75% Argon, 25% CO2
It's interesting there are two factory charging points on that AC.. Wonder why not just one?
Do they vacuum out the each AC before charging? Or do they have some kind of inert
flushing gas to clean all the air out of the system?
I once read some mini-split AC install directions that said to charge
up the system from one end, while leaving a half-tight fitting on the other end.
Once refrigerant was seen leaking out, crank down the lose fitting.
That sounded a bit crazy, even to me!
