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Replace current thermostat for nest 3rd generation. Wiring question

Discussion in 'Plumbing and Central Heating' started by Ifraz Alam, 4 Dec 2019.

  1. Ifraz Alam

    Ifraz Alam

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    upload_2019-12-4_18-45-22.jpeg

    How would I connect the current wiring to a nest 3rd gen heat link?

    thanks for your help!
     
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  3. ericmark

    ericmark

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    To make it work, brown to L with a link to 2, green/yellow to 3, blue to N. Also if powering from heat link from T1 and T2 to thermostat.

    However this may work, but it is not correct.
    Green/yellow should not be used for line wires,
    Also there may well be a wiring centre which it should be wired from to be able to control domestic hot water.
     
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  4. Ifraz Alam

    Ifraz Alam

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    Thanks for your reply and help. Much appreciated. Can you please elaborate on why the green yellow wire shouldn’t be used as line wire?
     
  5. Chris_W

    Chris_W

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    Usually used as earth wire, so someone who didn’t have a bit of a clue could harm themselves.
     
  6. fezster

    fezster

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    Put a brown/black sleeve over it to identify it correctly.
     
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  7. ianmcd

    ianmcd

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    very common to be wired like that, no it is not correct but very very common, I am guessing you have a combi boiler ?
     
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  8. Ifraz Alam

    Ifraz Alam

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    Yes
     
  9. ianmcd

    ianmcd

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    Thought you did so ignore what @ericmark says here , it does not apply to your setup
     
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  11. Ifraz Alam

    Ifraz Alam

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    Thanks
     
  12. Ifraz Alam

    Ifraz Alam

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    I have installed heat link and is able to switch on heating manually by pressing the button on the heat link but I cannot get it to connect to the thermostat. I have tried many times trying to reset heat link. No joy. The thermostat was literally next to the heat link but fails to connect anyone have any ideas?
    upload_2019-12-8_19-32-34.jpeg
     
    Last edited: 8 Dec 2019
  13. fezster

    fezster

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  14. Ifraz Alam

    Ifraz Alam

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    I have tried all that. Nextep was to phone customer service but as they are closed today I thought I would try on here. But thanks for the reply
     
  15. ericmark

    ericmark

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    So why not hard wire it?
     
  16. Ifraz Alam

    Ifraz Alam

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    I needed wireless I only brought it next to the heat link to try and connect but would normally be further away.
     
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