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  1. Replies
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    704

    What are you saying? Is your attic colder then...

    What are you saying? Is your attic colder then the wet bulb temperature of the air in your ductwork? It sounds like you need to call a service company. With all that condensation youír going to end...
  2. Thread: Green jobs

    by do over
    Replies
    17
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    1,017

    I think it best to have solar panels always...

    I think it best to have solar panels always connected to a grid tie inverter. This way you are always sending your unused power out and you meter will run backward saving you money. Donít think your...
  3. Thread: Green jobs

    by do over
    Replies
    17
    Views
    1,017

    Back a few hundred years ago the world was full...

    Back a few hundred years ago the world was full of green jobs. You donít need solar cells, wind turbines, thermal electric chips and other thing along these lines to be self-efficient. A few doors...
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    4
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    782

    I wonder what would be cheaper, a call to a...

    I wonder what would be cheaper, a call to a service company, a calling to your insurance company or someone calling the coroner for you.
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    884

    This was my question to a manufacture of such a...

    This was my question to a manufacture of such a gauge set.
    When a gauge set moisture indicator is red and a vacuum pump will not change it from red no matter how long I pull a vacuum on it. How can...
  6. Replies
    8
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    884

    If you have moisture in a system and it turns...

    If you have moisture in a system and it turns your gauge moisture indicator red. Then what, do you keep vacuuming the system for days trying to get your gauge moisture indicator to not show moisture...
  7. Replies
    8
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    884

    I donít see them that often but when I do they...

    I donít see them that often but when I do they are indicating moisture or either they have been covered up. The one I seen yesterday was redder then a stop light. I thought the best thing for it...
  8. Replies
    8
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    884

    gauge sets with a moisture indicator

    For those who have the gauge sets with a moisture indicator built into them. I would like to know if putting a piece of black duct tape over them when they indicate moisture is common practice.
  9. Replies
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    1,366

    At 39 degrees Fahrenheit thermal expansion...

    At 39 degrees Fahrenheit thermal expansion coefficient of water is actually zero. any lower it expands and any higher it expands.

    A gallon of water will not always weigh the same. Density change...
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    714

    You can use them when looking for air...

    You can use them when looking for air infiltration. As long as the color and surface is the same you can find them leaks. Iím not saying the reading youíll be getting will be accurate. A good place...
  11. Replies
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    1,366

    Ok this one has me thinking back. Water expands...

    Ok this one has me thinking back. Water expands when it cools and expands when it is heated. A gallon of water will not always weigh the same. At 39 degrees Fahrenheit thermal expansion coefficient...
  12. Replies
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    1,366

    Your homework was just done for you so I will...

    Your homework was just done for you so I will add. The answer is correct only if at a constant pressure of one atmosphere (14.656 PSIA) Remember PSIA is the pressure relative to a vacuum and PSIG is...
  13. Iím glad I live in a house that is totally...

    Iím glad I live in a house that is totally electric. On day the EPA might make everyone with a gas furnace, water heater or stove, turn off the gas to there home because itís flammable and carbon...
  14. Replies
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    13,827

    I guess that was too vague. The idea to charging...

    I guess that was too vague. The idea to charging is to have the desired cooling affect the evaporator needs to have the right amount of refrigerant in it, be it liquid or liquid flashing to gas.
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    Why didnít anyone say to charge R410 with liquid...

    Why didnít anyone say to charge R410 with liquid only? The real question is why was it not known to use Superheat for fixed restrictor systems and Subcooling for TXV systems. Is it know the basic...
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    I donít want to say to much. That way I will not...

    I donít want to say to much. That way I will not get beaten up that much. The BTUH load for each room should calculate duct size.
  17. Replies
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    12,820

    I had a doghouse built about 20 years ago it had...

    I had a doghouse built about 20 years ago it had self regulating heat trace that you use to keep pipes from freezing in the floor. I had an underground GFI protected service for it. The doghouse was...
  18. To say it this way. If discharge valves in the...

    To say it this way. If discharge valves in the compressor failed then the compressor wouldnít be compressing the gas so you would have a higher then normal low side and a lower then normal high side....
  19. OOPS "A above normal low side pressure with a...

    OOPS "A above normal low side pressure with a below normal high side pressure with a low amp draw at compressor" we were checking then discharge valves in the compressor. Normal pressure is not on...
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    608 technician certification is not required in...

    608 technician certification is not required in order to purchase HFC refrigerant substitutes that do not contain an ozone-depleting substance but It remains illegal to knowingly vent HFC substitutes...
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    R410 is not required

    I just read this on one of the posts ďJust stay away from CFC and HCFC's and you won't need to get the testĒ Someone was asking a question on testing to get certified and that was one of the answers...
  22. Thread: Manual J and D

    by do over
    Replies
    10
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    1,203

    They are assuming the first installer sized the...

    They are assuming the first installer sized the unit right. They should of asked if the house had any improvements.
  23. Turn the unit on in cool mode and get the...

    Turn the unit on in cool mode and get the following reading. A below normal low side pressure with a above normal high side pressure with a low amp draw at compressor with a low temperature...
  24. Replies
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    2,516

    Argon cost more. 80CF of Argon is $40

    Argon cost more. 80CF of Argon is $40
  25. Replies
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    2,516

    I learned the trade at Columbus technical collage...

    I learned the trade at Columbus technical collage back in 74-76. That was a long time ago, I remember the instructor telling us then that there was a new gas out called MAPP, he told us never to use...
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