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Determine the header bracket location, Installation step 1 – Chamberlain WHISPER DRIVE WD822KD User Manual

Page 12

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12

INSTALLATION STEP 1

Determine the Header Bracket Location

Installation procedures vary according to garage door
types. Follow the instructions which apply to your door.

1. Close the door and mark the inside vertical centerline of

the garage 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 13) when
clearance is minimal. (It may be mounted on the
wall upside down if necessary, to gain approximately
1/2" (1 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 13.

3. Open your door to the highest point of travel as shown.

Draw an inter secting horizontal line on 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 the 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 Wall

Level
(optional)

Unfi nished
Ceiling

Vertical Centerline
of Garage Door

OPTIONAL
CEILING
MOUNT
FOR
HEADER
BRACKET

Structural
Supports

2x4

2x4

Header Wall

Header Wall

Header Wall

Header Wall

Highest
Point
of Travel

Highest
Point
of Travel

Highest
Point
of Travel

Jamb
Hardware

Highest
Point
of Travel

One-piece door without track:
jamb hardware

Sectional door with
curved track

One-piece door without track:
pivot hardware

One-piece door with
horizontal track

2" (5 cm)

8" (20 cm)

8" (20 cm)

2" (5 cm)

Track

Track

Door

Door

Door

Door

Pivot

To prevent possible SERIOUS INJURY or DEATH:
• Header bracket MUST be RIGIDLY fastened to

structural support on header wall or ceiling,
otherwise garage 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 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 balance. An
unbalanced garage door might NOT reverse when
required.