Cool beans - actually i'm going to tilt this towards me, so i can see what questions people are asking um if any um, so i just thought it would be cool uh at the beginning of every class. We do this sort of uh review of what you guys have worked on this this uh last few days since we had our last class and then just talk about anything. That's on your mind and we'll kind of review a little bit of what we've already covered and what we're going to be covering today um from time to time. I think it would be it's just cool to let other people in and also any of you in the live stream want to uh.

Ask any questions or comment. You can feel free to do that i'll share it with the class as well so um just to kind of follow up first, because not all of you have been able to make every every class um we've been covering a lot of different things. We've already gone over. Obviously we did flaring swedging just some basics there.

I i really like to focus on using tools uh in combination with learning theory. So that way we don't get too terribly bored. We've covered a little bit about the basic refrigerant circuit. We've covered a little bit about basics of the movement of heat, heat and temperature.

A little bit we covered and today we're going to do a couple different things: we're going to do a quick review, but then we're also going to talk a little bit about saturation, because that's a term that's often misunderstood and a little bit more on the the Basic science, so those of you who have your books we're going to be going over refrigeration, air conditioning technology in that first chapter, where it talks about the movement of heat. We'll do a little bit of that and then we'll actually do some connecting to some equipment and make some interpretations on on what we're uh. What we're seeing in the equipment, because we already did that a little bit in the basic refrigerant circuit last week. So we're going to follow up on that and then we're also going to do a little bit on a ductless system more just on the practice side.

Um sam is here uh and he's gon na test out a new product uh that that we just recently got it's a it's a new type of boob kit and we're going to test that out. But in the process we'll also kind of go over the proper cleaning of ductless system heads and blower wheels and talk a little bit about that today. So we're going to going to do some different things. But let's just let's just start, go around talk about what you've been working on this week.

Anything interesting come up. We'll start with you jessica um. I was at a first year maintenance new new system and found oil on the cork tape on the liquid line. Okay, um bubble tested, found a small leak.

I was able to locate it nice and this was on the inside or the outside inside inside and so underneath the so you pull the cork tape back uh, and so it's actually the solder joint okay. So it's a newer unit yeah. So, okay, so like a just a warranty, just a just a poor connection, yeah um any theories on why it was uh leaking particularly uh. It was just a mistake, not the best quality, okay yeah, that's a diplomatic way of saying it um and what we find often - and we talked about this - a couple classes back too, and obviously we're not even at that part yet.

But we just we kind of keep jumping ahead and then dialing. It back is especially in residential, a lot of residential technicians get away with not getting the joints hot enough, because in residential, the connections that we're making aren't nearly as stressed as in other parts of the industry, and so we kind of get away with making these Connections that maybe we never got hot enough in the first place - and it's important for us to get that entire joint uh hot enough that the solder or alloy was saying it pulls into that joint. It's also helpful to use better quality alloys because those flow better and are also more ductile, so they don't crack as easily. But often it's just not getting it hot enough that whoever's doing the brazing is afraid of burning up a valve, they're afraid of doing the wrong thing, and that's that's good, but often it's uh.

It's it's just a matter of just not getting it hot enough. I've already seen my first mass complaint. If you would like to complain about masks ever on my channel. Please leave before i block you, because the reality is that i don't have a choice here.

This is a government school, so i have rules that i have to abide by and if you want to hassle me just please leave um, just i'm so i'm so over it right now like when you run a business uh with 200 employees, then try uh criticizing. I'm just so over it. Okay, a little emotional there we're going to move on uh, so good, one good one, so elite planet found a leak bubble. Testing is so big.

I see so many people who um they go right to the electronic leak detector and if you've got oil start with bubbles, always start with bubbles, matthew um, i did an install on friday, so that was my first time doing an install on knowing on the service Technician side, so that was really cool to see the install process of pulling all the unit out doing a whole swatch uh. You know change out rebuilding platforms, doing um. You know hooking up the condenser. We had to run new 240 up the attic to almost a 40 40 foot.

So why did? Why did we after a new wire because there's a furnace okay? So we so we converted a furnace to uh, maybe that okay yeah, so we have it on 1840 um. So that was pretty fun to see the whole process and be a part of that yeah yeah. We do a lot of conversions and a lot of people. Um, who are in heavy furnace markets um they they like gas, because in those markets you you like the greater capacity because obviously gets a lot colder in florida, though heat pumps are great, and especially in central florida market, because it gets cold enough here that we Do need heat sometimes, but they are more efficient and then uh, there's just the advantage of not having to worry about the safety issues with gas as well.

