Hi That quote was not from me I definitely do not have any valves or a hot water cylinder.
Just looked it up again. It was in another contributor's explanation to you how he located a blockage.
puntaprimapete said:
I have been tinkering with the balancing again and have managed to get some heat to another rad.
What speed setting do you have the pump on? According to the Installation Manual it has to be on 3.
Is the return pipe to the boiler still cold?
If so do you have any idea what the temperature is?
What is the CH flow temperature set to?
Tinkering with balancing will get you nowhere; it has to be done methodically.
As Softus said in your previous topic, work out the layout of your system first. Then start at the rad nearest the pump and go in sequence along each branch.
puntaprimapete said:
I think that's about as far as it will go though because if I shut down the hot rads any further they just go cold.
I take it you are talking about closing the lockshield valve. Unfortunately, due to their design. most rad valves are only effective over about the first 25% of the range from fully closed to fully open. It's called "valve authority".
I also think you may not understand how balancing works. The more you shut down the lockshield valve on a radiator the slower the water will flow through the radiator and the higher will be the temperature difference between the flow and return pipes of the radiator and, consequently, the greater will be the heat output from the radiator. (The heat output from a radiator is proportional to the difference in temperature between flow and return.)
I suspect that you are closing down the lockshield valve thinking that this will make the radiator cooler. It will - when the valve is fully shut, as you have found. I suggest that you start from scratch by opening all lockshield and control valves on all radiators and then balance each radiator in turn
starting from the ones nearest the boiler
It would be worth reading
Balancing TRVs. Although it is about systems with TRVs, the instructions are relevant to all systems.