1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Nest heatlink wiring

Discussion in 'Plumbing and Central Heating' started by leinster93, 1 Feb 2017.

  1. leinster93

    leinster93

    Joined:
    1 Feb 2017
    Messages:
    2
    Thanks Received:
    0
    Country:
    Ireland
    Hopefully someone can help me out to make sure I'm using the correct wiring diagram for the 3rd generation nest.

    Current setup - just a boiler, no thermostat.
    One zone - Boiler heats rads and water all in one.

    I have a condensing boiler with a live (black wire), a 2nd live (brown wire), a neutral (blue) and an earth. There is the 220 volt mains input brown, blue and earth.
    This is currently connected to an apt clock timer
    - 2 boiler live wires connected to live out on apt timer
    - main live connected to live in on apt timer
    - boiler and mains neutral wires connected to neutral on apt timer

    I am connecting the nest up to just be able to switch on the heat remotely. Nothing else.

    Based on the electrical diagram (combi boiler diagram attached)
    Is it correct to connect

    Mains live -> heatlink L
    Mains neutral -> heatlink N

    Boiler N -> heatlink N
    Boiler L -> heatlink 3

    Bridge a wire from heatlink L to heatlink 2

    Would really appreciate if someone could confirm if this is this correct.
     

    Attached Files:

  2. ericmark

    ericmark

    Joined:
    27 Jan 2008
    Messages:
    14,290
    Thanks Received:
    1,261
    Location:
    Llanfair Caereinion, Nr Welshpool
    Country:
    United Kingdom
    Boilers come with many ways to be controlled, without information on the boiler and how it is wired at the moment it would be all too easy to give wrong information.

    Has the boiler already got a thermostat or time clock, and what make and model is the boiler, given that you may get an answer.
     
  3. leinster93

    leinster93

    Joined:
    1 Feb 2017
    Messages:
    2
    Thanks Received:
    0
    Country:
    Ireland
    The boiler is a gloworm flexicom 24hx condensing boiler. There is an apt clock timer on it. 3 ports on apt timer
    Live in
    Live out
    Neutral

    Boiler live wires x 2 (brown and black) connected to Live out on apt timer
    Mains live connected to live in on apt timer
    Boiler neutral and mains neutral wire connected to apt neutral port of timer

    No thermostat existing at the moment
     
    Last edited: 1 Feb 2017
  4. stem

    stem

    Joined:
    20 Jul 2005
    Messages:
    5,472
    Thanks Received:
    1,092
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    If the APT is a separate item from the boiler, this will need removing as the Nest will control both time and temperature functions.

    You will then need to take the permanent live supply to the boilers N & L terminals respectively. This should also go to the N & L at the Nest Heatlink

    Heatlink terminal 3 goes to the boiler terminal R (Switched Live 230 Vac)

    Link the Heatlink terminals L and 2 together.

    If you want to power the Nest Thermostat from the Heatlink connect the T1 and T2 terminals on the Heatlink to the corresponding terminals at the Thermostat, otherwise you can power the Thermostat from a separate plug in power supply.
     
  5. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page