All right, this is day two of the apprenticeship program that we're doing with lake technical college in eustis florida i was on vacation, so bert was teaching day two and day two bert goes over some of the things reviews some of the things that he talked about, The day before and then also goes into the basic refrigeration circuit, so you're gon na get a interesting look into the mind of burt and how he thinks about the refrigeration circuit hope you enjoy. Ladies and gentlemen, we're going to do some hands-on review for safety. Let's go christian any chance, you could tell us exactly how many pounds of refrigerant are inside is inside this tank all right. Let's do this then look at this pro man it's on zero.

Now i already zeroed it out. Yeah, the clock is ticking, no pressure, we're all getting so bored great 16 pounds. Wait, you did the math in your head hold up. Let me check this 16.72.

So how? How did you figure that out, fairway tear weight, yeah, all right, absolutely and the tear weight tells us what 27.7 okay and what does tear weight mean the weight of the can with nothing in it yep exactly all right. So how many pounds are we? What's our total 43. 43 minus 27.7? I can do this 43. minus 27.7.

I did it 15.3. He said something like 16 and that was like, and then i redid the map with the decimal, what a guy, what a guy all right - and he wasn't even here at the class anybody was here yesterday that could not have done that good. I wouldn't have admitted it either. That's great, why don't you guys hook up to the tank? The way we would, let's just not open any of the valves yet, okay, so we'll keep pressure out of the out of the equation.

Let's see, if you can remember, had you ever done recovery before that before before yesterday. Yes, i mean in in vision yeah, but you hadn't done it yourself, okay, uh, while he's doing that. What is the capacity that we should be filling these tanks to for safety? 80 capacity, and how do we know what the tank's capacity is? Anyone uh brian's formula formula, so you can look up the formula for converting what to whatever type of refrigerant the water column yup. You said it ladder the water column.

You said it, okay, go ahead! All right, so, what's the water column on this, anybody, 47.7 sweet, 47.7. Okay, so it has if it was water, we were filling it with full capacity 47. But as we talked about water is a different density than refrigerant. Each refrigerant has a specific density, so you would actually need to do the math.

I think, with fortune a we did last time, it was like multiply it by 6.67 being able to know that and actually making sure that you're filling up to 80 capacity keeps you safe, because why? Because you might be able to fill it up and it'll be fine, but then what happens when it gets warmer? What what expands temperature pressure? You're, always expanding pressure? When you add temperature, you're gon na have a higher pressure. Okay, all right! So this is your recovery machine that you're gon na hook up to you're already hooked up to your system. Uh. Can i just use this one yep better, better, that's great! Okay! Anybody know what this is the cap to that yep all right.

Somebody with gloves put it on show everybody how it goes on, and what does this cap do? When would you use it? Okay, yeah? It protects it from what yeah, because what, if this tank falls - and it hits here before it hits the rest of the tank you're likely with the weight of it. If it falls any height to snap it off and like damion was saying what were you saying about that? They'll go right through a cinder block, hole yeah, so it'll actually fly, but there's a proper form yeah, which you you guys missed out and you're. Never gon na ever probably ever know about this. But there is this: a magical form that if you do with your body, the tank will never hit you.

I got it on video, oh okay, you might hear about it at some point, so it's on video, yeah yeah. We found this out so okay, that's great, and then what else do we got going on here? Transfer, chained, yep, mm-hmm, so uh? Well, somebody volunteered to chain the nitrogen tank in there to the dolly he just asked if he should leave the nitrogen regulator on it. When he's moving it right, because that makes it way more likely to catch and actually snap the top of that off absolutely and if you get hung up just ask anybody around you josh for some help sounds good i'll. Take it out there actually all right guys that sounds good.

You guys should watch this pro. He is actually putting a cap on there. He took off the regulator, he's putting a cap, my man, how many pounds of pressure do these tanks usually come with 2 500? Is pretty typical yeah for a night, big or small, the nitrogen take big or small? Well, i don't. I don't know about yeah pretty much big or small you're gon na it's it's like 2500.

