Planning - Chamberlain 3245 1/3 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
SECTIONAL DOOR INSTALLATION
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum,
door with glass panels, etc.).
See page 19 for details.
Safety Reversing Sensor
ONE-PIECE DOOR WITHOUT TRACK
Safety
Reversing Sensor
Header Wall
Vertical Centerline
of Garage Door
Gap between floor and bottom of door
must not exceed 1/4" (6 mm).
Header
Wall
Wall-
mounted
Door
Control
Safety
Reversing Sensor
Gap between floor and bottom of
door must not exceed 1/4" (6 mm).
required. You may find it helpful to refer back to this page
and the accompanying illustrations as you proceed with
the installation of your opener.
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 12.
Slack in chain tension
is normal when
garage door is closed.
Extension Spring
OR
Torsion Spring
Safety
Reversing
Sensor
ONE-PIECE DOOR WITH TRACK
Access
Door
Safety
Reversing Sensor
4
Motor Unit
Wall-
mounted
Door
Control
Access Door
Motor Unit
Safety
Gap between floor
Reversing Sensor
and bottom of door
must not exceed 1/4" (6 mm).
Access
Door