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3
PLANNING
Identify the type and height of your garage door. If you
have a one-piece door, follow the assembly
instructions contained in this manual and refer to the
Installation Instructions One-Piece Door for
installation procedures. 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.
Depending on your requirements, there are several
installation steps which may call for materials or hardware
not included in the carton.
• Installation Page 10 – Look at the wall or ceiling above
the garage door. The header bracket must be securely
fastened to structural supports.
• Installation Page 12 – Do you have a finished ceiling in
your garage? If so, a support bracket and additional
fastening hardware may be required.
• Installation Page 13 – Do you have a steel, aluminum,
fiberglass or glass panel door? If so, horizontal and
vertical reinforcement is required.
• Installation Page 18 – Depending upon garage
construction, extension brackets or wood blocks may be
needed to install sensors.
• Installation Page 18 – Alternate floor mounting of the
safety reversing sensor will require hardware not
provided.
• Do you have an access door in addition to the garage
door? If not, Model 7702CB Outside Quick Release is
required. See Accessories page.
• Look at the garage door where it meets the floor. Any
gap between the floor and the bottom of the door must
not exceed 1/4" (6 mm). Otherwise, the safety reversal
system may not work properly. See Adjustment Step 3.
Floor or door should be repaired.
• The opener should be installed above the center of the
door. If there is a torsion spring or center bearing plate
in the way of the header bracket, it may be installed
within 4 feet (1.22 m) to the left or right of the door
center.
• If your door is more than 7 feet (2.13 m) high, see rail
extension kits listed on Accessories page 32.
Without a properly working safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
• The gap between the bottom of the garage door and the floor
MUST NOT exceed 1/4" (6 mm). Otherwise, the safety
reversal system may not work properly.
• The floor or the garage door MUST be repaired to eliminate
the gap.
WARNING
CAUTION
WARNING
WARNING
Safety Reversing
Sensor
Header Wall
Access
Door
Safety
Reversing
Sensor
Gap between floor
and bottom of door
must not exceed 1/4"
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.) See page 13 for details.
Support bracket &
fastening hardware
is required.
See page 12.
FINISHED CEILING
Rail
Wall-mounted
Door Control
Torsion Spring
Slack in chain tension
is normal when
garage door is closed.
Center of
Garage door
COMPLETED INSTALLATION
Trolley
Header
Wall
Garage
Door
Header
Bracket
Straight
Door
Arm
Emergency
Release
Rope & Handle
Door
Bracket
Curved
Door
Arm
Garage
Door
Spring
Chain
Trolley
Stop Bolt
CLOSED POSITION