Grundfos UPM3 AUTO settings

[OldSpot]

I've got a Grundfos UPM3 AUTO 25 70 130 on an Ivar UFH manifold.

Just trying to work out why you wouldn't just run it in the "Constant Pressure Auto Adapt" mode as opposed to any of the other 3 Constant Pressure settings as this seems to cover all bases?

Or have I completely misunderstood!?

 

 

[John Carroll]

I have never seen any Grundfos Pump working properly in Auto Adapt mode, these had a Auto Adapt mode in PP (proportional pressure) only and generally appeared to run at the lowest PP head which circulated very little through the rads due to the very low head. UFH systems run with a fixed CP head and the loop flowrates are set up manually and are generally fixed, if there are a number of zoned UFH manifolds then the flowrates will probably change slightly depending on the number in service.

 

This is the UPM3 Auto.

 

[OldSpot]

Thanks for your reply John.

As you allude, there is a difference between PP and CP and the UPM3 AUTO has auto adapt for both.

I think in your answer you're talking about the PP not working properly not the CP auto adapt?