Pump Over run?

[mattylad]

Hello, I have seen this mentioned several times as a possible fault with peoples boilers, however I cannot find any reference to it in the WIKI/FAQ

Could someone please explain what it is, what causes it & what the effect of it is please?

BTW, I have tried using the forum search but despite there being a thread with Agile using the exact phrase "pump over run" the search does not find it.


Cheers,
Mattylad.

 

[Dan Robinson]

Pump over run is where the boiler spins the pump to disperse excess heat.

It could be based on a timer or a thermostat and requires the pump to be wired directly into the boiler.

It stops low water content boilers from over heating and scaling up.

 

[mogget]

The search hasn't been finding anything at all for me today.

Your search - pipe - did not match any documents.

Now I don't believe that for a second!

 

[mattylad]

Cheers Mogget, so it's not jus me searching then.
perhaps I'll try searching here via google instead.

Dan, so your saying that pump over run is a good thing? designed into the boiler to keep hot water going round the system after the boiler has stopped firing?

My Worcester 9.24BF seems to do this.

So I'm puzzled by what Tony means in this thread, as if it's a fault?

 

[Dan Robinson]

I think he means checking to see if the pump is over-running like it should, 'cos if it doesn't the boiler might trip out.

But I am not reading the whole thread.