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  1. Replies
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    A 4ton air handler will move about 1600cfm;...

    A 4ton air handler will move about 1600cfm; through a 20"x25" filter that's about 460fpm. PD for a new merv 10 is about .23" to .25"wc at approx 480fpm. Typical recommended pd change point is .75"...
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    915

    Rhino32713: Please don't cut-n-paste Google...

    Rhino32713:

    Please don't cut-n-paste Google searches, it's like that joke about teaching pigs to sing.

    Anyway, the closer a filter is to the fan intake, the cleaner your system will be; less...
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    1,253

    Did you reboot the JACE? Changes won't take if...

    Did you reboot the JACE? Changes won't take if you don't reboot. Also it might be the DNS. Use the host's IP address or you can set up the JACE with a DNS server.
  4. Where do you live, or want to work? What city &...

    Where do you live, or want to work? What city & state?
  5. Replies
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    3,004

    'Yer cold

    'Yer cold
  6. Replies
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    770

    You can buy a new, warrantied, properly...

    You can buy a new, warrantied, properly engineered Donaldson brand for anywhere from $1500 to $6,000. 'Plug-n-Play'.

    You could probably wing-it, but the minute someone gets sick, and sues you and...
  7. Replies
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    29,990

    "Hello, I'm Rick" probably would have been a...

    "Hello, I'm Rick" probably would have been a better introduction. Plus:

    1)What you do for a living.
    2)State & City where you work?
    3)What your professional experience is.

    Please read THIS
  8. Replies
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    1,141

    Follow Chiller Man's directions. But here's a tip...

    Follow Chiller Man's directions. But here's a tip for the older (mid 90's) chillers: the first 30GXs didn't have O-rings on the oil level sensor fittings and tended to leak there (among other...
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    3,421

    Brilliant!

    Brilliant!
  10. Replies
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    3,421

    You've just sold me. I'm going to try SG for...

    You've just sold me. I'm going to try SG for everything now.
  11. Replies
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    3,421

    I did a quick search and it looks like your plan...

    I did a quick search and it looks like your plan to use simple green is a good one. I didn't think it would dissolve dried ink, but many people have used it with success.

    I've heard "Gonzo" works...
  12. Replies
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    3,421

    What type of ink? You'll probably need some kind...

    What type of ink? You'll probably need some kind of solvent.

    Nice clean removal BTW
  13. Replies
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    912

    That's very cold, even for a data center. Despite...

    That's very cold, even for a data center. Despite what the IT guys say, the best environment for electronics is a steady 70° - 72°f at about 50% RH. Too cold and you can get condensation forming...
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    1,895

    What is the nature of the noise? Is it a 'sound',...

    What is the nature of the noise? Is it a 'sound', or is it vibration felt inside the building? Is it a mechanical or an 'air' sound? Is it steady, rythmic, rattling, rumbling, thumping, whooshing,...
  15. Thread: fan law

    by HeatXfer
    Replies
    7
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    813

    Yes to the traverse. Can you see condensation...

    Yes to the traverse. Can you see condensation overflowing the pan and running down the duct, or condensation being pulled off the coil by high air velocity?

    What it is design CFM and what are the...
  16. Replies
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    642

    I can never remember the exact wording of all...

    I can never remember the exact wording of all those alarms, anyway, glad to you got it worked-out.
  17. Replies
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    712

    The software for the touch screen should be on...

    The software for the touch screen should be on the cpu's flashdrive. A quick way into the system without using the touch screen is to get a regular keyboard: with either a usb or the old PS2...
  18. Replies
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    642

    I haven't seen any lit on this either, but if...

    I haven't seen any lit on this either, but if you're familiar with the machine you should be able to discern whether or not you're leaking-by by reading the line pressures at the lube box while you...
  19. Replies
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    712

    Drivers for the Windows CE OS touch screen can be...

    Drivers for the Windows CE OS touch screen can be found here. Or you can get them from McQuay. Is your chiller a new MicroTech II or has it been upgraded with a new MicroTech II control panel with...
  20. Replies
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    3,025

    I don't recommend bypassing the oil level switch;...

    I don't recommend bypassing the oil level switch; if there isn't enough oil to maintain lubrication the damage to an 06N can be catastrophic, and compressor replacement is inevitable. Carrier's...
  21. Replies
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    1,256

    Don't knock it 'till you've tried it! Originally...

    Don't knock it 'till you've tried it! Originally from S.E. Ohio, just down river from Amish country.

    We should really go back to the gold standard, eliminate the Federal Reserve Bank, re-institute...
  22. Replies
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    1,256

    Depends on what you mean by "too bad"

    Depends on what you mean by "too bad"
  23. Replies
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    3,426

    Now these are all verifiable facts without the...

    Now these are all verifiable facts without the rhetoric.
    - Citation needed

    None of the items on my list are rhetorical; he did those things. My statements manipulative? I'm certainly not trying...
  24. Replies
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    3,426

    Opinions and facts...there's an interesting thing...

    Opinions and facts...there's an interesting thing about facts: everyone is entitled to learn them, but many prefer not to let them interfere with their preconceived notion of the world.

    Besides,...
  25. Replies
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    3,426

    "The worst technicians are the brand bashers of...

    "The worst technicians are the brand bashers of the world. Not because they are bad techs, but because they have bad attitudes.
    Professional technicians have no overall problems with any brand and...
  26. I've seen these digital wireless pneumatic stats...

    I've seen these digital wireless pneumatic stats at my local RSD, and I've talked to a couple mechanics who's opinions I trust that have installed these; They were pleasantly surprised with the end...
  27. Replies
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    1,092

    Unfortunately, this is becoming more typical of...

