Manuals / Chamberlain / Household Appliance / Garage Door Opener

Chamberlain 3255-2M 1/2 HP, 3245M 1/3 HP Mounting and Wiring the Safety Reversing Sensors

Models: 3255M 1/2 HP 3245M 1/3 HP 3255-2M 1/2 HP

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MOUNTING AND WIRING THE SAFETY REVERSING

Figure 5

 

SENSORS

 

 

Wing Nut

 

 

 

• Slide a 1/4"-20x1/2" carriage bolt head into the slot on

 

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

Carriage Bolt

 

bracket extension (Figure 5).

 

 

 

1/4"-20x1/2"

Lens

• Finger tighten the wing nuts.

 

 

 

 

 

• 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 quick-

 

• Electric power to the opener.

 

connect holes: white to white and white/black to grey

 

• A short in the white or white/black wires. These can

(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 doesn’t:

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.

Figure 6

 

Connect Wire to

 

 

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 release or insert

 

 

 

wire, push in tab with

 

 

 

screwdriver tip

Red White Grey

Safety Reversing Sensor

Quick-Connect Terminals

Safety Reversing Sensor

Invisible Light Beam

Protection Area

18

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Chamberlain 3255-2M 1/2 HP Mounting and Wiring the Safety Reversing Sensors, Troubleshooting the Safety Reversing
Page 17 Page 19

3255M 1/2 HP, 3245M 1/3 HP, 3255-2M 1/2 HP specifications

The Chamberlain 3255-2M, 3245M, and 3255M garage door openers stand out in the market for their reliability and superior performance. Each model offers a unique combination of power and features, catering to different needs and preferences.

The Chamberlain 3255-2M is a robust 1/2 HP opener designed for heavy residential garage doors. Its powerful motor ensures smooth and efficient operation, making it ideal for doors weighing up to 7 feet high. This model incorporates the latest in opening technology, including a durable chain drive mechanism that provides strength and longevity. One of its significant features is the incorporated MyQ technology, enabling users to control their garage door remotely through a smartphone app. This innovative feature brings convenience and peace of mind, as homeowners can check the status of the door from anywhere.

Another excellent choice is the Chamberlain 3245M, a 1/3 HP model that offers a balance of performance and affordability. It is suitable for lighter doors, providing consistent and reliable opening and closing. The 3245M model also boasts a protective cover that enhances its durability against the elements. It operates quietly thanks to its direct drive system, making it an excellent option for garages attached to living spaces. Like the 3255-2M, this model is also equipped with MyQ technology, allowing users to monitor and control their garage door from their smartphones seamlessly.

Finally, the Chamberlain 3255M, another 1/2 HP opener, offers similar features to the 3255-2M but with a focus on belt drive technology. This model is built for quieter performance, making it ideal for homes where noise is a concern. The belt drive reduces vibrations and sound, ensuring a smoother user experience. This model also comes with a battery backup system, which provides added security during power outages.

All these models emphasize safety and security, featuring auto-reverse functionality that senses obstacles and prevents the door from closing on them. The Chamberlain garage door openers are also equipped with a rolling code technology that changes the access code each time the remote is used, enhancing security against unauthorized access.

In summary, the Chamberlain 3255-2M, 3245M, and 3255M garage door openers cater to a variety of needs with their powerful motors, innovative technologies, and user-friendly features. Their reliability and performance make them an excellent investment for any homeowner.