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Type: Posts; User: HVAC Teacher

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  1. Replies
    17
    Views
    433

    Some 3 phase motors will run backwards at half...

    Some 3 phase motors will run backwards at half speed when you lose 1 leg of power.

    Had a building with a phase reversal over a weekend. Darn electricians swapped the legs, (don't know why)...
  2. Thread: Copperpus

    by HVAC Teacher
    Replies
    12
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    1,134

    Apparently, you guys know nothing about oil...

    Apparently, you guys know nothing about oil traps!:whistle:
  3. Replies
    51
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    2,492

    Came across a a unit with a TXV that was failed...

    Came across a a unit with a TXV that was failed wide open. "Others" had this unit so over charged , I took about 5 lbs of R22 out of it just to keep it from tripping on high head! Previous work...
  4. Replies
    37
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    2,387

    Love these questions! What does “outdoor unit”...

    Love these questions!

    What does “outdoor unit” refer to? / Huh?
    Is 208v single phase really single phase? / Huh?
    What is an “HOA switch” for? / Legend please!
    If there is voltage potential at...
  5. Replies
    51
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    11,529

    I teach wiring methods,controls,diagram reading,...

    I teach wiring methods,controls,diagram reading, & meter usage at a "tech school".
    A lot of "spoon feeding"! "FIGURE IT OUT!" hurts their feelings!
  6. Self cleaning heat strips!

    Self cleaning heat strips!
  7. I had intermittent pressure switch faults on my...

    I had intermittent pressure switch faults on my new Rheem (emergency install / long story). Used existing PVC from the old carrier.
    Long story short: 1 too many elbows! Next time I'll read the...
  8. Are you using a true RMS meter? I'm thinking...

    Are you using a true RMS meter? I'm thinking Harmonics from something else in the building. (just a guess). Are any of the terminals discolored?

    Had this happen with only 1 of 6 Rtus on a building...
  9. Replies
    31
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    1,444

    Love it when they tell you they can't afford it...

    Love it when they tell you they can't afford it (replacement) , "can you just get it going?"
    All along you are noticing the 60" flat screen & the Escalade in the driveway!
  10. Pure poetry! & Nice cleanup job!

    Pure poetry! & Nice cleanup job!
  11. Replies
    15
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    668

    "(even tho i paid a thousand bucks to be taught...

    "(even tho i paid a thousand bucks to be taught how it works)...yet somehow we are supposed to magically come up with a perfect ladder diagram for it."

    Your instructor is trying to get you to...
  12. Replies
    7
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    1,414

    I told you guys not to pull that deep of a vacuum!

    I told you guys not to pull that deep of a vacuum!
  13. Replies
    16
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    2,497

    That there is some serious geometry!

    That there is some serious geometry!
  14. Replies
    2
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    370

    Obstructed vent on regulator?

    Obstructed vent on regulator?
  15. Replies
    8
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    1,719

    Code says: On or within line of sight! Why didn't...

    Code says: On or within line of sight! Why didn't they just screw it to the condenser coil?
  16. Replies
    38
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    1,858

    Here I've been teaching heat load calcs for no...

    Here I've been teaching heat load calcs for no reason!

    Using the rule of thumb and charts: I am undersized by 1.5 tons and 70,000 btu's.

    Just don't tell my system!:gah:
  17. Replies
    4
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    740

    There should not be any significant water unless...

    There should not be any significant water unless there is something wrong.
    Drain line , humidifier.....
  18. Replies
    34
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    2,369

    Poll: I've seen 30 years of ugly jobs but that one is...

    I've seen 30 years of ugly jobs but that one is near the top!
  19. Replies
    26
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    7,222

    Using the chimney as a "pipe chase" sounds...

    Using the chimney as a "pipe chase" sounds feasable. Assuming that it is truly abandoned. It would really clean up this really ugly install.
  20. Replies
    73
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    6,276

    tomato based products?

    tomato based products?
  21. Replies
    5
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    527

    The new ones come with a wattmaster control that...

    The new ones come with a wattmaster control that does it all.
  22. "I love the smell of smoking a high end piece of...

    "I love the smell of smoking a high end piece of equipment in morning,
    Smells like victory!"
    Apocalypse Now
  23. Replies
    7
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    2,575

    The modular idea is sound for certain...

    The modular idea is sound for certain applications.

    Don't expect the longevity you had with that absorber.
  24. 1. I enjoy luxuries like eating, paying taxes...

    1. I enjoy luxuries like eating, paying taxes and, monthly bills.
    (I also have a passion for being pulled out of bed in the middle of the night, working holidays & weekends, and going into...
  25. Replies
    4
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    418

    Auto-ranging: It will pick it for you Scalable:...

    Auto-ranging: It will pick it for you
    Scalable: Next highest value to what you are measuring
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