Discuss Worcester Greenstar 24ri - Possible airlock? in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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Where do you mean top of the coil? I don't think it's an air lock anymore I've put mains water through the system right up to the tank and still boiler flow doesn't even get hot heat exchanger just overheats.
O
Old Account
As @ShaunCorbs mentiond earlier it might be your pump itself. @Gasmk1 said you should put an AAV on top of the coil which means where the inlet to the coil is - basically close to the coil entrance. If there is no airlock anymore try getting another pump that's what I would to see if there is any difference.
This is turning into quite a mystery.
Neither of the following are likely, just trying to think outside the box:
Can you be sure that the coil in the cylinder is not blocked? Perhaps a manufacturing problem. Perhaps some bungs to stop debris getting in that needed to be removed...
I can't see from the photos, does the cylinder have a secondary return? Is it possible you connected to this and capped the primary return instead of vice versa.
Neither of the following are likely, just trying to think outside the box:
Can you be sure that the coil in the cylinder is not blocked? Perhaps a manufacturing problem. Perhaps some bungs to stop debris getting in that needed to be removed...
I can't see from the photos, does the cylinder have a secondary return? Is it possible you connected to this and capped the primary return instead of vice versa.
O
Old Account
Perhaps you mixed some pipes
If the coil was a blocked surely CH and bypass would still work so boiler would still fire?
No secondary return on the cylinder just your standard fittings, I didn't cap any pipes tee all the returns in together and used the CH Flow. Open to suggestions if I've mixed something up? I checked the installation instructions for the old damfoss mixer and return comes out the bottom as I expected.
It also now has a new pump on no change!
Got Worcester coming tomorrow to check the boiler to rule that out, took the flow and return off and blew through to ensure no blockage etc. All clear!
No secondary return on the cylinder just your standard fittings, I didn't cap any pipes tee all the returns in together and used the CH Flow. Open to suggestions if I've mixed something up? I checked the installation instructions for the old damfoss mixer and return comes out the bottom as I expected.
It also now has a new pump on no change!
Got Worcester coming tomorrow to check the boiler to rule that out, took the flow and return off and blew through to ensure no blockage etc. All clear!
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Have you opened port valves manually ?
Do you get any heat up to where the pump is ?
Do you get any heat up to where the pump is ?
Ye opened them manually, no heat and the pump heat doesn't get past the top of the boiler it basically boils itself in about 10-20secs then flow sensor cuts in! Takes a while to cool then same again!
O
Old Account
There is only one thing left the boiler itself. It would be quite weird if the boiler is ok.
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