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  1. Check the low water probe, wire's either broken...

    Check the low water probe, wire's either broken or there's no water in it. Do you see water in the gauge?
    First thing's first is to verify you actually have water in the jacket, THEN check the probe...
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    Sweet! Thank you. :cheers:

    Sweet!

    Thank you. :cheers:
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    Poodle, That's crazy, I can't even imagine...

    Poodle,

    That's crazy, I can't even imagine that, I once lost about 10 lbs of R22 when a line broke accidentally and I felt so bad.
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    404A 809904

    404A

    809904
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    Woop! Thanks a lot Ice, and everybody else. I...

    Woop!

    Thanks a lot Ice, and everybody else. I appreciate all the help. I'll post a 404A one shortly, hopefully I got it.
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    Yeah, sometimes I hear these stories like yours...

    Yeah, sometimes I hear these stories like yours and It's odd, it's so instilled on us yungins that purgin is illegal, nitro, triple purge, micron gauges is the way to go, no other way, 500 and below...
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    Sorry, I seem to have been misunderstanding...

    Sorry, I seem to have been misunderstanding something.

    How bout this?

    809903
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    I thought I did, if you look at the right side...

    I thought I did, if you look at the right side where it says 124 BTU, that straight up is the 105* mark on the constant entropy numbers, or at least I thought it was.
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    Okay, I think I got it this time, I switched to...

    Okay, I think I got it this time, I switched to R134 to keep it interesting.

    You know me so well, lol I just guessed and called it good.

    I figured out what you were saying afterwards.

    On the...
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    Nevermind, I read your post about 20 times and...

    Nevermind, I read your post about 20 times and looked at the diagram, I got it now, follow the constant entropy OVER until you get the refrigerant temp (105*F) then mark it up and that's the outlet....
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    It goes a little something like this. ...

    It goes a little something like this.

    Hic-Hec=HOC

    Hic= Enthalpy of vapor leaving compressor
    Hec= Enthalpy of Vapor entering compressor.

    So the above would be Hec=96 - Hic=110 = 14 BTU/LBS...
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    Okay, You're right, I Didn't. How do you...

    Okay,

    You're right, I Didn't.

    How do you figure the heat of compression (HOC) measurement?

    Is that right?

    809890
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    Let me get this straight, I think im converting...

    Let me get this straight, I think im converting PSIG to PSIA backwards.
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    Ambient 90*F, 15 TD = 105*F/254.2 PSIG - 14.7 (To...

    Ambient 90*F, 15 TD = 105*F/254.2 PSIG - 14.7 (To make it PSIA) = 239.5 PSIA
    Box temp 37*F, 10 TD = 27*F/ 66.3 PSIG - 14.7 (To make it PSIA) = 51.6 PSIA

    So, here we go. I just copied the R22...
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    Ice, I'm almost done with my chart, I don't...

    Ice,

    I'm almost done with my chart, I don't know if it's correct.

    Give me 15 minutes I'll have it up.
  16. What you posted is not a defrost mechanism. ...

    What you posted is not a defrost mechanism.

    Some walk in's rely on "turning off" as a defrost, that's how a lot of what I work on are.

    But if the issue is that it's freezing up all the time,...
  17. These guys beat me up and chew me up and spit me...

    These guys beat me up and chew me up and spit me out more times than I can count.

    But it's worth it every time.
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    That's what I was missing, I can't believe I...

    That's what I was missing, I can't believe I never realized that.

    I got dragged away to go weld something so I should have a chance to work on this a little later today.
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    And the crowd goes wild. That's what I was...

    And the crowd goes wild.

    That's what I was missing all this time, I never even considered the same concept as the evaporator being applied to the condenser DUH!

    Okay, let me give this a go,...
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    Alright, Entropy has been left to sink in the...

    Alright, Entropy has been left to sink in the ocean by itself, one day though, I will understand it.

    Okay, Ice, I don't know how to figure out what my head pressure is based off my ambient, not...
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    Lol. Just wanted to throw it out there. But...

    Lol. Just wanted to throw it out there.

    But let's stay on the topic of enthalpy and entropy for a minute here, I'm trying to understand it.

    So here's a question, how do you find out what your...
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    Okay, so I read the 5-200 Sporlan bulletin,...

    Okay, so I read the 5-200 Sporlan bulletin, that's where I got the chart from I posted.

    So I get the Enthalpy part, it's useful for designing systems or I guess, picking refrigerants for...
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    Alright PHM, true, and I understand that part of...

    Alright PHM, true, and I understand that part of Entropy as wasted, much like the heat added to the refrigerant as a vapor when it's compressed, as shown on the chart, it's not usefull. But I don't...
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    So you can use it to see what the cooling...

