Thank you for posting your feedback. The installation instructions for the closer can be found on the door installation manual. If you no longer have the copy of the copy of the door installation manual, you can check this link to download the manual, https://www.stormdoors.com/installation-guides/#sort=relevancy. You may also contact the Andersen Storm Door Solution Center at 855-337-8822 for assistance about your door. Please be ready with the serial number upon your call. - Noel