No again so a lot of people gas has been used safely throughout the country for a really long time. But, of course, the challenge in florida is that you don't have a lot of people who know how to work on gas properly. You know and that's the reason why, whenever we do a new system installation when we're doing a gas furnace, we send max out with the combustion analyzer to do a full commissioning, because it just terrifies me and frankly, this is one of these examples where uh the Way that i did it for the first 15 years of my career now terrifies me to the extent that uh, i'm almost a little wary of gas, because we've just seen so many issues, we've seen gas leaks left we've seen you know, people leave the ports out After doing testing on the gas valves and a lot of that stuff is pretty pretty scary once you realize what it can do, um so yeah take take gas really seriously but yeah. It's those are cool jobs when we do those conversions from gas to uh, to heat pumps.

Anything else, particularly that you learned from like a practices, standpoint or anything you saw or got to do, that was a little different, um actually like wire up the condenser. So i haven't had to do that so to be able to see where all those go and then actually help me on a job today, um to diagnose uh dewalt lead into the diagnosis process of a failed uh. High pressure switch okay. So to see where white can come in to the board and then where it all leads, so we've got to do all that on the install so interesting, yeah well, not not ideal, but um.

You know good um yeah and that's that's something. We've talked about before. In terms of diagnosing boards or any sort of control, good technicians don't jump to the thing they don't understand and say: oh the board's bad. They look at everything else, that's connected to it to see.

If it's something else a lot of times, you see boards get condemned because of failed pressure, switches or because of you know, wiring problems. Things like that. So it's good that you went through that entire process cool chad, anything crazy, you've been doing lots of crazy stuff. So so chad is actually working in grocery stores now and he's kind of gotten thrown to the wolves um, but kudos to you lots of good uh reports.

I got to uh talk to all of your uh all of your teammates today in the in the grocery division, and they were saying you're doing great, so anyway go ahead. Uh no monday, monday morning, like 3 15, i got a call for security. One. The whole rack was down for the frozen foods on high section and all the compressors, except for one were like from high pressure lockout.

So you couldn't even do it one run and found one of the fans on the condenser. Rack were down okay, and it was weird because i guess it when it went out it backfed to the board which took that, because i had powered board but not to the fans. It was like it was really weird, but so what so? The fan was failed. In what way was it failed shorted? Was it failed open? You know, i just was just just woke: it just wasn't running okay and whenever rolando came out there to help out, but we had to get oh wait.

A second was this, the one that they had to get the refrigerated truck on it. Wasn't that one was it yes, okay, yeah! We don't want to air too much of our uh of our laundry here on the livestream um yeah. That was a that was an interesting one. Now one thing to one thing: to note: just a good thing to know: if you've ever got issues with large condensers, where um a condenser fan, motor or maybe even corrosion or something is causing a high head event that maybe is temporary or you're waiting to get A part you can take a sprinkler and put it on it.

You got a hose okay, yeah and that and that will you know that will uh do as good of a job, if not better, in some cases than a condenser your family. Now you don't want to run that i mean i've seen i've seen grocery stores where they've been running sprinklers on them for months and that's a really bad idea, because you're going to put deposits on the on the coils and they're not going to transfer heat. But in terms of sort of an emergency way of getting a piece of equipment up and running uh, those big slab condensers, just you know, put a bunch of water on run water on now again, there's certain markets that that is heresy, and you absolutely can't do That i'm sure some of our nevada and california people are, you, know screaming right now, but in our market again it's a temporary way to get something up and working because again in the grocery, you got two hours um you got two hours, otherwise you start losing Frozen product - and it gets really expensive - really quick, so yeah yeah two hours and that's and it's two hours from the time that you get the call not two hours from the time. You show up it's two hours from the time the rack goes down before you start losing frozen foods, yeah no bueno and that's the that's where refrigerated trucks come in, is that in some cases you got ta unload when you've got a whole rack down.

You get nowhere else to put it. If you got a case down or something, then you can put it into you know your walk-ins or something else yeah we replaced. The fan got enough of that: okay, yeah yeah! That's why there was a lot of discussion about that one in the uh in the old meeting today: cool um nick! Yes, i want to call you nicholas nicholas. Is the other one yeah anything interesting? Oh we're! We got a three-day job started it monday, uh.

I never ended up in the attic redoing the whole entire house, with new ducks and new supplies. New returns, reload their air handler. So defending an attic all day. Yeah you look, you look good, you look like you need a nap yeah and that's okay.

