combi boiler--dhw return
Posted: Sun Sep 07, 2008 3:12 pm
by james woodland
I have a 35meter pumped D.H.W run, I installed a return but there is no connection to the floor standing combi boiler, can I drop it into the c/f (mains)
many thanks james
Posted: Tue Sep 09, 2008 6:44 pm
by htg engineer
Combi boiler with pumped hot water ?
Water should not be pumped directly from the mains, you can only pump water from a storage tank.
'I installed a return but there is no connection to the floor standing combi boiler'
So where does the return go to now ?
Why do you think you need/want a return ? the pump will only come on when the tap is opened, so should only pump the water used.
The only reason to fit a pump with a return is if you have a continuous loop, where each feed to a tap is tee'd into the main distribution pipe, used in hospitals where there's long runs and you need instant hot water, not long lags of cold water.
htg