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20. Locate the two halves of the Air Duct. To determine the
length needed for this duct, take a measurement from
the blower housing outlet to the inner flange on the Outer
Termination Frame. See Figure 16.
TERMINATION
TERMINATION BACK
PLATE OPENING
BACK PLATE
OPENING
"A"
"A"
21. Add 1 ¼" to the dimension taken in step 20, then using
metal snips, cut both halves of the Air Duct to length. See
Figure 17, and discard the trimmed off ends.
42724-0-1120
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14 1/2 X 141/2
14 ½" X 14 ½"
EXTERIOR WALL
EXTERIOR
OPENING
WALL OPENING
"B"
"B"
EDGE OF
BLOWER
BLOWER OUTLET
OUTLET
Figure 16
DISCARD
DISCARD PORTION
PORTION
NOT NEEDED
NOT NEEDED
MARK & CUT BOTH
MARK & CUT BOTH
HALVES OF THE
HALVES OF THE
DUCT SECTIONS
DUCT SECTIONS
AIR DUCT SIZING
"A" TO "B"
(CUT TO LENGTH)
"A" to "B"
AIR DUCT SIZING
+ 1 1/4"
(CUT TO LENGTH)
+ 1 ¼"
SEE FIGURE 16
SEE FIGURE 16
Figure 17
Empire Comfort Systems Inc. • Belleville, IL
22. Using # 10 X ½" long Hex Head screws, join the two
halves of the Air Duct together as shown in Figure 18.
EDGE OF
EDGE OF
BLOWER OUTLET
23. Install the cut end of the Air Duct over the Blower outlet.
See Figure 19.
24. Check to see if the flanges of the Air Duct are flush with
the bottom inside flange of the Outer Termination as
shown by Figure 19. If too long, trim additional metal
from the back edges of the Air Duct to fit.
ONCE THE AIR DUCT IS SLIPPED OVER THE BLOWER OUTLET,
THE FLANGES OF THE DUCT MUST BE FLUSH WITH THE
INNER FLANGES OF THE OUTER TERMINATION ASSEMBLY
Figure 18
ONCE THE AIR DUCT IS SLIPPED OVER THE BLOWER OUTLET,
THE FLANGES OF THE DUCT MUST BE FLUSH WITH THE
INNER FLANGES OF THE OUTER TERMINATION ASSEMBLY
Figure 19
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