    So you can use it to see what the cooling capacity is of a refrigerant or map it out on the chart to figure out what pressure you want to operate within?

    What is "H" Enthalpy?

    Essentially you...
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    Right, Entropy from what I understand is...

    Right, Entropy from what I understand is essentially energy that's wasted or useless, much like the compression cycle where the vapor is compressed and superheated, all the energy you put into that...
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    Right, so the enthalpy increase and decrease, in...

    Right, so the enthalpy increase and decrease, in order for you to get the cooling you want, you have to compress the vapor which adds heat, heat that you can't use for anything, it's just a byproduct...
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    Can we discuss what Entropy and Enthalpy means. ...

    Can we discuss what Entropy and Enthalpy means.

    My boss and I have been trying to understand it for an hour now. I think my brain is actively trying to make me forget the word to reduce the amount...
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    I'm so lost on that diagram.

    I'm so lost on that diagram.
  29. Just charge it off superheat and subcool, it's...

    Just charge it off superheat and subcool, it's not as easy but it's the only other way to do it other than factory.
  30. Yeah, I have to agree, bypassing safeties is a...

    Yeah, I have to agree, bypassing safeties is a risky thing.

    If you KNOW it's cutting out on high head, something's gotta be wrong, the only times pushing in the contactor would be remotely OK...
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    Wow, that's interesting. I far from understand...

    Wow, that's interesting.

    I far from understand it but that makes some sense.
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    :cheers: I looked at some Enthalpy diagrams...

    :cheers:

    I looked at some Enthalpy diagrams yesterday, trying to understand it.

    What do you use it for?
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    That is very true. Myself included.

    That is very true.

    Myself included.
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    We're all just a bunch of Punkah Wallahs ...

    We're all just a bunch of Punkah Wallahs

    https://en.wikipedia.org/wiki/Punkah_wallah
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    Fair enough, it's true. I'm thinking more in...

    Fair enough, it's true.

    I'm thinking more in line with refrigeration as that's what I mainly deal with, where you don't get much wiggle room in terms of airflow or SST.
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    Not quote I don't think, Eventually you would...

    Not quote I don't think,

    Eventually you would have no refrigerant in the coil and so you wouldn't be removing any heat or the coil would just freeze up blocking your heat transfer.

    Or you would...
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    French, it must be french you are speaking.

    French, it must be french you are speaking.
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    Idontgetit, Thank you for the response. The...

    Idontgetit,

    Thank you for the response.

    The intitial question was right at the outlet of the txv when the temp drops, how does it do that.

    That was what the whole discussion was regarding,...
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    Less airflow means less heat transfer, that means...

    Less airflow means less heat transfer, that means your refrigerant would be going through and potentially not vaporizing, therefore being colder and colder, it would reduce the refrigerant flow.
    ...
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    That would be cool, actually. Do a system with...

    That would be cool, actually.

    Do a system with a SG right at the outlet of the TXV or cap tube, almost like a testing or teaching system and see what happens to the juices.

    I've seen...
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    Yeah, exactly, I think each to his own in this...

    Yeah, exactly, I think each to his own in this case, you are probably correct though, probably looks more like foam.
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    Ice, I understand and I think the variety of...

    Ice,

    I understand and I think the variety of examples did help me understand it, I seem to visualize it as droplets myself, or a liquid stream with individual droplets. It's true, I think everyone...
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    No worries, I think it's a valid sidetrack since...

    No worries, I think it's a valid sidetrack since it relates to the subject.

    What was it about anyways? Using condenser fan cycling to reduce the flash gas?
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    Very true, very lucky indeed :)

    Very true, very lucky indeed :)
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    I can go really, really deep in details if it's...

    I can go really, really deep in details if it's warranted but if you guys say it's just semantics and it don't matter, works for me.

    I'm just trying to learn all there is to learn about it.
    ...
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    PERFEKT. F'ing love it. I'll go with that,...

    PERFEKT.

    F'ing love it.

    I'll go with that, thanks a bunch guys, though I know you all love to argue about these things, just know, that I did learn a lot in the process and I do appreciate you...
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    Could very well be. But look at the past...

    Could very well be.

    But look at the past posts, Throughout this whole thing Bberme and anyone else who talked has been saying it's sacrifical droplets that vaporize completely.

    ICE is saying...
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    Perhaps, But it's still a valid question.

    Perhaps,

    But it's still a valid question.
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    Okay, So here's where you guys lost me again....

    Okay,

    So here's where you guys lost me again.

    Ice is talking about PART of the liquid or PART of the droplet vaporizing to cool itself off to match the new temperature dictated by the lower...
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    Okay cool. Right, makes sense. What I said...

    Okay cool.

    Right, makes sense. What I said above is correct?
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