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  1. Replies
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    Could it be the same issue as this, reset the...

    Could it be the same issue as this, reset the boilerís RF unit?

    https://www.automatedhome.co.uk/vbulletin/showthread.php?6415-Evohome-Opentherm-Bridge-Binding-issue&p=45611&viewfull=1#post45611
  2. Ally153 indicated: The feature is activated...

    Ally153 indicated:

    The feature is activated when the outside temperature gets close to or exceeds the room setpoint when the room temperature is already within 0.5C of setpoint. As you've noticed,...
  3. What I also noticed is that if you make any...

    What I also noticed is that if you make any adjustments to any zone’s schedule, warm weather saver is deactivated for all active zones.
  4. Thanks for the insight @ally153, that explains...

    Thanks for the insight @ally153, that explains what I am seeing.

    What determines when warm weather saver is activated for a zone? I donít think the outside temperature ever exceeded their set...
  5. I think the motivation is less user intervention....

    I think the motivation is less user intervention. Warm Weather Saver will save energy if a user doesnít normally turn off the heating or switch to eco mode in spring/autumn. It probably avoids...
  6. 1798 Some interesting observations. As...

    1798

    Some interesting observations.

    As reported previously, the outside temperature is 3C less than actual.

    I have both Cold Weather Boost and Warm Weather Saver activating at the same...
  7. Replies
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    Maybe you will need to use Signal2 BDR91Ts to...

    Maybe you will need to use Signal2 BDR91Ts to signal to the HCE80s to switch to cooling mode.
  8. Replies
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    The installer was indicating a cable needed to...

    The installer was indicating a cable needed to run from the zone valve to control the boiler.

    What you describe doesn’t require a cable back to the boiler, I think just wiring the high limit stat...
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    Yes, that’s correct

    Yes, that’s correct
  10. Replies
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    2,193

    If you have a boiler control BDR91 you don’t need...

    If you have a boiler control BDR91 you don’t need the Zone valve to fire the boiler.

    If you need to switch the boiler to a DHW mode for instance by connecting a cylinder NTC, you can use another...
  11. Replies
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    2,193

    The plumber is wrong, Evohome can wirelessly...

    The plumber is wrong, Evohome can wirelessly activate more than one BDR91 relay on DHW operation.
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    Was your System Summary in the System...

    Was your System Summary in the System Configuration menu showing 0%?

    There can be a delay before 0% is indicated and until then there may still be a call for heat.
  13. Replies
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    Yes, this should work and would at least limit CH...

    Yes, this should work and would at least limit CH overshoot on DHW heating
  14. The boiler DHW operation is completely...

    The boiler DHW operation is completely independent from Evohome, Evohome doesn’t provide the time. The Eco learning is supposed to be based on usage, so I guess it’s essential that the boiler’s time...
  15. I’d always recommend using OpenTherm if you can,...

    I’d always recommend using OpenTherm if you can, sounds like your installer is not familiar with its benefits.
  16. Iíd vote for Intergas too, I fitted one in my...

    Iíd vote for Intergas too, I fitted one in my last house. Or an Atag.

    Iíve inherited a Vokera in my new house. Out of the box it would default to 80C max flow temperature, so Iíve used an OTGW...
  17. Sounds like this is DHW preheat, have you tried...

    Sounds like this is DHW preheat, have you tried setting it to Eco?

    ► P-on (Program on):
    The appliance's DHW comfort function is switched on continuously within the chosen time slots. In this mode...
  18. 1788 1789 Here are all the types of requests...

    1788
    1789

    Here are all the types of requests seen by my OTGW. You can see there are a bunch of them with a period of around 1m45s.

    The DHW ones are odd, because Evohome doesn't distinguish...
  19. Replies
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    Great. Might be useful to understand typical...

    Great. Might be useful to understand typical electricity consumption/costs too.
  20. Bruce, how often does the Evohome controller...

    Bruce, how often does the Evohome controller communicate with the OTB? Maybe that frequency has changed and that influences how often the OTB reads boiler parameters. There are several other...
  21. From my previous house with Intergas boiler. The...

    From my previous house with Intergas boiler. The Intergas boiler returns fractional temperatures, its sensor was very accurate according to my Netatmo weather station.

    01:42:24.375260 T001B0000 ...
  22. Yes, that's right, approximately every 1m 45s. ...

    Yes, that's right, approximately every 1m 45s. It's not OTGW initiated, it is coming from the OTB (T for Thermostat, B for Boiler):

    00:01:06.465029 T001B0000 Read-Data Outside temperature:...
  23. It's worked well for me in both a radiator and...

    It's worked well for me in both a radiator and now a UFH setup. I can hardly believe that the previous owner of my house had the UFH TMV set to 75C with a boiler temperature of 70C. Now, in this...
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    Out of interest Vaughn, what is your setup? I...

    Out of interest Vaughn, what is your setup? I see myself eventually going down the GSHP route. My house was originally going to have one fitted but the previous owner heard negative feedback from...
  25. Stick an OTGW between the OTB and VR33? That...

    Stick an OTGW between the OTB and VR33? That should tell you whether the Domoticz->HGI80->OTB path is working, returning the same value.

    We know OTB->Boiler->Outdoor sensor works. The OTB...
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