Replacing a defective hermetic compressor that is noisy and not pumping. The refrigerant that was used was Hot Shot. The oil in the new compressor is Polyester and I want to use R404 or R134 for proper oil return. The unit is Medium cool and the thermestat is usually set at about 38 degrees.
The present compressor CS20K6E TF5-270 was not a burnout, just defective valves and not pumping at all. Both suction and discharge same pressure, The unit is 3 phase. Will change both suction and liquid filter driers and blow lines out with nitrogen.