You know. Yeah well we're trying to hustle, because you know just we're down two guys, so it's kind of are you putting it in the garage? Are you putting it in the air? It's in the attic attic units are are tough and, like we talked about anytime you're, installing unit horizontal pay extra attention to condensate pay. Extra attention to the installation manual will make sure that everything is configured the way it's supposed to, because we get a lot of issues with and again in addicts. This is something that that gets missed.

Uh, quite often anyway, is that the dew point in attics can be extremely high, so you're going to have more unit sweating problems in attics than pretty much anywhere, and sometimes there's not really great solutions to it other than trying to keep your airflow up so that Your cabinet doesn't get too uh too cold, but those are all all things to all things you look at, but yeah long day sounds like it's been hustling i mean it was pretty it's pretty good yeah i mean the attic space is workable. You know so you're not really, but the house is pretty weird shape. I mean i don't know how to explain it, but it's just you know yeah. When i started kayla's, it seems like every job i did was some sort of horrible application and later on, i i think the reason that that was is because i didn't have any any reputation and i was too cheap and so the i would just get all The crap jobs that nobody else wanted were pricing too high is a lot of like uh historic homes and stuff in in the old section of claremont, and it was all just garbage yeah one of um.

There's one house that nathan, my brother, who now is chad's manager uh, did early on that like we started it at like eight in the morning and we went until like three just trying it's just every time i drive by that place. It just haunts me so you have to admit, though this house is gon na, be nice once it's done yeah. It makes a big difference if you that'd, be really nice. Yeah yeah cool, mario um, curious about a couple things.

I was wondering about my manifold. One of the pins came out and i'm wondering instead of buying a new clamp set. If i should just you know, go with the bluetooth, you know one of the pins came out. What do you mean the pins, the in the back? One of the okay? You know where you plug the into the back of the manifold okay.

It just broke stayed in when i unplugged it, so it's separated so that that one's no good okay, so i could just get a new. You know what type of manifold was it? It's a field piece: 380., okay, um. If it's the yeah, if it's the sm-380v um, that's a pretty new manifold yeah. If it's only a year old, i would give a field piece.

You know this is what i always suggest is that if you ever have anything that breaks, that's you know, newish just get with the manufacturer, shoot him an email, um contact him on social media whatever and just say, hey here's. What happened! Send them a picture. Um contact warranty, you know you don't want to spend a bunch of money for no reason if it's something that shouldn't have shouldn't have happened. So we you know, we say this all the time uh in the in the residential meetings.

It's like you know. You got a tool that breaks me communicate with the manufacturer, they don't mind, so i would suggest doing that first before you do anything else, because that's a good manifold all right, abraham uh. I had many interesting things. Oh many interesting things all right today, starting yesterday.

I had this call where uh we had a global city right, so i started troubleshooting the equipment and i found the you know: there's they have a contactor for the for the condenser and another contactor for the blower and uh. So they put the low voltage and the wrong one. So let's say like the the grain that goes to the front of the blower was going into the condenser, oh okay, right so because yeah, because you have two control wires yeah. This is actually so.

Let's pause here, this is a really good so again to the uh to the audience online. Two things uh, there's a very this is a very mixed group. You have some people who are in the field. You have some people who are writing.

Everyone is working in some degree in the field already, but some are on their own, some aren't, and so, when i cover things, i cover them. You know soup, to nuts to make sure that everybody's being brought along and then also with the mask thing. I'm in a public school i have to wear a mask. I have no choice.

If you don't want to watch, you don't have to thank you. Okay. Here we go again um g wire. So when you have a split system, you've got one uh conductor, one one cable, that's going inside to your thermostat.

You have one that's going outside to the condenser. The one going to the condenser doesn't need a g wire because the condenser doesn't have a blower in it. The g wire is specifically for your blower call and in fact um back in the day when you had uh heat, only furnaces, which this is you know obviously, a long time ago, you didn't always used to need a g wire, the it used to be that The furnace board would control g and so g is kind of a it's a little bit of a newer thing like it's one of the newer conductors in the in the world of uh of controls, because back in the day, it was all done by that by That furnace board um, and so again you don't need that g going to the condenser, but when you bring those wires into the air handler and you're wiring it up the first time a lot of times, they'll get those two confused and they won't hook up. The g wire um, or they won't hook up the g wire or go to the thermostat they'll hook it up going to the condenser and in some systems that will cause your blower not to run right.

