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Thread: Fuzzy logic and open windows

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    Question Fuzzy logic and open windows

    That title should confuse Google!
    I note from previous posts that the radiator valves have fuzzy logic running within which can detect a change is temperature which is out of pattern, and could be blamed on an open window or door.
    My question is whether wall mounted thermostats (Evotouch, DT92) have similar logic running.

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    Automated Home Legend top brake's Avatar
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    Quote Originally Posted by JDriver View Post
    That title should confuse Google!
    I note from previous posts that the radiator valves have fuzzy logic running within which can detect a change is temperature which is out of pattern, and could be blamed on an open window or door.
    My question is whether wall mounted thermostats (Evotouch, DT92) have similar logic running.
    yes i just checked and radiator zones with seperate sensor to the HR92(s) you still have open window function
    I work for Resideo, posts are personal and my own views.

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    Quote Originally Posted by top brake View Post
    yes i just checked and radiator zones with seperate sensor to the HR92(s) you still have open window function
    I don't think that's what I meant. I have an 8 zone system, and thus expect to install 8 BDR91 MV controllers each bound to a DTS92 or DT92 room stat. Would this combination have the 'open window' sensing?

    Whilst I'm at it is the current equivalent DHW valve controller a ATF500DHW? (I ask because there seems to be a plethora of options.) All these to be controlled by an ATC928G3000 control centre, assuming that is the latest version.

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    Automated Home Legend top brake's Avatar
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    Quote Originally Posted by JDriver View Post
    I don't think that's what I meant. I have an 8 zone system, and thus expect to install 8 BDR91 MV controllers each bound to a DTS92 or DT92 room stat. Would this combination have the 'open window' sensing?

    Whilst I'm at it is the current equivalent DHW valve controller a ATF500DHW? (I ask because there seems to be a plethora of options.) All these to be controlled by an ATC928G3000 control centre, assuming that is the latest version.
    Wow sounds like quite a system. I would also consider converting to a HR92 radiator controlled system

    The window open functionality is not available on 'zone valve' heating types


    Yes ATF500DHW for hot water cylinder

    Recommend checking out the youlearn in the link below in my sig
    I work for Resideo, posts are personal and my own views.

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    Quote Originally Posted by top brake View Post
    Wow sounds like quite a system. I would also consider converting to a HR92 radiator controlled system

    The window open functionality is not available on 'zone valve' heating types


    Yes ATF500DHW for hot water cylinder

    Recommend checking out the youlearn in the link below in my sig
    I have to stick to zone valves as this a dirty system due to some permeable plastic pipe somewhere in it. That generated magnetite which I know from experience will clog TRVs. Hadn't noticed the you learn bit, so starting on that tomorrow, thanks.

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    Automated Home Legend top brake's Avatar
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    Quote Originally Posted by JDriver View Post
    I have to stick to zone valves as this a dirty system due to some permeable plastic pipe somewhere in it. That generated magnetite which I know from experience will clog TRVs. Hadn't noticed the you learn bit, so starting on that tomorrow, thanks.
    Understood

    I would recommend installing a magnetic heating filter and getting the system powerflushed then dosed with inhibitors to minimise the formation of magnetite

    Never heard of a trv Blocking with magnetite as the velocity through them is high, it does block radiators and pipes and boiler heat exchangers though
    I work for Resideo, posts are personal and my own views.

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    Correct me if I'm wrong (probably!), but isn't the open window detection optimised for short periods of opening? I seem to remember it times out after half an hour?

    The reason I ask is because radiators are more of an instantaneous heat source - well kind of - that can cope with short fluctuations. Whereas UFH is more of a 'slow' thing.

    Do you see what I'm getting at?

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    Automated Home Legend top brake's Avatar
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    Quote Originally Posted by paulockenden View Post
    Correct me if I'm wrong (probably!), but isn't the open window detection optimised for short periods of opening? I seem to remember it times out after half an hour?

    The reason I ask is because radiators are more of an instantaneous heat source - well kind of - that can cope with short fluctuations. Whereas UFH is more of a 'slow' thing.

    Do you see what I'm getting at?
    Paul you are correct

    It is meant to be a short term thing that activates if a sudden temperature drop is detected.

    Default is to close the wireless TRV for 30 minutes; this is adjustable at the HR92 installer menu up to 90 minutes.

    You can also disable the open window detect function.
    I work for Resideo, posts are personal and my own views.

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    Automated Home Legend top brake's Avatar
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    FTAO JDriver

    Thanks for your direct message however you cannot receive a reply so are you happy for me to reply here?
    I work for Resideo, posts are personal and my own views.

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    The Setting is fixed now, but answer here if it is of general interest by all means.

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