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Type: Posts; User: nikko

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  1. Replies
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    You can't be serious?

    You can't be serious?
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    I'd suggest that rather than use a threshold of...

    I'd suggest that rather than use a threshold of 100% for your VAV damper position to trigger your reset scheme, you use 95% instead. This way you can also add code to ignore any box that's open > 98%...
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    I don't think the 202 will give you point names...

    I don't think the 202 will give you point names on an upload unless you have the original DB. But if it's a standard app (vs the programmable version) , you can look to their literature for a list of...
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    Yabut then you send a guy out on a service call,...

    Yabut then you send a guy out on a service call, he grabs both versions of the program you have on file and when he gets to site, there's a program mis-match. Means someone's been there after us and...
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    Interesting comments on the repeaters. I used to...

    Interesting comments on the repeaters. I used to carry a few of the little physical layer repeaters that Circon used to make in my bag and if a network has noise issues, or length issues, I'd stick...
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    Poll: Worked, thanks

    Worked, thanks
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    Poll: I can see the new (Pro) forum, but it's listed as...

    I can see the new (Pro) forum, but it's listed as "private" and I can not see the posts - what's up?
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    Poll: Care to give an example of a controls based...

    Care to give an example of a controls based conversation best held behind closed doors?

    Convince me :)
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    We did some Crestron integration (RS-232) and it...

    We did some Crestron integration (RS-232) and it wasn't black and white, nor was there any decent documentation (on the Crestron side).

    But when we sat the Crestron guy with our guy in a room,...
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    Poll: A PRO board equals an elitist board. I can't...

    A PRO board equals an elitist board. I can't support that. The signal to noise ratio here is completely acceptable and change for the sake of change rarely ends in a successful outcome.

    Leave...
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    First the borders close up. Then the requirement...

    First the borders close up.
    Then the requirement for travel papers by citizens and residents in instituted
    Then it's deemed legal to perform citizenship checks by the local police
    Then all other...
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    That's correct. Building pressure is a function...

    That's correct. Building pressure is a function of how much "new" air is introduced to a building (or a balloon) and how much of that "new" air is removed. The only two things that have the ability...
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    Maybe I'm slow - but I'm not getting your...

    Maybe I'm slow - but I'm not getting your example...
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    Agreed - but I'm talking about systems I engineer...

    Agreed - but I'm talking about systems I engineer and I install (I can't control what others do) but I'm not seeing the relevance of your comment.



    yes, I do see it as a non-issue. Building...
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    OK - work with me on the balancing part, I'm not...

    OK - work with me on the balancing part, I'm not understanding how static reset can affect balance.

    True VAV is pressure independent and the individual zone airflow requirements are met on a...
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    Which part of it touches your concerns? Did you...

    Which part of it touches your concerns? Did you read this part?

    "The intent of these control strategies is to reduce air handler capacity in ways that improve energy efficiency"

    and this part?...
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    tree hugger pacification solution? huh? Freddy...

    tree hugger pacification solution? huh?

    Freddy - this is so small (in terms of effort), I don't even associate a value to it when I include it as part of what I do. I'm not sure what you want for...
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    I stuff an array with the required values...

    I stuff an array with the required values (cooling effort, damper positions etc.). As I indicated, I ignore the problem zones (vale open too far etc.) and also ignore any "empty" pigeon hole in the...
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    Dave2142 - the first document I posted is from...

    Dave2142 - the first document I posted is from the Ca Gov't. the second is for ASHRAE journal and the third is a commercial document, but still makes good reading.

    The savings are in the fan...
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    Obviously more network traffic than there would...

    Obviously more network traffic than there would be if this wasn't in effect, but it's never been an issue (on 78K LON).
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    No numbers - wish I did, but the premise is...

    No numbers - wish I did, but the premise is simple - allow the fan to ride the backside of the fan curve as much as possible. Even if all the boxes are at minimum, the fan will have to run at a...
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    Static pressure reset, when done right falls into...

    Static pressure reset, when done right falls into the category of "low hanging fruit" when it comes to energy savings. It's not at all difficult. I explained it here (scroll down to my post)
    ...
  23. Thread: Interesting

    by nikko
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    I read the Alerton article, until I got to this...

    I read the Alerton article, until I got to this part:

    "High-technology and industrial market analyst firm Frost and
    Sullivan predicted in its 2002 report, “North American Building
    Automation...
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    Incentive systems?

    Without divulging anything personal, I'm curious if folk can converse about their various incentive plans in the land of DDC. Specifically I'm looking at:

    New construction sales:

    Base salary
    ...
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    On switchover, divide your current pump #1 run...

