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Type: Posts; User: PullaVac

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  1. Replies
    34
    Views
    2,490

    I have used dye with good success, sniffers with...

    I have used dye with good success, sniffers with good success, but some of the hardest leaks to find, I found with my ultrasonic sound leak detector. It really amazes me how well it works. I once pin...
  2. Replies
    33
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    3,050

    If your ducting is as the energy rep says it is,...

    If your ducting is as the energy rep says it is, than you really don't have to do a complete change out on the whole ducting system. Add another return duct, 16" or 18". Then after having or doing a...
  3. Sounds like your system may have bad valves, and...

    Sounds like your system may have bad valves, and overcharged,if it is a receporcating compressor.If it has a metering device (orfice) than the opening in it will always be the same dimension. If its...
  4. Replies
    5
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    1,008

    If your going to replace the ducting and up grade...

    If your going to replace the ducting and up grade it with the minimum R-value, I would suggest that you find a contractor that is capable of providing a Manual J heatload and Manual D ducting sizing...
  5. Replies
    3
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    579

    If you already don't have them, try the new...

    If you already don't have them, try the new digital programable setback thermostats. Use plenty of good window shading, curtains and blinds and even solar screens. Good door seals, thresholds, and...
  6. Replies
    3
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    741

    ac air intake

    I was taugh that your return sizing needs to be 20% bigger minimum than the total supply. This has always worked well for me. I have seen plenty return air grilles that were sized correct, but to...
  7. Replies
    4
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    1,559

    duct gain/loss

    Oh!, by the way those values are not degrees, but percentages (%). I got carried away with my hunt and peck typing, and pecked the symbol for degrees.
  8. Replies
    4
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    1,559

    These are the heat loss/gain for the Fort Worth,...

    These are the heat loss/gain for the Fort Worth, Texas where I am located.
  9. Replies
    4
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    1,559

    According to Wrightsoft Heatload calculations and...

    According to Wrightsoft Heatload calculations and software. Temperatures from your heat souce below 120*F from electrical strips/ Heat pumps. With ducting exposed to outdoor ambient,(attic,...
  10. Replies
    16
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    1,595

    I checked with factory reps before I did the...

    I checked with factory reps before I did the install. There commits, where deep and long vaccum with a good nitrogen purge.
  11. Replies
    16
    Views
    1,595

    Virginia Kmp makes a cleaning and flushing...

    Virginia Kmp makes a cleaning and flushing chemical for cleaning out systems that have compressor failures and burnouts. It leaves no residue. You can also use acetone to flush out your copper lines....
  12. Replies
    18
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    3,720

    Considering some of the wild architectual...

    Considering some of the wild architectual drawings, that are built into houses, it's a wonder they hand any place at all to install the indoor unit. Some of these homes really make you earn your...
  13. Replies
    18
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    1,918

    You need to take a look at the whole picture. How...

    You need to take a look at the whole picture. How old is the house? What type of insulation is in it and what is the guessatmated R factor of insulation. What type of windows, which way are the...
  14. Replies
    16
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    1,929

    First,get a heaload calculation done on your home...

    First,get a heaload calculation done on your home from a reputable dealer. Contact the closet ACCA (Air Conditioning Contractors of America) branch office nearest you for a list of reputable dealers...
  15. Replies
    2
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    918

    because the scroll compressor doesn't have any...

    because the scroll compressor doesn't have any reed valves in them, it makes for a much better compressor. They can take a floodback situtation much better than the old reciporcating compressor....
  16. It is not uncommon to use 5 ton coils w/ 4ton...

    It is not uncommon to use 5 ton coils w/ 4ton condensers to increase the seer rating. Many manufacturers do this to up the seer ratings. This works well, but the refrigerant metering device (piston...
  17. Replies
    9
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    2,839

    Your evaporator coil is more than likely ok. Some...

    Your evaporator coil is more than likely ok. Some manufacturers of condensing units supply new/correct size metering orfices with their condensers. I have installed many a after market evaporators...
  18. Replies
    40
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    7,517

    Hamish Obviously,the furnace has been working...

