Just had oil boiler replaced...

[omits]

Then discovered the HWT leaks! Had to drain system and fit. BUT on refilling there are so many air locks. Crap original work to say the least! Thing is the pump bleed gives off steam sometimes and water but still not quite circulating the hot water through the HWT coil. Any suggestions welcome to claer the lock.

 

[Johntheo5]

Is it a sealed or open vented system?

 

[Exedon]

As above plus some clear pictures of pipework to boiler and pump .

 

[omits]

As above plus some clear pictures of pipework to boiler and pump .

Open system. Pics as follows:
boiler 1 is the new SS indirect cylinder.
boiler 2 shows pump and diverter. Pump is lowest setting. Pipe going down from T to diverter goes to I think a pressure relief valve (plumber who fitted tank says it is not needed).
boiler 3 shows plastic pipe and (on left poking up from floor and going off left) the copper return/flow from boiler.
boiler 4 shows pipes from loft (feeder and overflow) and 22mm pipe from diverter to tank coil.
Not a great set but spaghetti junction for sure. Managed to get tank hot now but rads seem to have air as some cold. I am trying to turn them all off then turn on one cold one in attempt to force air through. Other suggestions welcome. Many thanks.

 

[Johntheo5]

Maybe drain the lot, tie up the ballcock, open the mid position valve manually, drain down the syatem then connect a mains hose onto the boiler drain and refill the system slowly from the bottom up?.

 

[Exedon]

I would certainly try pump on a higher setting to try to clear air .
Cylinder stat is a bit low.