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  1. Replies
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    Since you have a thermistor as the temperature...

    Since you have a thermistor as the temperature sensor, the goal is to not introduce more resistance to the current flow than what the thermostat would expect. If it's a short distance, one of the...
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    I think if you actually measured the 4 ton coil...

    I think if you actually measured the 4 ton coil you'd see the surface area, fpi and number of tubes is very close to a 3.5 ton, 13 SEER coil. Most higher SEER coils are simply bigger heat exchangers...
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    5,847

    Save your money. After you see the cost to do as...

    Save your money. After you see the cost to do as you plan I doubt you'll be so enthusiastic for the little savings involved. Furthermore, as dust and other material settle on the reflecting material,...
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    Effectively, they are the same other than the dye...

    Effectively, they are the same other than the dye to make sure diesel fuel is taxed.

    HOWEVER, in winter, diesel can be cut with kerosene to keep it from gelling in the truck/car tank.
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    Good plan.

    Good plan.
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    5,847

    The ducting in the crawl space is metal with...

    The ducting in the crawl space is metal with insulation. I have not needed a dehumidifier due to the lack of humid air infiltration and the benefits of a good vapor barrier. It's far easier to...
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    I am also a low country dweller. I have done the...

    I am also a low country dweller. I have done the following and it's worked perfectly. First, cover the entire dirt floor of the crawl space with thick poly. Overlap the sections. Cut slices in the...
  8. Unless you know the overall heat loss rate in...

    Unless you know the overall heat loss rate in BTU/hr, it's impossible to know how many cycles per hour a 2 degree temperature differential setting will produce.
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    I think your problem may need the electrician to...

    I think your problem may need the electrician to check the size and connection quality of the house wiring especially the outdoor condenser connection and main house feed connection. The load of the...
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    It seems radiant flame sensors are a relic now...

    It seems radiant flame sensors are a relic now but some dryers use them. From my understanding, essentially they're a normally closed bimetal switch with a glass window exposed to the flame. Once the...
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    Thank you for your help.

    Thank you for your help.
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    I'm curious, based on the CNT1845 description...

    I'm curious, based on the CNT1845 description contained in the Trane literature: "Main control 1 stage, 25 volts AC min flame current 1.0 microamps". That implies this control is a normal flame...
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    Thank you for your reply. The complete model...

    Thank you for your reply. The complete model number is TUE040A924HO. The part list specifies a Trane CNT1845 which was, as of July, 1995, the White Rodgers 50A52-102. White Rodgers no longer lists...
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    Trane TUE040 Ignition Control

    Does any Trane dealer know if, on the older TUE040 furnaces (1995 vintage), the replacement ignition control for the old White Rodgers 50A52-102 (obsolete) is now the 50A55-843 using an adapter for...
  15. Thread: Gas Line Traps

    by wendel
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    1,104

    Maybe trap is the wrong term. It may be called a...

    Maybe trap is the wrong term. It may be called a drip leg?
  16. Thread: Gas Line Traps

    by wendel
    Replies
    8
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    1,104

    Gas Line Traps

    I have two Trane gas furnaces that were installed in 1989 in my attic (not conditioned space). There are no traps (drip legs?)for the gas line. Is that a safety issue or does the attic location make...
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    Check the cover of the finned tune sections....

    Check the cover of the finned tune sections. Sometimes there's a metal flap on the top than can be closed thereby stopping the air from flowing over the finned tubing. If not, any other means of...
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    Ask the installer about slowing the air flow down...

    Ask the installer about slowing the air flow down to 350 cfm/ton and adding a TXV to help with your local humidity. If the AC system is oversized, you may have poorer humidity control at 400 cfm/ton.
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    Natural gas is back down to ~US$7 Mcf. The...

    Natural gas is back down to ~US$7 Mcf. The hurricane effect didn't materialize this summer. Watch the thermometer and inventory statistics to know where this price may go.
  20. Montreal, earlier you mentioned using varistors...

    Montreal, earlier you mentioned using varistors as a means of mitigating arcing damage to contactors. On a simple 240 volt, SPST contactor, how would you wire the varistor? Does the arcing originate...
  21. Thread: 2 Filter/Dryers

    by wendel
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    4
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    536

    I had a new condenser unit installed in a split...

    I had a new condenser unit installed in a split system AC. The installer added a filter/dryer on the liquid line. I noticed on the condenser specifications that it already has a filter/dryer. Is...
  22. You might find this study interesting. It's about...

    You might find this study interesting. It's about documented causes of CO poisioning. I couldn't find any heat exchanger crack issues mentioned. I think those documented causes are very self-evident...
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    I would only add that a few mouse baits might...

    I would only add that a few mouse baits might save your compressor blanket as well as the condenser wiring.
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    It could be the contactor. Pull the condenser...

    It could be the contactor. Pull the condenser disconnect so there's no power to it. While you're outside, have someone call for cooling (activating the contactor). Is that the noise you hear? If not,...
  25. "Do I simply put 1" styrofoam board in each...

    "Do I simply put 1" styrofoam board in each opening and seal it with caulk? Can anyone point me to a book or link with information on sealing the space off?"

    That's what I did and it's worked...
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