It's pretty typical! Why? What are you seeing? I understand, like those those big nitrogen things like they got ta happen, they have more volume, but not necessarily more pressure yeah. So what like you know, you might be able to pressurize four systems with this 20 systems with the other, both at 200 2500 psi when they first come out. So, let's do the glove cap, glove, clap, all right, so uh go ahead, put on the regulator or actually we'll just pass the regulator we'll just start out with that uh we talked about this yesterday um. What does the first gauge tell us? What's in the bottle? Yep the pressure of the tank yeah, and this one will tell you how much your regulator puts out how much you're actually regulating yep, and then anybody not actually ever touched this regulator, this style, you ask you all right here, just get out of here here.

Okay, so i mentioned it yesterday, but the way that you turn this yeah. Do you remember yeah, it's the opposite, so you close it yeah yeah. So if you're closing it down, then you're pushing against the the valve in there you're pushing the valve open. So, as you close, it it'll allow more pressure from your tank to come out your out the regulated side and then, when it's time to turn off your nitrogen turn off your tank.

What you do first, is you turn off your tank? You let whatever pressure is still sitting in the regulator out, then you back feed this all the way up, so that the next guy who turns on the tank it's not pumped down like this, is what will typically happen. A safety problem you'll have an empty tank and you're trying to get everything out of it. So you crank it all the way down to finish your job. Then you move the regulator to your new tank.

You turn it on well, you've cranked. It all the way down so full pressure that the regulator can produce is now going to just blast out of there, so just make it a habit whenever you're turning it off taking it off. You also back this out right here, yeah so cool. What's some other things you can use nitrogen for besides, just pressurizing a system blow out a drain line, anybody seen a drain line.

Blown out with nitrogen glorious yeah excellent can be a lot of fun, especially when you see all the baby food goo come out yeah. I'm going to try to touch as minimum as possible, so i'm keeping like my gloves off and my glasses off unless i actually get close to something or touch something, so you guys can touch everything. Hopefully that's my goal. If you see me touching something yell at me, put my gloves on or whatever or to back away and take over, so you guys can take over five six hundred psi through it yeah and you can watch on your gauge and you can watch on here.

You can watch the psi and actually see as you're, adding it in if you're hitting something solid, that psi is just going to jump really fast and you need to be ready to actually stop what you're doing and figure out something else best thing to do is Get a ball valve on the end of one of your lines: yeah just have a ball valve on it. Yeah do any of these hoses 200 psi and just open the ball valve. That's what i do yeah! That's great! You can't really so you're pre-setting! That's a really good idea: you're pre-setting, your refrigerant pressure from your regulator to like 200 psi and then on your hose. You have a lot of hoses, have ball valves or just install a ball valve.

I have a hose specifically with a drain drain dog attached to it um before blowing out and that's a good idea. I'm gon na get make sure that my hose actually has a ball valve, so i can pre-set it instead of slowly cranking it and watching it. Yep, that's great good advice: okay in out to our tank, that's all you're missing right out to our tank, which uh which side of the tank would we want to liquid yep you're right, okay, cool! Should i get fastened in um you're good just wanted to show that you did it. I don't see any problems here other than this isn't plugged in which well, i don't understand what what's the what's the issue here, we're just hanging out just trying to hang out here all right, great uh.

Last last safety review would be torches uh. We did this. We went over this. What do we talk about torches and safety, they're scary, they're, scary? What which is the most dangerous of these two oxygen? Because if there's a fire, you feed it oxygen that fire it becomes a bomb right.

