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  1. W72** control is volts dc. W74** series is not. I...

    W72** control is volts dc. W74** series is not. I think it's 135ohm??? Can't remember. But no, it won't work without changing the motor too.


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  2. CCN can't talk to BACnet. The only way I see to...

    CCN can't talk to BACnet. The only way I see to do it would be to allow the zones to run off their primary air sensor, but they wouldn't be able to communicate their needs for heating or cooling. At...
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    I have been told it works fine but I haven't done...

    I have been told it works fine but I haven't done it myself. I am currently using it with windows 7, no problem.
  4. Thread: LonSpec

    by Jason Grossman
    Replies
    5
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    208

    LonSpec

    Has anyone successfully used a USB to ft Lon adapter with honeywell's lonspec? Seems to me it should work but I don't think it was supported. Trying to get away from PCMCIA slot card. That's the...
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    40,604

    I would love a copy of 4.1. The micro zone...

    I would love a copy of 4.1. The micro zone manuals would be helpful too. Thanks a lot. Jason.


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  6. The only real savings would come from stopping...

    The only real savings would come from stopping the loop pumps all together. There is a way to have all the HPs communicated their heat or cool requests back to the mechanical room controllers,...
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    Very generous. Thanks. Sent from my iPhone...

    Very generous. Thanks.


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  8. Replies
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    281

    We have been doing the ccn stuff for years and...

    We have been doing the ccn stuff for years and there is tons of vvt, all generations, around here. Just switching to the open product in the last year. I love it. The job I'm doing right now is...
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    Not really issues, just not enough literature out...

    Not really issues, just not enough literature out yet to make it clear how to avoid the pitfalls of a new product. What market are you in? I saw upstate New York in your profile. I'm in Albany.

    ...
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    They have a few levels of certification, 3 I...

    They have a few levels of certification, 3 I think? Vvt and vav, field applied, etc. You do business with RJ Murray? Chuck has the info. I already have an equipment touch ordered for a job. I know...
  11. Thread: AAM bus

    by Jason Grossman
    Replies
    13
    Views
    397

    Somehow I feel like I screwed up by stumbling...

    Somehow I feel like I screwed up by stumbling onto a job that was done poorly. I appreciate the info, that's why I asked. I am just removing this job but I could just as likely be there to try to fix...
  12. Thread: AAM bus

    by Jason Grossman
    Replies
    13
    Views
    397

    Sorry I asked Sent from my iPhone using...

    Sorry I asked


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  13. Replies
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    4,262

    I could use a copy too. Thanks. Sent from...

    I could use a copy too. Thanks.


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  14. Replies
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    281

    They will not give it to you until you are...

    They will not give it to you until you are certified at some level in controls. Even then it's a runaround. Touch graphics are coming but the training for how to do them isn't even due out til next...
  15. Thread: AAM bus

    by Jason Grossman
    Replies
    13
    Views
    397

    I thought of something like that but it appears...

    I thought of something like that but it appears to have all been done at once. I too have used a four or six conductor to insert a couple controllers into the middle of an existing bus. I wasn't sure...
  16. Thread: AAM bus

    by Jason Grossman
    Replies
    13
    Views
    397

    I agree wholeheartedly. Products each have...

    I agree wholeheartedly. Products each have strengths and weaknesses. That's why it's best to have a couple options so you can use the BEST product for THAT job, not just what you sell. And if you put...
  17. Thread: AAM bus

    by Jason Grossman
    Replies
    13
    Views
    397

    You just described exactly why it's getting...

    You just described exactly why it's getting ripped out. Rats nest of wiring, lousy front end, barely a control system really. No discharge air on wshp's??? Installer was not asked to bid replacement...
  18. Thread: AAM bus

    by Jason Grossman
    Replies
    13
    Views
    397

    AAM bus

    Can someone explain the AAM bus topology to me on the older controls? Pup controllers I believe. It appears to be 485 but for some reason the comm buss is a 4 conductor at each controller and the...
  19. There is a patch for field assistant to upload...

    There is a patch for field assistant to upload new 6.0 pic controllers in 5.1. I have also had trouble completing uploads/downloads if the computer memory is too small( I believe they require 2 gigs ...
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    The unit in question is a Schneider, not a...

    The unit in question is a Schneider, not a liebert and they show the traps before the receiver not between like liebert does it. That's what sparked the debate. I don't understand how putting an...
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    B anb B makes a good one I have used but last I...

    B anb B makes a good one I have used but last I checked it was quite a bit more expensive than the rep485


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  22. Replies
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    840

    Either way, it doesn't matter where the inverted...

    Either way, it doesn't matter where the inverted trap is located as long as it exists and goes above the coil. That's the key installation detail. Thanks.


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  23. Replies
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    That's my understanding too. Why does liebert...

    That's my understanding too. Why does liebert draw them between the condenser coil and the reciever? In that configuration liquid could still flood the indoor section if a solenoid failed or stuck?
    ...
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    refrigerant piping question

    does it matter if the inverted trap going to a liebert type condensing unit, above the compressor, is located between the receiver and the condenser or can they just be located where the lines come...
  25. I recently came across a bulletin on the acbs...

    I recently came across a bulletin on the acbs site that indicated grounding one side of the transformer secondary, as required by nec if primary voltage is over 150 v to ground, can cause ground...
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