Heating system air in pump

[Richard Kestell]

hello
I have to bleed my central heating pump everyday (1year old) as it makes a noise and stops the boiler from firing up. The central heating is off at the mo, but the hot water is on. Does anyone know why this might be and why is it only the pump being bleed fixes the issue temporarily.... I bought a bottle air valve, but am now now sure this will sort the issue or where to fit it. Please help. Thanks Rich

 

[oldbuffer]

Sealed system or open vent (with small feed and expansion tank in loft)?
What type of boiler, make, model, combi, system or open vent?
What pump, and how is it mounted (photo would be useful)?
Air clearly getting into system, but where from may be different depending on type of system.

 

[Richard Kestell]

Yes tank in loft. Boiler firebird kitchen series oil fired. Grunfoss pump mounted upstairs in bathroom airing cupboard. Photos attached, thanks

 

[HERTS P&D]

Why is the feed capped off?

Pump sucking air from vent?

Who has worked on this system last and when?

Andy

 

[Richard Kestell]

This is how it's been since we moved in 5 years ago. Nothing other than a new pump fitted, by me,

 

[ianmcd]

your pics are not very clear, normally zone valves are installed on the flow pipework, if yours are then you have installed your pump upside down as it is pumping away from the zone valves.

 

[Richard Kestell]

I replaced the pump the same direction as the one that came off. And the air in pump problem has only been happening for the last six months. I thought it might be one of the zine valves as the boiler kicks in every so often when nothing is on, making me think the valves are asking for heat. But am not sure.