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  1. Thread: 407c ??

    by hands
    Replies
    5
    Views
    370

    I have a customer that had several process...

    I have a customer that had several process chillers with remote condensers and used 407c refrigerant. The customer had me doing a monthly PM on them and I found several leaks in the circuits. The...
  2. Thread: Bad Gas Valve?

    by hands
    Replies
    8
    Views
    619

    Are you talking about the adjustment cap on the...

    Are you talking about the adjustment cap on the gas regular or the gas valve? If it's the gas valve, I have seen several times where the manifold gas pressure will change when the cap is put back on.
  3. Replies
    18
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    706

    Every boiler system I have worked on has used a...

    Every boiler system I have worked on has used a water softener for the makeup water. The TDS will still get high, so the continues surface blow down and daily bottom blow downs will still need to be...
  4. Replies
    14
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    1,197

    I did notice that the gas regulator had a brass...

    I did notice that the gas regulator had a brass vent limiter. I plan on replacing it with one of the blue vent protectors. But I'm going to wait until it gets cold again to see if that is actually...
  5. Replies
    19
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    928

    You add a low ambient program on Tracer Summit to...

    You add a low ambient program on Tracer Summit to lock out mechanical cooling. I also think you can lower the supply air set point on Tracer.
  6. Thread: McQuay WSHP

    by hands
    Replies
    7
    Views
    543

    So are you saying that the compressor never...

    So are you saying that the compressor never starts on its own? Are the HP switch wires terminated correctly?
  7. Replies
    14
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    1,197

    So far this week there has been no more problems....

    So far this week there has been no more problems. It has been in the low 40* to low 50*. I don't even know if it has been calling for heat. Maybe next week will bring so cold days.
  8. Replies
    14
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    1,197

    Thanks for the replies guys. I asked the customer...

    Thanks for the replies guys. I asked the customer to call me next time and reset it. I'm sure there is actually a problem because the space is cold when he has this fault. I was thinking it might be...
  9. Replies
    14
    Views
    1,197

    Trane Flame Sensor

    I have had two calls on a Trane RTU, M #YSC120. The customer said it was not heating and had a fault, "Flame not sensed with a call for heat". Both times he reset it through Tracer. When I arrived,...
  10. Replies
    0
    Views
    292

    Trane IGN1 COMM Fault

    I had a call that a Trane RTU, M# YHC092F4RHA0------ had a IGN1 COMM TIME OUT fault. The RTRM board was also indicating a heating fault, but the Ignition board did not show any faults. This unit has...
  11. Using a straight edge or laser does make good...

    Using a straight edge or laser does make good sense to me and they do work, even if the sheaves are not the same width, as long as you know what you are doing. But a straight edge is less expensive....
  12. I use a straight edge. If one sheave is wider,...

    I use a straight edge. If one sheave is wider, you measure them and split the difference. The straight edge will then hang over the narrower sheave this amount. I have been using this method for many...
  13. Replies
    16
    Views
    934

    I had to replace one on a unit that was only...

    I had to replace one on a unit that was only about six months old. The motor comes with the wheel on it. It is very expensive and takes two people to change.
  14. Replies
    14
    Views
    1,302

    I work on a lot of Trane RTU's and the burners...

    I work on a lot of Trane RTU's and the burners can light off very rough if the gas pressure is too high or too low. I would guess that it was set to a positive pressure. That being said, I was...
  15. Replies
    16
    Views
    2,467

    My experience is removing the plug doesn't do...

    My experience is removing the plug doesn't do much. Years ago I had an account that I went to every day. The customer had a PM procedure that called for removing the relief plug and grease the motor...
  16. Replies
    7
    Views
    558

    I think they make a special bit for tile.

    I think they make a special bit for tile.
  17. Replies
    11
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    836

    It won't hurt to mix cores, but I would stick...

    It won't hurt to mix cores, but I would stick with the HH cores. A liquid line sight glass with moisture indicator would also be a good idea.
  18. Replies
    11
    Views
    836

    What type of oil is in the system? If it is POE,...

    What type of oil is in the system? If it is POE, you should also change the compressor oil. If mineral, I would be more concerned about the acid because you will be able to boil out the moisture...
  19. Replies
    44
    Views
    3,043

    Try recovering the charge, evacuate and charge...

    Try recovering the charge, evacuate and charge with new R-22 refrigerant.
  20. Replies
    14
    Views
    1,391

    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...
  21. Replies
    14
    Views
    1,391

    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...
  22. 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.
  23. Replies
    27
    Views
    2,834

    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.
  24. Thread: Repair Question

    by hands
    Replies
    8
    Views
    683

    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...
  25. Thread: Repair Question

    by hands
    Replies
    8
    Views
    683

    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...
  26. Replies
    20
    Views
    2,332

    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?
  27. Replies
    23
    Views
    1,420

    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...
  28. Replies
    10
    Views
    893

    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...
  29. Replies
    7
    Views
    715

    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".
  30. Replies
    8
    Views
    827

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

    With the fan in auto, does the cooling also short cycle with the blower?
  31. Replies
    6
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    773

    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.
  32. Replies
    15
    Views
    942

    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.
  33. Replies
    5
    Views
    557

    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.
  34. Thread: High pressure

    by hands
    Replies
    29
    Views
    2,195

    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?
  35. Replies
    16
    Views
    1,362

    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...
  36. Replies
    10
    Views
    997

    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.
  37. Replies
    90
    Views
    9,312

    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...
  38. Replies
    11
    Views
    1,581

    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...
  39. 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...
  40. Replies
    14
    Views
    1,554

    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.
  41. Replies
    21
    Views
    1,785

    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.
  42. Replies
    37
    Views
    3,177

    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...
  43. Replies
    10
    Views
    1,085

    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...
  44. Replies
    10
    Views
    1,085

    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 ...
  45. Replies
    10
    Views
    1,085

    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...
  46. Replies
    13
    Views
    1,559

    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.
  47. Replies
    20
    Views
    2,893

    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.
  48. Thread: Green POE Oil

    by hands
    Replies
    7
    Views
    1,332

    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.
  49. Thread: Travel Pay

    by hands
    Replies
    19
    Views
    2,328

    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...
  50. 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.
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