18
1/2 HP Chain Drive Garage Door Opener
2. To attach the safety sensor bracket, hook the bottom edge of the bracket on the back side of the
wheel track and pull until the bracket snaps onto the track. Then secure the bracket to the rail with the
knobs. Repeat to install the other bracket on the other wheel track.
NOTE:
If your garage door is a one-piece door, secure the sensors directly to the wall with two M4-20 screws.
3. Attach each of the two sensors to the sensor bracket using an M5 screw, flat washer, and a wing nut.
Note the “Sending/Transmitting” sensor marked with a “T” and “Receiving” sensor marked with an “R”
for the next step.