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vaillant thermostat over riding hive

Discussion in 'Home Automation' started by Snoopy115, 29 Aug 2021.

  1. Snoopy115

    Snoopy115

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    Hive, vaillant ecotec plus 832 and vaillant VTR350f.
    My hive all seems ok. Hub 360, thermostat and receiver all have green lights etc.
    With the stat on manual @25c it says boiler is on. Receiver has green also but no heat.
    VTR350 on manual @25c boiler turns on. How do I over ride the VTR350f ?
    I would prefer to retain it in case of issues with hive (until confident)
    Thanks
     
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  3. CBW

    CBW

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    If it’s been left connected it’ll still search for the existing thermostat, especially if eBus type. How did you wire it up?
     
  4. Mottie

    Mottie

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    Doesn’t the hive and the Vaillant thermostats run on different voltages - Vaillant 24v and hive setup 240v ? I thought you had to remove the 24v link if using non-Vaillant contols.
     
  5. Snoopy115

    Snoopy115

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    From hive back plate. L N E to respective place on boiler
    Hive 1 to L on boiler. Hive 3 to RT 230 on boiler.
    Remove 24v RT link wire on boiler. ( this was still in situ with VRT350f )

    If I remove the bus link wire will this disable the vr350f without damage?
     
    Last edited: 29 Aug 2021
  6. CBW

    CBW

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    Yes, but Vaillant may use eBus, which is approx 5-7 VDC
     
  7. CBW

    CBW

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    Yes it should do. Is the VRT350 plugged into the front of the boiler, or a receiver?
     
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  9. Snoopy115

    Snoopy115

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    Front centre panel on boiler. Make sense it’s using the bus.
     
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  10. Snoopy115

    Snoopy115

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    Thanks for your help CBW will try trove the bus link wire tomorrow.
     
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  11. wannocks

    wannocks

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    The only way to stop the receiver for the 350f affecting the boiler is to disconnect the wiring (if external) or remove it from the front of the boiler if it's fitted there.
    You cannot have two controls connected to the boiler at the same time.
    Hopefully your installer left the blanking plate for the font of the boiler with you, if not they're available as a spare part.
     
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  12. Snoopy115

    Snoopy115

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    Wannock s from what you say I must remove the entire panel. Simply removing the bus link wire won’t do it. Is that correct ?
     
  13. wannocks

    wannocks

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    Yes. The 350 receiver in the front panel is directly connected to the PCB. Removing the 24 volt link will not disconnect the receiver.
     
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  14. Snoopy115

    Snoopy115

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    Thank you guys, appreciate your help
     
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