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WHY? This question goes with the surging question I asked earlier. I was wrong in that last post, when I thought it was surging and now know that it is just rumbling, and that's apparently OK, but I would still like to know how lowering the condenser water temperature entering the chiller...

Hey all, This is getting more interesting. Let me try to explain the layout of our system and see if I can get us all on the same page. We have six 2000 ton york chillers, all the same model numbers as described above. All chiller supply temp setpoints are equal at 37F. Fixed speed primary...

Thanks all for your responses. To Spector: I don't know that this system was designed for these chilled water temperatures or not, but my feelings are that it was not. I feel this way because our contracted plant supply temperature is 42F. However, we have been supplying these low teperatures...

As I promised: ...........................4am..............7am leaving chw temp...........36.8.............37.5 entering chw temp..........41.9.............44.0 evaporator pressure........31.9.............32.3 condenser pressure.........73.2.............73.6 oil...

Thanks everyone for your input and leads to further reading. Spector: I will print the information out tomorrow morning at 7am. It would be better if I was there a couple hours earlier but I won't be there at 5am unless someone makes me :) I'll post the info tomorrow evening around 6pm PST. By...

Our 2000 ton York centrifugal chiller will begin operating at very low load conditions now that the temps here are beginning to fall into the high 30's at night. We experienced surging last winter and my solution was to lower the condensor water temperature to 65F from 70F. I hope some kind soul...