I understand that. I work on a lot of pump down systems.
Originally Posted by BBeerme
Now add a partial restriction that cant be seen. Low head. Low suction. High sh. Joe scmoe doesnt know better so he keeps adding gas until he has a 70psi suction. Restriction gets a little worse and system not performing well, now i get the call out there.
I find low suction. High sh. High sc. And high head. Restriction with an overcharge. How do i know you may ask?
Total charge should be 10lbs. Recover 20 or more lbs and fix restriction. Weigh back in 10lbs and all is good.
Sent from my SM-N900V using Tapatalk
Yeah, this post reminds me of a 'test' question I like ask rookies. The question goes like this: All else being normal, for example a normal install with normal duct work, and all motors working proper etc, you walk up to an A/C with low pressures. What is the first thing you do?
Originally Posted by gravity
The answer, of course, is to measure the subcooling. Even close to 50% of experienced techs will say to add gas. As you indicated above, if you have a high subcooling, adding gas won't help the situation.
I have a carrier roof package gas that had a burn out. It is restricted. I think I am going to cut it out and install a txv.