The goal of a primary variable flow system is just like a variable air volume system: provide a constant temperature of supply air and let the pump/fan energy savings be realized without sacrificing comfort. If you start to reset temperatures, you will eliminate any transport energy savings and...
You can look this information up from Carrier's web page. I found information about Moduline equipment there. Good luck with retrofitting Moduline systems. My experience is that parts are hard to come by. Also, keep in mind that the Moduline system is "system powered" which means...
I have successfully designed primary variable flow chilled water system where the water flow rate through the chillers is varied and there is NO SECONDARY PUMPS. Current chiller controllers will allow you to do this and all chiller manufacturer's now allow this as long as the rate of flow...
Your LAT temperature variation may have nothing more to do with your chilled water system controls than your air handling unit controls. I have found that if the control valves are not properly sized for a sufficiently large pressure drop (yes, large pressure drop) that the water will short...
