Installing The Brackets - LiftMaster 8500 Manual Del Usuario

Installation

INSTALLING THE BRACKETS

Be sure power to the opener is disconnected. Install and align the brackets so the safety reversing sensors will face each other across
the garage door, with the beam no higher than 6" (15 cm) above the fl oor. Choose one of the following installations.
OPTION A: Track Installation
1. Slip the curved arms over the
rounded edge of each door track,
with the curved arms facing the door.
Snap into place against the side of the
track. It should lie fl ush, with the lip
hugging the back edge of the track, as
shown.
If your door track will not support the
bracket securely, wall installation is
recommended.
OPTION B: Wall Installation
1. Place the bracket against the wall
with curved arms facing the door. Be
sure there is enough clearance for the
sensor beam to be unobstructed.
2. If additional depth is needed, an
extension bracket (see Accessories)
or wood blocks can be used.
3. Use bracket mounting holes as a
template to locate and drill (2) 3/16"
diameter pilot holes on the wall at
each side of the door, no higher than
6" (15 cm) above the fl oor.
4. Attach brackets to wall with
lag screws (not provided).
If using extension brackets or wood blocks,
adjust right and left assemblies to the same
distance out from the mounting surface.
Make sure all door hardware obstructions
are cleared.
OPTION C: Floor Installation
1. Use wood blocks or extension
brackets (see Accessories) to elevate
sensor brackets so the lenses will be
no higher than 6" (15 cm) above the
fl oor.
2. Carefully measure and place right and
left assemblies at the same distance
out from the wall. Be sure all door
hardware obstructions are cleared.
3. Fasten to the fl oor with concrete
anchors as shown.
Extension Bracket (See Accessories)
(Provided with
Extension Bracket)
14
Door Track
Safety Reversing Sensor
Bracket
Fasten Wood Block to Wall with
Lag Screws (not provided)
Safety Reversing Sensor Bracket
Lag Screws (not provided)
(Provided with Extension Bracket)
Safety Reversing Sensor
Bracket
Attach with Concrete Anchors
(not provided)
Safety Reversing Sensor Bracket