Illustration Of Sectional Door Installation; Illustration Of One-Piece Door Installation - Chamberlain 1280 Owner's Manual

Before you begin, survey your garage area to see whether any of the conditions below apply to your installation.
SECTIONAL Door or ONE-PIECE Door
with Track Installation
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 20 for details.
Safety Reversing Sensor
ONE-PIECE Door Without Track Installation
Safety Reversing Sensor
You may find it helpful to refer back to this page as you proceed with the installation of your opener.
Header Wall
Door Center
Floor must be level
across width of door
Header
Wall
Gap between floor and bottom of
door must not exceed 1/4".
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 13.
Slack in belt tension
is normal when
garage door is closed.
Extension Spring
OR
One-Piece Door-Extension Spring
Torsion Spring
Door
Safety
Reversing
Sensor
Safety
Reversing
Sensor
4
OR
Header
Wall
Access Door
Track
Access Door