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Google Nest Thermostat E

Discussion in 'Plumbing and Central Heating' started by Ben Rattigan, 20 Nov 2020.

  1. Ben Rattigan

    Ben Rattigan

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    I have a Siemens RAA02 and want to install Google Nest Thermostat E with Heatlink

    Can I replace the room thermostat it has wires in 1 and 2 and earth, or do I have to take out controller.

    Really not sure what either wires are for and where they go into Google Heatlink.

     
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  3. ianmcd

    ianmcd

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    you dont need the earth wire with the nest E but it has to be terminated safely, your timer will have to be set to constantly on and let the nest E over ride it, or disconnected and links put in
     
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  4. Ben Rattigan

    Ben Rattigan

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    Does it matter which way round the two wires from Siemens thermostat go into Google Heatlink?
     
  5. ianmcd

    ianmcd

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    It is not a heatlink, that is a different thing, nope the two wires go in to Com and NO on the nest E doesnt matter which way round it is simply a switch
     
  6. Ben Rattigan

    Ben Rattigan

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    Thanks, wasn't sure as followed instructions through but as wires are just numbered and Google instructions where asking for COM and No it was a bit confusing.
     
  7. ianmcd

    ianmcd

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    Not really you only have two wires to use and it doesnt matter how you connect them,nest will never advise colours as they mean absolutely nothing in a heating system
     
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  8. Ben Rattigan

    Ben Rattigan

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    Thank you everyone for help. It worked
     
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