How to Install a Garage Door Opener
Time Required: 2-4 hours
The chain drive garage opener is the best-selling opener on the market. A motor pulls a chain, the chain pulls a carriage, and the carriage pulls a cable that opens the door. The direct drive opener works basically the same way except that the carriage travels along a large, threaded rod.
- The carriage raises and lowers the door and the carriage tube travels along it form the power unit to the front wall of the garage.
- Assemble carriage tube as directed.
- Make sure to seat the carriage tube pieces securely.
- Measure to verify the assembled length matches the length required by the manufacturer.
- Make any necessary adjustments.
- Mount the carriage on the front of the power unit.
- Attach the rail clamps, which will later connect to a bracket on the wall above the door.
- On some doors you’ll install switches and wiring at this point.
- Most units hang from angle irons and metal straps that have holes drilled in them at regular intervals.
- Bolt the angle irons to a rafter (or rafters) with lag screws.
- Attach the straps to the irons with hex-head screws.
- Attach the straps to the power unit with the hardware provided.
- Open the door several times to make sure it doesn’t hit the opener while moving.
- The door is opened by one arm that lifts it as the carriage travels along the tube.
- You must attach the bracket that connects the arm to the door before you can attach the arm itself.
- The exact location varies, depending on the door.
- Follow the manufacturer’s instructions.
- By law, all units have a safety device that shuts down the motor if something is in the path of a closing door. The safety device is usually a light beam and sensor.
- Mount one on each side of the door as directed.
- Plug the unit into its socket.
- Test the operation and make any necessary corrections.