Removal of Nest 3rd Generation from Vaillant ecofit pure

Discussion in 'Plumbing and Central Heating' started by Hav, 7 Feb 2019.

  1. Hav

    Hav

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    Hi all

    I’m moving home and have not included my Nest gen 3 so I need to remove it. I just want some clarification, I only need to remove the three wires as shown here which go to the nest link. Do I need to do anything else?

    I can't find anything on the net about removing it, probably because its the opposite of installing it, but its a different case here.


    [​IMG]

    [​IMG]

    Any help would be hugely appreciated.
     
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  3. PhillCO2

    PhillCO2

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    Correct, isolate and remove the brown, blue, and grey conductors to the nest. Bear in mind that the terminal X1 will still be live even if the boiler is off locally, there should be a switched fused spur somewhere adjacent to the boiler to isolate the supply.

    Unless the boiler originally had a local controller and you link this back it will obviously not function for central heating without a thermostat, you could put in a cheap basic thermostatic switch or just let the new occupants know they will need to resolve I guess.
     
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  4. Hav

    Hav

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    Amazing, thank you, thats all i needed to know!

    Boiler doesn't have a controller, but as I understand, the boiler has central heating 'buttons' that simply increase or decrease the temperature. Am I wrong in saying this? I don't want to leave the buyer without central heating (but then i'm not obliged to provide anything more either).
     
  5. ianmcd

    ianmcd

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    when you remove the nest you will have to put a link from live to RT on the boiler, or the heating wont come on
     
  6. Who told you that :?: The boiler installation would have been registered and compliant with the current regulations at installation date.

    Why not fit a basic £20 programmable thermostat in lieu of the nest,this will provide a time/temperature interlock. Better than nothing :cautious:
     
  7. Hav

    Hav

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    Thank you for the information, to confirm, you mean this:

    [​IMG]

    Who told me what? Boiler was installed 1 year ago, and the Nest 8 months ago, so do you mean I can't use the boiler to control the central heating or do you mean something else? Sorry im not sure what you mean here...
     
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  9. ianmcd

    ianmcd

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    He means that if you live in England or wales and you remove the Nest and dont fit a room thermostat the installation will not be compliant with building regs if you are in Scotland its OK to do that
     
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  10. gazplumber

    gazplumber

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    Are you taking the light bulbs when you move too?
     
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  11. Hav

    Hav

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    nice.
     
  12. vulcancontinental

    vulcancontinental

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    If it was a year ago Boiler Plus hadn't taken effect so Nest was not required to comply but the need for time and temperature control was in place a year ago unless Scotland doesn't require time and temp control. Having said that once it's been notified correctly until more notifiable work has been undertaken it's unlikely to be noticed.

    When did hot water and heating get so complicated?

    Tell the house purchasers how good you think Nest is and ask for some money, they're probably cheaper now anyway and get yourself a new one.
     
  13. ianmcd

    ianmcd

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    not required in Scotland david we dont have part L or Boiler Plus yet
     
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  14. vulcancontinental

    vulcancontinental

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    That's interesting Ian, thanks.

    I've been looking at things from a different perspective recently; a decent boiler at 90% plus, an additional annual heating efficiency improvement of 1% for a stat (cost say £60) another 1% for weather comp (cost say £60) another 1% for a modulating thermostat (cost say £100), another for weather comp plus a modulating thermostat (cost say £160) and another 1% for three linked modulating thermostats (cost say £300).

    if the annual heating bill is say £1000 that equals £10, £20, £30, £40 or £50 a year saving according to official figures and of course some of the heating controls will actually increase the heating bill albeit increasing overall comfort as well.
     
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  15. DIYnot Local

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