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  1. a 2 stage a/c with a variable speed blower is a...

    a 2 stage a/c with a variable speed blower is a popular set-up used by us here in nc. I suggest trane's xl20i because it has two compressors which lets you run 50% airflow in the first stage of...
  2. it IS standard practice to cut into the side of...

    it IS standard practice to cut into the side of the blower section of the furnace. Only in an upright vertical orientation though, which i'm sure is what you have. If there's room, i would ask the...
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    i win, or loose depending on how you score it. ...

    i win, or loose depending on how you score it. Heating PM on a gas pak over a pharmacy. Left my jumpers on. Melted all the medicine over the night.
  4. yeah, lets get that straight: NEVER use any line...

    yeah, lets get that straight:
    NEVER use any line flush chemical to flush an evap coil. Pure r11 would work, but no rx11 or pro flush. Pure nitrogen through the coil will work, just remove the old...
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    both - sounds like a horrible design

    both -
    sounds like a horrible design
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    youll only have that "warm" air untill the...

    youll only have that "warm" air untill the outside temp gets very cold; of course i'm sure you already know that, since you brought the idea of duel fuel. I would definitely keep the vs blower for...
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    he said his pan is cracked

    he said his pan is cracked
  8. it's not up to today's code standards. I'm...

    it's not up to today's code standards. I'm referring to the insulation that is. As far as sealing- you cant tell without removing the insulation and inspecting the duct joints? Is there a problem...
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    You really don't need a communicating a/h with...

    You really don't need a communicating a/h with the 20i. Its is designed to use conventional 24v or comm. The TAM7 is a very sophisticated air handler, and even though it isn't communicating like...
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    youll get about 2 tons of capacity if your lucky....

    youll get about 2 tons of capacity if your lucky. Also not doing your compressor lifespan any favors. 70 ft is a pretty long run for 5/16. Are you able to replace the line?
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    Here in NC, there are a lot of companies that...

    Here in NC, there are a lot of companies that have installers who do all the "mechanical" work, and then a startup technition who comes and starts the system and does a bit of configuration. My...
  12. Most major news networks are concerned about the...

    Most major news networks are concerned about the dangers that Hurricane Irene poses to large cities in the North East. In fact, CNN has posted a story about how New York, Philadelphia and New Jersey...
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    A return on each level is code in NC. Don't know...

    A return on each level is code in NC. Don't know about CA though. A single 20x30 return grill on a 5 ton is disgraceful. Its doing more than killing your efficiency, it's killing your unit.
  14. Thread: txv problems

    by pwg11386
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    611

    Still seems strange. Head pressure seems low....

    Still seems strange. Head pressure seems low. With a suction that high you'd expect to see mid eightees inside. So I'm assuming it was hot out. Is the condenser shaded?
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    If you take the panels off that unit to even look...

    If you take the panels off that unit to even look around... you are liable
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    im still a little hung up on this flu pipe. How...

    im still a little hung up on this flu pipe. How do you run pvc thru metal b-vent flashing and keep it from leaking and from looking like horse ****?
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    split the dif. Get a 95% furnace with 2 stage...

    split the dif. Get a 95% furnace with 2 stage a/c brand doesnt matter
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    he probably meant to use a concentric kit for...

    he probably meant to use a concentric kit for intake and exhaust. Since he'll have to get on the roof anyways, ask him to switch out the flashing to one that is designed for pvc. (the one with a...
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    what do you mean when you say the coil is only...

    what do you mean when you say the coil is only getting about 3/4 the way up?
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    i still don't understand the whole r-22 issue. ...

    i still don't understand the whole r-22 issue. Copper lines are re-used all the time. They just need to be flushed. this is a very common practice when the lines cant be replaced. Your contractor...
  21. not entirely true. I was cleaning coils the...

    not entirely true. I was cleaning coils the other day, restarted the condenser and the fan started running backwards, slow start as if it had a bad capacitior, but definatley backwards. I turned it...
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    that seems like it would work, you might have to...

    that seems like it would work, you might have to get a different t-stat though. you need one that makes a call for g during a heat call as well as cool.

    several models can be configured this way
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    it would help if you post the wiring diagrams of...

    it would help if you post the wiring diagrams of the existing furnaces. I would love to draw you a solution, but like i said, cant without existing wiring schematic
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    i'd be a bit reluctant to do business with this...

    i'd be a bit reluctant to do business with this technician. Never mix brands between indoor and outdoor unit. I would try to find someone who is confident that they can fit matching equipment in...
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    yup you got it!

    yup you got it!
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