Installation - Merlin MT5580P 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.
12 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
best suit 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 50mm or 200mm above
high point to provide travel clearance for top edge of
door, (height depends on door type refer section 15).
INSTALL THE HEADER BRACKET
13
NOTE: Refer to vertical centre and horizontal lines cre-
ated in section 12 for proper placement of header
bracket.
A. Wall mount: centre the header bracket (1) on the verti-
cal centre line (2) with the bottom edge of the header
bracket on the horizontal line (4) (the horizontal line
should be 50 mm for Sectional Doors & Tracked Tilt
Doors and 200mm for One Piece Tilt doors, above the
spring 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. 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.
The Idler Pulley Bracket will also need to be turned
upside down (fig 1). To do this remove the chain from
the pulley, twist the Idler bracket 180
down position & reassemble the chain around the
pulley.
INSTALLATION SECTION
in to the upside
0
8
1
4
2
CEILING MOUNT ONLY 5
UP
1
5
50mm
(or 200mm)
A
5
1
CEILING MOUNT ONLY
UP
150mm
B
g 1
3
4
2
3
2
3