York DM 180 Technical Manual
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Contents
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262259-YTG-B-0107Unitary Products Group 351. The 2” space between the ducts allows for “jumping” anexisting roof joist.2. The 58-1/2” overall dimension of the ducts allows duct-work penetration between roof joists that are spaced on72” centers.NOTE: Ducts can be installed into the curb from the roof. Allelectrical and gas line connections can be madeinside the curb.FIGURE 10 -UNIT ROOF CURB DIMENSIONSSUPPLY AIR*BACK OF UNITRETURN AIR*DUCT SUPPORT RAILSMIN. ROOF OPENING:39-7/8" WIDE X 61-7/8" LongOUTDOOR COILEND OF UNIT4" 33-1/8"2"22-3/4"4"4"84"35-7/8" 14-1/4" (15 Ton)25-1/4" (20, 25 Ton)115-5/16" (15 Ton)126-1/4" (20, 25 Ton)2"*Supply and Return Air (including duct support rails)as shown, are typical for bottom duct applications.For location of horizontal duct applications(on back of unit), refer to Unit Dimension details.FRONTOFUNITDUCT SIZES:Supply Air = 22-1/2" x 35-5/8"Return Air = 32-7/8" x 35-5/8"FIGURE 11 -ROOF CURB DUCT OPENINGSDIMENSION |
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