Ive been a service tech for about 1 1/2 years now and I'm stating to do alot more commercial work. My question is sometimes I run into calls like customer says isn't keeping up all the time etc.
Say its a Cap tube system, how do I check for sub cooling if it doesn't have a service port on the liquid line? Can I put a pipe clamp on the hot vapor line leaving compressor atleast 8 inches away to stay away from excess compressor heat and pipe clamp after condenser coil and see drop across?
What is average drop if you can do that? If its a triple rolled or double rolled hard to tell if its moving enough heat out. How do you check that? Is there another way to make sure condenser is moving heat out like it should? Besides looking at pressures...
One more question how do you know what pressures should be besides checking subcooling/superheat?