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  1. Replies
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    We recieved our wowtac a2s's and i was very...

    We recieved our wowtac a2s's and i was very impressed with the construction. They seem solid. I like the way the mode cycles. You click the button to turn it on and off and hold it to cycle the power...
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    The 0* superheat i referred to was a piston...

    The 0* superheat i referred to was a piston metered ac. It was quite a curiosity to me. It was only at 105* outdoor with a fairly low indoor wet bulb.

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    I have always wondered how it works so well. The...

    I have always wondered how it works so well. The dramatically lower power consumption compared to conventional systems seem to indicate that is must not be too bad.

    Sent from my rotary telephone...
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    I dont remember them mentioning a required...

    I dont remember them mentioning a required superheat number when i went to Copeland compressor school. But they do mention that the suction line temp shouldn't be above 65* in normal operation or the...
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    And i expect the txv would not hunt much at all....

    And i expect the txv would not hunt much at all.

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    I figured the same. Also the evaporator would be...

    I figured the same. Also the evaporator would be very efficient becsuse it would be plenty well fed. And the compressor would have less superheated suction vapor so it would run nice and cool.
    ...
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    That is where the thought came from. I just...

    That is where the thought came from. I just wondered what else it would effect.

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    Also just to clarify. I dont plan on doing any of...

    Also just to clarify. I dont plan on doing any of these things in the field. Its just food for thought.

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    It seems to me like if nothing else the...

    It seems to me like if nothing else the compressor would run cooler due to lower superheat.

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    I thought of another non conventional idea. What...

    I thought of another non conventional idea. What effect would it have if you put the txv outside?
    Just weld it in after the liquid line service port, weld an equlizer port in the vapor line to leave...
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    I don't know but it doesn't sound like a good...

    I don't know but it doesn't sound like a good idea.

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    How should i understand these numbers? R22@ 40*...

    How should i understand these numbers?
    R22@ 40* 83.28 psia 21.688btu/lb liquid enthalpy 108.191btu/lb vapor enthalpy

    Do those numbers tell me the latent heat of vaporization? If so which one?...
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    I just ordered three through United Refrigeration...

    I just ordered three through United Refrigeration my self. The price was good although far higher than Schrader valves.

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    We had a trane snowball with a bad start relay...

    We had a trane snowball with a bad start relay that was drawing like 90 amps a second at a time till it would shut off on internal overload and it never blew the 30 amp fuses

    Sent from my rotary...
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    They're not totally unique I thought they were...

    They're not totally unique I thought they were unique to American Standard / Trane
    I I'm trying to get a replacement myself for a 2015 American standard package unit the guys at the Trane...
  16. It seems like if 14.7 PSI was able to crush it...

    It seems like if 14.7 PSI was able to crush it from the outside it wouldn't hold up to refrigerant pressure on the inside.

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  17. Could the either reduced operating pressure or...

    Could the either reduced operating pressure or possibly being in a vacuum when the water hammer hit have contributed to water hammer being capable of causing that damage? I don't have the slightest...
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    I could be wrong but i think the suction pressure...

    I could be wrong but i think the suction pressure would stay roughly the same.
    I know i could increase capacity by running the coil at 50* instead of 40* but then i lose latent capacity. And i am...
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    Ok i am not shure where i would find the numbers...

    Ok i am not shure where i would find the numbers for normal refrigerants so i will use r718 here goes.
    So 1 btu raises 1lb of r718 1*
    970.4btu will vaporize 1lb of r718

    So a 3 ton system would...
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    I sort of think i answered my own question. I...

    I sort of think i answered my own question. I think that the amount of heat capacity gained by an extra 50* subcooling would be just a drop in the bucket compared to the latent heat of evaporation...
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    Ok i think i am getting your point now. I...

    Ok i think i am getting your point now.
    I addressed that in the original design by using a txv. That is why i was wondering if it would do the same amount of cooling with less mass flow and cause...
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    I am assuming that if the liquid is 100* or 50*...

    I am assuming that if the liquid is 100* or 50* the volume probably stays fairly consistent. And i am also going with a pressure of 110* for whatever refrigerant this theoretical system may be. So...
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    Lets just say that the heat exchanger is a...

    Lets just say that the heat exchanger is a miracle of engineering and cools the 100* liquid to 50 or lower. How would that affect the metering device?

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    Why is that? Sent from my rotary telephone...

    Why is that?

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    Well this is not a new idea. My boss did it...

    Well this is not a new idea. My boss did it before i was born but he did not try to quantify the results.
    Also i found a patent for this very thing on ptacs and window units along with using it to...
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    I was supposing that both systems had sufficient...

