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Nest heatlink into Ideal c30 boiler

Discussion in 'Electrics UK' started by RugbyRich, 17 Nov 2019.

  1. RugbyRich

    RugbyRich

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    Hi
    We have just had a new boiler installed but the Nest is not working. I don't think its been wired in correctly. Please could someone check the pictures uploaded and let me know.

    Thanks in advance for any help. 20191116_130540.jpg 20191116_124232.jpg
     
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  3. flameport

    flameport

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    Wrong in several ways.

    To do properly you will need some 5 core flex, or another piece of 3 core.
     
  4. RugbyRich

    RugbyRich

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    Ok. I can get this. Please could you help with what needs to be done. We will be using the Nest thermo via a stand and not mounted on wall.
     
  5. flameport

    flameport

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    With 5 core flex between the Nest heatlink and the boiler:

    Colour - Boiler - Nest Heatlink

    Green/Yellow: Boiler earth - Nest earth
    Brown: Boiler L - Nest L
    Blue: Boiler N - Nest N
    Black - Boiler Room Stat - Nest 2
    Grey - Boiler Room Stat - Nest 3

    Doesn't matter which way round the wires at the boiler room stat terminals are.

    If using 3 core flex, then the existing 3 core is for E-L-N as above, then another separate piece of 3 core flex is
    Green/Yellow: Boiler earth - Nest earth
    Blue- Boiler Room Stat - Nest 2
    Brown - Boiler Room Stat - Nest 3

    However if the existing mess was installed by someone you paid, then they should be the ones installing it properly, or you need a refund from them.
     
  6. RugbyRich

    RugbyRich

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    Your a star! I will do this myself as I don't trust they will do properly. I'm already trying to get a refund for other stuff. I should have guessed when he pulled up on a horse!
     
  7. RugbyRich

    RugbyRich

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    All working, Thanks again for your help!
     
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