Help with hydronic heating system

[JoJoey77]

Hi everyone - so glad I have come across this website!! I am hoping the brains-trust here can help me as I am having no luck (and running out of money and patience) with various tradies that promise the world, but cannot deliver!!

So.. I live off grid. I have a new nectre big baker wood heater with a wet-back to heat a water tank upstairs which has a pump to push water around the radiators to warm my house. Ever since the new heater was put in, I cannot get the tank to heat up properly, and consequently the radiators - they barely get warm. I've had a plumber make sure the pipes are in optimal positioning to ensure adequate thermosiphoning. The pump is working well. I've played around with the thermostat settings, as I am thinking this is where the issue lies, but really, I have no idea what I'm doing. Help!! Jo

 

[ericmark]

In the UK, heating and ventilation engineer is a degree status, and to get one to sort out domestic heating is very costly, so we tend to let plumbers do the work, and we have to face it, a plumber is a worker of lead, OK maybe not lead any more, but they are jacks of all trades, from roofing to pipe fitting, and the allied trades like electricians, see both some really good work, and also some horrors.

I am not prepared to play with PDF files, tried opening one, and it seems now stored on my laptop. But I have also had problems with the pipework layout, I suspect I have somewhere a by-pass valve which is passing, and I also suspect this is behind the plaster board fitted when the garage was converter into a flat.

All I can do is feel pipes, and see what gets hot. Since return pipes get hot, some where some how water is transferring from outlet to return without going through any radiator I can find.