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  1. I show them that the repair cost and potential...

    I show them that the repair cost and potential future repair costs (point at rusty condenser fan motor running above nameplate amps) is already more than half of what a new system costs.
    I tell...
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    9,423

    Hey .. lets put some electronics in a potentially...

    Hey .. lets put some electronics in a potentially hot humid vibrating and magnetically diverse environment and see what happens.
    I think we're still in the stone age when it comes to robotic motors....
  3. Your compressor came all apart inside dispersing...

    Your compressor came all apart inside dispersing garbage into the system. Wiring varnish .. ash .. mechanical shavings etc.
    Replace the drier .. you are doing a cleanup. Your lucky the metering...
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    2,648

    Open bypass or valve reeds bent open?

    Open bypass or valve reeds bent open?
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    418

    This application is on an open business in the...

    This application is on an open business in the height of summer where downtime costs money.
    It's on a rooftop where lugging up extensive test equipment and spending additional time was just not cost...
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    418

    Yeah from now on I will add the phrase, "I can...

    Yeah from now on I will add the phrase, "I can change the compressor ... but I can't change or detect immediately any damage the explosion may have caused".
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    2,648

    "So what the heck is my air compressor doing...

    "So what the heck is my air compressor doing then?"
    pumping air and condensing water.

    I suspect the system had a low side leak and sucked in air falsely raising the condensing pressure.
    There...
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    418

    Fun with explosions and metallurgy

    Had a compressor blow out the terminals in a packaged rooftop unit.
    Replaced the compressor, pulled deep stable vacuum recharged system.
    Four days later .. gas was gone. Leak checked my joints...
  9. You will have only one suction pressure at the...

    You will have only one suction pressure at the compressor, no matter how it's piped.
    Basically you want have the suction lines as similar as possible to avoid different suction pressures at the...
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    1,031

    Buy two long ropes tie up four items. Unless you...

    Buy two long ropes tie up four items. Unless you just like to fish.
  11. Replies
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    2,648

    Air is not condensable.

    Air is not condensable.
  12. I saw it once last year and this year knew what...

    I saw it once last year and this year knew what to do.
    On humid days and on older equipment water tends to sit in pan and gets blown out by air turbulance into crack between pan and electrical box....
  13. Replies
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    3,692

    No superheat means no load. the unit is...

    No superheat means no load. the unit is overcharged or your temperature sensor is broken or your gauges are off.
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    1,181

    What he said .. you can only achieve a certain...

    What he said .. you can only achieve a certain net refrigeration effect with a certain line size.
    for example ... if you are on a boat with a bilge pump ... it may work great when you spill a beer...
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    6,770

    ok lets mount a computer on the back of a motor...

    ok lets mount a computer on the back of a motor and see how long it lasts ...
    lets put another one outside in the condenser ...
    my stuff may not save me 10 cents a day ... but at least
    i don't...
  16. All the numbers in the world aren't going to...

    All the numbers in the world aren't going to aren't going to give you common sense.
    Whenever you as a question about a dynamic system that constantly fluctuates from environmental factors the...
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    723

    Inside harder to service and diagnose vs outside...

    Inside harder to service and diagnose vs outside more chance of environmental factors affecting coil operation.
  18. Replies
    11
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    543

    Every compressor self cools with the suction line...

    Every compressor self cools with the suction line gas. You said bench test ... something tells me the problem wasn't in the compressor.
  19. Replies
    53
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    1,873

    When the control board tries to light the furnace...

    When the control board tries to light the furnace
    It turns on the vent blower
    then checks for vent pressure differential
    if it thinks the vent fan is working it turns on the igniter then opens the...
  20. I charge a TEV system until the superheat...

    I charge a TEV system until the superheat stabilizes. That means the valve has reached it's setpoint and no matter how much more gas you add ... the valve is not going to open any farther. Then I...
  21. Thread: Nest?

    by Dennis.Moore
    Replies
    17
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    830

    They don't have internal batteries so you have to...

    They don't have internal batteries so you have to have a common (ground lead) to power the stat ... if no ground lead is provided they periodically tell the system to turn on (very briefly) to steal...
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    5,380

    http://www.americancompressorinc.net/upload/Compre...

    http://www.americancompressorinc.net/upload/Compressor_Wireing_Diagrams.pdf
  23. Replies
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    303

    Dirty condenser, low refrigerant, bad run / start...

    Dirty condenser, low refrigerant, bad run / start capacitor, bad start assist capacitor, weak overload in compressor. or all of the above. The overload is on the common lead.. pull that lead off the...
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    1,745

    The Joy of Experience

    So I get a ladder call from another tech who won't buy a ladder or a ladder rack. I go to this apartment (walk past another companies ladder) and she says yeah just got a new unit last year ... and I...
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    1,310

    EEV Electronic expansion valve...

    EEV
    Electronic expansion valve
    http://www.munchsupply.com/UserFiles/file/TAM7%20INSTALL.pdf
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