York DM 300 User Manual download pdf (Page 35)

262259-YTG-E-1008

Johnson Controls Unitary Products 35

1. The 2” space between the ducts allows for “jumping” an

existing roof joist.

2. The 58-1/2” overall dimension of the ducts allows duct-

work penetration between roof joists that are spaced on

72” centers.

NOTE: Ducts can be installed into the curb from the roof. All

electrical and gas line connections can be made

inside the curb.

FIGURE 10 -UNIT ROOF CURB DIMENSIONS

SUPPLY AIR*

BACK OF UNIT

RETURN AIR*

DUCT SUPPORT RAILS

MIN. ROOF OPENING:

39-7/8" WIDE X 61-7/8" Long

OUTDOOR COIL

END OF UNIT

33-1/8"

22-3/4"

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)

*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.

FRONT

UNIT

DUCT SIZES:

Supply Air = 22-1/2" x 35-5/8"

Return Air = 32-7/8" x 35-5/8"

FIGURE 11 -ROOF CURB DUCT OPENINGS

DIMENSION

1 2 ... 30 31 32 33 34 35 36 37 38 39 40

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York DM 300 User Manual Page 35