Chamberlain 349544 Garage Door Opener User Manual


 
12
1 Determine the header bracket
location
To preventpossible SERIOUS INJURY or
DEATH:
Header bracketMUSTbe RIGIDLY
fastened to structural supporton header
wall or ceiling,otherwise garage door might
NOTreverse when required.DO NOT
install header bracketover drywall.
Concrete anchorsMUSTbe used if
mounting header bracketor 2x4 into
masonry.
NEVER tryto loosen,move or adjust
garage door,springs,cables,pulleys,
brackets, or their hardware, ALL ofwhich
are under EXTREME tension.
ALWAYS call a trained door systems
technician ifgarage door binds,sticks,or is
out of balance.An unbalanced garage
door might NOTreverse when required.
Installation
Installation proceduresvaryaccording to garage door types.Followthe instructionswhich applyto your
door.
1.1 Close the door and markthe inside vertical centerline ofthe garage door.
1.2 Extend the line onto the header wall above the door.
Youcan fasten the headerbracket within 4feet (1.22 m) of the left orright of the door
centeronly if atorsionspringor centerbearingplate is in the way; oryou canattachit to
the ceilingwhenclearance is minimal.(It may be mountedonthe wall upside downif
necessary,togain approximately 1/2" (1 cm).
Ifyou need to install the header bracketon a 2x4 (on wall or ceiling),use lag screws(not
provided) to securely fasten the 2x4 to structural supports.
1.3 Open your door to the highestpointoftravel asshown.Drawan intersecting horizontal line on
the header wall 2"(5 cm) above the high point.
2" (5 cm) above the high pointfor sectional door and one-piece door with track.
8" (20 cm)above the high pointfor one-piece door withouttrack.This heightwill provide travel
clearance for the top edge ofthe door.NOTE:Ifthe total number ofinches exceedsthe height
available in your garage,use the maximumheightpossible, orrefer to page 13 for ceiling
installation.
Sectional door with
curved track
Header Wall
Track
2" (5 cm)
Highest Point
of Travel
Door
One-piece door with
horizontal track
Header Wall
Track
2" (5 cm)
Highest Point
of Travel
Door
One-piece door without track:
jamb hardware
Header Wall
8" (20 cm)
Highest
Point of
Travel
Door
Jamb
Hardware
Header Wall
Unfinished
Ceiling
Vertical Centerline
of Garage Door
2x4
2x4
Structural
Supports
Level
(Optional)
OPTIONAL
CEILING
MOUNT FOR
HEADER
BRACKET
One-piece door without track:
pivot hardware
Header Wall
8" (20 cm)
Highest
Point of
Travel
Door
Pivot