    I was supposing that both systems had sufficient subcooling. Lets just go with 10* before the condensate heat exchanger.

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    Also maby you could set the charge for lower...

    Also maby you could set the charge for lower subcooling at the condensor and run lower head pressure.

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    I mentioned fuses because it seems they dont blow...

    I mentioned fuses because it seems they dont blow as often from things like that. I see breakers trip much more often. I was thinking that a fuse would likely not have blown in a similar situation. ...
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    Maby its internal overload didnt trip quick...

    Maby its internal overload didnt trip quick enough. It seems that breakers blow a lot faster than fuses.

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    Dont hold me to it but it seems like most lifting...

    Dont hold me to it but it seems like most lifting devices are very much under rated so you would likely be fine. But if it is not high quality i wouldn't risk it. On the other hand if someone is...
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    Would the cooler refrigerant have more cooling...

    Would the cooler refrigerant have more cooling power thus causing the txv to close more increasing head pressure and load on the compressor?
    Would increasing airflow fix that problem resulting in...
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    Now what if we take that same base 3 ton system...

    Now what if we take that same base 3 ton system and recover some of that cooling that is lost down the drain by using the cold condensate to cool the liquid line below ambient?
    How what affect would...
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    Thats what i thought. And i am pretty shure it...

    Thats what i thought. And i am pretty shure it was a large well known company. I am the guy in a red tahoe without a logo. [emoji3]

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    They are all rooftop package units. So the traps...

    They are all rooftop package units. So the traps have to be outside. I often just put a trap with no drain line its free cooling for the roof. When i clean them i usually take the panel off and...
  35. Thread: GOODMAN

    by R600a
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    I have never had a problem my self old Rheems can...

    I have never had a problem my self old Rheems can be tricky though. Now when my buddy has to put one together i just stand back and watch because it is so entertaining. I am convinced that sheet...
  36. I use leak lock thread sealant. It dont come un...

    I use leak lock thread sealant. It dont come un done when i am done.

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  37. I think it would be easier to figure if you...

    I think it would be easier to figure if you connected the fan to the fitting and took static pressure reading but I could be wrong on that too.

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  38. I am going to take a stab at it. I think it...

    I am going to take a stab at it.

    I think it would flow around 310+ cfm at a pressure drop of 510 pa or 2.09 in wc roughly the equivalent of 100 ft of 5 inch steel duct

    I came up with this off...
  39. I would keep a tube of pipe dope in the bag with...

    I would keep a tube of pipe dope in the bag with a manometer if you decide to use it.

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    The most common traps in my market are the little...

    The most common traps in my market are the little pvc v traps. I dont use them but i shure clean and replace a lot of them

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    That is good to know. I will try them now that i...

    That is good to know. I will try them now that i know that.

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    I showed my boss the wow tac headlamp and he had...

    I showed my boss the wow tac headlamp and he had me order 3 so we will report back after we get some attic time in wirh them. He seems to think $25 worth of batteries in a week is a bit excessive so...
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    Since you like easy traps I just have to ask cuz...

    Since you like easy traps I just have to ask cuz I've never actually held one in my hand I saw them on the Shelf but I honestly thought that they were a joke. Is that clear part soft plastic tubing...
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    I think that is because it is a common drain for...

    I think that is because it is a common drain for multiple units. It winds up putting a lot of strain on the drain pans though.

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  45. I try to be really careful with pipe dope because...

    I try to be really careful with pipe dope because I have noticed that most of my gas valve failures on newer furnaces have been ones that the installer used lots of pipe dope on.
    And some of my most...
  46. I use a smidgen of leak lock or the yellow...

    I use a smidgen of leak lock or the yellow reactor seal if it's completely dry but usually there's enough of the assembly grease left that I just put it back together.

    Sent from my rotary...
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    I think they were charging by the pound of...

    I think they were charging by the pound of pvc.[emoji23]

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    I saw a couple techs asking the salesman at a...

    I saw a couple techs asking the salesman at a local supply house for a manometer and they didn't know the name of it or how to use it so the salesmen who has never used one before was trying to...
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    That is what i would expect also. How do you...

    That is what i would expect also.
    How do you think it would affect latent capacity?
    I think it would increase latent capacity vs a smaller evaporator.

    Sent from my rotary telephone using...
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    With enough other mild problems that could do it....

    With enough other mild problems that could do it. I would not totally trust a meter only test anyway. Sounds like it is staying at locked rotor amps till it overheats.

    Sent from my rotary...
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