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  1. #1
    Join Date
    Feb 2008
    Posts
    4

    Question Mcquay Microtech II to JCI N2 ?

    Greetings,
    I have a building with a Mcquay rooftop application with a Microtech II controller on it. The main board has N2 terminals that are wired over to the N2 connection of the compressor control board. I'm tempted to hook that N2 bus up to the buildings JCI N2 bus & see if I can map points into the buildings NAE.
    Anybody been this route ? or have a points listing ? it seems too easy !
    I started quizzing my JCI rep about it, he first admitted they made those boards for Mcquay but then he got real quiet real fast ?
    Thanks

  2. #2
    Join Date
    Jan 2008
    Location
    Taxachuesetts
    Posts
    218

    Mcquay Microtech II to JCI N2

    Quote Originally Posted by co2man View Post
    Greetings,
    I have a building with a Mcquay rooftop application with a Microtech II controller on it. The main board has N2 terminals that are wired over to the N2 connection of the compressor control board. I'm tempted to hook that N2 bus up to the buildings JCI N2 bus & see if I can map points into the buildings NAE.
    Anybody been this route ? or have a points listing ? it seems too easy !
    I started quizzing my JCI rep about it, he first admitted they made those boards for Mcquay but then he got real quiet real fast ?
    Thanks
    The Microtech II board is a custom N30 made by JC, with a bunch of I/O and the N2 bus for expansion boards. McQuay wrote the RTU application code, which is not accessable to System Tools. You can use CMS to change IP's and delete the Site$ object but thats about it.
    I have used Project Builder to add trend points, but McQuay was not happy about that. Never tried adding an N2 device. Be careful if you mess up the N30 database, McQuay will have to download the unit.

    Years ago we asked JCI for access to this product. The response was why do you want an Ethernet controller with I/O and controller bus for?

    York used the same board with different Application code for a few years.

  3. #3
    Join Date
    Sep 2007
    Location
    Michigan
    Posts
    290
    Quote Originally Posted by co2man View Post
    Greetings,
    I have a building with a Mcquay rooftop application with a Microtech II controller on it. The main board has N2 terminals that are wired over to the N2 connection of the compressor control board. I'm tempted to hook that N2 bus up to the buildings JCI N2 bus & see if I can map points into the buildings NAE.
    Anybody been this route ? or have a points listing ? it seems too easy !
    I started quizzing my JCI rep about it, he first admitted they made those boards for Mcquay but then he got real quiet real fast ?
    Thanks
    I'd stay away from that, unless you have JCI do it. I care not to go into anymore details about possible known issues. We tie into Microtechs all the time, mostly UVs.
    "Yeah I can figure out whats wrong with it, but you were here first and there isn't room for two, plus it's cold up here, I'll be in the van"

  4. #4
    Join Date
    Mar 2003
    Location
    Washington,NJ
    Posts
    504
    The MT-2, if it has an N2 card can be added to your network as an N2 open VND device. Get the long McQuay model # off the unit ID tag and contact McQuay, they'll let you know the proper VCT file needed to map up your points. Good Luck

  5. #5
    They are no big deal to setup. No doctorate in JCIism needed.

    One thing that may come back to bite ya though. If you are bringing these into PMI via a model. Double check your engineering values are correct in models. For example OCCUPIED and UNOCCUPIED are reversed from conventional JCI thinking. Not a big deal if you catch it, but something to think about before you map back a hundred of them and Unoccupied turns stuff on.

    The McQuay UV's are really slick and easy to integrate with a FX-40 with N2 or Lon Card options or a combination of both.

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