Pump not pumping in the same direction as the flow arrow

[googledtodeath]

Hi all,

I had turned my CH pump down from setting 3 to setting 2 a while ago in an attempt to make life a bit quieter. It did the trick.

However, when it is set to setting 3 it rotates in the correct direction, when on either 2 or 1 it rotates in the wrong direction.

The heating is back on setting 3 and the house is warming up nicely now but the pump is sucking in air on this high setting (it is also fitted pumping down).

I am sure this is an obvious fault, am I right?

I just need to know that not all my marbles have been lost.

fyi. The pump is a grundfos multihead G. It is not a sealed system.

 

[Dan Robinson]

Is it magic mushroom season already?

 

[oldbuffer]

I'd love to know how you know its pumping in the wrong direction!

If it really is rotating in opposite directions for speeds 1 and 2 versus speed 3 then I'd:

a. Phone Grundfos and ask for their advice.
b. Take it out, put it in the other way round, set it to speed 2 and put tape over the speed control knob.

 

[longdogs]

That's a new one on me. I was about to suggest that it was wired incorrectly but not if its swinging both ways so to speak

 

[Dan Robinson]

Even if it was rotating the wrong way, the circulation would be in the same direction, only less efficient.

Unless the OP has been unwittingly sent Grundfos' top secret experimental Centripetal pump .