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  1. I think the recommendation according to the...

    I think the recommendation according to the installation manual, when you have HR92s, is to have a wirelessly connected BDR91 or R8810 boiler control, not a wired connection.

    You can still use...
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    The 🔁 icon indicates those zones are permanently...

    The 🔁 icon indicates those zones are permanently set to the specified temperature, so wonít follow their schedule, and either not heat if set to a low temperature, or heat and maintain a higher...
  3. http://elektronetshop.shopgate.com/item/3738303933...

    http://elektronetshop.shopgate.com/item/373830393332
  4. https://www.bolasystems.com/controller-for-3-point...

    https://www.bolasystems.com/controller-for-3-point-mixing-valve-with-honeywell-hm80-propulsion
  5. Thatís where I got mine but I had to wait a...

    Thatís where I got mine but I had to wait a while, as production was moving to a new factory. It was worth it though, but the EvoHome shop donít have much experience of it, so couldnít provide much...
  6. Iím sorry but I canít seem to view your diagram. ...

    Iím sorry but I canít seem to view your diagram.

    Why use Heatmiser at all? If you donít want to use HCC80 you can instead control each zoneís actuator by a BDR91. Then use a T87RF, DTS92...
  7. Hi Saaj, Do you find that HCC80s in combination...

    Hi Saaj,
    Do you find that HCC80s in combination with OpenTherm works well?

    The reason I ask is that I am moving house next month and expect to be installing this setup, probably 4 HCC80s, 1 per...
  8. What version of firmware is running? I think you...

    What version of firmware is running? I think you may need to request an update.
    ...
  9. Hold down the Settings menu for 5 seconds, then...

    Hold down the Settings menu for 5 seconds, then press System Summary.
  10. I think it is a mistake in the Xclusive's manual....

    I think it is a mistake in the Xclusive's manual. If you look in other Intergas manuals, for instance my boiler, you'll see the following descriptions.

    Parameter E: Min. Supply temperature during...
  11. That is the correct behaviour. You've set the...

    That is the correct behaviour. You've set the minimum temperature for OT demand to 25C, so the minimum seen should be 25C and not any temperature less than this.

    I'll try to find out by...
  12. Another way to look at OpenTherm low load low/off...

    Another way to look at OpenTherm low load low/off control is that Evohome has no idea what the lowest flow setpoint is. It can read the Max CH water setpoint (which is often wrong e.g. Intergas...
  13. I never said it was a problem, I think you...

    I never said it was a problem, I think you doubted that this mode of operation occurred, hence my explanation.
  14. It's not new, it's described as "When an...

    It's not new, it's described as "When an appliance is no longer able to modulate lower the control switches from modulating control to low/off control.". The T6 thermostats have a more sophisticated...
  15. Not quite. You will see this with OpenTherm and...

    Not quite. You will see this with OpenTherm and no heating valve when the low load algorithm comes into play. (I seem to keep repeating myself on this).

    The algorithm sends a >10C flow...
  16. Yes, it appears to be, every 10mins or so. A...

    Yes, it appears to be, every 10mins or so. A plot of the flow temperature request might show short 10C (off) requests.
  17. Hi Dan, With EvoHome and HR92 on all radiators...

    Hi Dan,

    With EvoHome and HR92 on all radiators you really should keep the CH valve open. I have a Normally Open valve fitted which closes when DHW is being heated.

    I guess what is happening...
  18. > Thats a pure madness or a fault That doesnít...

    > Thats a pure madness or a fault

    That doesnít sound right, do you see your boiler responding correctly to OpenTherm lower temperatures?

    What is your P057 parameter set to? If set to 2,...
  19. What boiler do you have? EvoHome does employ...

    What boiler do you have? EvoHome does employ on/off control with OpenTherm under low load situations, but for me it is always at lower temperatures, typically under 40C.

    Have you connected an...
  20. Constant Pressure, probably with the minimum...

    Constant Pressure, probably with the minimum curve setting/speed required to achieve your designed manifold flow rate.
  21. I used to have a setup like yours but upgraded to...

    I used to have a setup like yours but upgraded to an HM80 mixer valve, which is far superior for single zones, eliminating the overshoots I saw with the BDR91. It doesnít use TPI but learns the...
  22. Hmm, my EvoTouch seems to now be reporting a 13C...

    Hmm, my EvoTouch seems to now be reporting a 13C outside temperature all the time, just now and every time I checked yesterday. Itís 5C outside.
  23. Thatís really bad and unfortunate for me too,...

    Thatís really bad and unfortunate for me too, because Iím planning to move to a house which has UFH and an OpenTherm boiler and I intend to install EvoHome again.

    I think...
  24. With older firmware, and OpenTherm, the boiler...

    With older firmware, and OpenTherm, the boiler still used to fire if the aggregated demand was much less than 10%.

    With the newer firmware it only seems to send a flow temperature above 10C to...
  25. You will dead head the pump, possibly reducing...

    You will dead head the pump, possibly reducing its life.
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