Got a interesting problem with a york centrifigual and want to see if anyone else seen this and can give me some input. Anyway got a York YTH with a variable speed motor that does not seem to load. When the motor is at 60hz and the guide vanes (PRV) are at 100% here is what I got..... saturated evap refrigerant temp is 67 degrees, 23 evap approach, 10.3psia evap pressure, 38% motor current, 174 discharge temp, the condenser liquid level is 0% with a 50% setpoint and the evap is flood with liquid refrigerant. As the chiller runs the chilled water temperature continues to rise. It seems like the chiller is not moving any refrigerant at all. I disconnected the vanes and manually opened and closed the, it feels like the vanes are still moving but cant really tell unless we take off the suction elbow. Anyone have any ideas?
Thanks in advance