Grundfos CH circula...
 
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Grundfos CH circulation pump

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(@davidalgarve)
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405 kWhs
Joined: 5 months ago
Posts: 33
Topic starter  

I have a Grundfos UPM2 25-70 180 pump, circulating from a buffer tank with no means of checking or changing speed and I suspect the flow is not balanced to Ecodan.

There is no cable connected to what I suspect is the PWM 3 pin connector.

Could someone please advise on what is required to introduce PWM and thus vary the speed, possibly with speed indication

I am reasonably tech-savy but have no experience of PWM


   
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