LiftMaster J door operator - Manual (Page 21)

21
ENTRAPMENT PROTECTION
Entrapment Protection
Mounting Bracket with Square Holes
“C” Wrap
Screws#
10-32x3/8"
Lock Nuts
#10-32
INSTALL THE PHOTOELECTRIC SENSORS (PROVIDED)
WALL INSTALLATION
2
Connect each assembly to a slotted bracket, using the
hardware shown. Note alignment of brackets for left and
right sides of the door.
3
Finger tighten the lock nuts.
4
Use bracket mounting holes as a template to locate and drill
(2) 3/16" diameter pilot holes on both sides of the garage
door, 4-6 inches (10-15 cm) above the fl oor. Do not exceed
6 inches (15 cm).
5
Attach bracket assemblies with 1/4"x1-1/2" lag screws.
6
Adjust right and left side bracket assemblies to the same
distance out from mounting surface. Make sure all door
hardware obstructions are cleared. Tighten the nuts securely.
ALTERNATE FLOOR INSTALLATION
2
Discard slotted bracket. Drill 3/8" holes in each track and
fasten securely with hardware .
DOOR TRACK INSTALLATION
Lag Screws
1/4x1-1/2"
Carriage Bolts (with square
shoulders) 1/4-20x12"
Lock Nuts
1/4"-20
Inside
Wall
Mounting Bracket
with Slot
Mounting Bracket with
Square Holes
“C” Wrap
Inside
Wall
“C” Wrap
Mounting Bracket with
Square Holes
Lock Nuts 1/4"
Door Track
Drill 3/8" Holes
Carriage Bolts 1/4-20x1/2"
Sensor
with Wire
Inside
Wall
Indicator Light
Mounting Bracket with
Square Holes
Mounting Bracket
with Slot
“C” Wrap
- Floor -
Attach with Concrete Anchors (Not Provided)
The following instructions show recommended assembly of the bracket(s) and “C” wrap based on the wall installation of the
photoelectric sensors on each side of the door or on the door tracks themselves. There are also alternate mounting methods which may fi t
your installation requirements better.
Make sure the wraps and brackets are aligned so the photoelectric sensors will face each other across the door.
Fasten the “C” wraps to the mounting brackets having square
holes, using hardware shown.
1
Indicator Light
ALTERNATE WALL INSTALLATION
Mounting Bracket
with Slot
“C” Wrap
Sensor with Wire
Inside
Wall
- Floor -
Mounting Bracket with
Square Holes