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Type: Posts; User: jayguy

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  1. Replies
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    I disagree. Perhaps some people need to change...

    I disagree. Perhaps some people need to change because they don't know who the hell they are and they are searching for the answer. I know that people don't necessarily stick with the same company...
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    I checked that out first...it is the saturation...

    I checked that out first...it is the saturation temperature.
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    After looking over your data I have some notes. I...

    After looking over your data I have some notes. I know you are only asking "Why is Circuit #2 higher in discharge pressure than Circuit #1?" I believe the following is why...

    Suction pressure of...
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    I hope I am wrong, however, you might be buying...

    I hope I am wrong, however, you might be buying them some repairs or a new unit. If the water temp sensors fail and they have someone else come in to diagnose the issue, they may find that the low...
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    It may be that the unit was designed for this...

    It may be that the unit was designed for this higher pressure too. I don't have the specs for this system, but you might want get them.

    What was the leaving air temp? Did you compensate for any...
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    a stainless steel heat exchanger is not going to...

    a stainless steel heat exchanger is not going to be very efficient....compared to a copper heat exchanger. I don't think that a stainless steel heat exchanger was an option on that model so it is...
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    And your suction superheat is... And your...

    And your suction superheat is...
    And your subcooling is...

    SS evap? That explains the approach...at least most of it. As for the water side, you will need to tap into it or SWAG it.
  8. What if your meter is reading 15 and it is...

    What if your meter is reading 15 and it is actually slugging? A system with too much oil will do just that. Slug, starve, slug, starve.

    If you are only looking for charge loss, a discharge temp...
  9. Most technicians don't even know what superheat...

    Most technicians don't even know what superheat IS...now we want to throw a black box at them? It would be condemned on every job or jumped out at the first trip.

    Some of it is legal...
  10. Just got my brand new quadcopter stuck in a tree...

    Just got my brand new quadcopter stuck in a tree this evening. Got it for my bday 3 days ago....we can't have anything nice.
  11. It is and has and always will be about the...

    It is and has and always will be about the dollar. Any company in business that isn't about "the dollar" is doomed to fail.

    The difference between good and bad companys is WHICH dollar is most...
  12. Thread: Trane TR-200

    by jayguy
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    372

    while it is true that the amps are probably high...

    while it is true that the amps are probably high due to the lack of ductwork, it is also true that if the motor output is at 60 Hz, then the voltage output should also be nameplate voltage...lots of...
  13. Thread: Trane TR-200

    by jayguy
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    372

    At 60 Hz, you should be at rated voltage...well,...

    At 60 Hz, you should be at rated voltage...well, pretty close to the incoming power anyway. You could have 1 or 2 things going on if you have good quality power coming in.

    1: incorrect...
  14. Thread: Trane TR-200

    by jayguy
    Replies
    12
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    372

    The drive is not going to ever put out its rated...

    The drive is not going to ever put out its rated voltage until it is at its rated speed. Depending on configuration, it will roughly put out 50% of its voltage at 50% of its speed...it's not that...
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    I have heard a couple of stories about that. We...

    I have heard a couple of stories about that. We got a call about one of our guys was dead in his work van in this farmers field. Farmer called the cops. Turns out the tech was at the casinos all...
  16. Thread: Drake Chiller

    by jayguy
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    836

    How to never get help again starring.....you! An...

    How to never get help again starring.....you! An apology goes a long way. Posters around here have friends who can help...or not.
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    You could take him to lunch AND pay for it out of...

    You could take him to lunch AND pay for it out of your own pocket (make sure this part is evident early in the conversation)...this goes a long way and people open up like this. I have done this...
  18. People like choices. I would recommend that you...

    People like choices. I would recommend that you sit down with the customer and discuss what appears to have happened currently and in the past.

    If the customer wants to use you AND his son, no...
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    Try it on a hospital when surgery is happening....

    Try it on a hospital when surgery is happening. The switch gear transfered because of the chiller starting up. It took about 8 seconds to transfer to the generator and provide power. It felt like it...
  20. Thread: Favorite VFD

    by jayguy
    Replies
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    5,504

    let's try it as an attachment. let me know if...

    let's try it as an attachment. let me know if that doesn't work either.
  21. That reminds me of a story... I was doing a PM...

    That reminds me of a story...

    I was doing a PM on a large outdoor make up air unit. I put my manometemonnit and checked everything out...all ok. Took my stuff off and forgot to put the 1/4" MPT...
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    I think that you probably were the straw that...

    I think that you probably were the straw that broke the camels back on the MRI. Did YOU break it? Probably not. My guess is that you caused the failure before a good thunderstorm could get...
  23. Thread: Static Pressure

    by jayguy
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    1,184

    It sounds more like the OP wants an airflow...

    It sounds more like the OP wants an airflow tutorial. Static pressure readings are easy to misinterpret.

    While taking the measurements is USUALLY pretty easy and straightforward, you can get...
  24. Thread: Favorite VFD

    by jayguy
    Replies
    49
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    5,504

    If the bus voltage is good, the drive caps are...

