Ah, it's time to chill out and get ready for a mediocre. Qa live stream if you're old enough grab yourself your favorite adult beverage and if you're not stick with apple juice, put your feet up and relax. If you have any questions, feel free to ask them in the chat and now, let's queue up the intro music, hey everybody. Hopefully, you guys are doing well, as usual got a couple things I want to cover definitely want to get to your guys's questions in the chat.

So do me a favor and if you guys do have questions throw them in caps lock that way we can try to get to them. I've been trying and it's difficult because oftentimes during their streams, there's over a thousand chat messages, so I've been trying to go through the chat messages to see what things I missed this week, I'm a little bit behind, so I wasn't able to do it, but I Was doing it last week too so, but anyways I'll try to go back if I miss anything, but don't hesitate to post everything again guys you're, not gon na piss me off, just put it in caps, lock and I'll. Tell you if I'm not gon na answer it. Okay, so just keep putting it in there.

If I don't answer it I'll, you know try to get my attention. Alright, I really appreciate it. Thank you very much for that super chat there. Mister Zack.

I appreciate it. I covered two or I had two videos since the last time. I did a stream. We did a bearing change on a Linux LGA package unit, the one with the two blower wheels and the big-ass shaft, and then we also did a carrier package unit that I released last night actually carrier package unit where I had another service tech out there.

Changing a he was doing a preventive maintenance, he found a burnt contactor, he changed it, but then it was short, cycling and anyways. I went out there to dig into that one. That was an interesting one. That's one of those things! You know that we want to make sure that we're being thorough and looking at the big picture, you know my little mantra that I'm always preaching to you know: try to figure out.

What's going on, don't just assume that it's a contactor and move on you know, obviously that one was pretty quick, so I got to see it pretty quick, but you know going through the the troubleshooting process to make sure that you know we figure out what it Is i isolated each pressure control and then, even after I, you know kind of figured, it was the high pressure control. I still hooked the high pressure control back up to get it to do the same thing again and then, once I was done installing the new pressure controls, you know, ran the unit and continued to diagnose. So again we don't just stop at the initial diagnosis. We look at everything now.

In my opinion, this unit was probably running some higher than normal head pressures during the summer. It was probably going off on high pressure and that's probably, what damaged the high pressure control. More than likely. It was running the high head pressures because someone overcharged it because the unit has a plug fixed, orifice metering device.

Okay. So it's things like that. You got to unravel everything all right, we're there to solve the problem, not the symptom right. So um, you know just big picture, that's what I'm always preaching and I'm not perfect.

I make mistakes, but you know I try to do my best to look at everything all right, um. You know I want to address too, with the Linux package unit, where I had the blower wheel, shaft, you know all that good stuff, I you know there's certainly better ways to do that and I knew I even said something in the video. You know people are probably gon na, say: hey do this, do that there's always a better way to do it? Okay, sometimes you have the tools that you have on you, but the one thing I will say I did get one or two comments from people asking me. You know why didn't I save the shaft? Why? Why did I change the blower wheels? Inevitably time is money? That's what it comes down to.

I could have spent an entire day that job changing everything that I did. I think I'd build out eight and a half hours. I think - and that was two technicians four and a quarter hours. Each, I think, is what it was, because we needed a second person to get the assembly out.

I could have stayed there longer. You know, I could have sure gotten the blower assemblies off, but what happens when I went through all of that and the blower one of the blower wheels was out of balance. Okay, because what can happen on high rpm units is the blower wheels can actually rebalance themselves. I've noticed this now.

People may say this isn't true, but I've noticed this if they get a lot of buildup on them. When you clean them, they'll be out of balance and it's just because they in my opinion, they run that way for so very long that, after time, when you go in there and clean it, you know, then you put it on. Then it's out of balance and then it's just a nightmare. Okay, we don't need a unit shaking off the roof, it's easier in my opinion and faster, in my opinion, just to go in there cut everything apart, put new blower wheel, new shaft everything was cheap enough.

Okay, I did the math to say: hey, you know what you know. How much is it gon na cost to do this job? If I didn't change all these parts, because all I needed to change was two bearings in all honesty, so I mean I guess. Theoretically, I only needed to change one bearing, but both of them were in pretty bad shape and I always changed bearings as a set whenever possible, so anyways, but I'm not upset. I mean I know everybody.

