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Wiring Hive on Worcester Bosch Greenstar 25 Si or 30 Si

Discussion in 'Plumbing and Central Heating' started by OviCS, 10 Jan 2017.

  1. OviCS

    OviCS

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  3. sajeel

    sajeel

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    great im sure will help others
     
  4. Neilscub

    Neilscub

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    So i wired my Greenstar 38CDi as per this diagram. Hive router, thermostat and receiver all connected. Says heating is off but Boiler is still firing. Any idea why?
     
  5. ianniann

    ianniann

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    Check if the switched live is live. The connection of any external controls to the boiler is really very simple - one wire is either live or not.

    If the switched live wire is live then the boiler is doing what is expected and either your wiring is weird or the Hive is turning it live for some reason.

    If that connection is not live then the boiler is firing for some other reason. Frost stat? 15-minute siphon fill after being off?
     
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  6. Neilscub

    Neilscub

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    Thanks Ian

    It's been on and off intermittently since I installed it a couple of hours ago. It's behaving normally when we demand hot water. Maybe it's some kind of feeling out process!?

    House is cooling down now - the schedule would aim to keep it above 20 degrees so we'll see!
     
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  7. sajeel

    sajeel

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    you could always call technical support to see if they had any issues with your type of setup
     
  8. Neilscub

    Neilscub

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    Ha!

    Contacted Hive Technical Support

    Said he didn't know too much about it and that was it!Hung up on me!

    Back to square one!
     
  9. stem

    stem

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    Has the link between the Lr and Ls boiler terminals been removed?
     
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  11. Neilscub

    Neilscub

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    Yes I removed the link
     
  12. lgb2100

    lgb2100

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  13. stem

    stem

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    If you have a timer that is integral to the boiler, then you can either:

    1. Simply set it so that the central heating to be permanently 'on' and the Hive will take over the control of time and temperature. Or.

    2. Remove the timer from the control circuit. There are several timer variants fitted to the Greenstar, but they usually have a ribbon cable behind them that is simply plugged in. If you look on the Worcester Bosch website, you can search for the installation instructions for the various timers, and you can check yours.

    https://www.worcester-bosch.co.uk/professional/support/documents

    If you want to physically remove the timer from the boiler, you will need a blanking plate to cover the space. Also, some WB boiler timers have a hot water pre-heat function. If your does, you may wish to retain the programmer for it, or alternatively you could use a dual channel Hive and use the hot water control channel.
     
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  14. Jason Puffett

    Jason Puffett

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    Any chance you have a diagram that includes the hot water control channel as well?
     
  15. Paul U

    Paul U

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    I found this wiring diagram most useful. Very clear and avoids the various different manufacturers technical speak for their different connections! Enabled me to wire in my Hive 1 very quickly...and most importantly...correctly!!! Thank you very much for posting.
     
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  16. Kevin Woolfe

    Kevin Woolfe

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    Thanks very much for posting the diagram. Have used it to install hive heating on a WB Greenstar 24i Junior Combi boiler - This is fitted with a DT20 twin channel Programmer. Hot water is working fine (set to "on") however, when I call for heat the boiler does not fire up! Any suggestions - I have read so much on here today...........Thanks very much in advance. Kev (the jumper has been removed between LS & LR)
     
  17. chancer22

    chancer22

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