Installation - Merlin MT60 Installation And Operating Instructions Manual

ASSEMBLE HEADER SLEEVE
11
Thread spring nut on carriage bolt until finger tight. Insert a
screwdriver tip (1) into one of the slots of the nut ring (2) and
brace it firmly against the header sleeve. Place an open end
wrench (3) on the square end of the spring nut (4), slightly rotate
nut about 1/4 turn clockwise until nut ring (2) is released against
header sleeve (5). This sets spring to optimum chain tension.
Chain may slip off sprocket if chain is too loose. If chain does slip
re-tighten spring nut by turning nut clockwise a half turn. Do NOT
over-tighten chain.
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.
12 HEADER BRACKET POSITIONING
The header bracket must be rigidly fastened to a
structural support of the garage. Reinforce the
wall or ceiling with a 40 mm (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 centerline (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 5 cm
(2") above high point to provide travel clearance for
top edge of door.
13 INSTALL THE HEADER BRACKET
NOTE: Refer to vertical centre and horizontal lines created in
section 12 for proper placement of header bracket.
A. Wall mount: centre the header bracket (1) on the vertical
centre line (2) with the bottom edge of the header bracket on
the horizontal line (4) (with the arrow pointing toward the
ceiling). Mark all of the header bracket holes (5). Drill 4.5mm
(3/16") pilot holes and fasten the header bracket with wood
screws (3).
B. Ceiling mount: extend vertical centre line (2) onto the ceiling.
Centre the header bracket (1) on the vertical mark no more
than 150mm (6") from the wall. Make sure the arrow is pointing
toward the opener. Mark all of the header bracket holes (5).
Drill 4.5mm (3/16") pilot holes and fasten the header bracket
with wood screws (3). For concrete ceiling mount, use
concrete anchors provided.
INSTALLATION SECTION
4 4
(50 to 200mm depending on door type)
7
1
1
2
2
5
200mm
5
50mm
A
1 2
150mm
(6")
3
B
3
3
2
1
3
4
2 1
3
4