Installing the Brackets

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 no higher than 6" (15 cm) above the floor. They may be installed in one of three ways, as follows.

Garage door track installation (preferred):

•Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door. 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 in Figure 1.

If your door track will not support the bracket securely, wall installation is recommended.

Wall installation (Figure 2 & 3):

•Place the bracket against the wall with curved arms facing the door. Be 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, no higher than 6" (15 cm) above the floor.

•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 (Figure 4):

•Use wood blocks or extension brackets (see Accessories) to elevate sensor brackets so the lenses will be no higher than 6" (15 cm) 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 1 DOOR TRACK MOUNT (RIGHT SIDE)

Door

Track

Lip

Indicator

Light

	Safety
	Reversing	Lens
	Sensor	Lens
	Sensor
	Bracket

Figure 2 WALL MOUNT (RIGHT SIDE)

Inside
Garage	Fasten Wood Block to Wall with
Wall	Fasten Wood Block to Wall with
Wall	Lag Screws (not provided)
	Lag Screws (not provided)
	Indicator
	Light	Safety
		Reversing
		Sensor
		Bracket
		Lag Screws
		(not provided)
	Lens

Figure 3 WALL MOUNT (RIGHT SIDE)

	Inside
	Garage	Extension Bracket
	Wall	Extension Bracket
	Wall	(See Accessories)
		(See Accessories)
		(Provided with
		Extension Bracket)

		Safety
(Provided with		Reversing
(Provided with		Sensor
Extension Bracket)		Sensor
Extension Bracket)		Bracket
		Bracket
	Lens	Indicator
	Lens	Light
		Light
Figure 4	FLOOR MOUNT (RIGHT SIDE)

HARDWARE SHOWN ACTUAL SIZE

Carriage Bolt	Wing Nut	Staples
1/4"-20x1/2"	1/4"-20

Inside

Garage

Wall

Attach with Concrete Anchors (not provided)

Lens

Indicator

Light

Safety

Reversing

Sensor

Bracket

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.

Chamberlain 3255M 1/2 HP Installing the Brackets, Garage door track installation preferred

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