Install The Safety Reversingsensor - Craftsman 139.53990 Owner's Manual

INSTALLATION STEP 10
Install The Safety Reversing Sensor
The safety reversing sensor must be connected
and aligned correctly before the garage door
opener will move in the down direction.
IMPORTANT INFORMATION ABOUT
THE SAFETY REVERSING SENSOR
When properly connected and aligned, the sensor
will detect an obstacle in the path of its electronic
beam. The sending eye (with an orange indicator
light) transmits an invisible light beam to the
receiving eye (with a green indicator light). If an
obstructionbreaks the light beam while the door is
closing, the door will stop and reverse to full open
position,and the opener lightswill flash 10 times.
The units must be installed inside the garage so that
the sending and receiving eyes face each other
across the door, no higher than 6" above the floor.
Either can be installedon the left or dght of the door
as long as the sun never shines directly into the
receiving eye lens.
The mountingbrackets are designed to clip onto the
track of sectional garage doors without additional
hardware.
• Be surepower is notconnected to thegaragedoor
opener BEFORE installing the safetyreversingsensor.
• To preventSERIOUS INJURYor DEATH froma closing
garagedoor:
- Correctly connectandalignthesafetyreversing
sensor. T hisrequired safetydeviceMUSTNOTbe
disabled.
- Installthesafetyreversing sensorso beamis NO
HIGHER than6"abovegaragefloor.
If it is necessary to mount the units on the wall, the
brackets must be securely fastened to a solid
surface such as the wall framing. Extension brackets
(see accessories) are available if needed, ff
installingin masonry construction,add a piece of
wood at each locationto avoid ddlling extra holes in
masonry if ropositioningis necessary.
The invisible light beam path must be unobstructed.
No part of the garage door (or door tracks, springs,
hinges, rollersor other hardware) may interruptthe
beam while the door is closing.
Senso(Beam
6" maximum
above floor
Facing the door from Inside the garage
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