Anaheim Automation Security+ 3850AD, Owner'S Manual

8

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 9) 
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 9.

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 9 for ceiling installation.

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.

One-piece door with horizontal track

Door

Track

Header Wall

Highest Point
of Travel

2" (5 cm)

Header Wall

Vertical Centerline
of Garage Door

Level
(optional)

2x4

2x4

Structural
Supports

OPTIONAL
CEILING
MOUNT
FOR
HEADER
BRACKET

Unfinished
Ceiling

Door

Jamb
Hardware

One-piece door without track: 
jamb hardware

8" (20 cm)

Highest 
Point
of Travel

Door

Pivot

8" (20 cm)

One-piece door without track: 
pivot hardware

Highest 
Point
of Travel

Header Wall

Header Wall

Header Wall

Sectional door with curved track

Highest Point
of Travel

Door

2" (5 cm)

Track