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Thread: Hcw82

  1. #11
    Automated Home Legend paulockenden's Avatar
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    Quote Originally Posted by top brake View Post
    what is the benefit you see of a HCW82 compared to a DT92 or Y87RF?
    That's what I'm hoping to find out.

    I expect the answer will be "none".

    (I suppose I could always claim that I'm going for the full set!)

    P.

  2. #12
    Automated Home Legend top brake's Avatar
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    Quote Originally Posted by paulockenden View Post
    That's what I'm hoping to find out.

    I expect the answer will be "none".

    (I suppose I could always claim that I'm going for the full set!)

    P.
    also please take care Paul that this isn't a thermostat in the traditional sense, rather it is an 'offset control' that will set a semi-permanent offset to the evohome set point

    rather counter-intuitive to most; these are typically found in commercial buildings

    if you want a simple room sensor you can also get a HCF82 without the adjustment wheel
    I work for Resideo, posts are personal and my own views.

  3. #13
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    Quote Originally Posted by top brake View Post
    also please take care Paul that this isn't a thermostat in the traditional sense, rather it is an 'offset control' that will set a semi-permanent offset to the evohome set point

    rather counter-intuitive to most; these are typically found in commercial buildings

    if you want a simple room sensor you can also get a HCF82 without the adjustment wheel
    Let's say that the temperature program has 20° C as setpoint for a zone with an HCW82 installed, and this one is set to +3° C. What exactly happens? What setpoint is shown on the controller? 23? Showing a local override?
    Thanks

  4. #14
    Automated Home Legend top brake's Avatar
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    Quote Originally Posted by Caudera View Post
    Let's say that the temperature program has 20° C as setpoint for a zone with an HCW82 installed, and this one is set to +3° C. What exactly happens? What setpoint is shown on the controller? 23? Showing a local override?
    Thanks
    I'm not sure and I don't have one to hand to test so I have escalated to support
    I work for Resideo, posts are personal and my own views.

  5. #15
    Automated Home Legend paulockenden's Avatar
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    The way I think it works is it reports the temp back to the controller, but if you adjust the dial then that reported temp is offset.

    E.g. If the room is at 20 degrees, and you set it to +2 then it only reports for the zone. So when the zone thinks it's at 20 it is really 22.

    I only use it as a remote sensor in a room where the hr92s struggle. I don't use the dial.

  6. #16
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    Quote Originally Posted by Caudera View Post
    Let's say that the temperature program has 20° C as setpoint for a zone with an HCW82 installed, and this one is set to +3° C. What exactly happens? What setpoint is shown on the controller? 23? Showing a local override?
    Thanks
    Indeed, the HCW82 will 'offset' the setpoint temperature. So if the zone it is located in is 'scheduled' to 20 degrees and the HCW82 is set to +3 it will be +3 degrees on the evohome setpoint (i.e. 23 degrees). When the evohome Controller changes scheduled setpoint to say 16 degrees and the HCW82 was left at +3 it would actually control the room temperature at 19 degrees.

  7. #17
    Automated Home Legend paulockenden's Avatar
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    And I'm pretty sure the offset is purely local to the sensor. It isn't communicated back to the controller.

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