42929-2-0721
Page 22
Empire Comfort Systems Inc. • Belleville, IL
29. 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 32.
TERMINATION BACK
PLATE OPENING
EDGE OF
BLOWER OUTLET
“A”
“B”
Figure 32
30. Add 1-1/4" to the dimension taken in step 20, then using
metal snips, cut both halves of the Air Duct to length.
See
Figure 33
, and discard the trimmed off ends.
“A” to ”B”
+ 1 1/4”
SEE FIGURE 16
MARK & CUT BOTH
HALVES OF THE
DUCT SECTIONS
DISCARD PORTION
NOT NEEDED
AIR DUCT SIZING
(CUT TO LENGTH)
Figure 33
31. Using # 10 X 1/2" long Hex Head screws, join the two
halves of the Air Duct together as shown in
Figure 34.
Figure 34
32. Install the cut end of the Air Duct over the Blower outlet.
See Figure 35.
33.
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 35.
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 35
14 1/2 X 141/2
EXTERIOR WALL
OPENING
TERMINATION BACK
PLATE OPENING
EDGE OF
BLOWER OUTLET
“A”
“B”
14-1/2" X 14-1/2"
EXTERIOR
WALL OPENING
EDGE OF
BLOWER
OUTLET
TERMINATION
BACK PLATE
OPENING
DISCARD
PORTION
NOT NEEDED
MARK & CUT BOTH
HALVES OF THE
DUCT SECTIONS
"A" TO "B"
+ 1-1/4"
SEE FIGURE 16
AIR DUCT SIZING
(CUT TO LENGTH)
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