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  1. #1
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    Carrier open RTU space temp via BACnet

    Quick question: I've got a couple of these that will work as long as I've got a equipment touch plugged in which I know can serve as a zone temp but shut down when I unplug it and walk down stairs. Thought I found points to write zone temp, rh, and co2. Didn't see a setting anywhere to configure it to use the bacnet zone temp though.
    Scott Jalbert, WebCTRL ninja, Naiagara AX and Smartstruxure newb, SiteScan Retired

    The master has failed more times than the beginner has even tried

  2. #2
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    Those units can be a real pain. You read their app note on how to write to them?

    https://hvac-talk.com/vbb/showthread...Board-problems
    Propagating the formula. http://www.noagendashow.com/

  3. #3
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    Agree with orion. They are pain to use. There should be a network space temp or rat to write to. The app note tells you which input and tte frequency to write it. Every important to follow. Also when you write to the point it will revert back to some other number (999 or somthing like that) when it is accepted but the read only effective temp will still show last value until the next write.

  4. #4
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    Thread Starter
    Thanks! That does look exactly like what I need.
    Scott Jalbert, WebCTRL ninja, Naiagara AX and Smartstruxure newb, SiteScan Retired

    The master has failed more times than the beginner has even tried

  5. #5
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    Max. The rtu open needs a sat and space temp input to operate. When you take off the ET you loose space temp. With the et space temp is by a network input

    There is a network space temp input for these boards.

    You can bacnet info to the board. But if it doesn’t have the function turned on to use it noting will happen.

    Max if you email
    Me again I have something for you that will be of great help.

  6. #6
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    sounds like a nightmare
    Keep it simple to keep it cool!

  7. #7
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    Thread Starter
    Quote Originally Posted by stanbyyourword View Post
    sounds like a nightmare
    My major problem with ALC OEMs is none of them seem to have any concept of self explanatory naming conventions and then they bundle that with no point definitions on what points do what.

    Carrier here is no exception, they know the bacnet integration guide they shipped wasn't complete and then released another guide explaining which points were for what and how they worked. Why is that two manuals? Was it too difficult to uprev the original one?

  8. #8
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    Im reading a carel manual now for ground source heat pump parameters same thing so unclear, it`s like they want you to call them
    Keep it simple to keep it cool!

  9. #9
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    Quote Originally Posted by MaxBurn View Post
    My major problem with ALC OEMs is none of them seem to have any concept of self explanatory naming conventions and then they bundle that with no point definitions on what points do what.

    Carrier here is no exception, they know the bacnet integration guide they shipped wasn't complete and then released another guide explaining which points were for what and how they worked. Why is that two manuals? Was it too difficult to uprev the original one?
    perhaps Kontrolphreak can help you
    Keep it simple to keep it cool!

  10. #10
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    Negative, no experience with those units. Only Carrier integration I have done on air handling equipment was back over a decade ago, more recently it had been there air cooled chillers with the OEM gateway which went smoothly.

    kontrol out
    "Good" - Jocko
    "Open is as open does." - Forrest Gump
    "Can't we all just get a Lon?" - Garry Jack
    "BACnet: integration or interrogation?" - The Janitor
    "Interoperability? You can't handle interoperability!" - Nathan R. Jessup
    “What’s that? Aaa… open protocols? Don’t talk about…. open protocols? Are you kidding me? Open protocols? I just hope we can hardwire an interface!” - Jim Mora Watch it here!

  11. #11
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    Quote Originally Posted by stanbyyourword View Post
    it`s like they want you to call them
    Trust me they don't. Unless you purchased the equipment from them, chances of getting any real support isn't likely without hours of time wasted getting bounced to different departments.

    Its factory equipment. They get their money before the equipment shows up and after that, they really don't give give a crap.
    Propagating the formula. http://www.noagendashow.com/

  12. #12
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    nice
    Keep it simple to keep it cool!

  13. #13
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    I enjoy revisiting job sites a couple of years after completion that have RTU Open installed. I am finally able to place those boards that have failed in the dumpster where they belong.

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