So if your warehouse is on fire and you're worried - and you have time to get something out - get your oxygen out - your your acetylene tank might blow up, it might explode, but in the event of a large fire or even something, you know that the flames already Consuming most of the oxygen in that space and it's keeping it contained, but if you have a tank of oxygen or something in there that can feed that boom, you go crazy, whereas if most of your oxygen is contained and you release more gas, it's not nearly As dangerous as releasing as an accident that releases a lot of oxygen to a fire, so either way flammable pressure anything that flammable under pressure is very dangerous. So where is this going to be the most likely to to blow up in the van that's right? An accident falling over forgetting to turn it off that sort of thing, um good. So that's that's pretty good as a review right, yeah, yeah, all right, we've reviewed so we'll move on to today's safety. New safety topic.

Okay, so rumor is there are. There is at least one refrigerant in this training room that is highly flammable and so first one to find that one wins in the meantime, note the different refrigerants that you're seeing and how dangerous they are and uh their class on here. So you can use the refrigerant slider app or you can use the chart that that i showed you on the book page 63 and find out what what safety class they are go whoo all right. It should be good.

We found it well, i didn't find it, but matt did we got one over here? That's not classified a1. So a would be the level of toxicity. I got that right and uh. One would be the level of flammability and most refrigerants that we work around are going to be a1, except for we got one in here right here.

What is it matt, r123 and what's its classification how'd, you find that out through the slider app slider app cool cool that was exciting. So, let's uh, let's not set anything on here on fire. That's what we learned cool thanks, guys, let's move on next! So next we're just going to go over some of the refrigeration circuit. We've been talking about refrigerant all night and safety, but we'll actually do something a little more helpful for our jobs.

Technically, let's go over the refrigerant circuit, so i'm trying to say so: let's go over, find a piece of equipment. Take it apart. We'll follow the circuit talk about it. What i would really like is if you are unfamiliar with some part of the circuit, or you want to know more about a certain part of the circuit.

You ask some questions as we're talking about it, pointing it out. There's anybody here that feels nervous at the thought of being the person who shows everybody else here. What the refrigerant circuit is and actually walks all of us through the pieces of equipment. Is there anybody here that feels nervous about that? Josh great already knew that about you yeah a little bit nervous one part of the circuit christian nodded.

He twitched. I don't want to do it, i'm not i'm not going to make anybody do it. So i'm just trying to gauge like oh and here we go confession, i'm just trying to gauge you know where you guys are with refrigeration circuit, it's so fun, because basic memorization is really important, but each part of that circuit, the layers get so thick with what You can learn and what you can know about it practically, so we should have some fun going into this yeah chad um for homework homework. Everyone just watched, brian's video on yeah, there's a good video basic refrigeration circuit.

You can watch that every day and it would be helpful for your jobs, um. So lesley. You want to grab a leslie. Oh my gosh, i told you i would do that jessica.

I knew leslie in our company that had red hair and looked very similar to you, so i'm going to do that a couple times just like i told damian, i'm going to call him damon jessica. You want to open the air handler. Let's do this one right here, since we got the whole unit, sure you can use someone's drill here. If you like, there's an impact okay.

He said it here just for you, so we're doing the air handler yep. Do you have safety glasses by any chance? I took them off yep, okay, nick you want to watch or open the condenser yeah so we're i want to go inside the condenser and go through the circuit and the inside. So if you could take the top off something i like to tell people when you take the top off we'll just watch, how nick does this so, let's go ahead and just get you some gloves since we talked about this, keep your hands safe. Let me go grab my glue.

You got your own gloves. Okay, teachable moment just happened safety. This is our safety night, definitely verify that the power is off absolutely so and then disconnect the fan, yep and then take your nuts off or make sure that your wires aren't gon na get caught. And then you take the fan blade off.

Okay, so where? Where would you verify that power's off? I would cut this off disconnect box, okay and then i would take my meter and test this. We got a meter and then, before i touch anything i would take. I got one here without leads. She doesn't believe in leads just go on wireless disconnect the wires.

