Thank you my man. I had no idea about cardiagn. Lots of info here. Much appreciated!!I'll be doing the same for a chiller install. I'm going to DIY vac down and leak test mine before it goes to the shop. Haven't done the process yet though.
I'd reach out to @Fx2beast for tips. He's a tech and did the whole HVAC process for his chiller.
How to Vacuum Down and Recharge Your A/C System video
R1234yf Vacuum Pump and Manifold Gauge Set
Free version I use. I didn't download it:
https://cardiagn.com/ford-mustang-2015-2018-service-repair-manual-wiring-diagrams/
HVAC section. Use Ctrl+F to search key words:
https://cardiagn.com/2015-18-ford-mustang-climate-control-system-general-information/