My kids hockey rink manager might be looking to me to work on the ice rink chiller. Haven't worked on chillers for quite some time and don't know a ton about them. I took a quick look at it today with no tools, gauges, note pads, etc...
Here is what I know and I'll see if I can get pressures, temps, compressor info later today possibly
-100 ton R22 system, secondary system with Glycol
-One compressor that he says is running unloaded for quite a bit.
-Having oil return problems, says its getting trapped in the chiller.
-Says oil is getting trapped because the chiller is below the compressor outside.
-does have a oil separator.
-Says they are running their headpressure high to try to keep the oil coming back. Headpressure when I checked was 267psi, can't remember suction...
-Says that this system was literally pieced together.
My quess is that the oil isn't returning while the compressor is running unloaded. Chiller isn't really "below" the compressor outside but it may be slightly lower than the compressor but not by much.
Any ideas guys??