Non-work shared files are added to a vault using the Save to Vault command. When a file is Saved to Vault, it is automatically checked into the vault.
Make sure that your folder mappings are in place before adding files to the vault with the Revit Vault Add-in. This folder mapping is used to determine where to add or update the file in Vault.
After Saving a file to Vault, if you continue to edit the file, the file is automatically checked back out.
To Save a non-work shared file to a vault