- Pressure transducer reading is good;
- I've used same manometer for water pressure drop;
- Leak detector is working
- There is no variable flow actuator
- VGD is moving
But....
Today i've checked condenser level sensor. No good news.
I've set level control valve to MANUAL and I was able to start it and get it running. I had stable operation at 30% level control valve command. Anything below 30% and condenser level got high, visor got 100% filled and chiller started to surge.
However, I have two chillers running in parallel. Parameters below were taken when they both were at 55% input load, 13°C CWET, 7°C CWLT.
Chiller A, which is working properly:
-Active level setpoint = 46%
-Condenser refrigerant level = 46,8%
-Condenser refrigerant visor at about 25%
-Level control valve command = 23% (automatic mode)
Chiller B, which is the subject of this matter:
-Active level setpoint = 35%
-Condenser refrigerant level = 10,1%
-Condenser refrigerant visor at about 50%
-Level control valve command = 31,2% (manual mode)
As we can see, condenser liquid level sensor from chiller B is not reading correctly, as it reads only 10% when actual level is higher than chiller A which has 45% reading.
I operated chiller B like this for like 2hrs. At the moment i set the valve back to auto, valve was closing and it started to surge and shutdown.
Anything I can do other before replacing liquid level sensor?
ive uploaded some pictures.
PS.: As you can see, march 30th i got low pressure warning as well, but its not related. operator closed chilled water valve with chiller running.
