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  1. Which "low load algorithm" is this ? Is this...

    Which "low load algorithm" is this ? Is this something new in the Betas ? I can't see any reason why OpenTherm would keep switching the boiler off and on in a partial load situation. The whole point...
  2. If you use a boiler relay, yes, if you use...

    If you use a boiler relay, yes, if you use OpenTherm, no. TPI only applies to relays.

    Edit: On thinking it through a bit more if you use OpenTherm plus a heating zone valve, the zone valve will be...
  3. In an S-Plan system with a heating zone valve the...

    In an S-Plan system with a heating zone valve the zone valve will always cycle on and off using TPI when there is a partial load. This is true whether you have OpenTherm or whether like me you have a...
  4. You're not understanding what was meant by "can't...

    You're not understanding what was meant by "can't modulate low enough". It's not referring to the minimum flow temperature, but the minimum power output.

    If you have a 25kW boiler and a modulation...
  5. By "sacrificed" do you mean that TPI cycles with...

    By "sacrificed" do you mean that TPI cycles with less than 10% demand are just skipped ?
  6. Doesn't sound right. Open Window mode still seems...

    Doesn't sound right. Open Window mode still seems to work correctly here on the latest Beta. I've triggered it inadvertently a few times lately (with doors rather than windows) and haven't noticed...
  7. Hi Andy, Isn't that exactly what I suggested...

    Hi Andy,

    Isn't that exactly what I suggested though ? That heat demands of less than 10% still fire the boiler but for a minimum of 1 minute ? (10% duty cycle for the default 6 cycles per hour)
    ...
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    They also get very hot even when out in the open...

    They also get very hot even when out in the open (flow temperature plus power dissipation of the pump) so I would imagine that having it trapped under floor boards with no way to cool properly would...
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    Ok. Yes it has to go between the output side of...

    Ok. Yes it has to go between the output side of the pump and the return line. Strange to have the pump under the floor boards, I've never heard of such a thing...
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    Most boilers have pump overrun so when the boiler...

    Most boilers have pump overrun so when the boiler demand signal is turned off (BDR91 etc) the pump will continue to run for a few minutes. If all the valves are closed and there is nowhere for that...
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    I don't understand why you would need to rip up...

    I don't understand why you would need to rip up your floor boards to install an automatic bypass valve. They're usually installed within about a metre of the boiler so unless you have a very short...
  12. If it's only happening in one or two zones,...

    If it's only happening in one or two zones, choose a random time in the hour, remove all the batteries from the HR92's in the affected zone(s) and then refit them.

    This should fix it. Honest. :)
    ...
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    I think we're talking at cross purposes here. I...

    I think we're talking at cross purposes here. I don't use Domoticz. I was referring to the over the air API's only.

    I was just trying to point out that the V1 API does still report high resolution...
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    You misunderstand - I know about the 15 minute...

    You misunderstand - I know about the 15 minute reauthentication issue that's been there for quite a while now. watchforstock's V1 client deals with this gracefully so it's able to reuse the token...
  15. What temperature does it override to ? The...

    What temperature does it override to ? The previous set point for the schedule ?
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    Are you sure ? I'm still receiving high...

    Are you sure ? I'm still receiving high resolution temperature readings using the V1 API with Evohome python bindings. I use it for my graphing.

    Ergh... where did you find this out ? Do you know...
  17. Oh, that's disapointing to hear. One of the...

    Oh, that's disapointing to hear.

    One of the things that attracted me to OpenTherm if I ever ended up with a new boiler is I hate the 10% minimum heat demand threshold the Evohome system has when...
  18. Another example of the outdoor temperature of the...

    Another example of the outdoor temperature of the Evotouch being waaaaaay behind reality.

    It was quite cold last night and is clear and sunny today. At 10am this morning my weather station is...
  19. That was what I thought before I set up a 24/7...

    That was what I thought before I set up a 24/7 independent monitoring system to monitor the wireless transmissions. And it has shown conclusively that in every case where I'm getting a "comms fault"...
  20. And the latest hot water "comms fault": ...

    And the latest hot water "comms fault":

    https://drive.google.com/uc?export=download&id=1PCiKFCIr72OHJXc4m3aaDnVYU03sJwGe
    ...
  21. Perhaps, but all these variations on a theme just...

    Perhaps, but all these variations on a theme just result in the conclusion "poor receiver" in the Evotouch.
  22. Perhaps, but that wouldn't explain why my...

    Perhaps, but that wouldn't explain why my independent monitoring system mounted about a metre away from the controller can always hear the CS92A messages that the controller misses. Unless the...
  23. In my case I think it is indeed the controller to...

    In my case I think it is indeed the controller to blame. I have had the CS92A replaced and also have moved it several times, never has it been completely reliable.

    However when I've compared the...
  24. Sounds like a plan. :)

    Sounds like a plan. :)
  25. Weird, but glad you got it fixed.

    Weird, but glad you got it fixed.
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