Your browser isn't supported
It looks like you're using an old web browser. To get the most out of the site and to ensure guides display correctly, we suggest upgrading your browser now. Download the latest:

Welcome to the MSE Forums

We're home to a fantastic community of MoneySavers but anyone can post. Please exercise caution & report spam, illegal, offensive or libellous posts/messages: click "report" or email forumteam@. Skimlinks & other affiliated links are turned on

Search
  • FIRST POST
    • Dancaw
    • By Dancaw 20th Apr 17, 9:30 PM
    • 7Posts
    • 0Thanks
    Dancaw
    Connecting Nest Heat Link to Combi Boiler
    • #1
    • 20th Apr 17, 9:30 PM
    Connecting Nest Heat Link to Combi Boiler 20th Apr 17 at 9:30 PM
    Hi Im Looking for some advise, i've tried everything else, and i dont really want to spend £100 and wait 7 days for some one to come along and connect 1 or 2 cables.

    I Have the Latest 3rd Gen Nest and i've wired the heat Link side up as instruction.

    L to L (Live on Boiler Circuit Board which originally fed the DIEHL Typ 884 -1k) Timer Built in)
    L to Common (2) on Nest (Link)
    N to N (Natural on Boiler Circuit Board which originally fed the DIEHL Typ 884 -1k) Timer Built in)

    The Bit i can't get my head around is

    Point 3 on Heat Link which goes back to boiler (Heat Call Cable), i've found the Thermostat and Programmer points (2 connections) on boiler circuit board which is 72 Room thermostat and 139 Remote Timer, and they go back to the DIEHL Typ 884 to points 3 & 5 but i dont know if 72 goes to 3 and 139 goes 5 and theres to points and i only have one from NEST

    so you see my delima

    if any one could help much appreciated my Boiler is a Ferroli F24 B

    Regards

    Dan Cawthorne
Page 1
    • Alex1983
    • By Alex1983 20th Apr 17, 9:42 PM
    • 312 Posts
    • 165 Thanks
    Alex1983
    • #2
    • 20th Apr 17, 9:42 PM
    • #2
    • 20th Apr 17, 9:42 PM
    Do you have a room stat already, if not there will be link fitted at the boiler which will be the room stat connection. Take out link and run a cable from there to your nest common and calling. If the link is inside the boiler then you need to get a gas safe guy to do it
    • Dancaw
    • By Dancaw 20th Apr 17, 9:55 PM
    • 7 Posts
    • 0 Thanks
    Dancaw
    • #3
    • 20th Apr 17, 9:55 PM
    • #3
    • 20th Apr 17, 9:55 PM
    Hi Alex

    Thanks for the Prompt response,

    No i dont have any Stats or external Programmers. Do i need to disconnect the DIEHL Programmer at all?
    • Alex1983
    • By Alex1983 20th Apr 17, 10:06 PM
    • 312 Posts
    • 165 Thanks
    Alex1983
    • #4
    • 20th Apr 17, 10:06 PM
    • #4
    • 20th Apr 17, 10:06 PM
    No leave it and set it to on 24/7 and wire nest into room stat connections, there will be a link there at the moment
    • Dancaw
    • By Dancaw 20th Apr 17, 10:29 PM
    • 7 Posts
    • 0 Thanks
    Dancaw
    • #5
    • 20th Apr 17, 10:29 PM
    • #5
    • 20th Apr 17, 10:29 PM
    Cant see anything on the circuit, maybe i'm missing something.

    I've taken some images if you can spot anything : you meed to add the www as I'm not allowed to post links yet

    imgur.com/a/TfUSN
    • Le_Kirk
    • By Le_Kirk 21st Apr 17, 10:11 AM
    • 1,880 Posts
    • 943 Thanks
    Le_Kirk
    • #6
    • 21st Apr 17, 10:11 AM
    • #6
    • 21st Apr 17, 10:11 AM
    Use this link and go to page 44, there you will see the circuit diagram showing the connection for the room stat as item 72 with connections 3 and 4 or a link.
    • Alex1983
    • By Alex1983 21st Apr 17, 11:07 AM
    • 312 Posts
    • 165 Thanks
    Alex1983
    • #7
    • 21st Apr 17, 11:07 AM
    • #7
    • 21st Apr 17, 11:07 AM
    Looking at the picture it looks like the timer has been wired into the link. Put common and calling from nest into the the connector block where the timer goes.
    • Dancaw
    • By Dancaw 21st Apr 17, 12:22 PM
    • 7 Posts
    • 0 Thanks
    Dancaw
    • #8
    • 21st Apr 17, 12:22 PM
    • #8
    • 21st Apr 17, 12:22 PM
    I thought as Much,

    So do i still need to link the Common at the Nest?

    and would i need to link the Remote Timer and Thermostat link at the Block? (at Boiler)

    or Straight Connection Nest Point 3 to Thermostat, Common to Remote Timer
    • Alex1983
    • By Alex1983 21st Apr 17, 1:30 PM
    • 312 Posts
    • 165 Thanks
    Alex1983
    • #9
    • 21st Apr 17, 1:30 PM
    • #9
    • 21st Apr 17, 1:30 PM
    Not sure what you've done to the rest of the wiring but the simplest way is to run 2 cables from the connecter block where the timer is wired to (remove 2 timer cables) - to the nest and connect them to the nest common and calling.
    • Dancaw
    • By Dancaw 21st Apr 17, 1:59 PM
    • 7 Posts
    • 0 Thanks
    Dancaw
    I think Ive Done it, Really Simple - I was over complicating it i think

    Nest Thermostate Connected Wirlesely to the Heat Link Successfully and talking to each other.

    Power On

    Contact 47 on boiler (ThermostatCall) Connected Contact 3 on Nest

    Contact 139 on Boiler (Remote Controller) Connected to Contact 2 on Nest (Common)

    I have to leave boiler on now. and when i turn up the Nest Thermostate, i can hear clicking on Heat Link and Boiler firing up.

    I Assume its that simple?
Welcome to our new Forum!

Our aim is to save you money quickly and easily. We hope you like it!

Forum Team Contact us

Live Stats

2,664Posts Today

7,442Users online

Martin's Twitter
  • Byebye! I'm about to stop work & twitter, to instead spend glorious time with Mrs & mini MSE. Wishing u a lovely summer. See u in 10 days.

  • WARNING Did you start Uni in or after 2012? The interest's rising to 6.1%; yet it doesnt work like you think. See https://t.co/IQ8f0Vyetu RT

  • RT @JanaBeee: @MartinSLewis Boris is the anomaly (coffee), the others are versions of normal (beer). Lots of same candidates = vote share d?

  • Follow Martin