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  1. Replies
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    This is interesting, never saw this. Do not do...

    This is interesting, never saw this. Do not do much residential. Does it usually get hot like he has mentioned?
  2. Replies
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    686

    Doesn't sound all that bad......they didn't burn...

    Doesn't sound all that bad......they didn't burn the place down at least! Did any of those guys hurt themselves or anyone else?
  3. Replies
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    686

    Were both winding open or just the primary?

    Were both winding open or just the primary?
  4. Replies
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    686

    Doing the math I seem to be wrong here. You...

    Doing the math I seem to be wrong here. You actually have less current in the primary. Perhaps this is why the primary winding ma have thinner wire if it does.

    Time Builder seems to be...
  5. Replies
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    686

    Just wondering how many guys install a fuse or...

    Just wondering how many guys install a fuse or one with a breaker when they replace a failed one. I always do if it will fit.
  6. Thread: Refractometer

    by Push It
    Replies
    7
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    534

    I use a Misco 7084VP. Really no complaints. But I...

    I use a Misco 7084VP. Really no complaints. But I haave never used any other one so I have nothing to compare it to.
  7. Replies
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    686

    I believe it is because the primary side will...

    I believe it is because the primary side will have more current due to having more winding. More of a guess but that seems to make sense to me.
  8. Replies
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    1,722

    I agree with this totally. I have the feeling we...

    I agree with this totally. I have the feeling we will find the HGBV failed close to wide open. The valve in this unit is an electric stepper valve. They do seem to fail a lot. Gravity may be onto...
  9. Replies
    29
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    1,722

    That 40% is for the whole unit. Assuming the...

    That 40% is for the whole unit.

    Assuming the Cooling% in the Status menu is the same as the percentage of heat load on the unit compared to it's nominal load, I was referring to knowing how the...
  10. Replies
    41
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    2,259

    If he makes the return larger it will slow down...

    If he makes the return larger it will slow down his velocity, no? The water is dripping off the coil before it can run down far enough to drip into the drain pan. The coil is a draw through. Maybe I...
  11. Replies
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    1,722

    We installed the first system in our state about...

    We installed the first system in our state about maybe 10 years ago, maybe less. The compressors blew up, and Liebert sent out an updated chip to put in the micro processor with the new compressors....
  12. Replies
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    1,722

    Are you saying that some disagree that it is...

    Are you saying that some disagree that it is worth while to look inside, or that once inside they disagree on failure type and cause? Who in their right mind would not think it is a good idea to look...
  13. Replies
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    1,722

    Flood back and the HGBV are high on my list. ...

    Flood back and the HGBV are high on my list.

    It does have a liquid line sol. valve. But I believe if it is leaking by the unit will throw an alarm for compressor short cycling. There has been no...
  14. Replies
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    1,722

    That's a good thought. I'm just not sure if it...

    That's a good thought. I'm just not sure if it would make a difference. The refrigerant flow is so fast I can't see how the position would effect it. Unless it was mounted so the valve was on the...
  15. Replies
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    1,722

    Sorry for the delay guys, been busy. Yeah it's...

    Sorry for the delay guys, been busy.

    Yeah it's nice how they slide out. I always have those gaskets on hand. I seem to have to replace the discharge service valve gaskets on everyone I run into....
  16. Replies
    29
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    1,722

    I have found bad stepper motors and bad boards...

    I have found bad stepper motors and bad boards causing the HGBVs to stay open.
    Do you think the capacity of the BGBV will overcome the TXVs ability to control the superheat?
    We have enough room at...
  17. Replies
    29
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    1,722

    There is a oil equalizing line. It is only 3/8...

    There is a oil equalizing line. It is only 3/8 unfortunately but it is there. It has a 1/4 schraider on it.
  18. Replies
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    1,722

    That's a good idea, but you won't be able to...

    That's a good idea, but you won't be able to clean a strainer out if it has one. I am wondering if I can call the TXV manufacture to find this out. I have seen some TXVs have screens and some not.
  19. Replies
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    1,722

    This is a Liebert XDC system. No compressors have...

    This is a Liebert XDC system. No compressors have ever been replaced.

    This system was installed and started about 5-6 years ago by another contractor who is reputable. I believe the job required...
  20. Replies
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    1,722

    Absolutely what's left of the bearing. Do you...

    Absolutely what's left of the bearing. Do you have any thought on if the paste/sludge is just from the silver mixing with the oil, or from the oil itself turning to sludge then also mixing with the...
  21. Replies
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    1,722

    Tandem Copeland Compressor Failure/POE Oil

    Guys

    Looking some some opinions, expeirences, and knoweldge.

    We lost a set of tandem Copeland scrolls a few weeks back. One of the compressors was very loud and not pumping well. When we...
  22. Replies
    35
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    1,324

    Never knew that was how you trapped a blow...

    Never knew that was how you trapped a blow through unit. I have about 4 RTUs to re-trap now at my site. Good spring work.
  23. Hey man by the looks of it they did not tape up...

    Hey man by the looks of it they did not tape up the unused fan speed wires. If this is similar to my Trane units you will have voltage to ground at those wires. I would tape them up if that is the...
  24. Replies
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    364

    Could you get a local duct cleaning company to...

    Could you get a local duct cleaning company to run a camera down the duct?
  25. Replies
    4
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    303

    I looked at that not more than a couple months...

