FRIGIDAIRE FH30DD50MS - Manual (Page 7)

7
Plan the Ductwork
This downdraft blower system is designed for use with 3¼
x 10” ductwork (can be transitioned to 6” round).
For best performance, choose the ducting option which
allows the shortest length of ductwork and a minimum
number of elbows and transitions.
The system will operate most efficiently when the ductwork
does not exceed 60 feet of equivalent duct. The downdraft
will operate properly with ductwork up to 100 equivalent feet
of duct. See page 12 for Calculated Duct Length Table.
PLANNING
The blower can be mounted to the vent chassis housing to
provide exhaust discharge down, as supplied (Fig. 1), or
90° to the left (Fig. 2) or 90° to the right (Fig. 3). Position
the blower before installing the vent chassis housing in the
countertop.
Plan the Discharge
Fig. 1 - Discharge down (as supplied)
Fig. 2 - Discharge left
Fig. 3 - Discharge right
Slide Plate
Adjustment
Use the 2
outermost
screw holes
for the blower
slide plate.
Hex Head Screw
Inner
Hole
 NOTE
For left or right discharge, the blower housing needs to
be rotated for proper venting. See page 9 for instructions
on rotating the blower.
The blower is mounted on a slide plate which may be
adjusted 3½” (8.9cm) left or right to help avoid duct
interference with joists or other obstructions. To adjust the
slide plate, loosen the 2 hex head (¼” driver) screws and
move the slide plate to the desired position and tighten
the screws.
CAUTION
To reduce risk of fire and to properly exhaust air, be sure
to duct air outside – Do not vent exhaust air into spaces
within walls or ceilings or into attics, crawl spaces, or
garages.