length. <br /> <br />.. VERTICAL PROTECTION - GENERAL <br /> <br />.. One 1W nozzle or 1100 nozzle will protect 4 linear feet (1.2 m) of <br />plenum. The maximum distance from the end of the hood to the <br />first and last nozzle must be no more than 2 ft. (.6 m). After the first <br />nozzle, any additional nozzles must be positioned at a maximum <br />of 4 ft. (1.2 m) apart down the entire length of the plenum. The <br />.. plenum width must not exceed 4 ft. (1.2 m). (The 1W or 1100 noz- <br />zle can be used on single or V-bank filter arrangements.) See <br />.. Figure 6. <br /> <br />.. <br /> <br /> <br />.. <br /> <br />FIGURE 6 <br />000197 <br /> <br />.. When protecting plenums with the 1W or 1100 nozzle, two options <br />of coverage are available: <br /> <br />.. Option 1: The 1100 or 1 W nozzle must be on the center line of the <br />single or 'V" bank filter and positioned within 1-20 in. <br />(2.5-51 cm) above the tDp edge of the filter. See <br />.. Figure 7. <br /> <br />SECTION IV - SYSTEM DESIGN <br />UL EX. 3470 ULC CEx747 Page 4-5 <br />10-1-02 REV. 3 <br /> <br /> <br />t <br />20 IN. (51 em) <br />MAXIMUM <br /> <br />t <br />20 IN. (51 em) <br />MAXIMUM <br /> <br />.. <br /> <br />FIGURE 7 <br />000'99 <br /> <br />.. <br /> <br />Option 2: The 1W or 1100 nozzle must be placed perpendicular, <br />8-12 in. (20-30 cm) from the face of the filter and angled <br />to the center of the filter. The nozzle tip must be within <br />2 in. (5 cm) from the perpendicular center line of the fil- <br />ter. See Figure 8. <br /> <br />.. <br /> <br /> <br />NOZZLE TIP <br />MUST BE WITHIN <br />THIS AREA <br /> <br />.. <br /> <br />FIGURE 8 <br />000200 <br /> <br />HORIZONTAL PROTECTION - OPTION 1 <br /> <br />.. 1N NOZZLE - PART NO. 419335 - SINGLE BANK PROTEC- <br />TION <br /> <br />One 1N nozzle will protect 10 linear feet (3.1 m) of single filter bank <br />.. plenum. The nozzle(s) must be mounted in the plenum, 2 to 4 in. <br />(5 to 10 em) from the face of the filter, centered between the filter <br />height dimension, and aimed down the length. See Figure 9. <br /> <br />~ <br />10 FT. (3.1 m) <br />MAXIMUM <br />~ <br /> <br />.. <br /> <br /> <br />00020' <br /> <br />FIGURE 9 <br />