Alfa basement air service

Thanks again to everyone for the help. I think I finally have the basement air removal process clear in my old mind ??. It’s still working, but has a musty smell when first starting up, so I’m sure it’s in desperate need of a good cleaning. Going to get things together and tackle it sometime next week. I’ll take pictures and let y’all know how it turns out. Again, thanks so much for all the tips and advice!