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Type: Posts; User: bobster

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  1. Replies
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    514

    Start with the wiring diagram & schematic. ...

    Start with the wiring diagram & schematic. Determine what you want to measure. Know ahead of the measurement what "good" and "bad" readings are. Think about the sequence of operation.

    Why...
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    5,220

    X2. Leaving the sensing bulb like that is...

    X2. Leaving the sensing bulb like that is inexcusable. And no LL filter/drier? Really?
  3. I believe the common for the capacitor connects...

    I believe the common for the capacitor connects to one leg of the 240 V contactor output (say, L1), which is where the motor *run* winding also connects.

    The "common" terminal on the motor...
  4. If you understand how one motor works, you...

    If you understand how one motor works, you understand how two motors work.

    Draw two separate circuits, one for the compressor motor, and one for the condenser fan motor.

    Notice how they're...
  5. Because in actuality it is one leg of the 240...

    Because in actuality it is one leg of the 240 volt circuit.
  6. Replies
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    675

    If you really understood what SH & SC are, I...

    If you really understood what SH & SC are, I don't think you'd be asking the question this way. What do the charts say?
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    If you've got the textbook, then you've probably...

    If you've got the textbook, then you've probably got all the information your teacher's gonna give you in class next year. Read ahead. Think about what you're seeing, and about what the purpose of...
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    795

    Had one like this a month ago. When I pulled the...

    Had one like this a month ago. When I pulled the coil to look at supply plenum, found about 3" of hot water in it. Turned out there was a leak in the hot water supply line (HWT is right next to...
  9. Replies
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    3,756

    One of the best books I can recommend is an older...

    One of the best books I can recommend is an older copy of "Trane Air Conditioning Manual". I'm talking like the 1950s versions. They're written much, much better than more modern stuff, and cover...
  10. Trane/AS 950 Comfort Control - "Raptor algorithms" ???

    I'm reading the Technical Service Manual for the 950 Control trying to learn more about how it does its thing. In it, there is a reference to the use of "Raptor algorithms".

    What are Raptor...
  11. Replies
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    1,040

    High suction could be caused by high heat load on...

    High suction could be caused by high heat load on the evap. What is the air temperature entering the coil?
  12. Replies
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    582

    Ditto. No DIY here.

    Ditto. No DIY here.
  13. Replies
    49
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    5,816

    Does China even have a minimum wage?

    Does China even have a minimum wage?
  14. Replies
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    1,798

    I'll try it next time. Always looking for a...

    I'll try it next time. Always looking for a better way.
  15. Replies
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    5,816

    I went on one a couple of weeks ago where the...

    I went on one a couple of weeks ago where the lady had called one of these companies (their TV pitchman is a former local college football QB) and they told her she needed to replace her system. ...
  16. Replies
    38
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    1,798

    I never thought about cleaning a blower wheel...

    I never thought about cleaning a blower wheel without taking the blower housing out & taking the motor off. I use a toothbrush & shop vac. It's a nasty job.
  17. Not to be picky, but the 12 degrees of superheat...

    Not to be picky, but the 12 degrees of superheat is not picked up during evaporation - latent heat is picked up during evaporation.

    Then after complete evaporation, more heat (superheat) is...
  18. Replies
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    1,042

    The bulletin, disappointingly, had nothing to say...

    The bulletin, disappointingly, had nothing to say about *why* mismatches cause premature compressor failure. I don't question that it's true, necessarily, its just something I'm trying to understand.
  19. Replies
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    1,146

    Voltage doesn't "go in" or "come out", as I know...

    Voltage doesn't "go in" or "come out", as I know you know. It's measured between two points in the circuit.
  20. Replies
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    1,042

    Can you post a better copy of the bulletin? I'd...

    Can you post a better copy of the bulletin? I'd like to read it.
  21. Replies
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    1,146

    X2. The wiring / schematic diagram is your best...

    X2. The wiring / schematic diagram is your best friend. Use it.

    The sum of the voltage drops around the load side of the circuit will equal the supply voltage. Use your meter to find the one...
  22. Replies
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    X2

    X2
  23. Replies
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    Sent it back to Testo & they fixed it.

    Sent it back to Testo & they fixed it.
  24. I really need to learn how to weld...

    I really need to learn how to weld...
  25. Where did you buy the angle iron stand (or did...

    Where did you buy the angle iron stand (or did you make it)?
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