Chamberlain Power Drive PD420 Owner's Manual

Preparing your garage door

Planning

Carton inventory

Hardware inventory

Assemble the rail

Fasten the rail to the motor unit and install the trolley

Attach the rail brackets

Determine the header bracket location

Install the header bracket

Attach the rail to the header bracket

Position the opener

Hang the opener

Electrical requirements

Install the lights and lens

Fasten the door bracket

Connect door arm to trolley

Connect the door arm to the trolley

Adjust the force

Test the safety reversal system

Important safety instructions

Using the wall-mounted door control

Care of your opener

Having a problem

To erase all codes

To add or change a Keyless Entry PIN

Rail assembly parts

Motor unit assembly parts

Repair parts