But in some systems the blower will still run, and why is that? Sam talk loud? So people can hear you, because the? Why call on certain boards will turn on, because the y call on certain boards will turn on the blower motor. But it will turn it on into super dehumidifier mode and that's a carrier term, and i don't know that all brands do this. But if you have a y call without a g call sometimes on some equipment your blower will run, but it will just run slow. So that's something to always check for if you've got a blower.

That seems like it's running too slow. You want to check. Obviously, if it's wired up for the humidification, you want to check to make sure you've got your call there to make sure it's not dehumidify mode. And then you also want to check and make sure that you've got to call on g.

And if you don't have a call on g, then look for exactly what you're saying. Maybe they hooked up the wrong g wire? Maybe they hooked up the one going to the condenser rather than the one going to the thermostat. They have the y and the d wire they just mixed it up, yeah. It just makes it yeah.

That was one thing, and they also had this uh relay with one of those relays with the boards. So that was the problem because it was clicking like you know, i was trying to call, but it was just it wasn't working, so that was still crowned in that unit that really, okay, because i just followed the power until there was no more power on the Other side, so i had that relay doing that and the contactors, where they switched to the logo. Okay, so on that relay, i would want to understand what that relay. Does what what's the purpose of that relay? You know uh yeah for the time for the blower or for the connector for the blower okay, and so you had 24 volts applied to the coil yeah, but the contacts weren't consistently making is that what you're? Saying? Okay? Okay, okay, all right! So we're maybe going a little too far here but yeah, let's um, that's one that if we can find a wiring diagram or something for that unit um.

It would be good to look over that and see exactly what you were seeing um, because you will go through a circuit, especially if you're on the low voltage side once you get past, if you're just kind of walking through it. Once you get past the coil on the on that relay, you will lose once you get on the common side of the circuit. You will stop seeing so it kind of depends on what you mean there, but um, but you replaced it and then it worked or what was the final fact. We have to order from factory and we haven't put it in yet: okay, okay, um yeah! You may find that that's not what's wrong! Well, yeah, even because i didn't do it myself.

I tried to find the problem before ryan got there. Okay, so ryan came out so right now, okay, all right all! Right! Thanks! Okay yeah! If, okay, that's fine, if ryan came out, i i feel like yeah, yeah, okay got it um. So one thing to always look for, though, when you have any sort of um. This is a commercial unit.

I i assume right yeah. Yes, it's a state of pocket. Two-Stage packaging: okay: on commercial equipment, when you're in a commercial building, you always want to check how the transformer is tapped like we talked about. If that transformer is tapped for 240 and you have 208 or 230 and you have 208, then that can cause you to have lower than designed voltage and you have lower than design voltage.

It can cause relays to chatter, because that coil, if you drop the high voltage going into the transformer, you also drop the low voltage coming out of the transformer right, and so, if you have it wired for 240 and you're, only giving it 208. That means that you're not necessarily going to have 24 coming out either always something to watch for in a commercial cool. I think is it sam anything interesting for you, you've been doing some interesting stuff. If you're going to talk, you need to either talk really loud or you need to walk closer, because otherwise the poor people on the youtubes aren't going to hear you no no interesting stuff.

Nothing. I had a uh tech called me today. Heat strips were running with uh that'll. Do that now? Is that actually a short here's? The question is that a short? So that's always that's always the thing, because when we say short, a lot of people will say well, a short is a circuit that results in high current blowing a fuse tripping a breaker, but in this case it's a short between two switch legs.

So they're both switch legs that are both towering different loads. So there are things that are connected. That shouldn't be connected. Is that a short i've always called it a short, but that's actually one of those disputed things.

If it's not called a short, i don't know what it's called: it's not a long, that's a good one, but yeah. If you have, if you have two conductors that are connected to each other touching each other, that should not be touching each other, then you have to talk to hr first, because that is against company policy. Sorry, sorry, i'm on i'm on a roll here now. It's all the people complaining about masks that we all fired up and i i don't know i don't know what to do all right.

Good, all right. So that's, that's! It um we're going to go uh we're going to talk about saturation other things, but i'm going to let you all go uh. All of you who are here on the live stream. I know the audio is not great, given the device we're using here we're going to do some more videos from the classroom, which will have better audio, but i just wanted to kind of give you a look at how we start these classes um.

I think these little initial sessions are good, even though they're kind of all over the place, it just gives us a chance to talk through some real things, we're seeing um and yes, i'm sorry that we have to wear masks, but unfortunately, that's the rules of the School, okay, i don't want to wear them either and i'm sorry that you have to look at me with a mask on because i know you, like the look of my beautiful face - see ya um.