Install the Light and the Lens

6.Attach the User Safety Instruction label to the wall near the door control, and the Maintenance Instruction label in a prominent location on the inside of the garage door.

Page 32 explains how to use the door control.

Do NOT connect the power and operate the openerat this time. The trolley will travel to the full open position but will not return to the

close position until the sensor beam is connected and properly aligned.

See Safety Reversing Sensor instructions beginning on page 21.

Installation Step 7

Install the light

•Install a 75 watt maximum light bulb in the socket. The light will turn ON and remain lit for approximately 4-1/2 minutes when power is connected. Then the light will turn OFF.

•If the bulb burns out prematurely due to vibration, replace it with a standard neck "Garage Door

Opener" bulb.

Install the lens

•For convenience, the lens may be installed after Adjustment Step 4 on page 30.

•Apply slight pressure on the sides of the lens and slide the tabs into the slots in the end panel.

•Reverse the procedure to remove the lens.

Ught

Lens

Gu_e

Slot

5UghtWattBulbMax.

Lens

Tab

Installation Step 8

Attach the Emergency

Release Rope and Handle

•Thread one end of the rope through the hole in the top of the red handle so "NOTICE" reads right side up as shown. Secure with an overhand knot, at least 1" from the end of the rope to prevent slipping.

•Thread the other end of the rope through the hole in the release arm of the outer trolley.

•Adjust rope length so the handle is 6 feet above the floor. Secure with an overhand knot.

If it is necessary to cut the rope, heat seal the cut end with a match or lighter to prevent unraveling.

Do not use the red handle to pull the door open or closed. The rope knot could become untied and you could fail Use the emergency release only to disengage the trolley and, if possible, only when the door is closed.

Garage doors are heavy. If the door is open when the handle is pulled, the door could

close inadvertently if it is not properly balanced. Serious injury may result to persons under the door. Make sure the doorway is clear

of persons and obstructions before pulling handle when door is open.

Trolley

_1--Emergency

Release Handle

139.53978SRT specifications

The Craftsman 139.53978SRT is an advanced garage door opener that combines reliability, performance, and ease of use. Designed to cater to the needs of modern homeowners, this model stands out with its robust features and technological innovations.

One of the key highlights of the Craftsman 139.53978SRT is its powerful motor, delivering a peak horsepower equivalent to ensure smooth and efficient operation. This allows it to effortlessly lift even the heaviest of garage doors, making it suitable for various types of residential garage doors. The quiet operation of this opener is another major advantage, allowing for a peaceful environment in and around the garage.

Another notable feature is the smart technology integration. The Craftsman 139.53978SRT is compatible with a range of smart home systems, allowing users to control their garage door remotely via a smartphone app. This feature not only adds convenience but also enhances security, as users can receive alerts and notifications about the status of their garage door, ensuring peace of mind.

Security is a priority with this model, which comes equipped with rolling code technology. This mechanism generates a new code each time the remote is used, preventing unauthorized access and ensuring that your garage remains secure from intruders. Additionally, the enhanced safety features include safety sensors that detect obstacles, automatically reversing the door's movement if something is detected, thereby preventing accidents.

Installation and setup are straightforward, thanks to the user-friendly design of the Craftsman 139.53978SRT. The unit includes detailed instructions and all necessary hardware for installation. Many users can set it up within a few hours without the need for professional assistance.

With a durable construction, the Craftsman 139.53978SRT is built to last. It has a sleek design that complements various home aesthetics while withstanding wear and tear from daily use. Maintenance is minimal, with easy access to essential components for servicing.

In summary, the Craftsman 139.53978SRT offers a perfect blend of power, technology, and security features. Its user-friendly design, combined with smart technology compatibility and robust safety measures, makes it an ideal choice for homeowners seeking a reliable garage door opener. Whether you’re looking to upgrade an old system or install a new one, this model is sure to meet your requirements and enhance the functionality of your garage.

Craftsman 139.53978SRT Install the Light and the Lens, Install the light, Install the lens

Models: 139.53978SRT