Hey,

I am a apprentice fridge engineer and am getting on rather well.
I believed that I knew how to work out pressures and temperatures using pressure temperature charts but after a chat with my friend I am hugely mind boggled.

Could someone please explain to me in the simplest form about how to calculate pressures for systems, both AC and fridge.

I'm not 100% sure how to use the charts to figure out if a system is Short of gas or what the room temperature will be at x PSI and things like that.


Much appreciated for the responses