Chamberlain Merlin Whisper Drive MT3850 Installation And Operating Instructions Manual page 15

ONE-PIECE TILT DOORS (B,C)
• Centre the door bracket on the top of the door, in line
with the header bracket as shown. Mark either the left
and right, or the top and bottom holes.
• Metal Doors: Drill 4.5mm pilot holes and fasten the
bracket with the self-threading screws provided.
• Wood Doors: Drill 8mm holes and use long carriage
bolts, spring washers and nuts (not provided)
depending on your installation needs.
NOTE: The door bracket may be installed on the top
edge of the door if required for your installation.
(Refer to the dotted line optional placement drawing).
Header Wall
Finished Ceiling
Timber Support
Header
Bracket
Door
Bracket
Optional
Placement
of Door
Bracket
Vertical
Centreline of
Garage Door
For a door with no exposed framing,
or for the optional installation, use
coach bolt (Not Provided)
to fasten door bracket.
Fiberglass, aluminum or lightweight steel garage doors WILL
REQUIRE reinforcement (not provided) BEFORE installation of
door bracket. Contact your door manufacturer for reinforcement
kit.
Door
Bracket
Door
Bracket
14
HARDWARE
Self-Threading Screw
METAL DOOR
Self-Threading
Screw
Top of Door
(Inside
Garage)
Top Edge
of Door
Optional
Placement
WOOD DOOR
Spring
Nut
Washer
Top of Door
(Inside
Garage)
Top Edge
of Door
Optional
Placement
Carriage Bolt
(Not Provided)