Chamberlain 120ad Garage Door Opener User Manual


 
22
Carriage Bolt 8mm x 65mm
Nut 8mm
Lock Washer 8mm
Sheet Metal Screw
HARDWARE SHOWN ACTUAL SIZE
114A2845
Header Wall
Vertical
Centreline of
Garage Door
Finished Ceiling
Optional
Placement
of Door
Bracket
Header
Bracket
Door
Bracket
2x4 Support
For a door with no exposed framing,
or for the optional installation, use
lag screws 5/16"x1-1/2" (Not Provided)
to fasten door bracket.
METAL DOOR
Top of Door
(Inside
Garage)
Door
Bracket
Optional
Placement
Top
Edge
of Door
Self-Threading
Screw
1/4"-14x5/8"
Door
Bracket
Top of Door
(Inside
Garage)
Carriage Bolt
5/16"x2"
(Not Provided)
Optional
Placement
Lock
Washer
5/16"
Nut
5/16"-18
Top Edge
of Door
WOOD DOOR
HORIZONTAL AND VERTICAL
REINFORCEMENT IS NEEDED
FOR LIGHTWEIGHT GARAGE
DOORS (FIBREGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
(NOT PROVIDED)
ONE-PIECE DOORS
Please read and comply with the warnings and
reinforcement instructions on the previous page.
They apply to one-piece doors also.
Centre the door bracket on the top of the door, in
line with the header bracket as shown. Mark either
the left and right, or the top and bottom holes.
Metal Doors: Drill 4.5mm (3/16") pilot holes and
fasten the bracket with the 8 x 13mm (1/4"-
14x5/8") self-threading screws provided.
Wood Doors: Drill 8mm (5/16") holes and use
8mm x 2" (5/16"x2") carriage bolts, lock washers
and nuts or 8 x 40mm (5/16"x1-1/2") lag screws
depending on your installation needs.
NOTE: The door bracket may be installed on the top
edge of the door if required for your installation.
(Refer to the dotted line optional placement drawing.)