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Connecting UFH to Combi Boiler

Discussion in 'Plumbing and Central Heating' started by matthew tubbs, 6 Mar 2017.

  1. matthew tubbs

    matthew tubbs

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    I am currently connecting my UFH system to my combi boiler (Worcester Bosch 42CDI).

    I will T off from the existing radiator flow and put in a 2 port motorised zone valve on the rad flow, will I need a 2 port zone valve on the UFH circuit?

    I cant ever see a situation when my UFH will not be switched on if my radiators are.

    If I connected it like this would I still need an auto bypass valve?
     
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  3. Agile

    Agile

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    What temperatures are you planning to run your UFH at?

    Tony
     
  4. DP

    DP

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    Y
    Yes, put the bypass in. If not needed, it can be set to max setting
    You will need two two port valves. I have done it with a three port
     
  5. Steelmasons

    Steelmasons

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    UFH circuit will require a longer heat up period (set back) as opposed to the heat emitters.
     
  6. Read this article.
     
  7. matthew tubbs

    matthew tubbs

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    Thanks all. I am hoping to run the floor about 40 degrees, but I guess only time will tell.

    I did think about using a 3 port valve but the company who installed my UFH left me with a 2 port valve anyway so thought I might as well just by another and plumb it like s-plan.
     
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