Chamberlain 248730 User Manual download pdf (Page 12)

Installation

STEP 1 Determine the header bracket location

To prevent possible SERIOUS INJURY or DEATH:

• Header bracket MUST be RIGIDLY fastened to structural supporton header wall or ceiling,

otherwise garage door might NOT reverse when required. DO NOT install header bracket over

drywall.

• Concrete anchors MUSTbe used if mounting header bracket or 2x4 into masonry.

• NEVER try to loosen, move or adjustgarage door, springs, cables,pulleys, brackets,or their

hardware, ALL of which are under EXTREME tension.

• ALWAYS call a trained door systemstechnician if garage door binds,sticks,or is out of balance.

An unbalanced garage door might NOT reverse when required.

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 orcenter bearing plate is in the way; or you can attach it to

the ceiling 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.

3. Open your door to the highestpoint of travel as shown. Draw an intersecting horizontal line on

the header wall 2" (5 cm) 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 12 for

ceiling installation.

Header Wall

Vertical Centerline of Garage Door

2x4

Structural

Supports

Level

(Optional)

Unfinished

Ceiling

2x4

OPTIONAL CEILING MOUNT

FOR HEADER BRACKET

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

One-piece door without track:

pivot hardware

Header Wall

8" (20 cm)

Highest

Point of

Travel

Door

Pivot

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 43 44

Comments to this Manuals

No comments

Chamberlain 248730 User Manual Page 12

Comments to this Manuals

Related products and manuals for Kitchen Chamberlain 248730