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Type: Posts; User: nikko

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  1. Replies
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    21,996

    You can't be serious?

    You can't be serious?
  2. Replies
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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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    452

    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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    2,596

    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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    6,260

    Poll: Worked, thanks

    Worked, thanks
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    6,260

    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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    6,260

    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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    4,407

    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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    2,152

    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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    8,865

    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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    8,865

    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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    8,865

    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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    8,865

    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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    8,865

    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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    109
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    8,865

    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
    Replies
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    3,152

    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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