Chamberlain HD930EV User Manual download pdf (Page 12)

Installation

STEP 1 Determine the header bracket location

To preventpossible SERIOUS INJURY or DEATH:

Header bracketMUSTbe 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 MUSTbe used if mounting header bracketor 2x4 into masonry.

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

hardware, ALL ofwhich are under EXTREME tension.

ALWAYS call a trained door systemstechnician if garage door binds, sticks,or is outof balance.

An unbalanced garage door might NOT reverse when required.

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

door.

1. Close the door and mark the inside vertical centerline ofthe garage door.

2. Extend the line onto the header wall above the door.You can fasten the header bracketwithin 4

feet(1.22 m) of the leftor rightof the door center onlyif a torsion spring or center bearing plate is

in the way; or you can attach it to the ceiling (see page 12) when clearance is minimal. (Itmay be

mounted on the wall upside down if necessary,to gain 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 asshown here and on page 12.

3. Open your door to the highestpoint oftravel 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 ... 47 48

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Chamberlain HD930EV User Manual Page 12

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