Chamberlain HD920EV Owner's Manual page 13

Installation
STEP 2 Install the header bracket
You can attach the header bracket either to the wall above the garage door, or to the ceiling. Follow the
instructions which will work best for your particular requirements. Do not install the header bracket over
drywall. If installing into masonry, use concrete anchors (not provided).
Lag Screw 5/16"-9x1-5/8"
OPTION A
WALL INSTALLATION
1. Center the bracket on the vertical centerline with the bottom edge of the bracket on the
horizontal line as shown.
2. Mark the vertical set of bracket holes. Drill 3/16" pilot holes and fasten the bracket securely to a
structural support with the hardware provided.
Wall Mount
2x4 Structural
Support
UP
Horizontal
Line
Optional Mounting
Holes
Highest Point
of Garage
Door Travel
HARDWARE
(Header Wall)
Vertical
Centerline of
Garage Door
Header
Bracket
Door Spring
(Garage Door)
OPTION B
CEILING INSTALLATION
1. Extend the vertical centerline onto the ceiling as shown.
2. Center the bracket on the vertical mark, no more than 6" (15 cm) from the wall. Make sure the
arrow is pointing away from the wall. The bracket can be mounted flush against the ceiling
when clearance is minimal.
3. Mark the side holes. Drill 3/16" pilot holes and fasten bracket securely to a structural support
with the hardware provided.
Ceiling Mounting
Holes
UP
Lag Screw
5/16"-9x1-5/8"
12
Header
Bracket
6" (15 cm)
Maximum
Door Spring
(Garage Door)
(Finished Ceiling)
Vertical
Centerline of
Garage Door
Lag Screw
5/16"-9x1-5/8"
(Header Wall)