Illustration Of Sectional Door Installation - Chamberlain Security+ 4620 Owner's Manual

Before you begin, survey your garage area to see whether any of the conditions below apply to your installation.
You may find it helpful to refer back to this page as you proceed with the installation of your opener.
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 24 for details.
Safety Reversing Sensor
Based on your particular requirements, there are several
installation steps which might call for materials and/or
hardware not included in the carton.
• Step 1, page 12 – Look at the wall or ceiling above the
garage door. The header bracket must be securely
fastened to structural supports.
• Safety reversing sensor, page 16 – Depending upon
garage construction, extension brackets or wood blocks
may be needed to be fasten sensors to mounting locations.
• Step 4, page 17 – Floor mounting of the safety reversing
sensor will require hardware not provided.
• Step 6, page 20 – Do you have a finished ceiling in your
garage? If so, a support bracket and additional fastening
hardware may be required.
• Step 12, page 24 – Do you have a steel, aluminum,
fiberglass or glass panel door? If so, horizontal and
vertical reinforcement is required.
• Look at the garage door where it meets the floor. It must
close on the floor all the way across. Otherwise, the
safety reverse system may not work properly. See
page 30. Floor or door should be repaired.
SECTIONAL Door Installation
Header Wall
Door Center
Floor must be level
across width of door
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 20.
Extension Spring
OR
Torsion Spring
Access Door
Safety
Reversing
Sensor
Closed Position
Header
Bracket Rail
Bracket
Garage
Door
Spring
Straight
Door
Arm
Header
Wall
Door
Bracket
Garage
Door
• The opener can be installed within 4 feet of the left or
right of the door center if there is a torsion spring or
center bearing plate in the way of the header bracket or
door bracket area. If your door has extension springs,
the opener must be installed in the center of the door.
See pages 12 and 24.
• Do you have an access door in addition to the garage
door? If not, Model 7702CB Outside Quick Release is
required. See page 38.
• If your door is more than 7 feet high, see the rail
extension kits listed on page 38.
6
Rail Assembly
Trolley
Manual
Release
Rope & Handle
Curved
Door
Arm