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Type: Posts; User: MajorDanby

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  1. Replies
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    My 2 BDRS and CS92 are nowhere near 30cm apart or...

    My 2 BDRS and CS92 are nowhere near 30cm apart or from metal objects. It just isnít realistic in my airing cupboard. They work perfectly fine.

    This may not be the case in every installation of...
  2. Sounds like you have optimised start/stop...

    Sounds like you have optimised start/stop enabled, I.e it will aim to be at that temperature by the set time. Personally I have optimised start enabled and optimised stop disabled
  3. Have you got a hot water sensor? Try changing the...

    Have you got a hot water sensor? Try changing the batteries in that. Itís sent my system screwy before
  4. You will need two BDRs to switch the respective...

    You will need two BDRs to switch the respective motor lives in your 3 port valve. I am assuming that your boiler is then switched by the switched live from you valve (orange wire).

    If you have a...
  5. Hi, Yes you can do it in stages. The first...

    Hi,

    Yes you can do it in stages. The first thing you will need to do is buy the controller and associated relays (bdr91) to control your zone valve. You can then add HR92s as and when. Just bear...
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    Iíd get a humidity sensor, they are fairly cheap...

    Iíd get a humidity sensor, they are fairly cheap and will give you an indication of where you are at in your house.

    MVHRs are expensive although from general awareness would definitely improve...
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    SmartThings has in built geofencing, the key is...

    SmartThings has in built geofencing, the key is setting up an appropriate device that IFTTT can read and therefore use to control Evohome. The way to do this is to use a virtual switch or presence...
  8. Hi Julian, Does canít quite work out how your...

    Hi Julian,

    Does canít quite work out how your system is configured, do you also have a switched live from your zone valves to your boiler?

    My rather limited understanding of an s-plan plus...
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    Set the local overrides to disabled and see if it...

    Set the local overrides to disabled and see if it continues happening, sounds like a kids/partner/pet issue
  10. Replies
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    Iíve got geofencing set up via SmartThings and it...

    Iíve got geofencing set up via SmartThings and it works great.

    I wrote a thread about it here:...
  11. Poor choice of language Bruce, firing up to 37...

    Poor choice of language Bruce, firing up to 37 degrees and then just running the pump. Boiler remains on. I would say that over the hour period the BDR was opening the CH valve for maybe 15-20 mins
  12. So for the last hour my system has been sitting...

    So for the last hour my system has been sitting at 11% demand. In that time the boiler has been alternating between being off and modulating down to a flow temperature of 37 degrees. Regarding the CH...
  13. Pretty sure it does, Iíll double check tomorrow...

    Pretty sure it does, Iíll double check tomorrow for you
  14. Thatís really strange, in answer to your question...

    Thatís really strange, in answer to your question - yes it functions at low demands. Recently been doing some building work and I have been heating just one room regularly running around 8-10% demand
  15. Yes I have exactly the same and it works fine....

    Yes I have exactly the same and it works fine. Not really enough info to try to trouble shoot. Youíre first option is trying to remind the CH BDR. Has OpenTherm recently been added?

    A temporary...
  16. What is your system currently? Specifically do...

    What is your system currently? Specifically do you have any zone valves and what currently calls for heat from your boiler?

    Isnít the dt20rf for a system set up? If you have a combi then it should...
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    The energy considerations are the same from a...

    The energy considerations are the same from a thermal mass perspective as well as air temperature. There will obviously be a greater lag to those elements heating up however. Couldnít possibly...
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    This is absolutely never the caseÖ Imagine...

    This is absolutely never the caseÖ

    Imagine your room as a box and your heat as energy. If energy is escaping the box you need to supply the equivalent amount of energy to maintain a consistent...
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    Itís the same here

    Itís the same here
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    Edit: wrong thermostat - got my product codes...

    Edit: wrong thermostat - got my product codes mixed up
  21. Replies
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    Yes, if you go into the installer menu and then...

    Yes, if you go into the installer menu and then system devices you will see an option for boiler control, which will be set to Ďnoneí. From this menu you can select boiler control as opentherm which...
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    Yeah, itís actually fairly simple. Leave the...

    Yeah, itís actually fairly simple.

    Leave the existing system configuration as is - I.e the room stat or HR92 calls for heat from the evohome controller which in turn activates the bdr91 and opens...
  23. Stratification occurs in a hot water cylinder by...

    Stratification occurs in a hot water cylinder by design. Stick it to 60 deg c and you will be fine
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    Have you tried changing the batteries in the hot...

    Have you tried changing the batteries in the hot water sensor? When mine ran low it generated a multitude of comms errors
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    You wouldnít wire it in parallel, it would be in...

    You wouldnít wire it in parallel, it would be in series - ie the controller would only provide power to the BDR if it was set as on.

    The Rayburn would need an open loop so that the temp in the...
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