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Wiring Nest Heat Link to Vaillant Ecotec Pro 28 (duplicates merged)

Discussion in 'Plumbing and Central Heating' started by Krzysztof UK, 17 Oct 2020.

  1. Krzysztof UK

    Krzysztof UK

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    • please do not duplicate your posts
    Hi All,
    I have got question on installation Nest Heat link to boiler. I have got Vaillant Ecotec Pro28. I currently have Honeywell thermostat and receiver (wiring) has been shown on picture attached. Should I do exactly the same as on the picture above ie:
    N to N
    L to L
    With yellow/ green cable going to 3
    And loop done between L and 2?
    Please advise.

    kind regards

    krzysztof
     

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  2. muggles

    muggles

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    L to L
    Link L to 2
    N to N
    A to 2
    B to 3
     
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  4. Krzysztof UK

    Krzysztof UK

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    Hi Muggles,

    Thank you for your reply.
    Am I right saying that A and B I can find in boiler control/board itself therefore need different cable to connect to boiler?

    Many thanks for your help.
     
  5. Chris_W

    Chris_W

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    Is this current receiver wired into the boiler already? If so, then just transfer wiring as per Muggles.
     
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  7. muggles

    muggles

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    No, you should not access your boiler's electrics. They are behind the room sealing cover which should only be removed by a Gas Safe Registered Engineer. You just transfer the existing wires in the Honeywell receiver to the Nest Heat Link as I've described
     
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