GRUNDFOS SCALA 2 PARTS DIAGRAM FULL

With other Grundfos products like the SQE, when the pressure transducer fails the pump reverts to cycling on and off as if it had a regular pressure switch. It doesn't sound like the variable speed part is working at all. I see where others who had that same problem added some air to the tank, and it seemed to help some. There is a lot of sales information on that pump, but very little on technical instructions. I am wondering if adding a pressure reducing valve to the supply side to keep the pressure at 40 (maybe even set it to 35) might resolve the issue? I do notice that sometimes my incoming pressure is 40, others its 45, sometimes even 50.

Could this be caused by fluctuating incoming pressure. Anyone know what it should be set to for incoming pressure of 40 and outgoing of 70?ģ. Could it be the internal pressure tank? It is precharged at the factory to 18.5 psi. Does anyone know what causes this issue?Ģ.

GRUNDFOS SCALA 2 PARTS DIAGRAM FULL

I have 10 more days to return it for a full refund, so if I cannot get it to work properly i will uninstall and perhaps go with a CSV type solution.ġ. But, I've got the SCALA2 installed and would like to try to make it work. I'll add that I have read the forums and understand there is some difference of opinion on VFDs and grundfos pumps. I've had 5 taps open at once all at 70psi, so when it works its pretty cool. I open another tap and it seamlessly keeps the pressure constant. I open a tap and it runs until the tap is closed. At other times, the thing runs like a champ.

Grundfos scala 2 parts diagram