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  1. Replies
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    760

    I have seen a lot of problems with Trane units...

    I have seen a lot of problems with Trane units over the last several years. I have a customer that has mostly Trane units. In the last four years, there have had nine RTU's installed. Eight of them...
  2. Replies
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    239

    If the subcooling looks good and you don't have...

    If the subcooling looks good and you don't have an airflow problem, you will have to adjust the TXV. But I would make sure the evaporator is clean. I just went through similar problem with a RTU,...
  3. Thread: BDP RTU problem

    by hands
    Replies
    5
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    379

    Well, I got back to the unit today and found that...

    Well, I got back to the unit today and found that the evaporator coil was dirty, especially on the lower half which is circuit #1. So I would say it did have ice on it the other day when I was having...
  4. Thread: BDP RTU problem

    by hands
    Replies
    5
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    379

    I haven't been able to check the unit any...

    I haven't been able to check the unit any further. It is possible that circuit #1 had ice on it, but circuit #2 ran fine. I didn't check it out very good due to the rain. I hope to get back to it...
  5. Thread: BDP RTU problem

    by hands
    Replies
    5
    Views
    379

    BDP RTU problem

    I was doing the PM on BDP RTU, M# 580DEV120180AAAA. I found that ckt#1 was tripping on low pressure and the suction line was frosted from the evaporator to the compressor. I added 1 lb. of R-22 which...
  6. You should check it at the outlet of each...

    You should check it at the outlet of each evaporator coil as you would with any system. I would setup each circuit by itself, then run both circuits together and check them again.
  7. Replies
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    227

    filter-drier pressure drop.

    I was just wondering what kind of pressure drop across a filter-drier core you guys change the core. It seems that I remember reading that when it gets to 3 psi above the starting pressure drop, you...
  8. Thread: leak testing ?

    by hands
    Replies
    12
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    510

    I think it's just the temperature difference. If...

    I think it's just the temperature difference. If you have the time, you could watch the pressure to see if it goes back up to 170 psi as the ambient temperature goes up. Put I would start evacuating,...
  9. Replies
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    499

    I have repaired several leaks on the factory 90...

    I have repaired several leaks on the factory 90 right off the compressor. This is very common on Trane equipment. I have always just brazed over the leak, but put a heavy coating of sil-foss over...
  10. Replies
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    649

    Staybrite #8 will not stick to braze, I have...

    Staybrite #8 will not stick to braze, I have tried it. But you can braze over staybrite, and yes I have done it.
  11. Replies
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    1,699

    Why don't you just braze in your fitting and then...

    Why don't you just braze in your fitting and then braze around the soft solder fittings that you are worried about. You can braze right over solder with no problem. You could also just cut out some...
  12. Thread: Laptops

    by hands
    Replies
    7
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    531

    My company gave all Service Techs net books to...

    My company gave all Service Techs net books to use. We do electric service reports with them.
  13. Thread: Work Pants

    by hands
    Replies
    32
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    2,116

    I like Dickies Carpenter jeans. They are made...

    I like Dickies Carpenter jeans. They are made well and hold up good.
  14. I would think every service tech could sweat...

    I would think every service tech could sweat loose a solder joint and re-solder it. If they couldn't, they would have a problem changing a compressor. As for the solders he mentioned, Stay-Brite #8...
  15. I would just sweat it loose, clean the joint...

    I would just sweat it loose, clean the joint good, flux it and solder it with 45% silver solder.
  16. Replies
    5
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    282

    I get them from Air Filters Direct in Cincinnati.

    I get them from Air Filters Direct in Cincinnati.
  17. Replies
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    1,711

    Why don't you just send a tech that knows what...

    Why don't you just send a tech that knows what he's doing, recover the charge, replace the liquid line filter drier, evacuate the circuit and charge it. This would be the right thing to do and would...
  18. Thread: r22 at 300 psig?

    by hands
    Replies
    30
    Views
    1,703

    With a space temperature that low, the suction...

    With a space temperature that low, the suction pressure will be low and the evaporator coil will freeze up. They might be trying to keep the head pressures up which will also make the suction...
  19. Replies
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    787

    Sounds like one fan is moving all of the air and...

    Sounds like one fan is moving all of the air and the other fan is freewheeling. Try starting out with both fans at say 20 Hz and increase them at the same time and see if the amps stay closer. Have...
  20. Replies
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    332

    I attended a class on compressor rebuilds. The...

    I attended a class on compressor rebuilds. The guy giving the class said that a full remanufactured compressor, even from Carlyle, still uses mostly used parts. He said that they only replace the bad...
  21. Thread: Leak on HP

    by hands
    Replies
    16
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    736

    I would consider 5 psi every 3 hours a large...

    I would consider 5 psi every 3 hours a large leak, it should be easy to find one that size. That being said, I have also had trouble finding large leaks. You might have to remove the insulation from...
  22. Replies
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    680

    What was the actual DSH?

    What was the actual DSH?
  23. I think that a lot of motors that are coming out...

    I think that a lot of motors that are coming out nowadays can't handle speed controls. I replaced a condenser fan motor about a year ago with a OEM from Trane. This unit had a ICM Fan Speed Control...
  24. Replies
    4
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    338

    Well I returned to the job today and the circuit...

    Well I returned to the job today and the circuit held pressure over the weekend. I purchased a 1/2" vacuum hose and another Appion core removal tool. I evacuated for over an hour and got it down to...
  25. Replies
    4
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    338

    I know it could be the hoses, micron gauge or...

    I know it could be the hoses, micron gauge or vacuum pump. I was using 1/4" refrigeration hoses, my company doesn't want to buy vacuum hoses.
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