Planning

Identify the type and height of your garage door. Survey your garage area to see if any of the conditions below apply to your installation. Additional materials may be

required. You may find it helpful to refer back to this page and the accompanying illustrations as you proceed with the installation of your opener.

SECTIONAL DOOR INSTALLATION

Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum,

door with glass panels, etc.). See page 19 for details.

Header Wall

FINISHED CEILING

Support bracket & fastening hardware is required.

See page 12.

Slack in chain tension is normal when garage door is closed.

Motor Unit

 

 

Extension Spring

 

 

OR

— —

 

Torsion Spring

Vertical Centerline

 

of Garage Door

Access Door

 

— —

 

Safety

 

 

 

 

Reversing

— —

 

Sensor

 

 

Gap between floor and bottom of door

must not exceed 1/4" (6 mm).

Safety Reversing Sensor

Wall- mounted Door Control

ONE-PIECE DOOR WITHOUT TRACK

Slack in chain tension is normal when garage door is closed.

Header

Wall

Wall-mounted

Door Control

FINISHED CEILING

 

Support bracket

 

& fastening

 

hardware is required.

 

See page 12.

Motor Unit

 

ONE-PIECE DOOR WITH TRACK

Slack in chain tension is normal when garage door is closed.

Access

Door

Safety

Reversing Sensor

 

Gap between floor and bottom of

Safety

door must not exceed 1/4" (6 mm).

Reversing Sensor

Safety

Reversing

Sensor

Gap between floor and bottom of door must not exceed 1/4" (6 mm).

Access

Door

Safety

Reversing

Sensor

4

Page 4
Image 4
Chamberlain 3245M 1/3 HP Planning, Sectional Door Installation, ONE-PIECE Door Without Track, ONE-PIECE Door with Track

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.