Chamberlain 1270LMC Garage Door Opener User Manual


 
9
Header Wall
Vertical
Centerline
Vertical
Centerline of
Garage Door
2x4
Unfinished
Ceiling
Structural
Supports
2x4
OPTIONAL CEILING MOUNT
• Close the door and mark the
inside vertical centerline of
your garage door. Extend the
line onto the header wall
above door.
If headroom clearance is
minimal, you can install the
header bracket on the ceiling.
See page 10.
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.
EXAMPLE
Distance from top of door
(at highest point of travel) to floor...........................92"
Actual height of door .............................................-88"
Remainder................................................................4"
Add.........................................................................+8"
Bracket height on header wall..............................=12"
(Measure UP from top of CLOSED door.)
Proceed to Step 2, page 10.
Header Wall
Highest Point
of Travel
Door
Distance
Jamb
Hardware
Door
Highest Point
of Travel
Header
Wall
Pivot
Distance
ONE-PIECE Door Without Track
• Open your door to the highest point of travel as
shown. Measure the distance from the top of the
door to the floor. Subtract the actual height of the
door. Add 8" to the remainder. (See Example).
• Close the door and draw an intersecting horizontal
line on the header wall at the determined height.
If the total number of inches exceeds the height
available in your garage, use the maximum
height possible, or refer to page 10 for ceiling
installation.
One-piece door without track
jamb hardware
One-piece door without track
pivot hardware
Read the Safety Instructions on page 8. They also apply to doors without tracks.