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To control a variable speed pumping system, we must determine the minimum operational head of the system. Some refer to this value as constant head, minimum head, independent head, etc. Throughout this and in other JMP blogs, we refer to it as ...
Read MoreWe’ve talked about manual versus automatic balancing methods and we’ve talked about curve control versus area control. Now it’s time to consider the balance valve type impact on the pump control area. Let’s start this conversation with a question...
Read MoreIn our last blog, we showed you what happens in a variable speed system when load drops. For clarity, we chose an unrealistically simple example of a system with only one coil. Today we’re going to give our system a small dose of reality by incorporating multiple zones...
Read MoreWe are now three blogs into our series on Variable Speed Pump Control and we are going to hit the pause button and review some fundamentals. If sequentially that seems like a strange thing to do, there is a method to our madness...
Read MoreIn our last blog, we left you with two new terms, “Control Curve” and “Control Area,” indicating that any variable speed control strategy will be based on one or the other. What are these strategies and how do they differ? Before we pull out the curves, schematics and calculations, let’s start with a simple analogy...
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