Yes all valves are 100% open. That's how we have to verify flow. With all valves completely open and pump at full capacity. The system is under control so we could shut down zones, even though the system runs on vertical risers from one main loop. But that's not how we are spec'ed to verify for...
They're griswold space saver pic-v valves. Originally spec'ed for Belimo's and went to griswold on valves under 1". Which happens to be 97% of them. The belimo's are having no problems. The griswold are all over the place. BE at its finest. I'm thinking you're right. I'm leaning toward the pump...
The pump is controlled by A VFD, but not yet. Right now it's just running in hand at full 60 hz because that's what the commissioning requirements are, verifying proper dP at each valve with the pump at full bore. I agree that we should be seeing higher dP at the units closest to the pump but we...
Ok any and all input is greatly appreciated. I am at a complete loss. A little background to this system. 5 story building with vertical FCU's in each of around 50 typical rooms per floor. Modulating PIC-V's in all units. Chilled water is coming in from a central plant. Main building loop is on...
