u/Sea_Pilot_320

Recently did a coil swap on an air to water chiller this past week and it made me wanna learn more about them. I don’t know where to start, buddy of mine told me to learn about condensor and evap approach. Any tips or things to read/buy so I can learn?

As the title states I was wondering how these watches hold up to the trades people/anyone who work with their hands. I am notorious for cracking Iphones and them not being in the greatest shape when i go to trade them in. I also never wear watches, so would I just be wasting my money just for the convenience? Or are they pretty durable