Planning - Chamberlain 3280CM 1/2 HP Owner's Manual

Planning

Identify the type and height of your garage door. Survey your garage area to see if any of the conditions below apply
to your installation. Additional materials may be required. You may fi nd it helpful to refer back to this page and the
accompanying illustrations as you proceed with the installation of your opener.
SECTIONAL DOOR INSTALLATION
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fi berglass, steel, aluminum, door with glass
panels, etc.). See page 19 for details.
Safety Reversing Sensor
ONE-PIECE DOOR WITHOUT TRACK
Header
Wall
Safety Reversing Sensor
Header Wall
Vertical
Centerline
of Door
Gap between fl oor and bottom of
door must not exceed 1/4" (6 mm)
Safety Reversing Sensor
Gap between fl oor and bottom of
door must not exceed 1/4" (6 mm)
FINISHED CEILING
Support bracket &
fastening hardware
is required. See
page 11.
Extension Spring
OR
Torsion Spring
Safety
Reversing
Sensor
FINISHED CEILING
Support bracket &
fastening hardware
is required. See
page 11.
Wall-mounted
Door Control
Access
Door
4
Wall-mounted
Door Control
Access
Door
ONE-PIECE DOOR WITH TRACK
Gap between fl oor and bottom of
Safety
door must not exceed 1/4" (6 mm)
Reversing
Sensor
Motor Unit
Motor Unit
Access
Door
Safety Reversing Sensor