Chamberlain 9902 - Manual (Page 20)

Installation Step 6
Hang the Opener
Two representative installations are shown. Yours
may be different. Hanging brackets should be angled,
Figure 1, to provide rigid support. On finished ceilings,
Figure 2, attach a sturdy metal bracket to structural
supports before installing the opener. The bracket and
fastening hardware are not supplied.
1. Measure the distance from each side of the opener to
the structural support.
2. Cut both pieces of the hanging bracket to required
lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with
5/16" - 18x1-7/8" lag screws.
5. Fasten the opener to the hanging brackets with
5/16" - 18x7/8" screws, lock washers and nuts.
6. Check to make sure the rail is centered over the door
(or in line with the header bracket if the bracket is not
centered above the door).
7. Remove the 2x4. Operate the door manually. If the
door hits the rail, raise the header bracket.
Measure
Distance
Lag Screws
5/16"-18x1-7/8"
Bracket
(Not Supplied)
Lag Screws
5/16"-18x1-7/8"
(Not Supplied)
5/16"-18x7/8" Screw
5/16" Lock Washer
5/16"-18 Nut
— FINISHED CEILING —
5/16"-18x7/8"
Hex Screws
5/16" Lock Washers
5/16"-18 Nuts
Hidden
Support
5/16"-18x7/8" Screw
5/16" Lock Washer
5/16"-18 Nut
Structural
Supports
CONTROL
CENTER
CONTROL
CENTER
Preferred Range of
Bracket Placement
Preferred Range of
Bracket Placement
20
The opener could fall and injure someone if it is not
properly secured. Fasten the opener securely to
structural supports of the garage.
Figure 1
Figure 2
Lag Screw
5/16"-18 x 1-7/8"
Hex Screw
5/16"- 18 x 7/8" Nut 5/16" - 18 Lock Washer 5/16"
Hardware Shown Actual Size
WARNING