Chamberlain C2405C Manuel D'installation page 14

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 horizon-
tal line as shown (with the arrow pointing toward the ceiling).
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.
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.
HARDWARE
WALL INSTALLATION
Structural
Wall Mounting
Support
Holes
Horizontal
UP
Highest Point
of Garage
Optional Mounting
Holes
Door Travel
CEILING INSTALLATION
Header
Bracket
6" (15 cm)
Maximum
Ceiling Mounting
Holes
Door Spring
UP
14
Header Wall
2x4
Header
Bracket
Line
Garage Door
Finished Ceiling
Garage Door
Vertical
Centerline of
Garage Door
Lag
Screw
Door
Spring
Vertical
Centerline of
Garage Door
Lag Screw
Header Wall