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Another HIVE howler....

Discussion in 'Plumbing and Central Heating' started by Hamilton1985, 23 Feb 2020.

  1. Hamilton1985

    Hamilton1985

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    Looking for some help fella’s

    installing a single channel receiver into a systems that has a emt2 and a wired thermostat.

    I have tried everything...... as it’s all taken off I only have a diagram of how it was originally wired. All in twin and earth btw

    the 240v spur went to the L,N of the timer/programmer, a link from L - 1, and another link from N & L - to N&L of thermostat with another Cable from boiler to 2&3 of the thermostat.

    on the hive
    - I made the 240v L&N with the cable from the boiler in 2&3 (nothing)
    - same again with the link from L-1 (nothing)
    - again but in 1-3 with no link from L (nothing)


    Swapped the emt2 with the hive but kept the wiring the same with the old thermostat cranked up to 30 with hive off.....boiler comes on but doesn’t go off....

    someone point me to the obvious error.....brain is pickled.

    TA
     

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  3. plastic_peanut

    plastic_peanut

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    Pretty sure you connect N then link L to COM and then connect the BOILER ON connection. There is no off connection.

    That’s what I did when replacing my old timer.
     
  4. CBW

    CBW

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    What boiler is it? (Make and model)

    Hive needs a permanent live and permanent neutral, which you can take from the spur or piggyback from the boiler. Then on from old thermostat to N/o on Hive and Common either linked from L or from boiler, hence asking which boiler.
     
  5. Hamilton1985

    Hamilton1985

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    Its a vokera compact28 se,

    are you sayin link blue from old thermo into N/O and link the the common with L?

    tried that to and got nowhere, everthings on but the boiler doesnt fire up on request.
     
  6. Hamilton1985

    Hamilton1985

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    wish mine was that easy, i have tried again nothing. Thanks for the suggestion.
     
  7. imiller9

    imiller9

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    Was there nothing on 3, CH on on the timer
     
  8. Hamilton1985

    Hamilton1985

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    Not when i first took the off.
     
  9. ianmcd

    ianmcd

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    you have made a a big mistake, you should not have put a link from L to 1 on the hive as your boiler is low voltage switching and you have put mains into it, probably need a new PCB on the boiler now
     
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  11. Hamilton1985

    Hamilton1985

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    I thought that myself, but when i revert to the old wiring the boiler behaves like it should, seriously confused.
     
  12. ianmcd

    ianmcd

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    Be very carefull then as if you connect that up wrong you will put 240v into the 24v section of the boilers PCB, and it will be an expensive mistake
     
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  13. ericmark

    ericmark

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    I downloaded the installation guide, and page 32 temp.jpg it shows connections can't see how the anticipator would work if not 230 volt control, I did the normal find for both ebus and opentherm and no result, so seems on/off control only, I found the instructions rather poor, one would expect it to say 24 volt or 230 volt and it does seem to show the use of volt free controls other than with the anticipator. Since Hive single channel can be wired volt free it would seem the best method, why take a chance. However it depends on if BG used enough cores in the cable or if they know one of the thermostat wires is line so have taken a short cut.

    Since the receiver for Hive can go close to boiler, I would wire volt free near the boiler using 5 core cable. I would also be actually using a meter to find what voltage used, would not attempt the job without test gear.
     
  14. Hamilton1985

    Hamilton1985

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    Its a weird one,

    iv swapped the emt2 programmer for the hive receiver as the plates are the exact same, cranked the thermo stat up to 30, turned off the hive and the boiler fires up and heats the house, the only way to switch it off is turn the thermostat off.
     
  15. ericmark

    ericmark

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    Plates may be same for Hive duel is likely same wiring but single Hive wiring unlikely the same.
     
  16. Hamilton1985

    Hamilton1985

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    So the only way for this to work is to completely start again?

    not ideal,
     
  17. ianmcd

    ianmcd

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    That is not the same boiler, The OP says he has a Compact SE, that link you supplied is a Compact standard efficiency, confusing I know but two completely different boilers the Compact SE can only use 240v switching with use of a relay
     
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