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Chamberlain 3220C 1/2 HP Manual Do Utilizador

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Header Wall
Vertical
Centerline 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 (FIBERGLASS, 
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.
• Center 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 3/16" pilot holes and fasten the
bracket with the 1/4"-14x5/8" self-threading screws
provided.
• Wood Doors: Drill 5/16" holes and use 5/16"x2"
carriage bolts, lock washers and nuts (not
provided) or 5/16"x1-1/2" lag screws (not provided)
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.)
Self-Threading Screw
1/4"-14x5/8"
HARDWARE SHOWN 
ACTUAL SIZE