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  1. Replies
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    2,654

    Pressure switch tool

    I'm on the market for one as well. It would be great for testing air proving switches on reheat coils, setting pressures on high/ low static safety switches, testing pressure transducers, etc. My...
  2. Replies
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    3,959

    I definitely see what you're saying but the...

    I definitely see what you're saying but the compressor (motor) is maintaining a constant rpm whether loaded or unloaded and pumps at full capacity when loaded to nothing when unloaded. There is no...
  3. Replies
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    3,959

    Response above. Wouldn't let me post if I didn't...

    Response above. Wouldn't let me post if I didn't write something here :)
  4. Replies
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    3,959

    Any application where one compressor serves...

    Any application where one compressor serves multiple evaporators, condensers, etc would require oil return provisions (digital or conventional). This is what they mean when stating "If the system...
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    1,192

    piston size and capacity question

    That doesn't appear to be accurate either. The 6 degree SH is indicating that even though there is more refrigerant in the evaporator coil, due to metering device over feeding, there is still enough...
  6. Replies
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    1,192

    piston size and capacity question

    That's not true. The evaporator and air exchange heat. The air needs to provide as many BTUs necessary to boil the refrigerant contained in the coil. Flooding the coil means there may not be enough...
  7. As mentioned, oversized metering device. In...

    As mentioned, oversized metering device. In addition, it's impossible to have a lower than ambient liquid line temperature. Nothing indicates a restriction so you may want to verify your equipments...
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    4,981

    I'd say its good :)

    I'd say its good :)
  9. Replies
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    4,981

    That's where I disagree. 5 ohms across a switch...

    That's where I disagree. 5 ohms across a switch is an open to me. This is the reason why I never use continuity on meters, only Ω, ΚΩ, ΜΩ. The video is interesting. The beginning basically describes...
  10. Replies
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    4,981

    An open on a series circuit can be of a low...

    An open on a series circuit can be of a low enough resistance to show voltage at the load but significant enough to not "carry" current.
  11. Replies
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    4,981

    He reads 27 volts with one lead disconnected not...

    He reads 27 volts with one lead disconnected not both. None the less there's an open somewhere in the control circuit
  12. Replies
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    736

    If you want to measure positive pressure, say on...

    If you want to measure positive pressure, say on the supply duct, hook up the + to your pitot tube in the duct and allow - to be open to atmospheric pressure. For return do the opposite. To measure...
  13. Replies
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    1,945

    To answer your question, none. Understanding the...

    To answer your question, none. Understanding the operation and flow of refrigerant is important and there is a misconception it appears of what a TXV does. Although TXVs aren't utilized as a...
  14. Replies
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    Are you sure it's not a 410a system? (Both...

    Are you sure it's not a 410a system?
    (Both lines are pretty much at ambient temperature?)
  15. Replies
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    1,945

    I wonder what the logic is behind that. It's not...

    I wonder what the logic is behind that. It's not adding up in my head how it is recommended on an undercharged system to increase TXV SH setting in order to get subcooling and then magically expect...
  16. Nice real world picture you drew. I personally...

    Nice real world picture you drew. I personally don't experience that but everyone knows that's not too far fetched.
  17. Replies
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    Friend, neighbor, Craigslist partner....

    Friend, neighbor, Craigslist partner....
  18. Replies
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    833

    Are both stages operating? Is there a chance that...

    Are both stages operating? Is there a chance that your second stage is coming on before your first stage or the circuits are reversed? (Bottom of coil should always be first stage)
  19. Replies
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    7,136

    There's a difference between providing good...

    There's a difference between providing good service and being professional, from tolerating manipulative, abusive, and scam full customers. Just because they're paying doesn't entitle them to to be...
  20. Replies
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    If the customer is always right, are you...

    If the customer is always right, are you immediately just adding refrigerant to their systems? Most will tell you that's what their problem is.
  21. Thread: Water Leak

    by git-r-dun
    Replies
    11
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    716

    I was thinking along the same line. More from a...

    I was thinking along the same line. More from a loss capacity aspect though
  22. Thread: Water Leak

    by git-r-dun
    Replies
    11
    Views
    716

    I wouldn't imagine an airflow restriction based...

    I wouldn't imagine an airflow restriction based on the 12 degree split (it would be higher, even at the higher humid conditions). Cleaning the evap is a good start as mentioned above. Check your SH...
  23. Thread: Ac troubles

    by git-r-dun
    Replies
    5
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    626

    It almost appears that you weren't at a high...

    It almost appears that you weren't at a high enough range on your meter. Sensors/ thermistors are typically in the KΩ range.
  24. Thread: BTU's

    by git-r-dun
    Replies
    17
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    1,011

    The flask would require some btus as well. The...

    The flask would require some btus as well. The formula for anything is
    BTU= lbs (per hour) x Δt x Specific Heat
    So if you had 1 pound of water in a glass flask weighing 1 pound, you'd need 1 Btu...
  25. Thread: psycrometer

    by git-r-dun
    Replies
    42
    Views
    3,179

    Believe it or not the most educational stuff come...

    Believe it or not the most educational stuff come from the dissection of vague questions. I think most people gain something when everyone throws in their two cents or past experiences, even if it...
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