How to Maintain Minimum Pump Flow In HVAC Applications
/
Hydronic HVAC systems must maintain at least a minimum flow through centrifugal pumps, otherwise the pumps….
Read More
How to Determine Control Head for a Variable Speed Pumping System
/
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 MoreMaking the Switch to Variable Speed Area Control with DP Sensor(s)
/
What is the one piece of hardware in a hydronic system that distinguishes Variable Speed Curve Control from Variable Speed Area Control?...
Read MoreMr. Creep and the Undermining of Variable Speed Curve Control
/
We call him Mr. Creep.
Mr. Creep is not an actual person but rather a phenomenon of an ever-increasing control head in a variable speed pumping system caused by frequent incidents of underflowing coils, the result of which is progressive increases in operating cost and potential non-compliance....
Read MoreFundamentals of Differential Pressure Sensored Control in Variable Speed Pumping
/
What happens when demand drops in a closed loop variable speed system? What is the operational sequence and what logic does the controller use to vary the speed of the pump? Let’s begin our discussion with the following...
Read More