E-Culligan has a webpage with links to Culligan water softener and drinking water system manuals. As of 2015, these include installation and operator's manuals for the Premier Water Softener, Mark 100 Water Softener, Mark 1000 Water Softener and Mark 10 Water Softener. These manuals only come in PDF format.
The manuals cover basic installation and operating features of the water softeners, including changing machine settings, unit capacity, salt settings, plumbing connections and machine placement. Some of the manuals also include visual diagrams to illustrate installation procedures.
Aqua Systems and Pelican Water Systems also have online manuals for their water softeners.