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  1. Replies
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    596

    I don't see why it would hurt a scroll compressor...

    I don't see why it would hurt a scroll compressor either and have done it in the past. I have even run them into a slight vacuum. I can't remember where I read that this shouldn't be done, it might...
  2. Replies
    14
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    596

    Pumping down circuit

    I would like to get some opinions on this. Is it okay to pump down a circuit that has a scroll compressor. I'm just talking about doing this for repairs or changing liquid line filter cores. It seem...
  3. If the coil is truly clean, it might be the...

    If the coil is truly clean, it might be the position of the fan blade. If it's too high or too low, it will no move air properly.
  4. Replies
    21
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    1,141

    I have had unglued traps freeze and crack....

    I have had unglued traps freeze and crack. Replacing traps is just something that needs to be done from time to time.
  5. Thread: Repair Question

    by hands
    Replies
    8
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    519

    Well I told the customer I wanted to shut down...

    Well I told the customer I wanted to shut down the unit for safety purposes. The shop sent two other guys out to help with the job. After the refrigerant and oil was removed, I got pulled out on...
  6. Thread: Repair Question

    by hands
    Replies
    8
    Views
    519

    Repair Question

    I was just wondering what you guys think about this. I'm replacing a compressor that is on a tandem set. This is a Trane Intellipak 60 ton unit. It has two refrigerant circuits and I'm working on...
  7. Replies
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    1,934

    Are you sure it doesn't take 2.2 lbs. of R-22?

    Are you sure it doesn't take 2.2 lbs. of R-22?
  8. Replies
    23
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    1,020

    You said that there was a leak and you fixed it....

    You said that there was a leak and you fixed it. Did you recover the entire charge and fill the system with new liquid 407-C refrigerant? If you have a leak with this refrigerant, you will have to...
  9. Replies
    10
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    643

    The best place to put your temperature clamps...

    The best place to put your temperature clamps would be within 6" from the outlet of the evaporator coil for SH and within 6" from the outlet of the condenser coil for SC. That being said, I usually...
  10. Replies
    7
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    538

    That's the new triple P compressor from Trane. It...

    That's the new triple P compressor from Trane. It uses urine instead of oil for lubrication. They smell bad but are really "Green".
  11. Replies
    8
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    557

    With the fan in auto, does the cooling also short...

    With the fan in auto, does the cooling also short cycle with the blower?
  12. Replies
    6
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    513

    What voltage is running through the fan cycling...

    What voltage is running through the fan cycling control? If you are running line voltage through it, this could be the problem. If it's control voltage, then it's not the problem.
  13. Replies
    15
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    663

    With HGBP you are better off to weigh in the...

    With HGBP you are better off to weigh in the R-22. Just call the manufacturer, give them the model & serial numbers and they will be able to tell you the refrigerant charge.
  14. Replies
    5
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    385

    220 lbs of refrigerant for a 5 ton unit sounds...

    220 lbs of refrigerant for a 5 ton unit sounds about right. As long as the line set is 1mile long.
  15. Thread: High pressure

    by hands
    Replies
    29
    Views
    1,637

    Sounds like it has a restriction, did you replace...

    Sounds like it has a restriction, did you replace the filter-driers? Does it have a TXV or is it fixed orfices?
  16. Replies
    16
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    978

    I have seen pillow block bearings that were not...

    I have seen pillow block bearings that were not greased from the factory. You should be able to see if they had grease in them after running for seven months. Have the belts been changed, if so, were...
  17. Replies
    10
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    739

    I know that Trane use to sell screen kits to keep...

    I know that Trane use to sell screen kits to keep the coils clean. They were advertised that when the fans shut down, all of the cottonwood and debris would fall off of the screens.
  18. Replies
    90
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    7,160

    If you want to get technical, then you shouldn't...

    If you want to get technical, then you shouldn't even be around an open control panel. If a contractor pulls in and there is a problem with the motor, it could explode just as if you push it in by...
  19. Replies
    11
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    1,261

    This unit has the fixed orifices in the liquid...

    This unit has the fixed orifices in the liquid line feeder tubes going into the evaporator coil. You will see this in many RTU's. Trane is known to get restrictions in the orifices, usually a waxy...
  20. You need to have a good load so both compressors...

    You need to have a good load so both compressors are running and disable the HGBP. If there is a liquid receiver, the only way to charge it, without knowing the factory charge, is to go by the sight...
  21. Replies
    14
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    1,178

    I have seen this on several Trane units. I have...

    I have seen this on several Trane units. I have always brazed over the hole and spread it around the pipe. I have never had a problem with doing this.
  22. Replies
    21
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    1,180

    The electric heaters should have pressure...

    The electric heaters should have pressure switches to prevent them from energizing if there isn't enough air flow.
  23. Replies
    37
    Views
    2,181

    How does it run with just one of the tandem...

    How does it run with just one of the tandem compressors? What is the sub cooling? Sounds like it could be low on charge, sometimes the manufacturer lists the wrong refrigerant weight. Has this unit...
  24. Replies
    10
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    700

    It's a shame this happened, the unit is only...

    It's a shame this happened, the unit is only about 14 months old. In the Fall, roofers were working and hit the coil with something. They actually reported something spraying out of the unit. I was...
  25. Replies
    10
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    700

    I have considered a take-apart shell, but there...

