The W396 manual is for the CJ1W Temperature Controller Modules.
You may need to register on the Omron247.com website to download the manuals.
Another option is to go to www.omron.ca (Canada).
From the menu on the left choose Support, then Document Library.
When the page loads, in the bottom box for Partial Document Number enter W238, then Go. It should pull up a link to the manual in pdf format.