Worcester Greenstar 24ri - Possible airlock?

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Discuss Worcester Greenstar 24ri - Possible airlock? in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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JE-P&H said:
I Quote them as optional customer opted out, not my choice but what can you do!
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just thinking saves you draining down if you did

would put some lockshield gate valves instead of lever valves
 
Ye it's typical majority of installs have a filter but not this one! Didn't think of lockshield gate valves good alternative thanks!
 
Still no luck, drained everything including the boiler installed 2 AAV above the boiler shut off a valve each side and tried to pull an air lock through any other suggestions?
 
Are you getting just water out ? Or nothing

If your getting water could be pump
 
Just water, I have now changed the pump still the same have also swapped Flow and Return round above the boiler temporarily to see if that does anything and no luck! Baffling me system was quite old fully pumped system before but had no motorised valves etc just a Damfoss mixing valve controlling the hot water temperature anything I could have missed?
 
Photo of pipework before I took cylinder out if that helps!

I have labelled them left to right as they come out of the floor Boiler flow, Boiler Return, CH Return and CH Flow anyone disagree?

IMG_3421.JPG
 
I would say Flow? From the picture above it pumps to the cylinder and is on the flow pipe into cylinder?
 
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