Hang The Opener - Chamberlain 1280-298LMC - 1/2 HP Owner's Manual

Installation Step 5

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.
• Measure the distance from each side of the opener
to the structural support.
• Cut both pieces of the hanging bracket to required
lengths.
• Drill 3/16" pilot holes in the structural supports.
• Attach one end of each bracket to a support with
5/16"-18x1-7/8" lag screws.
• Fasten the opener to the hanging brackets with
5/16"-18x7/8" hex screws, lock washers and nuts.
• Check to make sure the T-rail is centered over the
door (or in line with the header bracket if the
bracket is not centered above the door).
• Remove the 2x4. Operate the door manually. If the
door hits the rail, raise the header bracket.
Grease the top and underside
of the rail surface where
the trolley slides with
rail grease.
Hardware Shown Actual Size
Lag Screw
5/16"-18x1-7/8"
Hex Screw
5/16"-18x7/8" Nut 5/16"-18
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
5/16"-18x7/8"
Hex Screws
5/16" Lock Washers
5/16"-18 Nuts
Figure 2
(Not Supplied)
5/16"-18x7/8" Screw
5/16" Lock Washer
Lock Washer 5/16"
13
WARNING
Measure
Distance
— FINISHED CEILING —
Bracket
Lag Screws
5/16"-18x1-7/8"
5/16"-18 Nut
Structural
Supports
Lag Screws
5/16"-18x1-7/8"
Hidden
Support
(Not Supplied)
5/16"-18x7/8" Screw
5/16" Lock Washer
5/16"-18 Nut