Hang The Opener - LiftMaster MERIK SECURITY+ 790LMK Manual Del Propietário

INSTALLATION STEP 5

Hang the Opener

Three representative installations are shown. Yours may be
different. Hanging brackets should be angled (Figure 1) to provide
rigid support. On fi nished ceilings (Figure 2), attach a sturdy
metal bracket to structural supports before installing the opener.
This bracket and fastening hardware are not provided.
Existing brackets from a previous installation may be fastened
to the sides of the motor unit as in Figures 1 and 2, or to the
mounting tabs as shown in Figure 3. Then continue with step 5
below.
1. Remove from packaging. Measure the distance from each side
of the motor unit to the structural support.
2. Cut both pieces of the hanging bracket to required lengths.
3. Drill 5 mm pilot holes in the structural supports.
4. Attach one end of each bracket to a support with
5/16"-18x1-7/8" lag screws.
5. Fasten the opener to the hanging brackets with
5/16"-18x7/8" hex bolts, lock washers and nuts.
6. Check to make sure the T-rail is centered over the door (or in
line with the header bracket if the bracket is not centered above
the door).
7. Remove the 38 mm board. Operate the door manually. If the
door hits the rail, raise the header bracket.
HARDWARE SHOWN ACTUAL SIZE
Lag Screw
Lag Screw
5/16"-18x1-7/8"
5/16"-18x1-7/8"
Hex Bolt
Hex Bolt
5/16"-18x1-7/8"
5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Lock Washer 5/16"
Nut 5/16"-18
To avoid possible SERIOUS INJURY from a falling garage door
opener, fasten it securely to structural supports of the garage.
Concrete anchors MUST be used if installing ANY brackets into
masonry.
Figure 1
Measure
Distance
5/16"-18x7/8"
Hex Bolts
5/16" Lock Washers
5/16"-18 Nuts
Figure 2
Hidden
Support
Bracket
(Not Provided)
5/16"-18x7/8" Bolt
5/16" Lock Washer
5/16"-18 Nut
Preferred range of
bracket placement
Figure 3
Bracket
(Provided)
Utilizing existing top mount installation
21
Lag Screws
5/16"- 18x1-7/8"
Preferred range of
bracket placement
13 mm Socket Wrench
FINISHED CEILING
Lag Screws
5/16"-18x1-7/8"
(Not Provided)
5/16"-18x7/8" Bolt
5/16" Lock Washer
5/16"-18 Nut
Existing Brackets
Structural
Supports