    Hamish
    Obviously,the furnace has been working for some 14 years.My question is, what prompt the service call to change out the Nordyne HIS 903758 on 3/31/04?? I am assuming that everthing was...
  19. Replies
    6
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    990

    Any chance I could get a peek. Never seen a flat...

    Any chance I could get a peek. Never seen a flat rate book, but I have basically been flat rating on my own a little. Being a one man show, owner, operater, sales, and head bottle washer, I hear they...
  20. Replies
    15
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    1,642

    R-12 replacement or not

    Hvacdoctor, I have (2) 30lbs. bottles of R-12, still sealed never been open. I considerd selling them if the price is right.
  21. Replies
    8
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    3,354

    At least no smaller than the supply.

    At least no smaller than the supply.
  22. Replies
    8
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    3,354

    In college we were instructed to size the returns...

    In college we were instructed to size the returns at 20% bigger than the supplies.
  23. Replies
    18
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    2,498

    you might look at the location of the T-stats. I...

    you might look at the location of the T-stats. I found one that was 6'3" above the floor. Are they in the proximity of their respective units. Check for air flow through the t-stat wire hole in the...
  24. Replies
    15
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    3,720

    dual fuel HP system

    Well, the homeowner was the one that bought the T-stat. Paid good money for it, he said. Manage to get the HP to cool and heat by programming the RTH7400D, to tell HP that it was a stand alone unit...
  25. Replies
    15
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    3,720

    duel fuel system

    Thanks for all of the helpfull information. This is what I found. A Goodman HP with a Goodman 80 AFUE furnace for backup heat. It had a Honeywell T-stat that was about 6 to 10 years old. This old...
  26. induce draft motor runs all time

    I have had similar problems and a few others with Trane. Most of the time, the problems where indicitive of polairty problems. Trane control boards a very sensitive to incorrect polarity conections....
  27. Replies
    11
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    1,341

    filter dryer

    Baldloonie,
    First time I have heard of anyone installing a filter dryer inside near the coil. Never seem one before, istalled that way. Curious, is there any benefit in that method or reason for...
  28. Replies
    15
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    3,720

    I am getting ready to take a look at a duel fuel...

    I am getting ready to take a look at a duel fuel system, first time to do so. I have not ever had the experience to work on one before. It is heat pump/ gas furnace system. It belongs to a friend of...
  29. Replies
    24
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    6,241

    Sounds like and looks like he is a...

    Sounds like and looks like he is a do-it-yourselfer, that couldn't. Installed the gas valve himself and didn't want to take the all of the credit.
  30. Replies
    11
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    1,341

    Goodman brand AC/Heat pump systems come from the...

    Goodman brand AC/Heat pump systems come from the factory with filter dryers installed. It a good common practice to install a new liquig line dryer in a new system to protect it for forgien...
  31. Thread: HVAC Systems

    by PullaVac
    Replies
    13
    Views
    1,702

    Gemmint, there are alot of goog brands out there....

    Gemmint, there are alot of goog brands out there. The biggest problem is in the quality of the installation job. The good soldering practices, deep vaccum pulls, and proper refrigerant charging to...
  32. Replies
    5
    Views
    1,294

    It's hard to say if the unit is good or not, with...

    It's hard to say if the unit is good or not, with no refrigerant in the system. If the system had had refrigerant in it, you could have pumped it down and checked the pressures as it approched 0...
  33. Replies
    26
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    4,452

    The black sooting is indicitive of all fossil...

    The black sooting is indicitive of all fossil fuel burning. It is the lack of complete combustion and lack of proper fuel/air mixture. Sooting usually comes from not enough air or too much fuel. In...
  34. Replies
    17
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    2,798

    Don't know much about Unico, but I have learned...

    Don't know much about Unico, but I have learned over the years, that with the conventional AC split systems,(those that are missed match,larger cond. than coil) you can do best by balancing the...
  35. Replies
    4
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    874

    I don't think you are going to find any...

    I don't think you are going to find any difference from round to rectangle. As long as you know the externanl static pressure (in H20) that you have left to work with for ducting design/sizing. With...
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