    I have considered a take-apart shell, but there really isn't a good place to support it where the cores could be replaced. I'm also concerned about the cover leaking with the high pressures of ...
  26. Replies
    10
    Views
    700

    Liquid Line Flare Filters

    I was just wondering how liquid line filter-driers with flare connections hold up with R-410a systems. Do any of you guys use them and if so, do they tend to leak? I will be replacing the condenser...
  27. Replies
    13
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    1,170

    I work on a few Advantage process chillers. In...

    I work on a few Advantage process chillers. In the last five years that I have been doing the maintenance on them, there has never been a problem or repair needed.
  28. Replies
    20
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    2,526

    A few years ago I found a leak like that on a hot...

    A few years ago I found a leak like that on a hot gas solenoid valve stem. This was on a Koolant Koolers chiller and the solenoid valve cycled a lot. I think the plunger wore out the top of the stem.
  29. Thread: Green POE Oil

    by hands
    Replies
    7
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    1,029

    I have worked on several Koolant Koolers chillers...

    I have worked on several Koolant Koolers chillers that had Copeland scroll compressors with fluorescent yellow refrigerant oil.
  30. Thread: Travel Pay

    by hands
    Replies
    19
    Views
    1,603

    If I was sent to a job 2 hours away and worked...

    If I was sent to a job 2 hours away and worked there until quitting time, I would be paid straight time for the ride home. If I ran an after hour service call that was 2 hours away, I would be paid...
  31. I don't know if it's code, but I have seen them...

    I don't know if it's code, but I have seen them in many mechanics garages. I have even seen them and wood shops and they were full of wood dust.
  32. If the unit is on the roof, you will need to use...

    If the unit is on the roof, you will need to use a lift or a crane. One guy won't be able to lift it up safely. They are easy to change, but if it was me, I would quote 8 hours for the job. I like to...
  33. Replies
    17
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    1,247

    X2

    X2
  34. Thread: Liebert Issue

    by hands
    Replies
    8
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    1,176

    Does it have a P266 Fan Speed Control. If it...

    Does it have a P266 Fan Speed Control. If it does, you may need to set up the parameters for 407c. I have also seen the boards go bad in them and the fan will run full speed all of the time or not at...
  35. Thread: Holiday Pay

    by hands
    Replies
    65
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    5,542

    Going by the union contract, we don't get paid...

    Going by the union contract, we don't get paid holidays. But if you work on a holiday, you get double time. Now the contractor I work for does pay me for holidays, but this is something I have worked...
  36. Thread: Trane Voyager

    by hands
    Replies
    28
    Views
    2,310

    It sounds like an air flow problem or the supply...

    It sounds like an air flow problem or the supply air is being pulled into the return giving you a high return air temperature. I have see this where the supply and return diffusers were high in the...
  37. Thread: Trane Voyager

    by hands
    Replies
    28
    Views
    2,310

    What was the return air temperature? Have you...

    What was the return air temperature? Have you checked the manifold gas pressure to see if the burner is over firing? What is the induction blower?
  38. Thread: Question??

    by hands
    Replies
    24
    Views
    2,543

    There's an old saying, A/C work is just sloppy...

    There's an old saying, A/C work is just sloppy refrigeration work.
  39. Replies
    3
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    1,041

    One is just as bad as the other.

    One is just as bad as the other.
  40. If you posted the gas pressures correctly, the...

    If you posted the gas pressures correctly, the unit is over fired. You should have -.2" WC.
  41. Thread: wshp

    by hands
    Replies
    16
    Views
    1,086

    Whatisthesuperheatandsubcooling?

    Whatisthesuperheatandsubcooling?
  42. You said the INDUCER motor was replaced. It's...

    You said the INDUCER motor was replaced. It's actually called a Combustion Blower, this unit doesn't have induced draft. As far as I know, Trane doesn't sell just the motor, so whoever replaced it...
  43. I would say that a 70* temperature rise and a...

    I would say that a 70* temperature rise and a 180* Hi-Limit would be normal. You need to be careful about replacing a Hi-Limit without knowing what it should be. If the unit has been overheating and...
  44. Replies
    7
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    766

    What I have read about the Testo 510, it doesn't...

    What I have read about the Testo 510, it doesn't read negative pressure. Is this incorrect?
  45. Replies
    7
    Views
    766

    Digital Manometer

    I would like to get a digital manometer that will also read negative pressures since I work on a lot of Trane RTU's. Several guys have told me that the digital manometers are not very accurate. I...
  46. Replies
    46
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    3,799

    That's funny, I think "hack" when there isn't...

    That's funny, I think "hack" when there isn't electrical tape on a wire nut and the nut has worked loose and the wire has shorted.
  47. Replies
    22
    Views
    2,793

    The manifold gas pressure should always be...

    The manifold gas pressure should always be checked after doing a repair on a burner or heat exchanger. For that matter, it should be checked yearly while doing the Fall maintenance.
  48. Replies
    14
    Views
    1,192

    So you think that with winter temperatures of -26...

    So you think that with winter temperatures of -26 F that old people will have their windows open all the time? Is this something you would do in your house?
  49. Replies
    14
    Views
    1,192

    I wouldn't think that windows could be used for...

    I wouldn't think that windows could be used for minimum outside air requirements in the rooms.
  50. Replies
    8
    Views
    853

    So did you actually see flame with the combustion...

    So did you actually see flame with the combustion blower off? When the combustion blower did run and the burner fired, what was the gas pressure?
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