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Chamberlain AccessMaster M885 - Install the Header Bracket

Chamberlain AccessMaster M885
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6
Installation
2 Install the Header Bracket
You can attach the header bracketeither to the wall above the garage door, or to the ceiling. Follow the
instructionswhich will work best for your particular requirements.Do not install the header bracket over
drywall. If installing into masonry, use concrete anchors (not provided).
HARDWARE
Lag Screw 5/16"-9x1-5/8"
OPTION A
WALL INSTALLATION
1. Center the bracketon the vertical centerline with the bottom edge of the bracket on the
horizontal line as shown (with the arrow pointing toward the ceiling).
2. Mark the vertical setof bracket holes (do not use the holes designated for ceiling mount).Drill
3/16" pilot holesand fasten the bracketsecurely to a structural supportwith lag screws.
Wall Mount
Optional
Mounting
Holes
Vertical
Centerline of
Garage Door
(Header Wall)
Header
Bracket
2x4 Structural
Support
Door Spring
(Garage Door)
Highest Point of
Garage Door
Travel
Horizontal
Line
Lag Screw
5/16" - 9 x 1-5/8"
OPTION B
CEILING INSTALLATION
1. Extend the vertical centerline onto the ceiling as shown.
2. Center the bracketon the vertical mark,no more than 6" (15 cm) from the wall. Make sure the
arrow is pointing toward the wall.The bracketcan be mounted flush againstthe ceiling when
clearance isminimal.
3. Mark the side holes.Drill 3/16" pilot holes and fasten bracketsecurely to a structural support
with lag screws.

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