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Discuss Saying hi! And asking my first question! in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. MJB5373

    MJB5373 New Member

    Rob Foster told me about this forum, so here I am! I’m a capable all rounder with regards DIY. Worked on L60 engines for my sins so will have a go at most things. Signed up today, so Hi and thanks for having me!

    I’ve got a quick question that might sound barmy but here goes... I’ve got a WB 35cdi Classic plus polypipe UFH wet system. Both are connected separately via two Nest Therms.

    Here’s the question: should the UFH be able to fire up the boiler independently? Currently only works if I set the boiler to heat the rest of the house?

    Cheers for any help you can give, Mark
     
  2. king of pipes

    king of pipes Trusted Plumber GSR

    You should indeed be able to set each heating circuit nest thermostat individually Shaun Corbs is you man for wiring issues welcome to the Forum . Kop
     
    • Like Like x 1
  3. MJB5373

    MJB5373 New Member

    Many thanks - best get the plumber or spark back, Cheers again
     
  4. scott_d

    scott_d Plumber GSR Top Contributor!!

    Do you have zone valves?
    Blending valve on the ufh?
     
    • Like Like x 1
  5. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    hello and welcome

    sounds like its not separated with port valves (s plan the system)
     
    • Like Like x 1
  6. MJB5373

    MJB5373 New Member

    Hi both, how can I help you, help me more? Send photos?
     
  7. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    yes please boiler and below if theres pipework there also ufh manifold pics
     
    • Like Like x 1
  8. king of pipes

    king of pipes Trusted Plumber GSR

    Probably best to post a picture of your set up . Kop
     
  9. MJB5373

    MJB5373 New Member

    Here’s the photos on my system. The Nest Heatlinks go into a junction box, which is pretty busy. The bottom heat link works just dandy and fires the boiler. The top one operates as it should but doesn’t call for fire; I think the wiring isn’t right I think? Would it help if I took the heat link cover off and photo them too? Thanks again

    F5142577-14C6-4085-8FAA-6C3331B5C9D5.jpeg

    F9826CD1-CFCD-42BD-9F9A-FDF891C63504.jpeg

    31CEC888-4A36-4041-B5B7-221D0CEAFA85.jpeg
     
  10. king of pipes

    king of pipes Trusted Plumber GSR

    At a guess it is a wiring issue, if one of those zone valves goes to the under floor heating ? you have everything you need there to work each circuit separately. Shaun should be able to help you out with a diagram . Regards kop
     
    • Like Like x 1
  11. MJB5373

    MJB5373 New Member

    Fantastic! Thanks for the input, much appreciated
     
    • Like Like x 1
  12. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Wired wrong or bad port valve out of the box

    upload_2019-5-27_11-20-8.png

    Ignore the hw marking on the second port valve

    That’s just for your heating side
     
    • Like Like x 1
  13. MJB5373

    MJB5373 New Member

    Thanks Shaun, can’t view that attachment for some reason?
     
  14. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Now?

    7A3767D0-0D17-4768-BA14-FE8307DDAD62.png
     
  15. MJB5373

    MJB5373 New Member

    Thanks for that Shaun...I’ve attached photos of the nest heatlinks just in case something totally crazy to view. The junction box is like spaghetti junction so pointless. I’ll put that diagram in front of the plumber as soon as he rings me, let me sort it out. Thanks again for your support! Very grateful

    A9A6AA95-8349-42DE-8486-5859571DA73C.jpeg

    682F677B-F1B0-4C05-AEF0-F16FB3C7530C.jpeg
     
    • Like Like x 1
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