Page 1
The Protector System™
Safety Reversing Sensor Model 87LM
WARNING
Without a properly working safety reversing
sensor, persons (particularly children) could be
killed by a closing garage door.
all instructions.
To protect small children, install the safety
reversing sensor so the beam is no higher than
4"-6" above the garage floor.
Disconnect power to the garage door opener
before installing the Protector System.
Read and follow
Installation procedures are
the same for sectional and
one-piece doors.
—Left Side of Garage—
Sensor
Unit
Invisible Light Beam
Protection Area
FIGURE 1 Facing the door from inside the garage
Look at the label on the connector end of each case
to identify the sensors.
The sending eye transmits an invisible light beam to
the receiving eye.
If an obstruction breaks the light beam while the
garage door is closing, the door will stop and reverse
to full open position; and the opener lights will flash
for 5 seconds to alert you to the obstruction.
The units can be installed on either side of the garage
door (Figure 1) as long as the sun never shines
directly into the receiving eye lens,
must be connected and fastened so that the sending
and receiving eyes face each other as shown in
Figure 1.
but
the brackets
— Right Side of Garage —
Sensor
Unit
The brackets
surface such as the studs on either side of the door,
or add a piece of wood at each location if installing in
masonry construction.
The invisible light beam path must be unobstructed.
No part of the garage door (or door tracks, springs,
hinges, rollers or other hardware) can interrupt the
beam while the door is closing. If it does, use a piece
of wood to build out each sensor mounting location to
the minimum depth required for light beam clearance.
must
be securely fastened to a solid
1
Page 2
Figures 2 , 3 and 4 show recommended assembly of
bracket(s) and "C" wrap based on the
wall
installation of
the sensors on each side of the garage door as shown
on page 1, or on the
garage door tracks
themselves.
Figures 5 and 6 are variations which may fit your
installation requirements better. Make sure the wraps
and brackets are aligned so the sensors will face
each other across the garage door.
Garage Wall or Door Track
Installation Procedure
• Fasten the "C" wraps to the mounting brackets with
square holes, using the hardware shown in Fig. 2.
Garage Wall
Installation Procedure
• Connect each assembly to a slotted bracket, using the
hardware shown in Fig. 3. Note alignment of
brackets for left and right sides of the door.
• Finger tighten the lock nuts.
• 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" above the floor (but not
exceeding 6"). See Warning on page 1.
• Attach bracket assemblies with 1/4"x1-1/2" lag screws
as shown in Fig. 3.
• 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 .
Garage WALL or DOOR TRACK Installation
Mounting Bracket
With Square Holes
#10 - 32
Lock Nuts
FIGURE 2
Garage WALL Installation
Inside
Garage
Wall
Lock Nuts
Garage
Door Track
1/4 x 1-1/2"
Lag Screws
Mounting Bracket
with Slot1/4" - 20
Garage DOOR Track Installation
Inside
Garage
Wall
1/4-20 x 1/2" Carriage Bolts
Mounting Bracket
with Square Holes
1/4 " Lock Nuts
"C" Wrap
#10-32x3/8"
Screws
(with square shoulder)
"C" Wrap
FIGURE 3
Mounting Bracket
with Square Holes
Garage Door Track
Installation Procedure
Discard slotted bracket. Drill 3/8" holes in each track and
fasten securely with hardware as shown in Fig. 4.
Hardware Shown Actual Size
#10 - 32 x 3/8"
Screw
Garage
#10 x 32
Lock Nut
Alternate Wall Mount
Inside
Wall
Mounting Bracket
with Slot
Mounting Bracket
with Square Holes
"C" Wrap
Sensor
Indicator Light
1/4 x 1-1/2"
Lag Screw
Drill 3/8"
Holes
1/4-20 x 1/2"
Carriage Bolts
Staples
Alternate Floor Mount
Inside
Garage
Wall
"C" Wrap
Indicator Light
FIGURE 4
1/4" - 20 x 1/2"
Carriage Bolts
Sensor
Mounting Bracket
with Square Holes
Mounting Bracket
"C" Shaped
Wrap
1/4" - 20
Lock Nut
with Slot
Attach with
concrete anchors
(not provided)
Garage
Floor
Garage
Floor
FIGURE 5 FIGURE 6
2
Page 3
FIGURE 7
Connect Wire to
Opener Terminals
Bell Wire
Sensor
Finished
Ceiling
Invisible Light Beam
Protection Area
Sensor
• Center each sensor unit in a "C" wrap with lenses
pointing toward each other across the door.
