Manuals for Amana's Packaged Terminal Air Conditioners can be downloaded at the official Amana PTAC website, as of 2015. The website offers manuals and product specifications for several different units including discontinued models.
From the Amana PTAC main page, click on the word Literature in the top menu of the website. Choose the appropriate version of the manual that you want to download and click the link. Depending on your Internet browser settings, the file either opens in a browser window or a save box appears on the screen, in which case you can save the file in PDF format.