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Type: Posts; User: kroberts38

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  1. Replies
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    801

    Tech

    I would replace the line set. If there is a trap that was bent in them when they were installed that oil will stay no matter what they flush it out with. Odds are the are not the right size anyway. A...
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    1,463

    HVAC Student

    The TXV is the metering device. It regulates the superheat. The distribution orfice allows the refrigerant gas to be evenly shared through the evap coil.
  3. HVAC Student

    I do not think that the placement of the supply and returns on the same wall would make that much of a difference. Try this take a match light it and hold it 12" away and try to suck it out then blow...
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    1,277

    HVAC Student

    Keep in mind that all new equipment is 13 seer or better so you will have to replace both units.
  5. HVAC Student

    I do believe that American Standard owns trane so which ever is cheaper.
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    1,575

    HVAC Student

    Good for you Cottygee! Building inspectors are for your protection against contractors that do not follow the codes. I have never heard that from a licensed contractor.
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    1,508

    HVAC Student

    I really think that it depends on where your vents are, if they are in the floor odds are something has probably fell into it, and if you put a new system in the airflow will more than likely...
  8. Thread: Geothermal

    by kroberts38
    Replies
    5
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    680

    HVAC Student

    What you are missing is the regfrigeration loop. The return air is being reheated for your home from the indoor coil. Your 55 deg glycol temp is giving heat to the refrigerant in your outdoor coil....
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    1,605

    HVAC Student

    I would have to say yes, duct design is very important when it comes to how the air move throughout your home with poor duct sizes you would not get the effecency out of your equipment regardless of...
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    528

    HVAC Student

    Have you read the air quality forum on Ozone yet? I would check that out before installing a UV light.
  11. Replies
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    1,516

    HVAC Student

    You should get a Manual J done. There are a lot of questions like what floor are you on how many exposed walls do you have, windows . You can use the rule of thumb to get you in the ball park. That...
  12. Replies
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    1,516

    HVAC Student

    SEER rating is how efficent your equipment is the better the equipment the less power it consumes. Having a high SEER rated piece of equipment does not mean it is oversized. The size of the unit is...
  13. Replies
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    4,974

    HVAC Student

    So the membership commitee will determine if I am eligiable. Thanks for the information.
  14. Replies
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    2,385

    HVAC Student

    Environment is the key factor in how long a unit lasts. If it is under a deck and not subject to the elements it could last longer. Hear in Virginia Beach (salt in the air) some units are lucky to...
  15. Replies
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    4,974

    HVAC Student

    I know about the other forums. I was talking about credentials what would I need to have or know. I am HVAC certified have my EPA universal card but I have only been working in the field for a few...
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    2,385

    HVAC Student

    I do not think there is a shelf life on a sealed container of R-22. However you do need an EPA certificate to purchase any refrigerants except 134a. I would not worry about your system 15 years from...
  17. Replies
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    4,974

    HVAC Student

    What classifies a member as a professional member? I just thought I would ask maybe I do. As far as the take off from the end cap in my manual d class they explained how air flows and that you would...
  18. Replies
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    4,857

    HVAC Student

    I only related that (ASE to NATE) because that is what a few of my instructors did at my college. I believe that is what NATE is trying to do to the HVAC industry but just like the ASE program people...
  19. Replies
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    4,857

    HVAC Student

    Thanks for the input I guess I won't waste my time with NATE test. They were pushing it at the college I went to. I have only been working in this field for a few months. I am still in the NAVY as an...
  20. Replies
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    4,857

    HVAC Student

    Nobody said you had to be NATE certified to be able to do the work. Some people are for it and others are not, but most people are for training there techs and if NATE is not that good RSES has a...
  21. Replies
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    4,857

    HVAC Student

    O.K. if it is that simple then why isn't everyone qualified?
  22. Replies
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    3,650

    HVAC Student

    I am still learning as my days go on. They teach this stuff at most comunity colleges. I went to class for Manual J and Manual D and if I did not I would be lost too.
  23. Replies
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    4,857

    HVAC Student

    So what you are saying is that ASE is better than NATE? I too am ASE Certified but not NATE I only have heard about some of the questions that they ask so I guess I will have to become NATE certified...
  24. Replies
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    4,857

    HVAC Student

    Nate is not the only certification out there, but what it is doing is trying to ensure that the HVAC industry has a standard. Quality is what we are after and if a business is trying to train itself...
  25. Replies
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    4,857

    HVAC Student

    As I said base line knowledge. I did not say it gave him common sense that is a personal judgement. Just because you finished training doesn't mean you know it all.
  26. Replies
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    4,857

    HVAC Student

    The NATE certification is like ASE certification for a car mech. Would you take your car to someone who has not been tested for a base line knowledge???
  27. Replies
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    3,650

    HVAC Student

    I also have a manual D in front of me and if you go to Apendix 2 Chart 7 pg A2-10 it has friction loss chart for flex duct. I do not think the manufacturer matters but the friction loss is per 100...
  28. Thread: Humidifier?

    by kroberts38
    Replies
    12
    Views
    866

    HVAC Student

    Humidifiers add moister to the air which is latent heat. When you turn on any furnace you are adding only sensible heat you would have to look at a psychrometric chart to see this in black and white...
  29. Thread: Too all

    by kroberts38
    Replies
    62
    Views
    4,656

    HVAC Student

    What does super heat temps due for you if it is a 7.5 ton system it most likely has a TXV which maintains a superheat unless it is not functioning correctly.
  30. Thread: Too all

    by kroberts38
    Replies
    62
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    4,656

    HVAC Student

    Someone is trying to stop a trane.:) :)
  31. Replies
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    747

    HVAC Student

    I would get a third opinion. They should do a load calc on your home most contractors use a rule of thumb 550 to 600 sqft per ton. I ton refers to 12,000 btu of cooling load. The btu stands for...
  32. Replies
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    2,006

    HVAC Student

    O.K lets leave humidity out of the equation. So we are only talking about sensible heat yes a larger unit would reach the set point faster and depending on how well the home was constructed could use...
  33. Replies
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    2,006

    HVAC Student

    Yes you could use two different types of equipment but I thought the whole reason for this was for saving energy, and how much would you save running a dehumidifier and an A/C. You could size the A/C...
  34. Replies
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    2,006

    HVAC Student

    Over sizing by a little probably wont have an effect but 33% will effect the rate moisture is taken from the air. If you have an A/C unit that is too big it will not take care of the latent heat only...
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    3,404

    HVAC Student

    Hey Shophound if you shut one of the vents in a car it does not reduce the amount of airflow over the coil. It instead redirects the air to another vent, air is lazy it takes the path of least...
  36. Thread: Manual J

    by kroberts38
    Replies
    4
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    383

    Manual J

    Yes the house is going to be broken into 4 zones, 4 tons to each all water source heat pumps.
  37. Thread: Manual J

    by kroberts38
    Replies
    4
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    383

    Manual J

    I have a quick question about manual J book. I read through it last night and it does not say but is this book limited to the amount of square feet a home can be? I just started working for...
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    HVAC student

    I have read almost all the links that have lead to this one. I am confused as to how all these products fit into the HVAC system. I have just completed 3 years of HVAC training at Tidewater Community...
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