    Unfortunately, this is becoming more typical of "controls" contractors: the guy programming the controls simply doesn't have a complete understanding of what he's trying to control.

    Make him prove...
  28. Replies
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    5,590

    Here is one possible solution with the filter...

    Here is one possible solution with the filter outside the cabinet. (notice the radius at the bottom of the return riser?)

    A simple clip like this or a wire bail can hold the filter against the...
  29. Replies
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    5,590

    My fault for not asking up front. I just assumed...

    My fault for not asking up front. I just assumed you had a large common cold air return in a hallway.

    I'd need to know the duct sizes and cfm from each return and a layout of how the run is ducted...
  30. Replies
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    5,590

    I got the unit specs from here....

    I got the unit specs from here.

    I don't remember what page, it's a catalog, but it shows dimensions and install info.

    Oh boy, I just read the spec sheet. Looks like .9 esp is ok. You're within...
  31. Replies
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    5,590

    Correct: that's with a properly sized return. ...

    Correct: that's with a properly sized return.

    FPM through the MERV 13 would be 571fpm : 20"x25"= 500sq"/144= 3.47sq'

    1984cfm/3.47sq'= 571fpm

    (1400cfm/1984cfm)x(1400cfm/1984cfm) = .497 X .387...
  32. Replies
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    5,590

    That particular air handler is sized for a 3 -...

    That particular air handler is sized for a 3 - 5ton condensing unit and coil. The blower motor is multi-speed to accommodate the range, so that's not a problem.

    If you've got a 3½ton CU & coil,...
  33. Replies
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    It's very cliché, but: 1) Short hair 2) A...

    It's very cliché, but:

    1) Short hair
    2) A sincere "Yes Sir, no Sir"
    3) Be honest
    4) Be willing to work on anything you're handed
    5) They know you don't know everything, so be willing to ask...
  34. Replies
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    I think pretty much everyone commenting spotted...

    I think pretty much everyone commenting spotted the problem right away.

    From the spec sheet:

    Filter size: 20"x25" (Approx 400sq" face)

    Return inlet size: 14"x22" (308sq"). Your current inlet...
  35. Replies
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    29,990

    Oof! I forgot about this thread! Our resident...

    Oof! I forgot about this thread! Our resident 'mechanic-hurt-his-back-so-now-he-works-in-the-office-computer-dude' set it up for me.

    It also runs Carrier Comfort Tech, Service Tool, MTECH, Trane...
  36. Thread: Unbelievable

    by HeatXfer
    Replies
    13
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    761

    He was a lawyer first and he has never had a job...

    He was a lawyer first and he has never had a job in the private sector as a professional: he's been living off the public since '72.
  37. Replies
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    16,753

    Copper nat gas lines used to be illegal in Calif....

    Copper nat gas lines used to be illegal in Calif. The Mechanical code says it's OK, plumbing code says no.

    Go figure
  38. Thread: Unbelievable

    by HeatXfer
    Replies
    13
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    761

    This is a clear sign there are too many lawyers...

    This is a clear sign there are too many lawyers and too little common sense.
  39. Replies
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    1,928

    A friend who lives in Ireland started a muffin...

    A friend who lives in Ireland started a muffin business a couple of years back. Her name is Naomi, she calls her business Naomi's Muffins, and it's doing very well. She supplies her 'American' style...
  40. Replies
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    5,224

    When you say "freeze stat", are you talking about...

    When you say "freeze stat", are you talking about a low pressure or temperature switch on the refrigeration circuit?
  41. Replies
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    1,011

    They will probably want to sell you an "open...

    They will probably want to sell you an "open processor" that requires a custom driver with points mapped to your system.

    Siemens already has 'off-the-shelf' hardware (processors) with appropriate...
  42. Replies
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    2,517

    Pay for the password: The cost of a 1hr service...

    Pay for the password: The cost of a 1hr service call is well worth learning the password. Place that call, and do what so many customers do to me: hover over their shoulder and ask to be shown the...
  43. Are you happy with the system you have? Is it...

    Are you happy with the system you have?
    Is it end-user friendly, or do you rely on your contractor for every little thing control related?
    Are you happy with the service provided by your current...
  44. Thread: Polychains

    by HeatXfer
    Replies
    5
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    512

    asjc: Thanks for bringing this up. I hadn't heard...

    asjc: Thanks for bringing this up. I hadn't heard of replacing standard air handler belt drives with synchronous drives. Although initial alignment looks to be critical (compared to standard Vbelt...
  45. Thread: Any Idea?????

    by HeatXfer
    Replies
    4
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    599

    I'm surprised there's any 22 left in the machine....

    I'm surprised there's any 22 left in the machine. Didn't most of it go into the chilled water loop and get vented by the autovents?
  46. Replies
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    816

    Wait, I thought Bush and Cheney were out?

    Wait, I thought Bush and Cheney were out?
  47. Replies
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    3,034

    True, but "work"? I see a lot of guessing (I did...

    True, but "work"? I see a lot of guessing (I did it too). There are three facts we need but don't have:

    1) Is the fan speed constant?
    If speed is constant, the problem is not electrical.
    2)...
  48. Replies
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    1,145

    General computer training won't give you an...

    General computer training won't give you an advantage over someone else in the controls field, and it won't benefit your employer unless they need an IT guy too.

    The greatest value a DDC guy can...
  49. Replies
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    3,034

    More like "Blown fuse, damaged motor & start cap...

    More like "Blown fuse, damaged motor & start cap on service call. Replaced fuse, motor & cap. Motor operation is now unstable. Left job. Have no idea what is happening even though I went back and...
  50. Replies
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    1,689

    1/64th" deflection for every inch shaft center to...

    1/64th" deflection for every inch shaft center to shaft center.
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