He is absolutely right, so i forgot to safety check that we don't have power for the unit, that's sitting in the middle of the room, because we should not take for granted ever that. What we're working on doesn't have power even when it seems obvious, but um we should that's. That is how you get shocked so yep, so first uh. This will probably be next week's lesson: uh electrical safety.

How do you check for safety? You want to do that. What's the proper way to check if a unit is safe, verify that it's in the hospital? Okay and then you take this little doodad here right there, okay, all right so he's taking the meter and he's turned it to let's, let's go ahead and let's put it on volts, volts yep: it's not your meter! So there you go, okay, verify that it says verify he's got zero, so does it? Does everyone agree that this is the proper way to verify that the unit is safe to work on whoa i saw the lens move. It's actually not the proper way to verify that the unit's safe to work on, because if you get shocked it's because you're ground, so you should always test the ground when you're checking for safety and i've been shocked with this. So the scenario that yep exactly that's safety so now you've touched both legs to ground and you know you're, going to safe.

The scenario went over last night with the breaker losing one leg of power: one leg yep that would show you zero volts on the bottom, where he did and you would still have 120 on each side. So that's how i got shocked, cool all right, you're, good nick! You can go ahead and do your thing i'll. Take it off! Actually, i'm going to go over the refrigerant circuit inside of there. Oh somebody has been playing with this fan, so why don't we unwire the fan and you guys are going to learn this pretty quick about brian one of his pet peeves, which is good, is that he always takes the fan off electrically because of uh.

How easy it is to bend a blade or to cut wires on an edge if you have more pressure than this, you cut wires, and so that's probably the safest way. It looks like let's just get this out of here. Let's just uh put this on our site: okay, refrigerant circuit, the heart of our circuit is the repressor yep and it's what pumps our refrigerant. So what do we got coming into our compressor, low pressure, load, temperature, vapor pressure, yep, low pressure, okay, and which line is that go ahead and touch the line that low pressure, low temperature, vapor refrigerant, you're right? The suction line right here, yep, so the larger one? You have coming into your compressor is going to be your suction line and it's going to be the cold uh, to your hand, usually pull to the touch low pressure, refrigerant, okay and then what do we have coming out? The one that burns yourself yep and abraham's right, it's high pressure, high temperature, high temperature vapor.

Now a lot of people think that liquid comes out of your compressor. That's just like this thing that people go to. They know that liquid needs to be made somewhere and that that compressor looks really important. So you get vapor and liquid out, but no you're not going to be able to compress liquid in this compressor without just smashing the the destroying the compressor slugging it yeah.

Liquid. Can be compromised? Actually it can be yeah technically yeah, but this thing's not built for that. This thing will follow. They can't yeah.

Oh, you said can't: okay, okay! Well, everything can be on one level or another, but yeah. You would need some major yeah you're not going to try to compress liquid you'll, never see anything successfully compressed liquid in the refrigerant circuit, so um. What does this do to the refrigerant that compresses, the refrigerant? So it comes in as a low temperature. Low pressure vapor goes in the compressor, the compressor compresses, the refrigerant once it's compressed.

It goes out because it's compressed as a high pressure high temperature vapor and the like. I said that liquid is really tempting to talk about coming out of the compressor and then start rejecting heat yeah. So we call it the compressor because it compresses the refrigerant smashes the refrigerant, and so the refrigerant coming in at low temperature actually gets becomes high temperature because it has been compressed because the particles in there have been smashed now. We have high friction which gives us that high temperature, so you could come in to something that compresses and without adding any heat, you could compress the substance and it would become really high temperature without adding any heat just by compressing it.

