I've spent a lot of time reading over the last 2 days learning how to use a Pressure-Enthalpy chart. I'm kinda proud to say I finally understand it (mostly). Then, at the end of the chapter which deals with pressure-enthalpy charts in my textbook, the following statement is written: "These charts and tables are not normally used in the field for troubleshooting but are for engineers to use to design equipment. They help the technician understand the refrigerants and the refrigerant cycle".
Would seasoned refrig. mechanics agree with this statement? How much do you use the pressure-enthalpy chart?