I am still in school for HVAC/R and we havent gone over mainfold gauges much. This is a very basic question that I would like some clarification on. It seems like there are only a few reasons to hook up the gauges:
1. To add/remove refrigerant from the system
2. Check superheat for evaporator performance
3. Check subcooling for condenser performance
What are some other reasons you would hook up gauges for? I know that each refrigerant has specific properties. boiling temp, condensing temp etc.. but, am not sure why I hear my boss at work say he hooked up the gauges to check the system when I know he didnt check the superheat or subcooling. What could he possibly be reading gauges and referencing the p/t chart for? Is there some simple calculation that I am missing? Thanks in advance for the help and forgivness of the simple question.