    On switchover, divide your current pump #1 run rate (PID output) by two (you want this value to result in less than the desired flow when both pumps are running, but not less enough to cause any...
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    F&S have no credibility with me. They did..then I...

    F&S have no credibility with me. They did..then I learned they're an "award for hire" outfit..nothing at all to them when you peel back the curtains.
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    I'd put that manufacturer to the curb in a heart...

    I'd put that manufacturer to the curb in a heart beat and do everything possible to make sure their business practices were known and that they never sold another thing near me.

    I love...
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    Meaning that f I lose the customer ('cause I...

    Meaning that f I lose the customer ('cause I screwed up), and that customer calls the factory for support, at that point, the manufacturer doesn't "owe" me anything wrt that customer (though I hope...
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    Laptop power is typically transformer de-coupled...

    Laptop power is typically transformer de-coupled - should not matter if it's plugged in or not.
  30. Replies
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    Interesting thread - and once again, proof that...

    Interesting thread - and once again, proof that we as an industry are as unique as the day is long..

    LON vs BACnet:

    I was born to this industry with SNVT's in my bloodstream. Not any more. I...
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    We agree - completely

    We agree - completely
  32. Replies
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    Got it, but let's be clear to draw the...

    Got it, but let's be clear to draw the appropriate line on the sand:

    As an Integrator - you do not have to "pay for an FTT spec", or any spec in order to take advantage of LonMArk certified...
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    control_8: I believe those specs you listed...

    control_8:

    I believe those specs you listed are used by manufacturers who want to assure their product (firmware/hardware/software) meets the technical guidelines for product development.
    ...
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    Not sure where the "buy the spec" stuff comes...

    Not sure where the "buy the spec" stuff comes from - here's a free one (down-loadable WORD file):

    http://www.lonmark.org/technical_resources/guidelines/docs/LonMarkOpenSpecification.doc

    US Army...
  35. Replies
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    Yabut, that's BACnet/IP - this discussion ...

    Yabut, that's BACnet/IP - this discussion pertains mostly to BACnet MS/TP (field bus level).

    Cool looking little controller though
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    :)

    :)
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    control_8 - you gonna actually offer something...

    control_8 - you gonna actually offer something here? Or are you content to sit back and snipe.

    I've got no problem with a lively conversation, but there's a time to let a thread go.

    If you've...
  38. Replies
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    Respectfully, I disagree. This argument while...

    Respectfully, I disagree. This argument while repetitious, is also dynamic as both technologies are constantly changing and so to do the justifications for backing one or the other.

    As long as...
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    Viconics have worked out the bugs on their BACnet...

    Viconics have worked out the bugs on their BACnet stats now. I use them because they are simple and they work.
  40. Replies
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    Interesting that one specific company has...

    Interesting that one specific company has engineered a solution to what could be (and has been) a catastrophic problem (as far as a network goes). Kudos to Reliable.

    I've only ever had two types...
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    Just curious how you compare these two, when even...

    Just curious how you compare these two, when even though they do similar things, they're really very different. LonTalk is a protocol, BACnet is a networking specification that makes use of RS485 as...
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    At the risk of wading in here, if I read this...

    At the risk of wading in here, if I read this correctly, you're a proponent of polarity sensitivity on a network. I'm curious why you think that's a benefit?
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    And just to muddy the waters, AX technology has...

    And just to muddy the waters, AX technology has come far enough that I actually will design forward (if it makes sense) using more than one protocol in one facility. In general, this is not good...
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    I thought JCI bought GM?

    I thought JCI bought GM?
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    This has been a problem from the beginnings of...

    This has been a problem from the beginnings of BACnet, but one I thought would work itself out long ago. Unfortunately I was wrong and it's apparent that within ASHRAE's decision process, greed has...
  46. Thread: DDC Wiring

    by nikko
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    Conduit to/at/near/beside the device, flex (12"...

    Conduit to/at/near/beside the device, flex (12" max) from there to the device.

    If you're on my job and I find "plain plenum" wire in a mech room, you're no longer on my job.
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    Operations software?

    Curious what you guys are using for your Operations software (scheduling, project management, estimating, procurement etc.)?
  48. Thread: Voyant

    by nikko
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    Excellent crew behind the company though...

    Excellent crew behind the company though...
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    If a MAT is truly not possible, and you still...

    If a MAT is truly not possible, and you still want to use OA to control humidity, And you have modulating heat (which is good) we're back to discharge air temp control. You'll want to do a simple...
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    Cost of doing it right isn't a lot more than the...

    Cost of doing it right isn't a lot more than the cost of doing it wrong, but it's a lot cheaper than doing it twice. I'm hired because I understand controls. It's my job to put forth a solution to...
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