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Type: Posts; User: lynn comstock

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  1. Replies
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    Don't feel bad about changing the compressor....

    Don't feel bad about changing the compressor. Whatever is blocking the muffler is probably debris from a mechanical compressor failure. It sure wasn't chewing gum.
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    Test: Find a way to bubble some air in your home...

    Test: Find a way to bubble some air in your home through some distilled water for a day or two. Then test the PH of the water. The test may need to be repeated if the source is on again - off again...
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    Getting into the trade would make a good new thread

    I have trained dozens of techs over the years. I have hired many promising losers along the way. Attitude is the key to unlocking aptitude. Never stop learning.
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    Me too. I have seen this in food storage (walkins...

    Me too. I have seen this in food storage (walkins and refrigerators) in restaurants. Especially where lemons and onions were stored in open containers. (Environmental.)
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    Interesting. The Ford evaporator is probably an...

    Interesting. The Ford evaporator is probably an all aluminum coil and the irritant is the flux used to bond the aluminum to itself during manufacturing: Chemical: Aluminum Potassium Fluoride In...
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    Collect some powder and have it chemically...

    Collect some powder and have it chemically analyzed if you are serious. With mass spectrometry it doesn't take much of a sample.
    http://en.wikipedia.org/wiki/Mass_spectrometry
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    Who knows? Something is going on. For all I know...

    Who knows? Something is going on. For all I know contamination may be from outside. Air conditioning equipment installed near the ocean corrodes badly because of sea salt in the air from ocean water...
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    I have used 3/8" and 1/2" ferule compression...

    I have used 3/8" and 1/2" ferule compression unions on refrigerant discharge lines at 400 psi without an issue. I would be shocked if these unions would fail or leak at 150 psi.
  9. Check with the local code enforcement officials....

    Check with the local code enforcement officials. The free space needs to be such that firemen do not have to crawl over the equipment to get around the house. It is a safety issue.
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    That is certainly possible for the coil itself....

    That is certainly possible for the coil itself. The manufacture should know. The metering device needs to be designed for R22.
  11. Are you sure that the HX is downstream of the...

    Are you sure that the HX is downstream of the evaporator? If so, it may be made of stainless steel. That works.
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    A common source of chemical contaminants is...

    A common source of chemical contaminants is cleaning products. If you are using a commercial cleaning service, their products are often "stronger" than products used in homes because they save time....
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    No change in noise with the grilles off tells me...

    No change in noise with the grilles off tells me the noise is mechanical and carried on the "wind". Since noise diminishes with distance, the furthest vents are quietest.

    The ECM motor that you...
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    Normal oxidation of aluminum creates an invisible...

    Normal oxidation of aluminum creates an invisible protective coating on the aluminum.

    Check the white corrosion of aluminum info at http://1st-coating.com/corrosion_alloys.htm.

    Chemical...
  15. The dirt and "mold" show that this system could...

    The dirt and "mold" show that this system could use better filtration or filter serviceing after replacement. Lots of air handers have draw through coils.

    The real concern here is the sweating...
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    The fact that the Payne dealer did not advise you...

    The fact that the Payne dealer did not advise you that the 15 SEER unit will not acturally deliver 15 SEER troubles me.

    Other than that, it is almost a coin toss. Try it.
    If you don't like the...
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    Sounds like the local contractor who is working...

    Sounds like the local contractor who is working for this big box company is doing a very professional job. Check for reports on that contractor rather than the big box company. Good luck.
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    I think the noise is mechanical in origin rather...

    I think the noise is mechanical in origin rather than caused by airflow velocities.
    The blower motor bearings may be the source of the sound. It happens.
    Sound insulation is installed inside of...
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    If these regulators are at the meter, the utility...

    If these regulators are at the meter, the utility is responsible.
    1st case is not piping based on history, but the gas pressure should be checked at the regulator to be certain. Debris from the...
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    I once serviced a system on an office. A mouse...

    I once serviced a system on an office. A mouse had a nest in the blower wheel. The ceiling grilles caught most of the mouse parts. IAQ.
  21. I found no information in the specs that is...

    I found no information in the specs that is useful for duct design and no extended performance ratings. Apparantly you live in Canada as the product is not distributed in the USA.

    I don't see how...
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    It really depends on the peak load capacity of...

    It really depends on the peak load capacity of the utility. Cutting AC load reduces peak load and makes the utilities more profitable. Why? Because peak loading consumes the most expensive...
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    New construction gets inspected when there is a...

    New construction gets inspected when there is a water and electrical hookup.
    In our area (AZ) most replacement equipment is not inspected because contractors do not get permits. I imagine that this...
  24. Next time, use an 8 foot ladder.:grin2:

    Next time, use an 8 foot ladder.:grin2:
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    Too small a differential between on and off is...

