Crawl up into your attic or wherever the air circulator is installed and find the exact model number of your unit. See if instructions can be found here: https://web.archive.org/web/20160603194940/https://vanee.edenenergy.com/res-air-exchangers-literature.php
If not, I would contact vanEE directly. I had to use the Wayback Machine as the documentation section on their current site is blank.