Honeywell BDR91 to Hive

Discussion in 'Plumbing and Central Heating' started by DanielGray22, 27 Jan 2020.

  1. DanielGray22

    DanielGray22

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    Hey

    Currently have BDR91 receiver. I’ve been wiring the new hive system as instructed on the various forums. Having trouble connecting everything up. When power goes on the boiler starts up without being instructed too. Also when I instruct the boiler to turn off via the hive thermostat it doesn’t seem to do anything!

    I have a Worcester combi boiler so just using the single channel.
     
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  3. ianmcd

    ianmcd

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    post pics of how you have wired it , saves a lot of time
     
  4. DanielGray22

    DanielGray22

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    Just to clarify the grey is into terminal 1 and the brown is into terminal 3
     

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  5. ianmcd

    ianmcd

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    Thats fine what have you connected to at the boiler end ? did you completely disconnect the BDR 91 ?
     
  6. DanielGray22

    DanielGray22

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    So far all I’ve done is remove the old BDR91. Disconnected all the wires. Then wired up the hive system as shown. Had no issues with the old thermostat.

    I’ve actually just disconnected the hive system and wired up the old BDR91 and the heating is working perfectly!

    I have no idea what’s going wrong!
     
  7. ianmcd

    ianmcd

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    remove the batteries from the hive thermostat , does the boiler still fire ?
     
  8. DanielGray22

    DanielGray22

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    Yeah we’ve tried that and the boiler is still firing. I played around with the locations of the grey and brown cables but have had no success. Either the boiler fires up as soon as power is connected (without any instruction from the hive thermostat-batteries taken out) and will not shut off. Or pressing the heating button on the receiver fires the boiler up but won’t switch off when instructed to do so by the hive thermostat!!
     
  9. ianmcd

    ianmcd

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    which worcester combi do you have ?
     
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  11. ianmcd

    ianmcd

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    really cant think what you have done wrong, put the BDR91 back on and with everything working post a pic of where the wires are connected on the BDR when it works, as you have 2 brown wires put a piece of tape round one so they dont get mixed up
     
  12. DanielGray22

    DanielGray22

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    Here is the current wiring for the working BDR91.
    I have a Worcester Greenstar 24i Junior Combi MK V
     

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  13. ianmcd

    ianmcd

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    yep you are wiring it correctly so the Hive should work seems like you have a faulty receiver, wire the hive up and switch the boiler to HW only, turn the power on and the boiler wont fire, see if the hive thermostat or your phone control the hive receiver, light coming on when a demand is made and off when turned down again, if it does and when you select CH and HW and it still stays on all the time then the receiver is faulty.
     
  14. CBW

    CBW

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    Could it be one of the wires is the NS? Or have I got it wrong?
     
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  15. ianmcd

    ianmcd

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    What is NS mate ?
     
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  16. CBW

    CBW

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    Neutral supply boiler end?
     
  17. ianmcd

    ianmcd

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    But it works fine if he puts the BDR back on, nothing has been touched boiler end, and boiler stays on when Hive connected so not that
     
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