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  1. Replies
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    I gotta hear this. Please explain. I work in...

    I gotta hear this. Please explain. I work in that district and don't have a clue what you're talking about.
  2. Very good advice here.

    Very good advice here.
  3. 3D scrolls are not approved by Trane for...

    3D scrolls are not approved by Trane for conversion. There is a very very very very long list of oil return problems on POE oil. You can buy units setup by the factory for 407C, those use...
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    I agree with NYRB, the towers should have been...

    I agree with NYRB, the towers should have been piped reverse return to balance the flow. Other than that, I just have some minor observations at first glance, nothing glaring.
  5. Thread: TU service tool

    by JCN
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    36,373

    Yes there is a password for the screws with a...

    Yes there is a password for the screws with a UC800. It was finally added after we complained enough about plugging in the laptop in the rain, just to change a temp sensor.
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    So, on an initial start command, the 1/3 valve...

    So, on an initial start command, the 1/3 valve will receive a call to open to minimum position. These are usually 0-10 or 2-10 VDC. Then based on head pressure, the valve will continue to open as...
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    Certified payroll can be a royal pain in the ass....

    Certified payroll can be a royal pain in the ass. If there isn't enough work to justify the different classifications, then it isn't uncommon for a company to only declare and certify 1 or 2 rates...
  8. Thread: Three fuses

    by JCN
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    3,285

    That would be my guess as well. I have...

    That would be my guess as well. I have encountered chillers with all 3 fuses blown before and it was usually the result of a building transformer issue or power company blip.

    In your case, I...
  9. Thread: Riello sweetness!

    by JCN
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    1,002

    I looked at those at the AHR show. Nice, but a...

    I looked at those at the AHR show. Nice, but a lot of stuff in a small box. I prefer a more traditional design in anything above 400k. Too many safeties for them to cram in a small box. It is...
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    The secret here is lift across the compressor. A...

    The secret here is lift across the compressor. A rule of thumb is that the entering condenser water has to be a minimum of 15 degs warmer than the leaving chilled water temp. Keep in mind that it...
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    What chillrdude said..... We have all spent...

    What chillrdude said.....

    We have all spent way too many days shaking our heads as morons try to "optimize" a plant, then complain because now the plant doesn't run right. Must be the equipment's...
  12. Thread: Chillers

    by JCN
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    There is no software that can interface with...

    There is no software that can interface with every brand of chiller. Each manufacturer has their own platform, except for York, which doesn't require a laptop to perform service tech functions. ...
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    I don't know any numbers involved in the layoffs,...

    I don't know any numbers involved in the layoffs, but I have a couple of friends that are chiller mechanics for Carrier here. Ran into one of them in the supply house on Friday. He told me that...
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    Can we somehow make Mikey's post required reading...

    Can we somehow make Mikey's post required reading before anyone is allowed to post?
  15. Replies
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    Rule #2 for crane picks....Never, ever, never...

    Rule #2 for crane picks....Never, ever, never stand under a load. Ever......

    Shackles break, straps break, etc....

    Oh yeah, hard hats are stupid in this case, but OSHA doesn't think so.
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    A couple week's rental on that heater could have...

    A couple week's rental on that heater could have paid most of the dry cooler costs.
  17. Replies
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    If you look deep enough, you will find out that a...

    If you look deep enough, you will find out that a very large quantity of what has been purchased over the last couple of years has been reclaimed refrigerant. Very little true virgin R-22 is still...
  18. Replies
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    My wife tells me that is caused by old age. Not...

    My wife tells me that is caused by old age. Not sure how old you are, but I'm just saying......
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    No enlargement here either. Still waiting...

    No enlargement here either. Still waiting though.

    R11 was the greatest degreaser ever invented, and it didn't burn like hell when you sit on the rag. Unlike Zep. I put my leg on a Zep rag...
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    I work with 123 pretty much everyday. No side...

    I work with 123 pretty much everyday. No side effects that I'm aware of. At least not yet.

    Carrier made these wild claims several years ago that it caused testicular enlargement. I wish it...
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    There are still a few franchises left. But not...

    There are still a few franchises left. But not many. Maybe 5???
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    X3. Except for the VFD conversion part. Happy...

    X3. Except for the VFD conversion part.

    Happy New Year to you too, standbyyourword
  23. Replies
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    I'll bite, because I was on-call last night and...

    I'll bite, because I was on-call last night and got zero sleep, plus I'm old and angry.


    It ain't NPT dude. That compressor can hold about a gallon of oil, depending on conditions. Ask me how I...
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    You would be shocked as to what can be captured...

    You would be shocked as to what can be captured in an accounting metric. I was....
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    You are correct, they have had their heads in the...

