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  1. Replies
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    Around here, a non-fused switch is used for the...

    Around here, a non-fused switch is used for the 120v feed to the furnace/air handler. That circuit should already be protected by a 15 or 20amp breaker.

    As far as the GFCI, I would be concerned...
  2. Replies
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    4,249

    Was the evap coil replaced with the condenser...

    Was the evap coil replaced with the condenser unit? How old?
    When was the last time evap was cleaned?
    Is it a fixed (cap tube, piston) or a TXV?

    Make sure indoor vents are open. Too many closed...
  3. Replies
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    171,477

    I have always questioned how much air a turbine...

    I have always questioned how much air a turbine can actually move. They seem to be nothing more than a circular propeller sticking up in the air. Now if there was a small fan blade on the other end...
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    Manual J will definitely get you thinking about...

    Manual J will definitely get you thinking about building construction methods/techniques as they relate to energy conservation. If you are willing to invest the time it should more than pay for...
  5. Replies
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    And vice-versa.

    And vice-versa.
  6. Replies
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    Might as well measure the discharge line temp...

    Might as well measure the discharge line temp close to where it comes out of the compressor.
  7. Replies
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    3,499

    [

    [
  8. I know that TX and FL reciprocates with GA but...

    I know that TX and FL reciprocates with GA but not sure about SC. Try checking out GA website to see what they say.
  9. Replies
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    Now that Obama will keep sending me my...

    Now that Obama will keep sending me my unemployment check I wouldn't either. However, if my little Suzy was hungry I would rethink that one.

    my little Suzy
  10. Burnt start wind wire using hard start kit

    30yr old Rheem builder grade (El Cheapo) condensing unit, 4ton.

    A hard start kit was added last summer as a preventative maintenance thing. I believe it was one of the better Supro units. Anyway,...
  11. You might want to install an access fitting on...

    You might want to install an access fitting on the suction line at the evap and then compare it to the suction pressure near the compressor. Might give you an idea if you have a restriction or...
  12. Replies
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    For what's it worth, an ECM motor is also a very...

    For what's it worth, an ECM motor is also a very expensive motor when compared to the proven, simple, been around for ever, induction motor. About 7X more expensive.
  13. Replies
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    Just to be clear, we are talking about changing...

    Just to be clear, we are talking about changing the size of the heat exchanger but the expansion device is still precisely matched to the compressor/condenser capacity.
  14. Replies
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    Both switches are important bells/whistles that...

    Both switches are important bells/whistles that are normally found on the deluxe units. As a slumlord I consider the high psi switch more important but the low psi is also of value. These switches...
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    Still trying to get a handle on compression ratio...

    Still trying to get a handle on compression ratio with respect to refrigeration. On an internal combustion engine, compression ratio is maximum cylinder volume divided by minimum cylinder volume....
  16. Replies
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    3,363

    I was actually surprised at the thickness of the...

    I was actually surprised at the thickness of the shell on the old recip compressor. Chewed up most of the cutting wheel to get it open. It would make one hell of a "pipe bomb".

    On a hot day...
  17. Replies
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    3,363

    Correct, no doubt it will not be a 13SEER system,...

    Correct, no doubt it will not be a 13SEER system, but they are right back to where they were before the old compressor took a crap, at a minimum cost. Not sure about any 8SEER still out there, 10SEER...
  18. Replies
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    A few more points before this thread goes away. ...

    A few more points before this thread goes away.

    A properly installed R22 unit, for the most part, should never need any freon added during its life.

    In TX, condenser change outs are common...
  19. Replies
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    Crushed suction line

    Older (approx 30yr) Rheem 10SEER a/c unit, 3.5 ton.

    Recently, during residing, discovered the suction line had been crimped down to approx half of its 3/4" diameter. Probably happened when the...
  20. That is true this week but what about next week...

    That is true this week but what about next week or next month or next year. Right now, most electric generation uses nat gas so if gas someday goes thru the roof then electric rates should follow...
  21. I have a similar situation but deciding is a...

    I have a similar situation but deciding is a little easier. I have a 3.5 and a 4 ton unit still in service going on 30 yrs, Rheem units that NPC installed when they built the houses. NPC didn't go...
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    Until such time the lint build-up catches on...

    Until such time the lint build-up catches on fire. A fire starting in the dryer vent is one of the more popular ways of burning down a house. Dbl wall pipe is probably not overkill.
  23. Replies
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    Sounds like the house is fairly well...

    Sounds like the house is fairly well sealed/insulated but other heat generating sources within the home must be considered. Figure on every BTU generated by the house chef on the stove/oven or all of...
  24. Two big beer boxes in a Wal-Mart parking lot...

    Two big beer boxes in a Wal-Mart parking lot built/insulated exactly the same way and have the exact same heat gain down to a gnat's rectum. Box #1 has a 2t unit that runs continously but maintains...
  25. another car analogy (but its not perfect)

    two exact same cars travel 100 miles. Car #1 drives there at a steady 40mph and gets there in 2.5 hrs. Car #2 goes like hell at 100mph but he stops to have a beer every few miles and gets to the...
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