Update for anyone who finds this post.
I think this was the wrong thermostat for this type of AC. I went out and got an Ecobee to attach to the unit and it’s working great! I did have to call Ecobee to find that I had to change the O/B setting from its default but it’s working like a charm now!
I notice you haven’t posted anything to this community. Have you considered helping contribute to make this a better place?