So that's part of the magic of of the compressors that you can manipulate the heat that way and like he said when you do that, you also have high pressure right and that's what gives it the force to actually be shooting out of the compressor. And so that's why that's why it also acts as a pump. It comes in you smash it and it's forcing it out in that direction opens backs up and it's sucking in on the suction line, so cool all right. So where do we go next? If we're a heat pump like we are looking at here, we're going into this valve, what's this valve called reversing valve yep, and if the uh, depending upon which way the valve is, has slid in your your uh, we'll just uh, we'll just follow the circuit in Cool mode, how about we just stick with cool mode, all right, so in cool mode, it's going to come out of that valve and go on what line? Does it come out of the valve liquid, no discharge? So it's still discharged still discharged, but it feeds into the condenser.

So if you see coming out of here, the top here that's looping around. It goes down there into the bottom of that condenser and you have other capillary tubes feeding into different coils. So what state is the refrigerant when it enters the condenser, still vapor yep, still high temperature yeah and then the condenser? Why is it called a condenser because it condenses exactly condenses? Why is the evaporator called evaporator evaporates? Suction line is called the suction line, because it's being sucked back towards the compressor discharge called the discharge line discharge out of the compressor yeah amazing. Did i just blow your mind.

Chad? Are you falling asleep? Okay, so um we are coming in as a hot vapor gas, high pressure and circulating through here and when you take a high pressure, gas refrigerant gas and you're still contained in that high pressure environment. But you start releasing its heat. That refrigerant is going to reach a point, the saturation point where it starts condensing yeah phase change. So how does it that the refrigerant releases - its heat here, this man, defense, sucks there from outside and blows slows it up, rejects the yeah yeah? So it's basically you're sucking the air from here it's going through the coil yeah yeah.

So you discharge you. You need to get rid of the heat that came in on the suction line, so the suction line feels really cold to your hand, but it's actually loaded with heat that it's absorbed from whatever the space is all the heat that has been removed from that space. Is inside that suction line that feels cold to your hand and it feels cold because it's low pressure and it comes in and gets smashed so that you can raise it above the outdoor temperature and reject it using the outdoor air. So the whole purpose of that smashing is to actually raise that temperature of that is already loaded with heat from the evaporator.

Now we're going to raise that temperature above outdoor temperature enough that we can reject the heat that we absorbed from our evaporator. So as that fan runs, it's pulled across these fins and there's a heat transfer. So when you put your hand above the unit and you feel that warm air where'd, that warm air come from the pipe yep from the refrigerant the discharge gas and where did that refrigerant pick up that heat that you're feeling on your hands inside the house, so That heat was literally 30 60 seconds ago inside your living room space floating around and now it's floating around outside right here, same heat, so cool stuff, different air, same heat, same energy, okay, so that state where it starts condensing, but it hasn't fully condensed. Yet what do we call that state saturation yep happens right around here? Yeah? Well, it starts happening pretty pretty quickly in the coil and you're right.

It happens all the way through till the base of that coil, when it's going to come out the liquid line yep on this coil, as you can see it's feeding into the bottom and actually coming out of the top. So but yes, exactly what's happening, okay, so saturation means that we are in a mixed state. It's still in process of changing, so all of the energy that it's getting rid of is not actually when it's in saturation, it's not actually lowering the temperature of that refrigerant. Even though it's getting rid of heat that refrigerant stays at constant temperature, while it's in saturation until it becomes fully liquid once it changes state, then it actually drops in temperature and comes out of this line as a out of the condenser as a yeah liquid high Pressure actually pressure high temperature, liquid yep, and so this liquid um.

We take a measurement on our liquid line to try to prove something. What is it so cool yep? So we try to prove that it's actually liquid by taking this measurement. So when we hook up our gauges, we have a pressure, our saturation pressure right and our psi, and that, based on that psi, it gives us our our saturation. And then we take a measurement on the line to see if we're actually below or above that - and we know if we've reached liquid if our liquid line comes out liquid, it's usually close to outdoor temperature, maybe about seven ten degrees above outdoor temperature, and it comes Into the air handler into our metering device, what type of metering device is this the orifice? She was absolutely right: yeah and oftentimes, we'll call it a piston, and so what other types of metering devices do you run into, or even on some refrigeration applications? You'll have just uh smaller capillary tubes.

