zonal heating

[ip26150]

on a job where the main circulatory seems fine on three zones ,but the single problem zone ,which i am working
on ! ,goes from the cellar (boiler situ) up to first floor up 4.8m ,then down 2.4m .
the 4 radiators here are tardy in heating up and do not seem to get as hot as rest ,
i am thinking i would like to fit a booster pump just on this zone at first floor level ,
could someone advise me on pump choice

 

[PlumbBobBob]

would balancing help? oh and welcome to the forums.

 

[Roger Welton]

Are they slow even with just the one zone heating? Is there a bypass, if auto what is it set at?

 

[ip26150]

have tried to balance the radiators ,running the single zone ,but though better still not right ,
flow seems reluctant ,to go up the 4.8m ,then down 2.4m ,then return up 2.4m ,on the return ,
before the return drops back the 4.8m ,
know its a different situ ,but discharge pumps ,will only go so far vertically ,then if you put a
horizontal run in ,they refuse to go any further vertically ,
really do appreciate your input as need to rethink this problem ,so i can relax and concentrate on
my planned drinking and gambling normal saturday

 

[Roger Welton]

Whats the total amount of heat you need to flow, and pipework resistance for the run also what pump is currently fitted?

 

[zzzjim]

Is this an older install ,
has the slower leg acted as a place for sludge to gather ?

( ie a clean and a re-balance )

 

[PlumbBobBob]

what about partially repiping so the pipes only have to go up 2.4m not 4.8m and then do the same for the return.