I asked for everybody's opinion when I do these videos. I appreciate your guys's comments and I try to respond to them as much as possible, but definitely share with me your guys's. You know methods of doing things when you see that I do something different say: hey, you know what I do it like this. This is how I run into it.

I'm always curious to hear how other people do. You know the same jobs that I do and stuff like that, so definitely see the chat. I see a lot of people here in the chat. Thank you guys, all for coming.

In here let me see if I'm missing anything if I'm missing anything, definitely repost and I'll try to get to it. So I'm going to start off on my little sheet right here. I also have a little clip. Thank you very much for the super chat.

I really really appreciate it. Let's go with Bill bill. You had asked me a question. It was an interesting question.

Bill is curious, HVAC guy, and he had asked me a question about head pressure, control valves. He sent me an email, you guys can all send me. Emails, if you guys, are curious about something. If you want me to talk about something HVAC our videos at gmail.com, you can put them in the YouTube chat.

You can put them in. You know all the different stuff and I'll try to get to them. Okay, email might be the best one. I mean YouTube.

Comments are great too, but emails. I tend to go through those a little bit more but anyways so bill had asked me about head pressure, control, valves, okay, so a head pressure control valve is a low ambient control. It's there to flood the condenser or they may call on the flooded yeah. It's there to flood the condenser to simulate a warmer day, okay, so think of it as blocking off the condenser coil, while it's running so that way, the head pressure is driven up to maintain a certain head pressure.

Now. The reason why we use head pressure control valves is to maintain a set pressure differential across an expansion valve. Okay, so think about a standard, txb or thermostatically-controlled expansion valve. Not a electronic valve, okay.

Think about a standard TXV. It has a sensing bulb. It opens and closes, but something in the valve never changes and that's the orifice inside the valve. Okay, so the orifice is always the same, but the you know the super heat spring can apply more pressure or less pressure and push the diaphragm up, and you know down throughout the valve, but the orifice inside the valve is always the same size.

Therefore, we need a certain pressure differential across that valve. We needed a certain amount of pressure difference between the inlet of the valve in the outlet of the valve for the valve to feed correctly. So we use a head pressure control valve in the system. Now Bill's question was about what happens when he had pressure control valve bypasses.

What does it do to the subcooling? Okay? So that's a really interesting question and it really kind of got me thinking about it bill. I am definitely gon na. Do some measurements, okay and he's talking about the sub cooling coming out of the receiver now something to think about. Remember we really don't use sub cooling as a charging metric on refrigeration systems that have expansion, valves, okay, because typically we're just clearing the sight, glass and we're looking for some sub cooling coming out of the condenser okay.

If we have a clear sight glass, then obviously we have sub cooling because you know duh, okay, sub cooling equals liquid refrigerant. So we need to make sure that we have some sub cooling, but usually we really don't pay too much attention unless that sub cooling number gets really high. Now yeah using sub cooling as an overcharging metric is a great idea. Okay, if you start seeing 30 40 degrees sub cooling, you got something going on.

Okay, because you definitely don't want anything over that, but we typically don't pay too much attention to sub coin. But Bill's question is just kind of like a theory one, you know, and it really has me thinking so I'm definitely gon na. Do some measurements myself to see stellar. Thank you very much for that super chat.

That's really awesome! You guys. I really appreciate those of you that in and I don't expect it from everybody, but I really really appreciate the super chats. It's very very awesome to see that you guys, you know, will give your hard-earned money to my live stream. I really appreciate it.

It does help me continue these streams, but it's definitely not needed okay, but thank you guys very much that have chosen to do that, alright, so about the sub cooling, so I'm gon na do some measurements on that bill. I definitely want to measure that myself. I really think that once the refrigerant like off the top of my head once the refrigerant, because you've got liquid refrigerant already in the receiver III, imagine your sub cooling is not going to really change too much, because you've got vapor pushing down on that liquid refrigerant Sitting and the receiver at all times, anyways when that head pressure, control valve is bypassing. So I imagine we're still gon na have you know somewhat lower sub cooling, but I would like to take a measurement myself just to kind of see, because it's not really gon na help me with anything.