    You are correct, they have had their heads in the sand for a long time. At least 2 of the Big 3 OEM's has begun aggressively trying to figure out the R&R (recruitment and retention) problem. The...
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    The reality in all of this....is that the...

    The reality in all of this....is that the pendulum has shifted. For those of us that started in the trade more than 25 years ago, the employers or the union used to have the upper hand. We used to...
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    That's a good point. I've never used TechView,...

    That's a good point. I've never used TechView, only KestrelView. So I never gave that much thought. KestrelView only works uploading the configuration about half the time anyway, so I just plan to...
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    This is what happens when Home Depot sells stuff...

    This is what happens when Home Depot sells stuff that they shouldn't be allowed to.
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    As long as you have TechView it is pretty simple.

    As long as you have TechView it is pretty simple.
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    I have quite a few accounts with YK's that I take...

    I have quite a few accounts with YK's that I take care of and have none with this issue. I've also never heard of it from other chiller mechanics. I agree with Benny that it sounds like a technique...
  31. Thread: ghost voltage ??

    by JCN
    Replies
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    1,171

    I am also having trouble following your...

    I am also having trouble following your arrangement. Any chance you could post a hand drawn schematic?

    There is no such thing as ghost voltage. It has to come from somewhere and doesn't just...
  32. Replies
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    There is no setting for this. It is generating...

    There is no setting for this.

    It is generating the alarm because you are at risk for damaging the barrel. The IOM requires that the chiller control the evap pump for freeze protection. If the...
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    You ain't gonna get the charge out in 4 hours. ...

    You ain't gonna get the charge out in 4 hours. It will take you that long to set it up and push the liquid out. Then at least that long to get the vapor.

    I've done the whole block a couple of...
  34. Just a word of advice...you won't get much of a...

    Just a word of advice...you won't get much of a response out of this crew without some mention of salary range and expectations. All the pro members here already have jobs and the only thing that...
  35. Thread: nelson11

    by JCN
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    :cheers: Yup. It's more betterer.

    :cheers: Yup. It's more betterer.
  36. Replies
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    Theoretically you are correct, but there isn't an...

    Theoretically you are correct, but there isn't an adequate volume of refrigerant being boiled off to cause a freeze in most situations. If you push all the refrigerant out of the machine, like...
  37. Thread: nelson11

    by JCN
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    I will add a X3 or X4 to the above diagnosis.

    I will add a X3 or X4 to the above diagnosis.
  38. Replies
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    Same here and a great point. When the dew point...

    Same here and a great point. When the dew point is in the high 70s and low 80s, everything sweats all the time. I always drain the evap. Maybe I'm wrong, maybe not, but it's what I do.
  39. Replies
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    While I am rapidly tiring of this argument, I...

    While I am rapidly tiring of this argument, I will make one more observation.

    I have personally seen large scale inductors that would not show a short with a DMM but will show it quickly with a...
  40. Replies
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    Are those pressures and temps in F and psig? ...

    Are those pressures and temps in F and psig?

    You've got a 107 deg F condenser temp with a 24.2 psi condenser pressure. That's a 15 deg condenser approach. Either you've got a ton of air in the...
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    Yup. I've got a funny story for you Benny, that...

    Yup. I've got a funny story for you Benny, that I'll send you offline. It's related to reading DC bus voltage on a Frame 4, 1200 ton machine.
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    From our standpoint, it is the rating of the...

    From our standpoint, it is the rating of the equipment. If the equipment is built/rated for 600V, then it doesn't matter if actual is 605 or 608. It's still 600V.
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    Thanks Marc.

    Thanks Marc.
  44. Replies
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    Why doesn't my like button work anymore?

    Why doesn't my like button work anymore?
  45. Replies
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    There is 600V in some parts of the US. We have...

    There is 600V in some parts of the US. We have one site that has 575 on it. We usually see medium stuff at large sites and in industrial settings.
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    No, just work for the same company in different...

    No, just work for the same company in different parts of the country.
  47. Replies
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    That's right. It's on that stupid site...

    That's right. It's on that stupid site assessment thing we're supposed to do before every job. :whistle: :whistle:
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    I can never remember where 600V falls in that...

    I can never remember where 600V falls in that scale. Is 600 in medium voltage or the last step of low voltage? It doesn't really matter, it will bite the hell out of you either way.
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    I concur. No medium voltage drives here either. ...

    I concur. No medium voltage drives here either. I have had megger readings cause me to question a screw compressor and dig deeper before condemning it. The meg reading is never enough by itself to...
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    We record the information yearly on our annual...

    We record the information yearly on our annual inspections. Not sure if that truly qualifies at trending, but we do have data to look at if something starts to change. In a chiller, moisture will...
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