I have an institutional building with a primary chiller loop,two 50 hp circ pumps running together in parrallel,on freq drives with a mix of two way and three way cw mixing valves at the airhandlers.
There are four chillers on secondary loops staged by DDC feeding the primary loop.
Due to some recent repiping issues my client would like to convert to using a glycol solution in their loop.
I think i understand the basics of what can be expected,lower chiller operating pressures,reduced pump flow,reduced heat transfer.
Just looking for some feedback on what changes if any might need to be taken to avoid any problems.
Leaving water setpoint changes?,impeller changes?Charge adjustments.
RTAA's and YS's--------------Thanx all.