My unit most likely has a slow leak. It recently faulted out for a water flow fault. I am tired of calling the crappy company who installed the unit in 2006 so I ordered parts and re-filled with antifreeze and also loop conditioner. The unit ran for awhile and faulted out for water flow again. I am at 60 psi like the instructions on the conditioner said to be at, so I wonder if I have air in the system? Could it have gotten in because of the leak? It is possible that I introduced some when re-filling the system. Can somebody please tell me how to check for this and also how to remove the air if I find it? Thank you very much. Alan.
Air will stop pumps from moving water Sure fire way to get rid of it is using a flush cart - basically an open container and a pump with enough punch to move water so fast through your loops that air is entrained and carried out. If your system has "Pete's Ports" it is a fairly simply DIY job to measure pressure difference across unit heat exchanger and look up flow in manufacturer tables A sport ball inflation needle plumbed to a halfway decent pressure gauge does the trick. Use the same gauge in both ports
Air in a loop field will stop water better than a ball valve or a gate valve. Can you hear the flow of fluid in your near machine piping? If so you have air. I tend to design against industry standards as I know flow because I am a wet head. There are ways to get the air out. Most involve high GPM and high head pumps. It can be done. If you need to do that I might do a retro-fit to include an air eliminator.
