Hi guys,
Was asked to look at friends heating yesterday, said some of the radiators weren't getting warm, thought a good flush out and balancing would get things sorted.
It's only 12 months old, boiler is a oil firebird I think (very oversized) combi
Flushed all the rads out, flushed all pipes with hose on each output, good flow to each trv / lockshield
Re filled, bleed radiators (opened trv, bleed, then closed, opened lockshield, bleed - making sure no air locks)
Balanced all the valves, turned all trv to 5, turned boiler back on, doh, still same problem.
Two rads very hot, others cold. Switched off all rads, leaving only one on that was cold, made no difference, still cold.
Two things I am thinking, the brighspark who fitted the boiler, flow is 22mm, but return is 15mm, guessing this isn't going to help ? it's reduced on the fitting on the boiler, think in the book is says the return is 1" - does that sound right.
My other thought ..... my friend, in his wisdom to save some money, did the pipework to the rads himself, all John Guest speedfit, I am wondering if he has put the rest of the rads on one side of the flow / two return, ie two flows / returns.
Water defiantly comes out of both pipes, so no blockages, can't think of any easy way to test the pipes to see if they are both on the same side ?
Everyone's help appreciated
Thanks, Paul
Was asked to look at friends heating yesterday, said some of the radiators weren't getting warm, thought a good flush out and balancing would get things sorted.
It's only 12 months old, boiler is a oil firebird I think (very oversized) combi
Flushed all the rads out, flushed all pipes with hose on each output, good flow to each trv / lockshield
Re filled, bleed radiators (opened trv, bleed, then closed, opened lockshield, bleed - making sure no air locks)
Balanced all the valves, turned all trv to 5, turned boiler back on, doh, still same problem.
Two rads very hot, others cold. Switched off all rads, leaving only one on that was cold, made no difference, still cold.
Two things I am thinking, the brighspark who fitted the boiler, flow is 22mm, but return is 15mm, guessing this isn't going to help ? it's reduced on the fitting on the boiler, think in the book is says the return is 1" - does that sound right.
My other thought ..... my friend, in his wisdom to save some money, did the pipework to the rads himself, all John Guest speedfit, I am wondering if he has put the rest of the rads on one side of the flow / two return, ie two flows / returns.
Water defiantly comes out of both pipes, so no blockages, can't think of any easy way to test the pipes to see if they are both on the same side ?
Everyone's help appreciated
Thanks, Paul