    If the bus voltage is good, the drive caps are good...FOR THAT LOAD. At higher loads, the caps may not be good enough and you would start to fail on a drive output fault that would affect all of the...
  25. Thread: Favorite VFD

    by jayguy
    Replies
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    5,504

    attached is what your drive output kind of looks...

    attached is what your drive output kind of looks like...561631

    as you can see, your regular ol' DMM isn't going to be able to accurately interpret the voltage. secondly, your regular ol' DMM will...
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    lots of wholesale houses sell the Anderson...

    lots of wholesale houses sell the Anderson Forrester kits...its what i use.

    http://andersonforrester.com/product/gauging-kit-drills-40-80-heavy-shank-metal-box/
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    I have drilled them out but not very many times....

    I have drilled them out but not very many times. Make sure you get a quality orifice drill bit set.
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    I am not sure where you are physically located,...

    I am not sure where you are physically located, however, 77F year round out of a cooling tower might be difficult. But you are correct, it is possible that you could have that water temp a lot of the...
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    I called it! Sorry but I couldn't resist. I...

    I called it!

    Sorry but I couldn't resist. I don't know anything about that chiller.
  30. Thread: Favorite VFD

    by jayguy
    Replies
    49
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    5,504

    Check what? Look for what?

    Check what? Look for what?
  31. Thread: Favorite VFD

    by jayguy
    Replies
    49
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    5,504

    I don't have that meter, but it would be my first...

    I don't have that meter, but it would be my first choice of the DMM type for drives.
  32. Thread: service manuals

    by jayguy
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    "Back in the day", although I wasn't a huge part...

    "Back in the day", although I wasn't a huge part of that either, you saved magazine articles and actually went to schools and kept the paper manuals. The paper manuals didn't seem to change as much...
  33. Thread: service manuals

    by jayguy
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    Can anyone say "low bidder"?

    Can anyone say "low bidder"?
  34. Replies
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    Feelings are sometimes good. Sometimes bad. Check...

    Feelings are sometimes good. Sometimes bad. Check the valve. Find something downstream where you can isolate and break it open and see if you get flow.

    Also, did you rotate the valve manually? I...
  35. If a BAS system is now controlling anything...

    If a BAS system is now controlling anything except giving setpoints, then all bets are off about how the unit operates and why.
  36. But it will pump like crazy for a little while!...

    But it will pump like crazy for a little while! Wheeeeeeeeeee!!
  37. Replies
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    oh, trust me, i get it. most guys just roll a new...

    oh, trust me, i get it. most guys just roll a new belt on every year, never check alignment or change the sheaves and then complain about their customers never wanting to spend money or the company...
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    that's me!

    that's me!
  39. Replies
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    Sorry. Should be fixed now.

    Sorry. Should be fixed now.
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    i took this video this week about why string...

    i took this video this week about why string shouldn't be used.

    https://www.youtube.com/watch?v=pIiJn4jaMrQ

    you can see how the top side of the sheave has a non-uniform wall thickness, however,...
  41. EXACTLY what pressure do you have? '-3.5" WC' or...

    EXACTLY what pressure do you have? '-3.5" WC' or '+3.5" WC'
  42. Replies
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    Belt Hog...they made it too easy. ...

    Belt Hog...they made it too easy.

    http://www.vibralign.com/belt-alignment-tool/belt-hog/
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    Laser. Determining sheave twist is nearly...

    Laser.

    Determining sheave twist is nearly impossible with string.
  44. Replies
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    2,943

    I have seen them in catalogs....but not in...

    I have seen them in catalogs....but not in person. Bending the belt backwards shortens its life.
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    I use a belt tension and a laser alignment tool....

    I use a belt tension and a laser alignment tool. Then you won't ever have to go back. I have some belts that look perfect after over 7 years of use. Keep in mind that the belt tension tool chart will...
  46. Where are you measuring the different gas...

    Where are you measuring the different gas pressures? Natural or LP? Line pressure? Is this a 2 stage burner or a modulating burner?
  47. Replies
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    Exactly. However, if the hot gas is piped all the...

    Exactly. However, if the hot gas is piped all the way to the evaporator, why not pipe it between the TXV and the evaporator? That's the best way anyhow. Then you an eliminate the liquid injection...
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    So liquid injection is directly into the suction...

    So liquid injection is directly into the suction line? The suction line method works (although it's not my favorite) but the liquid and the hot gas are to mix just before entering the suction line or...
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    CBR reminded me...is the HGBP valve at the...

    CBR reminded me...is the HGBP valve at the evaporator or at the compressor....it needs to be at the compressor. If it is at the evaporator, then it would definitely condense refrigerant in that line...
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    shaking...when? always? only when the unit is...

    shaking...when? always? only when the unit is running? only when the hot gas bypass is running? due to the design of the hot gas bypass, if it is not setup properly, you could be injecting liquid...
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