    Too small a differential between on and off is not likely to damage the thermostat.
    Pity the compressor and contactor if the on and off cycles go staccato. With luck the fuses will fail first.
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    Trust your nose.

    Trust your nose.
  27. Replies
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    That is certainly possible. Who knows the mind of...

    That is certainly possible. Who knows the mind of an ingineer:D?

    The location and design of the temperature control could be a factor. If the design minimized the number and severity of...
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    "I'm sorry. I have a family and obligations that...

    "I'm sorry. I have a family and obligations that I must take care of. I can give you a 10% discount for cash, for hardship, senior discount, military discount or whatever, but no more."

    Be sure...
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    Sounds like you work too cheap already. If you...

    Sounds like you work too cheap already. If you are better than hack quality, you need to charge enough to provide for yourself and family. IF you can't do that, you should not be in business.
    ...
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    The contractor is the most important part of the...

    The contractor is the most important part of the equation.
  31. Why are you trying to design the ducts? This is...

    Why are you trying to design the ducts? This is the contractor's job. If you don't trust them, keep looking.

    The variable speed fan is a strong fan. Larger trunks and branch ducts are better. The...
  32. That may or may not be true. The duct fittings,...

    That may or may not be true. The duct fittings, the duct length and roughness, and the system fan matter a lot. Also the return duct and the filter matter as well.

    The fan simply creates a...
  33. Choose the contractor, and let the contractor...

    Choose the contractor, and let the contractor give you choices to meet your needs.
    http://www.proctoreng.com/articles/bigger.html
    http://www.michiganheat.com/epa-facts/016.pdf
    If you don't pay for...
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    Good suggestion. Welcome to HVAC-talk. Go pro...

    Good suggestion. Welcome to HVAC-talk. Go pro when you get more posts up.
  35. Ask for the ARHI certificates for the proposed...

    Ask for the ARHI certificates for the proposed systems.
    215062

    215072
    Ask for the duct static pressure readings and have them explain why they are important. If the brush it off, find another...
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    Welcome. When the compressor forces the...

    Welcome.

    When the compressor forces the refrigerant through smaller lines, it creates higher refrigerant velocities and a higher pressure drop due to increased friction.

    In the future, when you...
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    I see that you can write and communicate in...

    I see that you can write and communicate in complete sentences and your spelling is OK. That alone is a great plus in the job market. Take a college course on writing.

    Advancement is up to you....
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    Cost of school tuition = $17k. Cost of living...

    Cost of school tuition = $17k.
    Cost of living without income for 10 months = $10K (1k per month.)
    Income not earned in 10 months of schooling = $12.6K (at $7.25 minimum wage.)
    Total cost of...
  39. The contractor matters more than the equipment,...

    The contractor matters more than the equipment, ALWAYS.
  40. Replies
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    That is my understanding, also. However, when...

    That is my understanding, also.

    However, when the duct leakage test is performed with a blower door using the subtraction method, isn't that done at cfm50?

    When duct ESP in the field is often...
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    Making the changes you suggest will decrease...

    Making the changes you suggest will decrease capacity and efficiency. Don't do it.
  42. Replies
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    I think you are on to something. :D Obuscation...

    I think you are on to something. :D Obuscation and Mendacity work too.
  43. Replies
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    Shophound when you say, "Texas...

    Shophound when you say, "Texas flexductomaticflyingspaghettimonster", are you Texans claiming credit for this travesty of ductwork? :D
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    So is the total leakage 14% including duct...

    So is the total leakage 14% including duct leakage, or 17% including duct leakage? Is this tested at CFM50 for both?
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    Duct leakage is a specific kind of envelope...

    Duct leakage is a specific kind of envelope leakage that is fan driven. I have no idea how they determined how to split out duct leakage from the rest of the envelope leakage.

    The DOE document is...
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    I think REM/RATE is a standardized form used to...

    I think REM/RATE is a standardized form used to collect the calculated heat load details. Their claim is not about duct leakage but about the accuracy of the projected cooling energy use compared to...
  47. Since there is no source of heat to legitimately...

    Since there is no source of heat to legitimately start the fan, I belive that the fan swich is defective. Live with it or replace it. It is not a safety issue.
  48. Replies
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    The default duct heat gain and air leakage for...

    The default duct heat gain and air leakage for Manual J v7 is 15%. This has worked well. I believe that they also had fudge factors built in to make it work. Thus the real allowance was higher than...
  49. Is this furnace located in the attic or a hot...

    Is this furnace located in the attic or a hot location?
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    Welcome. Go to...

    Welcome. Go to http://hvac-talk.com/vbb/forumdisplay.php?f=1 and find the button at the top left side of the screen that says, "NEW THREAD", and start a new thread with your question. Add more...
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