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12
TIP: Insert a small length of duct over the 3¼" x 10" damper assembly (for rectangular ducting) or
10 ] Remove 3¼" x 10" vertical, 3¼" x 10" horizontal (both are the rectangular central
knockout plates, see hatched areas) or 7-inch round knockout plate as appropriate for
your ducting method (see F
F
1 A
IGURE
7" ROUND KNOCKOUT
PLATE (
ALSO REMOVE
3¼"
10"
X
VERTICAL
)
KNOCKOUT PLATE
3¼"
10"
X
VERTICAL
KNOCKOUT
PLATE
11 ] Using the screws located on top of the
2), attach the 3¼" x 10"
hood (F
IGURE
Damper Assembly on top OR back of hood
(if using 3¼" x 10" duct; shaded part in
F
3 A below) or 7" Round Duct Plate
IGURE
(if using 7-inch round duct, F
the knockout opening. When installed, the
3¼" x 10" damper assembly must open as
shown in F
3 B.
IGURE
F
3 A
IGURE
SCREWS
3¼"
10"
X
DAMPER
ASSEMBLY
SCREWS
3¼"
10"
X
DAMPER
ASSEMBLY
F
4
IGURE
7" round (for round ducting) and seal the joint using aluminum foil duct tape to ease connection
with the house ductwork.
DUCTED INSTALLATION ONLY
1 A and 1 B).
IGURES
3¼"
10"
X
HORIZONTAL
KNOCKOUT
PLATE
4) over
IGURE
NOTE: To accommodate off-center
F
1 B
IGURE
F
2
IGURE
SCREWS
F
3 B
IGURE
TOP/BACK
EDGE OF
HOOD
BACK OF
HOOD
ductwork, the 7" round duct plate
can be installed up to 1/2" on
either side of the hood center.
DAMPER
FLAP
PIVOT
DAMPER
FLAP
PIVOT
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