N
napalm1967
Have fitted new gravity cylinder to old oil fired potterton boiler 15 years old approx.it has 1inch coil inside to match old.the old cylinder was repalced as leaking at seam.There was a pump added to the primary which was removed when fitting new cylinder as I was told this made no difference to the orignal fault which was cylinder not heating up hot water but heating ok.The heating system is an old one pipe system with a mixture of pipe material LCS/copper the flow and returns are 2inch 20 rads of which some are old collum type.the heating is pumped
There is plenty of heat on the primary flow out of the boiler but it will not circulate and flow back to the boiler.
I have made sure there is no air in the coil,there are a few bends on the flow before it enters cylinder which may restrict flow a little but i dont think it would be enough to stop circulation.
the pump that was fitted before is a concern??
Would renew whole system if they had the budget!!!
I would be gratefull for any thoughts
There is plenty of heat on the primary flow out of the boiler but it will not circulate and flow back to the boiler.
I have made sure there is no air in the coil,there are a few bends on the flow before it enters cylinder which may restrict flow a little but i dont think it would be enough to stop circulation.
the pump that was fitted before is a concern??
Would renew whole system if they had the budget!!!
I would be gratefull for any thoughts