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Hive Dual Channel replacing Honeywell BDR91 & ST9100c

Discussion in 'Plumbing and Central Heating' started by Dave1010, 1 Oct 2021.

  1. Dave1010

    Dave1010

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    Hi,

    I would like to replace my existing Honeywell ST9100C HW controller and BDR91 CH receiver with a Hive dual channel receiver. The system has an immersion tank for the HW.

    The BDR91 is wired as follows:
    BDR91.jpg

    The ST9100C is wired as follows:

    ST9100C.jpg

    These 2 cables go back to a 10 way junction box which also has cables for the boiler, fused spur, pump, 3-port valve and HW stat.

    I would greatly appreciate some advice on how to wire in the new Hive controller so that the 2 cables coming out of the JB to serve the BDR91 and ST9100c are replaced with a single cable to the Hive.

    Thanks in advance
     

    Attached Files:

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  3. CBW

    CBW

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    I think you may need Hive single channel, as your Honeywell St9100c is a single channel, unless you are heating hot water via the boiler with the Hive?
     
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  4. Dave1010

    Dave1010

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    Hi Chris - the hot water and central heating will be through the boiler and both will be controlled by the Hive
     
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  5. CBW

    CBW

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    Do you have a 3 port valve or x2 2 port valves?
     
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  7. Dave1010

    Dave1010

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    1 x Honeywell Sundial Y Plan 3 position diverter valve
     
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  8. Dave1010

    Dave1010

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    Wiring centre Photo:

    WIRING CENTRE.jpg
     
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  9. CBW

    CBW

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    Please bear in mind, I’m not 100% with wiring yet. However there maybe someone who can clarify what I’ve put?

    It appears that your existing setup, that the thermostat is wired directly to the 3 port? You need to trace the wiring of the receiver first and decommission this. Open up your wiring center and I think it’s wire the Hive terminals to the terminal strip:
    Hw on - 3 on Hive to number 8 on strip
    Heat on - 4 on Hive to number 6 on strip
    Hw off - 1 on Hive to number 7 on strip

    Obviously you need permanent Live and permanent Neutral, and earths should be self explanatory

    Hopefully, this is what you’re trying to replicate:
     

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  10. Dave1010

    Dave1010

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    Yes, looks that way via terminal 7

    Thanks for this Chris. Live, Neutral and Earth I'm ok with but still getting my head around control wiring.
     
    Last edited: 1 Oct 2021
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