The tubes will just be small enough to be the restriction yeah and that's the exact same as this. It's a fixed metering device at that point uh. You want to go ahead and open the rest of this, so we can get the coil view at least everyone's getting some something on, not that you don't touch this stuff every day already you've been opening that and cleaning out the drain pans right. Okay, the first thing i do is check the filter and i reach in uh-huh someone the other day, all right.

That was okay, so we already established what does the evaporator? Do it evaporates? What just what he said, the liquid refrigerant, if you don't have liquid refrigerant coming in you're, not going to be able to evaporate the refrigerant you're, not going to be able to create low pressure, low temperature saturation through this coil. So the refrigerant comes into the coil. On the liquid, it's restricted, which causes your pressure drop and immediately that refrigerant, under with an extreme re pressure, drop, reaches the uh, a pressure that will start boiling. So you have lower pressure on the other side of that pressure drop and that refrigerant will immediately start flashing and boiling it'll come through these tubes and then hit the rest of the coil and expand even more and because an expansion is is low.

Pressure you're creating low pressure, so the molecules that were really tight, high heat friction now they're allowed to relax they're, not rubbing each other, there's not as much friction, there's more space for them and so you're reading a lower pressure on this side of your system. With your gauge outside and that that low pressure is why you have low temperature, but also because it's going from a liquid and it's boiling into a vapor, we all we have saturation inside this coil right and that process of saturation. I lost my train of thought: where was i yeah? So let's go. Let's start, let's go in here so as the coil, it comes in really cold, still mostly liquid and it's starting to boil right and then what is the job of this evaporator coil in relation to what we're trying to accomplish with air conditioning absorbs the heat which Generates colder air coming out of the top, so the air comes in warm.

The evaporator absorbs as much heat as it can, because it's much colder than the air temperature and comes out colder exactly so that energy that's being absorbed is going into that refrigerant and it is causing that refrigerant to continue boiling, as the heat is entering that refrigerant. That energy is being used to finish the boiling process inside there so same thing with the condenser when it's in a saturated state it doesn't change temperature until it's finished and become fully either fully vapor or fully liquid. It doesn't change temperature, so you can have a coil, that's 42 degrees in saturation all the heat coming into it. It stays 42 degrees until it's fully boiled.

So all that heat energy - that's going in, is being used to boil not actually being used to change the temperature it's being used up in the boiling process once the refrigerant becomes fully vapor, it starts raising in heat, and we call that superheat exactly superheat is the Measurement that how far above saturation we've come, how far above that boiling have we come if it's still boiling it's going to be exact temperature, it's not going to raise in temperature until it's finished. So if we hook up our pressures - and we see that we have a 42 degree saturation - we know our coil is 42 degrees until it becomes fully vapor, then we take a measurement on our suction line and we see like this is 52 degrees. So we've we know, we've picked up 10 degrees of heat after we've become fully vapor, then we've raised in temperature, so it proves us that we're fully vapor coming out of the suction line, and then that takes us back to where we started. What happens to this vapor that's 52 degrees, and even though the temperature is 52 degrees, it's loaded with heat, it's absorbed lots of heat through this whole process.

It's loaded with heat, it's still low pressure. It's not high friction, so that heats in there. It's just waiting for something to smash it, so it actually becomes high temperature and you can get rid of the heat outside in the outside air. So, okay, so, let's hook up to a real system, pressures temperature clamps and just hit this really quick again with live readings.

What okay, all right, all right, yep liquid valve all right! Mate yeah, like i said those can be a little awkward just find yourself. A really good angle, and then you know you can go fast and yep this that way: oh you're, just threading it in okay, all right, somebody shine on the on the gauge. What do we have on our gauge? All right, you are successful. You are successful.

