Chamberlain 3240 1/2 HP Garage Door Opener User Manual


 
13
Carriage Bolt
1/4"-20x1/2"
Lens
Wing Nut
1/4"-20
Figure 5
Wing Nut
1/4"-20
Staples
Carriage Bolt
1/4"-20x1/2"
HARDWARE SHOWN ACTUAL SIZE
Invisible Light Beam
Protection Area
Safety Reversing
Sensor
Safety Reversing Sensor
Bell Wire
Sensor Wire
Wire Clips
Rail
Figure 6
MOUNTING AND WIRING THE SAFETY SENSORS
Slide a 1/4"-20x1/2" carriage bolt head into the slot on
each sensor. Use wing nuts to fasten sensors to
brackets, with lenses pointing toward each other
across the door. Be sure the lens is not obstructed by
a bracket extension (Figure 5).
Finger tighten the wing nuts.
Recommended Wire Routing
1. Using insulated staples, run the wires from both
sensors to the rail at the door header (Figure 6).
2. Run the wires through wire clips at the top of the rails.
NOTE: If your access door is near the garage door, you
may choose to install the door control at this time and
run the door control wire along the rail with the sensor
wires.