    I looked at that not more than a couple months ago. I need them to get closer to me. My company will never send me to training that includes flying somewhere. It's a stretch just because it s a few...
  26. Replies
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    538

    I love the tending ability. Looks like a good...

    I love the tending ability. Looks like a good tool.

    But personally I like calculating the SH and SC on my own. Don't really know why. Just feel like I am understanding things better.

    To bad it...
  27. Replies
    4
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    303

    Good article. Simple and to the point with the...

    Good article. Simple and to the point with the time he is given.

    I'm interested in hearing who has taken some type of airflow training and what they took.

    Any service tech TAB or NEBB...
  28. Replies
    41
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    2,259

    Try to get a cut sheet up if the unit. Or at...

    Try to get a cut sheet up if the unit. Or at least post the M#. May help
  29. Replies
    41
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    2,259

    Has to be slanted. He said it drips off it worse...

    Has to be slanted. He said it drips off it worse when the unit shuts down.
  30. Replies
    20
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    1,056

    When you say "sweated" you mean brazed not soft...

    When you say "sweated" you mean brazed not soft soldered...correct?
  31. Replies
    41
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    2,259

    So the water only drips outside the pan when the...

    So the water only drips outside the pan when the fan shuts off? As long as it is running all condensate runs down the coil find and into the drain pan?

    The coils are slanted in the unit?

    It's...
  32. Replies
    41
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    2,259

    You lost me here. If it is dropping off the coil...

    You lost me here. If it is dropping off the coil as it should is it not dropping into the drain pan? If it is not I cannot imagine that it is not being blown off the coil.

    I go with a X3 on...
  33. Replies
    20
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    1,056

    If these units have been there for 12 years and...

    If these units have been there for 12 years and you are icing up I would start with airflow problems, then charge. Look at your returns, filters, fan wheel, evap coil, and anything else in the...
  34. Replies
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    1,056

    I'm sure you can look up the critical temperature...

    I'm sure you can look up the critical temperature of each refrigerant. But there is no way in hell you will ever see me braze this onto a pipe full of refrigerant. I don't care if god himself says it...
  35. Replies
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    Following

    Following
  36. Thread: RLA verses FLA

    by Push It
    Replies
    23
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    62,640

    Interesting thread, following.

    Interesting thread, following.
  37. Replies
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    1,756

    Hu I have the 87V. Never seen that button but I'm...

    Hu I have the 87V. Never seen that button but I'm going to look
  38. Replies
    8
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    445

    Put in a flow check if it does not have one. You...

    Put in a flow check if it does not have one. You are getting a ghost flow for sure it sounds
  39. Thanks Lonegun

    Thanks Lonegun
  40. Definite Purpose and General Purpose Contactors

    Anyone know the differences between the two? Is it just the wire connection type? Thanks
  41. Replies
    41
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    3,062

    I'd be more interested in the inside rack system...

    I'd be more interested in the inside rack system set up. Space, etc. than looks. In 3 years the ugly looking van will be the "In" style and you will look like a pimp.

    **** breaks. I'd look for who...
  42. Replies
    32
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    1,328

    X1000 You are trying to troubleshoot a system...

    X1000

    You are trying to troubleshoot a system which you have not even determined how it is installed and designed to operate yet. Or you choose not to give all the info up front. This system is...
  43. Thread: Humidifiers!

    by Push It
    Replies
    8
    Views
    412

    I have a few Humidifirst humidifiers in a...

    I have a few Humidifirst humidifiers in a facility. They are ultrasonic humidifiers and must use DI water. They work great and there is practical no maintenance since you have no minerals, sludge or...
  44. Replies
    8
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    659

    Are you saying the internal overloads a=on the...

    Are you saying the internal overloads a=on the compressor tripped? If so how do you know? Is there an error code for that? I have worked on a lot of HPs and have never seen an error code for that.
  45. Replies
    32
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    1,328

    Did you check the DA temp? Are you sure it is not...

    Did you check the DA temp? Are you sure it is not in heating? I know you tried to different units, but just wondering.

    Also when you say it is tripping out, what is it tripping on? High press?
    ...
  46. Replies
    8
    Views
    659

    X2 How about indoor conditions, ambient,...

    X2 How about indoor conditions, ambient, pressures, temps. Airflow? Is your SH fluctuating?

    Before start up did you check filter, coil conditions, TXV bulb location/secured/insulated?
  47. Replies
    11
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    589

    I'll second that one. I worked at a coal fired...

    I'll second that one. I worked at a coal fired power plant before. Cleaning a 5 ton condensing unit is bad enough. Can't imagine what a 50, 100+ ton chiller would take. I'm not even sure it would...
  48. Good luck to you Will. I really hope this works...

    Good luck to you Will. I really hope this works out for you, us (the contractors), and the customers as this will shape many peoples feeling on our industry. Hats off to you for looking to the future.
  49. Will Are the contractors bidding on the...

    Will

    Are the contractors bidding on the installation allowed to make a site visit? Maybe I missed that part.

    And how do you build a relationship with a contractor thousands of miles away to...
  50. Dealing with JCI for so long I find it weird that...

    Dealing with JCI for so long I find it weird that you do not already know someone. But maybe you can make a 1 page flyer or something and go to larger buildings and see if you can leave them with...
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