Recently got a job with Geo thermal vertical ground loop system. It has 8 heat pumps in the 3 to 5 ton range and a 30 ton chiller all runnig off the cooling or heating affect of the ground loop. The 30 ton system is going through compressors and the place is a contols nightmare. However I think they may be running out of capacity on the loop and causing some of there problems. I would like to no how to test the tonnage of the ground loop but I am not smart enough. Seems like to many variables to figure out. Any ideas?