Question: I am installing Magna 3’s throughout a school district and am not sure which of the control options to choose?
Answer: The control mode is based on the pumps application.
For example, for the boiler feed in primary-secondary piping, the control mode should be set to constant curve or constant pressure to maintain the flow. On the system side with two way valves, the factory default setting is AutoAdapt which is the preferred and most efficient setting. The pump will automatically adjust to the systems demands saving energy by not over-pumping the zones.
In short, below are the most common settings for multiple applications in a closed loop system:
Boiler Feed – Constant Curve or Constant Pressure
Air Handlers – AutoAdapt or Proportional Pressure
AC Coil – Proportional Pressure
Perimeter Radation – Constant Pressure or Differential Pressure
For technical support on your adjusting your E-Series pump to the correct setting, contact your local Grundfos rep agency.