Install The Door Bracket; Sectional Doors - Chamberlain Merik LiftMaster 7511LMK Manual De Instrucciones

Installation

8 Install the Door Bracket

Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE
installation of door bracket. Contact the garage door manufacturer or installing dealer for opener
reinforcement instructions or reinforcement kit. Failure to reinforce the top section as required
according to the door manufacturer may void the door warranty.
A horizontal and vertical reinforcement is needed for
lightweight garage doors (fiberglass, aluminum, steel,
doors with glass panel, etc.) (not provided). A horizontal
reinforcement brace should be long enough to be secured
to two or three vertical supports. A vertical reinforcement
brace should cover the height of the top panel. Contact the
garage door manufacturer or installing dealer for opener
reinforcement instructions or reinforcement kit.
NOTE: Many door reinforcement kits provide for direct attachment of the clevis pin and door arm. In this
case you will not need the door bracket; proceed to the next step.
SECTIONAL DOORS
1. Center the door bracket on the previously marked vertical centerline used for the header
bracket installation. Note correct UP placement, as stamped inside the bracket.
2. Position the top edge of the bracket 2"-4" (5-10 cm) below the top edge of the door, OR
directly below any structural support across the top of the door.
3. Mark, drill holes and install as follows, depending on your door's construction:
Metal or light weight doors using a vertical angle iron brace between the door panel support and the
door bracket:
Drill 3/16" fastening holes. Secure the door bracket using the two self threading screws.
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(Figure 1)
Alternately, use two 5/16" bolts, lock washers and nuts (not provided). (Figure 2)
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Metal, insulated or light weight factory reinforced doors:
Drill 3/16" fastening holes. Secure the door bracket using the self-threading screws. (Figure 3)
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Wood Doors:
Use top and bottom or side to side door bracket holes. Drill 5/16" holes through the door and
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secure bracket with 5/16"-18x2" carriage bolts, lock washers and nuts (not provided).
(Figure 4)
NOTE: The 1/4"-14x5/8" self-threading screws are not intended for use on wood doors.
FIGURE 1
Vertical Reinforcement
Vertical Centerline
of Garage Door
UP
Door Bracket
Self-Threading Screw
1/4" - 14x 5/8"
FIGURE 3
Vertical Centerline
of Garage Door
UP
Self-Threading
Screw
1/4" - 14x 5/8"
11
HARDWARE
Self-Threading Screw
1/4"-14x5/8"
FIGURE 2
Vertical Reinforcement
Vertical
Centerline
of Garage Door
Bolt 5/16"-18x2"
(Not provided)
Door Bracket
Lock Washer 5/16"
Nut 5/16"-18
FIGURE 4
Bolt 5/16"-18x2"
(Not provided)
Inside Edge of Door or
Reinforcement Board
Vertical
Centerline of
Garage Door
UP
UP