Chamberlain 9950D - Manual (Page 19)

19
INSTALLATION STEP 6
Hang the Opener
Three 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. This
bracket and fastening hardware are not provided
(see accessories).
Existing brackets from a previous installation may be
fastened to the sides of the motor unit as in
Figures 1 and 2, or to the mounting tabs as shown in
Figure 3. Then continue with step 5 below.
1. Measure the distance from each side of the motor
unit 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" hex bolts, lock washers and nuts.
If you wish to utilize the two center mounting tabs,
you must triangulate the vertical brackets for
additional stability. See Figure 3.
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.
NOTE: DO NOT connect power to opener at this
time.
To avoid possible SERIOUS INJURY from a falling
garage door opener, fasten it SECURELY to structural
supports of the garage. Concrete anchors MUST be used
if installing any brackets into masonry.
Lag Screw 5/16"-18x1-7/8"
Hex Bolt
5/16"-18x7/8"
Nut 5/16"-18 Lock Washer 5/16"
HARDWARE SHOWN ACTUAL SIZE
Measure
Distance
Lag Screws
5/16"- 18x1-7/8"
Bracket
(Not Provided)
Lag Screws
5/16"-18x1-7/8"
(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
— FINISHED CEILING —
Hex Bolt
5/16"-18x7/8"
Lock Washers 5/16"
Nuts 5/16"-18
Hidden
Support
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Structural
Supports
Preferred range of
bracket placement
Preferred range of
bracket placement
Top Mounting Tabs
Utilizing existing installation
Existing Brackets
Bracket
(Provided)
Figure 1
Figure 2
Figure 3
WARNING
CAUTION WARNING
WARNING