• Secure sensors with the hardware shown in Figure
7. Finger tighten the wing nut on the
receiving eye
allow for final adjustment. Securely tighten the
sending eye
wing nut.
• Run wires from both sensors to the opener as
shown in Figure 7. Use insulated staples to secure
the wire to the wall and ceiling.
• Connect both sets of wires to the opener terminals
as shown (depending upon your model).
• Plug in the opener. If your opener has the Multi-
Function Door Control, make sure the Lock Feature
is
off
. Red indicator lights in both the sending and
receiving eyes will
glow
if wiring connections and
alignment are correct.
If the indicator lights are
blinking
(and the invisible
light beam path is not obstructed), alignment is
required.
• Loosen the receiving eye wing nut to allow slight
rotation of unit. Adjust sensor vertically and/or
horizontally until the red indicator light
glows
.
• When indicator lights are glowing in both units,
tighten the wing nut in the receiving eye unit.
Bell Wire
to
Door Control
Connections
(dotted line)
RED-1
OPENER TERMINAL SCREWS
Wing Nut
WHT-2
"C" Wrap
Sensor
Connect Sensor Wires
to Opener Terminals
Hardware Shown Actual Size
1/4-20 x 1-1/2"
Hex Bolt
Sensor
Connections
BLK-3
Wire
Indicator Light
1/4-20 x 1-1/2"
Hex Bolt
Sensor Connections
BLK
WHT
RED
Wing Nut
3
Page 4
TEST THE PROTECTOR™ SYSTEM
• Press the remote control push button to open the door .
• Place the opener carton in the path of the door.
• Press the remote control push button to close the door.
The door will not move more than an inch, and the
opener light(s) will flash.
The garage door opener will not close from a remote
control if the indicator light in either sensor is
blinking
a. not connected, b. misaligned or c. obstructed).
The garage door can be closed by pressing and
holding the Door Control push button until down travel
is completed.
(alerting you to the fact that the sensor is:
TEST THE SAFETY REVERSE SYSTEM
TEST:
• Place a one-inch board (or a 2x4 laid flat) on the
floor, centered under the garage door.
• Operate the door in the down direction. The door
must
reverse on striking the obstruction.
ADJUSTMENT:
If the door
far enough in the down direction.
• Increase the DOWN limit by turning the DOWN limit
adjustment screw counterclockwise 1/4 turn.
• Repeat the test.
On a sectional door, make sure limit adjustments
do not force the door arm beyond a straight up
and down position.
• When the door reverses on the one-inch object,
remove the obstruction and run the opener through
3 or 4 complete travel cycles to test adjustment.
If the door will not reverse after repeated
adjustment attempts, call for professional door
service.
stops
on the obstruction, it is not traveling
WARNING
Without a properly working Protector™
System, persons (particularly children) could
be seriously injured or killed by a closing
garage door.
Repeat this test once a month.
Professional service is required if the opener
closes the door when the Protector System is
obstructed.
WARNING
Failure to test and adjust the safety reverse
system may result in serious injury or death
from a closing garage door.
once a month and adjust as needed.
GARAGE DOOR
Repeat this test
One-Inch board (or a 2x4 laid flat)
1 Inch Obstruction
Trouble Shooting
1. If the
sending eye
does not glow after installation, check for:
• Electric power to the opener.
• A short in the black/white wires. These can occur
under staples or at screw terminal connections.
• Incorrect wiring between sensors and opener.
• An open wire (wire break).
or
receiving eye
indicator light
2. If only the
the invisible light beam path is
check for an open wire to the receiving eye.
3. If both sensors are blinking, realign or remove
obstruction.
receiving eye
indicator light is
not
obstructed),
off
(and
Replacement Parts
TOLL FREE NUMBER - 1-800-528-9131
2-strand black & white wire with connector 41B41 15
Safety Sensor Kit (receiving and sending eyes only) 41A4373
Safety sensor hardware bag 41A41 16
©1993, The Chamberlain Group, Inc.
114A1564G All Rights Reserved Printed in Mexico
C-Wrap Bracket 12B483
Square Hole Bracket 12B484
Slotted Bracket 12B485
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