Klove, some time ago you helped me with a yk surging. We talked about the loop bypass being in the wrong place. Well, I finally shut the plant down the other night and welded in a valve in the bypass. May be hard to get the full picture but the 4 chillers have dedicated pumps to each. I was able to use the 150ft hd vsd "loop pumps" to pump through the dead chiller pumps, through the chiller and out to the loop with no option of bypass. It now can be ran as a vairable primary once we get some contol issues out of the way. We were running 1250 tons with 1000gpm less pumping that one day before this with a constant discharge water temp. The loop pumps need tweeking and that is were my question comes in. What is the max rate of change that York wants to see with chill water flow? What about return water temp rate of change? There is about 10 buildings on the loop that will demand flow as required.
Thanks! Others invited to join in as well!!