central heating pump

[blozinge]

I have just replaced my central heating pump. Unfortunately, although i'm sure i have the pump fitted in the right direction, i am getting a lot of hot water flowing into the header tank. I have got the pump on the lowest setting (1)and have attempted to balance the rads but to no avail. Any ideas? Thanks

 

[masona]

Was it doing this before ? and are the pump valves open ?

 

[blozinge]

I fitted new isolator valves above and below the new pump and they are open.

I wasn't aware that there was a problem with a backflow into the header tank before i changed the pump.

I changed the pump because it wasn't making a terrible noise and on inspection was full of sludge.

Another problem i have had is the boiler firing up outside the programmed times.

 

[oilman]

Try turning the pump round.

What sort of boiler?

What sort of programmer?

 

[blozinge]

Potterton profile 80e. 12 years old, noisy.

Programmer is an acl 'lifestyle'

Pump arrow is pointing in the same direction as the old one was

 

[oilman]

If water is still pumping into the tank, it sounds like you have a blockage in the pipes. This is most often where the feed pipe from the tank meets the circulating pipes, or very near it, and up the feed pipe.