For the Flat rate manuals you will need to go on to BossWeb.
Click on the BossWeb logo to open BossWeb in another tab.
Use the following Credentials to Login:
Select from the main menu, Info Center and then Knowledge Center
Choose Documents & Articles
Then search for the following document
Click on it to open the following page:
Now select the product you require. You will be required to select the model and then you can open and view the document pertaining flat rate info for that specific unit.