Have you tried downloading from jw.org? Select the Bible and the language and download epub. Then "open in..." And select Equipd from the options. Then you can use the settings to display. It. Hope this helps.
Just like you would download a file from JW.org and "Open in..." iBooks, you need to do the same thing to load a Bible EPUB into the Equipd Bible - as explained by @Bohemian. There is also a great tutorial on AppChasers that has the steps explained in a tutorial: http://appchasers.com/2015/06/26/how-to-use-equipd-bible-for-iphone-and-ipad/