Installation - Chamberlain Merlin Professional MT230 Installation And Operating Instructions Manual

Wear protective goggles when working overhead to protect your eyes from injury.
Disengage all existing garage door locks to avoid damage to the garage door.
To avoid serious personal injury from entanglement, remove all ropes connected to the garage door
before installing the opener.
It is recommended that the opener be installed 2.1m (7 feet) or more above the floor where space permits.
9
POSITION THE HEADER BRACKET
The header bracket must be rigidly fastened to a
structural support of the garage. Reinforce the wall or
ceiling with a 40mm (1-1/2") board if necessary.
Failure to comply may result in improper operation of
safety reverse system.
You can attach the header bracket either to the header
wall (1) or to the ceiling (3). Follow the instructions which
will work best for your particular requirements. With the
door closed, mark the vertical centreline (2) of the garage
door. Extend line onto header wall above the door.
Open door to highest point of travel. Draw an intersecting
horizontal line (4) on header wall 50mm or 200mm above
high point to provide travel clearance for top edge of door,
(height depends on door type refer section 15).
10
INSTALL THE HEADER BRACKET
Installing Header Bracket Pole
A. Wall Mount for one piece tilt doors: Centre the brack-
et (2) on the vertical guideline (1) with the bottom edge
of the bracket on the horizontal line (6). Mark either set
of bracket holes (4) if using a central fixing point. If
not use the screws provided to fasten the bracket
securely using the corner holes (5).
(3/16") pilot holes and fasten the bracket with wood
screws (3).
B. Wall Mount sectional and tracked tilt doors: Centre
the bracket (2) on the vertical guideline (1) with the bot-
tom edge of the bracket on the horizontal line (6). Mark
either set of bracket holes (4) if using a central fixing
point. If not use the screws provided to fasten the
bracket securely using the corner holes (5). Drill
4.5mm (3/16") pilot holes and fasten the bracket with
wood screws (3).
C. Ceiling Mount: Extend vertical guideline (1) onto the
ceiling. Centre the bracket (2) on the vertical mark no
more than 150mm (6") from the wall. Drill 4.5mm (3/16")
pilot holes and fasten the bracket with wood screws (3).
For concrete ceiling mount, use concrete anchors (7)
provided.
INSTALLATION SECTION
Drill 4.5mm
50mm to 200mm
(depending on door type)
6
1
4
2
4
A
2
5
B
200mm
50mm
3
7
C
2
150mm
(6")
3
6
1
3
1
3