Chamberlain 3265M 1/2 HP, 3265M, 3265M-267 Figure, Figure, SENSORS, SENSORS, TROUBLESHOOTING THE SAFETY REVERSING, ALIGNING THE SAFETY REVERSING SENSORS, MOUNTING AND WIRING THE SAFETY REVERSING

MOUNTING AND WIRING THE SAFETY REVERSING	Figure 5
SENSORS
• Slide a 1/4"-20x1/2" carriage bolt head into the slot on	Wing Nut
	1/4"-20
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).	Carriage Bolt
• Finger tighten the wing nuts.	1/4"-20x1/2"
	Lens

•Run the wires from both sensors to the opener. Use

	insulated staples to secure wire to wall and ceiling.		TROUBLESHOOTING THE SAFETY REVERSING
• Strip 7/16" (11 mm) of insulation from each set of wires.
			SENSORS
	Separate white and white/black wires sufficiently to		1. If the sending eye indicator light does not glow steadily
	connect to the opener quick-connect terminals. Twist
			after installation, check for:
	like colored wires together. Insert wires into
			• Electric power to the opener.
	quick-connect holes: white to white and white/black to
			• A short in the white or white/black wires. These can
	grey (Figure 6).
ALIGNING THE SAFETY REVERSING SENSORS			occur at staples, or at opener connections.
			• Incorrect wiring between sensors and opener.
•	Plug in the opener. The indicator lights in both the
			• A broken wire.
	sending and receiving eyes will glow steadily if wiring
			2. If the sending eye indicator light glows steadily but the
	connections and alignment are correct.
			receiving eye indicator light does not:
The sending eye amber indicator light will glow regardless
			• Check alignment.
of alignment or obstruction. If the green indicator light in
the receiving eye is off, dim, or flickering (and the invisible			• Check for an open wire to the receiving eye.
light beam path is not obstructed), alignment is required.			3. If the receiving eye indicator light is dim, realign either
•	Loosen the sending eye wing nut and readjust, aiming		sensor.
	directly at the receiving eye. Lock in place.		NOTE: When the invisible beam path is obstructed or
•	Loosen the receiving eye wing nut and adjust sensor		misaligned while the door is closing, the door will reverse.
	until it receives the sender’s beam. When the green		If the door is already open, it will not close. The opener
	indicator light glows steadily, tighten the wing nut.		lights will blink 10 times. See page 16.
			Connect Wire to
Figure 6			Opener Quick-Connect Terminals
	Bell Wire	Finished
		Ceiling
			1.	Strip wire 7/16"
		Bell Wire		(11 mm)
				7/16" (11 mm)
			2.	Twist like colored
				wires together
			3. To insert or release
				wire, push in tab with
				screwdriver tip

	Red White Grey
Safety Reversing Sensor	Quick-Connect Terminals

	Invisible Light Beam
Safety Reversing Sensor	Protection Area

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