Installation Section: Pages; Determine The Header Bracket Location; Sectional Door - Chamberlain Security+ 4640 Owner's Manual

Installation Step 1
Determine Header Bracket Location
Installation procedures vary according to garage
door types. Follow the instructions which apply to
your door.
Header
Wall
Ceiling
Header
Wall
3"
Highest Point
of Travel
Door

Sectional door

with curved track
Installation Section: Pages 12 – 27
Finished
Vertical
Ceiling
Guideline
2x4
Vertical
Guideline
Track
Door
One-piece door
with horizontal track
If the header bracket is not rigidly fastened to a
structural support on the header wall or ceiling, the
safety reverse system may not work properly (see
page 30). The door might not reverse when required, and
could cause serious injury or death.
The garage door springs, cables, pulleys, brackets and
their hardware are under extreme tension. Do not attempt
to loosen, move or adjust them yourself. Serious
personal injury or death could result. Call for
professional garage door service.
Structural
Supports
ONE PIECE Door with Track
• Close the door and mark the inside
vertical centerline of the garage door.
• Extend the line onto the header wall
above the door.
Remember, you can fasten the header
bracket within 4 feet of the left or right
of the door center only if a torsion
spring or center bearing plate is in the
way; or you can attach it to the ceiling
(refer to page 14) when clearance is
minimal. (It may be mounted on the
wall upside down if necessary, to gain
approximately 1/2".)
If you need to install the header bracket on
a 2x4 (on wall or ceiling), use lag screws
(not supplied) to securely fasten the 2x4 to
structural supports as shown here and on
page 13.
• Open your door to the highest point of
travel as shown. Draw an intersecting
Header
horizontal line on the header wall 3"
Wall
Track
3"
above the high point. This height will
provide travel clearance for the top edge
of the door.
Highest Point
of Travel
Proceed to Step 2, page 14.
12
WARNING
SECTIONAL Door or