You see how that didn't, hiss or or give you any refrigerant, that is a low loss valve, and that is essential for gauge safety. Some version of that that one's the yellow jacket, which i like you're, dealing with less pressure but still a dangerous amount of pressure on your suction, but it's vapor. So if you are dumping, it you're not going to have the freeze effect that you do on liquid. Okay, so who's got temperature, clamps, hey we'll, go ahead and hook the temperature clamps up inside just for ease.

Let's do that? Okay, no we're not! Please get them hook them up inside turn. Them on. Okay, chad's gon na go hook up the clamps inside and we're going to check them out wirelessly anybody you want to look at. What's that, it's going to be real grainy all right.

So as we look at our pressures, tell me what refrigerant that we're working on! That's going to be important. Your data, tag's, probably on the other and corner, looks like it rubbed off right here, hey! Look at that! The dash tags peeled off it's more than likely. Okay, so we're working with fortune a we can tell by our pressures yeah and the should be a safety tag on the inside yep on that tag, only fortunately only okay. So what uh? What psi do we got somebody on our suction line? So this is our vapor low temperature, 105, 105.

Okay. So what saturation is 105. for fortune, a refrigerant? It's what we're dealing with? Fortunately, 35 yeah 32. yeah, it's probably 32.

yep and 32 degrees, yep, so 32 degrees of saturation. So that means our coil on. The suction line is currently experiencing a pressure of 105, which puts our saturation temperature at 32 degrees, if you're, if you're warmer than 32 degrees, that refrigerant is going to be vapor if you're at 32 degrees. It's going to be saturation.

It's going to still have liquid. In it, it's going to still be boiling, so if a temperature clamp shows 32 degrees coming off of that evaporator, we know we are at zero there. It is all right, he pulled it up on the app. So what do we got on our temperature for the suction? That's pretty extreme! That's pretty extreme! Okay! So somebody give me my superheat superheat is the measurement of how far above saturation as our has our temperature gone.

37. That's really high! This thing is not running very well. It sounds like we need to have a diagnostic here, someday yep, all right. Let's get our sub cool, then so, what's our what's our head pressure, 270 around 270, maybe 265., and what is our saturation 89 degrees saturation so based on the pressure we have on that line, if our temperature is 89 degrees, we're still going to be in saturation.

If our temperature has gone below 89, we're going to be fully liquid because you remember it does not change in temperature during saturation, not until it's fully become a different state, not until it's fully become. If it's on the condensing side full liquid, then it changes temperature. So, what's our liquid line temperature, three five, so we have no, so you can see that 85 yeah everybody see 85 on the liquid line temperature. So this is giving us the actual temperature of our refrigerant, and this is giving us the saturation that this pressure is so inside the coil.

This thing is 89 degrees. By the time it comes out of the coil 85 um almost 86.. What's our sub cool four? Okay, if it's 85, it's four, it's 85.5! So we're going to go 3.5 yeah, so pretty low sub cool 3.5 and a high superheat anybody know anybody know what low sub cool high superheat means low. Refrigerant.

All right guys nailed this significant: okay, very nice, okay yeah! Let's throw let's throw on a txb tonight and just see what happens: okay, so discharge lines coming straight out of the compressor, that's going to be the hottest point right coming straight out of there right after it was smashed review. What what substance is the refrigerant? What state exposure vapor on the discharge line discharge line, vapor that comes straight out of the compressor it's gon na be high temperature. Does anybody know what too high is at? What point is that temperature too high for the health of our compressor and our system above 130? Anything above 225. Anything above 225 will actually start breaking down the oils in the system so that your oil will become acidic and no longer be able to lubricate your compressor.

So those kind of situations can be easily found on a rooftop unit or if you have a dirty, condenser coil or you have a fan, that's not actually moving well or maybe the fan set too low in there. So not enough air is coming out, you're, not releasing the heat from that discharge line, and so that heats that temperature is going to keep rising and rising and rising you. You run it over 225, sustained and you're going to break down your oil. So you.