Discuss Central heating pump sizing in the USA area at PlumbersForums.net
if a TRV shut back, wouldn’t the heat released from the associated radiator fall ?, or would the flow increase through the remaining radiators, if not wouldn‘t this result in an increased return temperature To the boiler ? If the TRV was fully open, then this would be the same as not having a TRV ???Yes, as long as the rads are controlled by TRVs, if not controlled by TRVs then reducing the flow temp is the only way to reduce the return temp.
Will certainly give that a try, Friday ....running 62C/52-55C/7-10C/5-6KW working well, heating cycles 2-3 times a day when the room stat is satisfied, Hot water heated at same time as heating is on, so not a problem so far. With the two lounge radiators increased from 2784 to 5439 BTUs ( based on 50oC DT, [although I realise mine are 40oC DT]) Each, hopefully will be enough to improve things next winter.Forgot that you have a "smart" circ pump so a much easier method of achieving your output of 5.3kw with reduced return temp.
Your present settings are flow/return/deltaT/Kw, 64C/59C/9C.
If you increase the flow temp to 67C, change from CC3 to CP3, observe the return temp, then change to CP2 and finally CP1, if the pump curves are as I think they are then you should/might get 67C/50C/17C. Downside is you would probably have to return to CC3 to enable the boiler to refire after shutdown. Maybe worth a try?.
Reply to Central heating pump sizing in the USA area at PlumbersForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.