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Nest Vaillant thermocompact vu gb 282

Discussion in 'Plumbing and Central Heating' started by evoandy2, 20 Jan 2019.

  1. evoandy2

    evoandy2

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    Hello looking for help i have a y plan and guess link from boiler 4 to heatlink 3 and boiler 3 heatlink 2 y plan wired like diagram but pump is in boiler not stand alone.

    so my question is where do i connect zone valve orange wire as guess boiler is wired to 3 amp spur feed permanently and not to pin 8 feeding orange wire zone valve and pin 3 on heatlink is a switched live

    Have tried to wire as shown but only get hot water if connect zone valve to live or switched live

    Thanks
     

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  2. picasso

    picasso

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    3 on the boiler pcb is the permanent live to the nest, 5 is the neutral and 4 is the switched live where the orange from the zone valve connects.
     
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  4. evoandy2

    evoandy2

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    ok thanks do i need to take neutral from 5 as at min takes off spur not 5 which has no connection
    will give it a go tomorrow
    thanks
     
  5. picasso

    picasso

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    No it does not matter if you take it from the spur, usually just makes it neater if the live, neutral,earth and switched live are in one cable.
     
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  7. evoandy2

    evoandy2

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    up and running thank you
     
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