Broan BCDJ1 - Ducted Installation Specifics; Knockout Plate Selection and Removal; Damper Assembly and Duct Plate Attachment

INSTALLATION MANUAL INSTALLATION
12
DUCTED INSTALLATION ONLY
TIP: Insert a small length of duct over the 3¼” x 10” damper assembly (for rectangular ducting) or
7” round (for round ducting) and seal the joint using aluminum foil duct tape to ease connection
with the house ductwork.
8 ] Remove 3¼” x 10” vertical or 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 FIGURES 1 A and 1 B).
NOTE: To accommodate off-center ductwork, the 7” round duct plate can be installed up
to 1/2” on either side of the hood center.
7” ROUND KNOCKOUT
PLATE (ALSO REMOVE
3¼” X 10” VERTICAL
KNOCKOUT PLATE)
3¼” X 10”
VERTICAL
KNOCKOUT
PLATE
3¼” X 10”
HORIZONTAL
KNOCKOUT
PLATE
FIGURE 1 A
7” ROUND
DUCT
PLATE
SCREWS
FIGURE 3
3¼” X 10”
DAMPER
ASSEMBLY
TOP/BACK
EDGE OF
HOOD
DAMPER
FLAP
PIVOT
SCREWS
FIGURE 2 A FIGURE 2 B
9 ] Attach 3¼” x 10” Damper Assembly on top OR back of hood (if using 3¼” x 10” duct; shaded
part in FIGURE 2 A below) or 7” Round Duct Plate (if using 7-inch round duct, FIGURE 3) over
the knockout opening. When installed, the 3¼” x 10” damper assembly must open as
shown in FIGURE 2 B.
FIGURE 1 B
3¼” X 10”
DAMPER
ASSEMBLY
BACK OF
HOOD
DAMPER
FLAP
PIVOT
SCREWS