Determine The Headerbracketlocation - Chamberlain Whisper Drive Security+ 248739 Owner's Manual

INSTALLATION"'"'S'T'E'P'"'I'"'
Determine the HeaderBracketLocation
To prevent possibie SERIOUSiNJURY or DEATH:
• Header bracket MUST be RIGIDLY fastened to
structural support on header wall or ceiling,
othe_ise garage door might NOT reverse when
required. DO NOT inslafl header bracket over
drywall.
• Concrete anchors MUST be used if mounting
header bracket or 2x4 into masonry.
o NEVERtry to Ioosen, move or adjust garage
door, springs, cables, pulleys, brackets, or their
hardware, ALL of which are under EXTREME
tension.
• ALWAYS call a trained door systems technician if
garage door binds, sticks, or is out of batance.An
unbalanced garage door might NOT reverse when
required.
Header Wall
Unfinished _ OPTIONAL
Ceiling _J FoRMOuNTCEILING
HEADER
BRACKET
VerticalCenterline
of Garage Door
2x4 Structural
Supports
installation procedures vary according to garage door
types. Follow the instructions which apply to your door.
t. Close the door and mark the inside vertical center[ine of
the garage door.
2. Extend the line onto the header wail above the door.
Yon can fasten the header bracketwithin
4 feet (1.22 m) of the left or right of the door center
only if a torsion springor center bearing plate is in
the way; or youcan attach it to the ceiling
(see page 13) when clearance is minimal. (It may
be mountedon the wall upside down if necessary, to
gain approximately1/2" (1 cm).)
tf you need to instali tile header bracket on a 2x4
(on wall or ceiling), use lag screws (not provided)
to securety fasten the 2x4 to structural supports as
shown here and on page 13.
3. Open your door to the highest poinl of travel as shown.
Draw an intersecting horizontal line m] the header wall
above the high point:
• 2" (5 cm) above the high point for sectional door
and one-piece door with track.
* 8" (20 cm) above file high point for one-piece door
without track.
This height will provide travel clearance for the top edge
of the door.
NOTE: If the total number of inches exceeds the height
available in your garage, use the maximum height
possible, or refer to page 13 for ceiling installation.
Header W all
/
i _2°(5cm)
Highest
Point
ol Travel
- Door
Sectional door with
curvedtrack
Header W ail
/
/]'
Track
_ Highest
Paint
of Trave_
One-piecedoorwith
horizontal track
Header W alt Header W ail
Dog,AFt" :, Poi.t
.y% !i°f rav ,
II I H;ghest"-'-'--------------
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One_piece doorwithout t rack: [ One-piece door without t rack;
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