Determine The Header Bracket Location - LiftMaster ATS2113X 1/2 HP Manuel D'installation

INSTALLATION STEP 1

Determine the Header Bracket Location

To prevent possible SERIOUS INJURY or DEATH:
• Header bracket MUST be RIGIDLY fastened to
structural support on header wall or ceiling,
otherwise door might NOT reverse when required.
DO NOT install header bracket over drywall.
• Concrete anchors MUST be used if mounting header
bracket or 2x4 into masonry.
• NEVER try to loosen, move or adjust door, springs,
cables, pulleys, brackets, or their hardware, ALL of
which are under EXTREME tension.
• ALWAYS call a trained door systems technician
if door binds, sticks, or is out of balance. An
unbalanced door might NOT reverse when required.
1. Close the door and mark the inside vertical centerline of the
door.
2. Extend the line onto the header wall above the door.
You can fasten the header bracket within 4 feet (1.22 m)
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 (see page 9) when clearance is
minimal. (It may be mounted on the wall upside down if
necessary, to gain approximately 1/2" (1.27 cm).)
If you need to install the header bracket on a 2x4 (on wall
or ceiling), use lag screws (not provided) to securely fasten
the 2x4 to structural supports as shown here and on
page 9.
3. Open your door to the highest point of travel as shown.
Draw an inter secting horizontal line on the header wall 2"
(5 cm) above the high point. This height will provide travel
clearance for the top edge of the door.
Proceed to Installation Step 2, page 9.
Unfi nished
Ceiling
Header Wall
SECTIONAL DOOR WITH CURVED TRACK
8
2x4
Vertical Centerline
of Door
2x4
Level
(Optional)
Ceiling
Header Wall
2" (5 cm)
Track
Highest
Point of
Travel
Door
OPTIONAL
CEILING
MOUNT
FOR
HEADER
BRACKET
Structural
Supports