To install a garage door opener first assemble the rail carriage pulley and motor compartment according to the instructions.
How to install a garage door opener chain.
Then install the motor brackets.
Attach brackets to the ceiling and door and position the end of the rail above the closed door.
Lift the power unit.
Lift the motor compartment into place on the ceiling and attach the rail and carriage to the bracket on the door.
Set it securely on top of a stepladder so it s conveniently close to the ceiling.
Place the opener on a ladder and use scrap lumber to get it at the height you need.
Fix the door bracket in place.
With a safety ring and a steel pin join the free end of the rail with the header bracket.
The garage door opener mounting bracket also called the header bracket secures the carriage tube to the wall above the door.
After that start installing the sensors.
The exact location depends on the type of door.
Follow the manufacturer s instructions to assemble the opener and mount the rail to the header bracket above the door.
Disengage the garage door from the opener by pulling down on the emergency pull cord to release the door trolley.
Press the wall control button or remote so that the opener completes its close cycle and the sprocket on.