Air Air Air changed pump bled system??

[Olga]

Few weeks back I awoke to no hot water, I have a baxi 24 HE on an open system, boiler had tripped so reset next day same thing few days later I had a look and realised the pump had stopped, so bought a new pump, changed it and up and running but the system sounds like it is full of air wooshing around, banging and tripping the boiler constantly, sometimes It might last for 2 days. I have checked the F&E tank and you can see the water coming in as it expands but it is just luke warm not hot, i have a drip from an overflow but both tanks levels look OK, bleeding highest rads everyday to clear air. I am now very confusedto the cause, any suggestions?

 

[jtsplumbing]

Hi Olga, maybe something as simple has the pump is pumping the wrong way, look on side of pump you will see a arrow showing direction of flow.

 

[king of pipes]

The pump is back to front and pumping the wrong way ? That would be your first thing to check . kop

 

[king of pipes]

Spooky posted exactly the same time Jt

 

[jtsplumbing]

Spooky posted exactly the same time Jt

OOOOOOOOOOOOO !

 

[Olga]

Dont think so, it was a grundfos alpha just a like for like swop out, only goes one way as far as i know, after reading a little it may be pointing towards hot tank coil perforated maybe??

 

[jtsplumbing]

Dont think so, it was a grundfos alpha just a like for like swop out, only goes one way as far as i know, after reading a little it may be pointing towards hot tank coil perforated maybe??

Yes only pumps in one direction ! but have you fitted it facing the right way ? that is why the pump has an arrow on it < >

 

[Olga]

these pumps have a power plug underneath and an electronic switch unlike the old fashioned grundfos pumps, hard to get wrong.

 

[Stigster]

these pumps have a power plug underneath and an electronic switch unlike the old fashioned grundfos pumps, hard to get wrong.

The thing is the head of the pump is reversible depending upon which direction you want it to pump. The important bit is that the arrow on the pump body is pointing the correct way.

 

[Stigster]

Have a look at this document Section 5.
http://net.grundfos.com/doc/webnet/poweredby/gpu/pdf/Alpha_IO.pdf