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    Evohome hackers untie! No, unite! :D

    Evohome hackers untie!

    No, unite! :D
  2. You must be on the first beta version 19.31 then....

    You must be on the first beta version 19.31 then. Hot water priority was first added in the 19.31 beta as a mandatory feature and as its a beta release the public documentation doesn't match how the...
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    No, they are not the same. :) The "heat...

    No, they are not the same. :)

    The "heat demand" from an HR92 is actually just the valve pin position from 0-100%. This is what gets sent over the air and what you will receive when doing your own...
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    A neighbour perhaps ? It's not just Evohome that...

    A neighbour perhaps ? It's not just Evohome that uses this wireless protocol. All the Honeywell wireless thermostats use the same protocol, so it could easily be a neighbour with a single zone...
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    What are you using as your receiver ? An HGI80 or...

    What are you using as your receiver ? An HGI80 or something like a NanoCUL with CC1101 ?

    I'm using the latter and although I tried evohome-listener and got it to sort of work last year, I later...
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    The set point is the requested temperature in...

    The set point is the requested temperature in your schedule, that is compared to the actual measured temperature (shown on the controller) by the HR92 to decide whether it needs to call for heat.
    ...
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    What are the measured temperatures relative to...

    What are the measured temperatures relative to the set point ? If the measured temperature is more than 1.5C above the set point a zone won't call for heat.

    What type of zones do you have ? Are...
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    The heat demands are shown in the "System...

    The heat demands are shown in the "System Summary" page inside the installer menu. So just do a long press on Settings, then go to System Summary. If you don't have any percentages on this page and...
  9. I just wanted to add that I didn't "recommend"...

    I just wanted to add that I didn't "recommend" 70C to anyone. :D Obviously the optimal flow temperature depends heavily on the size of your radiators, insulation in the house, whether your boiler is...
  10. I'd like to relate an observation I made...

    I'd like to relate an observation I made yesterday about the inconsistency in the way manual overrides are applied.

    If you set a manual override when cold weather boost is active and is boosting...
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    One problem with using the Away action like this...

    One problem with using the Away action like this is that Away disables Hot water unless you manually override it back on again.

    A custom action is the best way to do this and lets you apply the...
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    I don't think its "deafness" changes, it's simply...

    I don't think its "deafness" changes, it's simply that when the hot water system is active (in the differential band and/or heating or cooling quickly) the sensor sends very frequent messages so if...
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    That's my conclusion too after extensive testing.

    That's my conclusion too after extensive testing.
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    What is the voltage of the Alkalines you had in...

    What is the voltage of the Alkalines you had in stock ? New they should be 1.61 volts. They don't have to fall too far below this before they'll report 2 bars, so its pretty normal for them to drop...
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    Even though you tried retensioning the contacts...

    Even though you tried retensioning the contacts it's still probably a high resistance connection. When there is no load the voltage will be high and therefore the battery reading (which doesn't...
  16. If full stroke works better on one and they are...

    If full stroke works better on one and they are the same valve bodies I'd use it on all three.

    Even though I have Honeywell Valencia valves I find I have to use full stroke mode on all my HR92's...
  17. The valve pin positions will not be identical...

    The valve pin positions will not be identical between multiple HR92's in the same zone in single room mode, but in my experience they'll be within about 5% of each other. Certainly not enough to...
  18. Another thing I would check is whether the HR92's...

    Another thing I would check is whether the HR92's are really opening to different pin positions - this seems unlikely.

    When the problem is exhibiting (some radiators hot and others cold) go into...
  19. Sounds like it's working normally to me. :) What...

    Sounds like it's working normally to me. :) What you describe is TPI (time proportional integral) control. Google it.

    If maximum heat is required the heating relay will come on continuously. If no...
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    Sounds like the temperature sensor in it is...

    Sounds like the temperature sensor in it is faulty. As it's soldered to the main PCB I'd say it's not economically repairable.
  21. That's a very old firmware version now. If it...

    That's a very old firmware version now.

    If it is connected to the internet and added to your total connect comfort account it should in theory update automatically to the latest public release,...
  22. Fair enough. So if the boiler can modulate...

    Fair enough.

    So if the boiler can modulate sufficiently low the Evohome doesn't cut the heat demand ? How far over the requested temperature does it have to go before the Evohome intervenes and...
  23. From what you describe the root cause of the...

    From what you describe the root cause of the problem is still that the boiler can't modulate sufficiently low in output power to prevent the flow temperature overshooting and when it does, the...
  24. 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...
  25. 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...
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