Controling Upstairs & Downstairs Heating

[salem2000]

We have a Halstead Ace High Combi. What I would like to know is whether or not its possible to control the upstairs rads independantly from the downstairs ones. We have a room stat downstairs and thermo valves on all, rads barr one in bathroom. Thought about control valve on feed to upstairs, but need advice. It gets a lot hotter up than downstairs. Thanks.

 

[taydo]

You could zone it with a 2 port valve and stat depending on how the water circuit runs. If you do, you will need to fit a BYEPASS VALVE near the boiler, as your existing byepass sounds like its the rad upstairs.

By far the easier option would be to turn the trvs down

 

[salem2000]

22mm from boiler "T" flow to & downstairs, "T" return via same route. The house was a bungi, now converted loft with 3 bed & bath (bypass in bath) up, old downstairs bath to be utility/WC. (rad not yet fitted so bypass could be fitted if req)

Have tried to turn the TRV's down, but heat from downstairs rises to the gallery at top of stairs and over heats upstairs. Any other soloutions would be a great help.

As the heat rises and it cools down on the lower level, the heating kicks in and so the cycle begins again, and before anyone says anything. I know its supposed to do that.