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Chapter 3 — System Design <br /> Page 3 -3 <br /> REV. 2 <br /> Transition Ducts — The protection of non- standard ducts c. Multiple risers <br /> should be reviewed by the authority having jurisdiction. <br /> In cases of multiple rises, each riser is protected as an <br /> PYRO - CHEM KITCHEN KNIGHT II recommends that transi- <br /> tion ducts be protected as follows: Individual duct. See Figure 3-1e. <br /> a. Transition ducts — larger to smaller I DUCT <br /> In cases where the duct/plenum interface opening is <br /> larger than the final exhaust duct, measure the perime- <br /> ter /diameter of the duct halfway between the largest I 1 T <br /> and smallest section (or the average perimeter /diame- 1 r } DUCT <br /> ter). The nozzle is to be located within 0 -6 In. (15.2 cm) r' I 1 <br /> of the duct/plenum interface (not at the point where the 1006175PC <br /> measurement was taken), centered under the final <br /> exhaust duct opening. See Figure 3 -1c. PLENUM <br /> • Figure 3-le <br /> Electrostatic Precipitator — Ducts utilizing electrostatic <br /> precipitators must be protected above and below the unit. <br /> Standard duct nozzles are used in this application. See <br /> • Figure 3 -1f. <br /> III 2D NOZZLE <br /> PERIMETER - -+• - - - - <br /> MEASUREMENT 1/2 WAY INTO r <br /> TRANSITION -4- PRECIPITATOR <br /> AIL 006173PC <br /> \ PLENUM <br /> Figure 3 -1c. 2D NOZZLE , <br /> ri 006176PC C <br /> b. Transition ducts — smaller to larger ► <br /> Figure 3 -1f <br /> In cases where the duct/plenum interface opening is <br /> smaller than the final exhaust duct, measure the <br /> perimeter /diameter of the final exhaust duct. The 'Plenum Protection <br /> nozzle(s) is to be located within 0 -6 in. (15.2 cm) of the The Model 11-1 nozzle, Part No. 551029, is a one (1) flow <br /> duct/plenum interface, centered in the opening. See nozzle used for plenum protection. A single 1H nozzle can <br /> ► Figure 3 -1d. protect a plenum (with single or V -bank filters) 10 ft. (3.1 m) <br /> long by 4 ft. (1.2 m) wide. Dividing the length into sections <br /> PERIMETER - equal to or Tess than 10 ft. (3.1 m) in length and positioning <br /> MEASUREMENT - a nozzle at the start of each section can be done to protect <br /> \ / longer plenums. <br /> I 006174PC <br /> ► ` ` FigFigure 3 -1d <br /> ULEX 3830 <br /> PN551274(2) April 1, 2004 <br />