Craftsman 139.53975SRT - Manual (Page 22)

Installation Step 10
Install the Safety Reversing Sensor
Be sure power to the opener is disconnected.
install and align the brackets so the sensors will
face each other across the garage door, with the
beam from 4 - 6" above the floor.
They may be installed in one of three ways,
depending on your requirements, as follows.
1. (Preferred) Clipped onto the left and right garage
door tracks. See Figure 2.
2. Fastened to the wall on each side of the garage.
See Figure 3.
3. Fastened to the floor (see Figure 4). Concrete
anchors and wood blocks or extension brackets
will be needed.
G arage door track installation:
• Slip the curved arms over the rounded edge of the
door track. Snap into place against the side of the
track. It should lie flush, 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.
W all installation:
• Place the bracket against the wall and make sure
there is enough clearance for the sensor beam to
be unobstructed.
• If additional depth is needed, an extension bracket
(see Accessories) or wood blocks can be used.
• 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, from 4-6“ above
the floor. (See warning at beginning of Installation
Step 10.)
• 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.
Floor Installation:
• Use wood blocks or extension brackets (see
Accessories) to elevate sensor brackets so the
lenses will be 4-6" above the floor.
• Carefully measure and place right and left
assemblies at the same distance out from the wall.
Be sure all door hardware obstructions are
cleared.
• Fasten to the floor with concrete anchors as
shown.
Figure 2
door track mount (Right Side)
Figure 3
wall mount (Right side)
Extension Bracket)
Figure 4
floor mount (Right side)
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