Chamberlain 2220RGD 1/2 HP - Manual (Page 4)

Safety
Reversing Sensor
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.). See page 19 for details.
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 15.
— — — — — — — —
Header Wall
Safety
Reversing Sensor
Extension Spring
OR Torsion Spring
Motor unit
Wall-mounted
Door Control
Rail
Access Door
Gap between floor and bottom of
door must not exceed 1/4" (6 mm).
Vertical
Centerline
of Garage Door
4
SECTIONAL DOOR INSTALLATION
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 find it helpful to refer back to this page
and the accompanying illustrations as you proceed with the installation of your opener.
Safety
Reversing Sensor
FINISHED CEILING
Support bracket &
fastening hardware
is required. See page 15.
Safety Reversing
Sensor
Header Wall
Access Door
Gap between floor and bottom of
door must not exceed 1/4" (6 mm).
Motor unit
Wall-mounted
Door Control
Rail
ONE-PIECE DOOR WITHOUT TRACK
Access
Door
Safety
Reversing Sensor
Safety
Reversing Sensor
Gap between floor and bottom of
door must not exceed 1/4" (6 mm).
ONE-PIECE DOOR WITH TRACK