Originally Posted by November
This is similar to what I am planning to do on my new system. Instead of getting a separate PID, when I am ready to cool, I plan on just unplugging the MLT rtd from the control panel and plugging in the rtd from the chiller to the control panel. Later I might add a temp display rather than a PID since it will just be a readout and not actually control anything. I figure it will be easier to watch a digital display then keep checking something down low where my chiller is.
Well there a pros and cons to both ways. If you've got the temp display on your panel, you'll still need to be going down there to adjust the output to get the right temp you want. You'll then be straining yourself to see the temp display up on your panel and adjust the valve at the same time. With time and consistent tap water temps, you might be able to dial in a location on your valve though.
May something to control the flow speed on the panel? Potentiometer?