But it definitely is an interesting question there bill. So you know, I don't know about increased sub cooling Matt, but you know we'll see I'm gon na measure it out and see see how it works. You know I'm kind of curious how it goes. I would imagine that being that the receiver is not really insulated.

At all, you know, I would imagine the subclones not gon na be very high, because even if the the vapor refrigerant was heating up that refrigerant inside the receiver, I would imagine that it's a you know radiating the temperature outside of the receiver pretty quickly because the Metal and the receivers not very high or not very thick, so it's not really an insulation Blake cut around the receiver, anyways we're getting super techie and weird right now. I will definitely take some measurements and try to either report back on the stream or maybe put it in a video clip or something like that and we'll go from there. Okay, let's see mark. Oh, please talk about how you confirm a bad compressor or one that's on the way out, there's a lot of different ways to confirm a bad compressor mark, oh okay.

First off, we need to understand completely how a compressor works. Okay, different types of compressors work differently. If we're working on Copeland compressors we're gon na use those ones as a guinea pig, because Copeland actually has a really cool app called the Copeland mobile app. That will help you to diagnose compressor problems.

Okay, so you can run numbers with the Copeland mobile app. You can input discharge and suction pressures, you can input amp draws and it will give you a essentially pass or failed number and a percentage and then tells you to look into the problem further. Okay, so different ways on old reciprocating compressors we were able to do valve tests on them. We were able to shut valves and pump them down and check to see if valve pressures held in different things like that, but on scroll compressors.

We really can't do that. So we definitely have to rely on the manufacturer's, publish data to help us diagnose, compressor issues. Okay, there's really a lot. I mean that can go in so many different ways bud.

So if, if you want to talk some more about it, definitely send me an email to HVAC our videos at gmail.com. Give me some some specifics and I can talk to you a little bit more about it. Okay, let's see what else Scott Savage, please explain. Supercooling! I imagine you're talking about subcooling.

I am NOT going to do that off the top of my head right now, because I want to make sure when you come to these technical terms that people ask me about. I understand superheat subcooling and all those different refrigeration practices, but sometimes, if I'm gon na be you know really talking about it. I definitely want to make sure that I'm giving you guys the specific incorrect terms. Okay, so that one I'm gon na have to think about.

For a little bit and then I'll come up with a proper diagnosis, I mean a proper explanation. That would make sense because sometimes what's in my head doesn't really come out of my mouth correctly. Okay, so let's keep going here. Let's see what he was! Aha, prime time, how come I don't cut out head masters when I change a compressor, you don't need it.

Prime time doesn't like head pressure, control valves. I know it. I know it, but no, we we don't really have too many problems with head pressure. Control valves here in Southern California, I've said it very much because we have a very mild climate, so we really don't see them bypassing too much.

We just see them. You know every once in a while, so I really don't have a lot of problems that the head pressure control valve, so I tend to leave them in. I have taken them out in the past in certain situations, but not something I usually do. I know you're just messing around prime time but okay, so, let's see what's going on here.

Okay, so that's a good one! Brandon Tharp any information about adding exhaust fan extensions to get away from the condenser. So that's definitely a very V AC rookie! Don't let me forget to answer that question I'll get to it. So that's definitely a very important thing: Brandon, okay, exhaust fans, a lot of times. We have exhaust fans that the building engineers building designers didn't really think out too straight when they set them right.

Next to an air conditioning condenser, I have some videos on them where we have condensers they get covered in grease depending on what type. If you have high velocity fans, it might get the out of the Fannin and it throws it all over the roof. On two different things: okay, so sometimes we will add hood scoops extensions, different things like that to try to get the grease out of a certain area or in another direction. Just remember that you know you're gon na push that grease into another place and in all honesty, if they're throwing grease out of the exhaust fans, they really need to figure something out, because, though, the way that hood systems are supposed to be designed as the grease Is supposed to stop at the hood filter? So if it's not stopping at the hood filters, you know there's something going on there there and I see it.

It does happen. We see really high velocity systems where they do throw grease all over the roof. It's not right, but it does happen so yeah. You can definitely add hood extensions, but you would definitely want to lean on the manufacturer, because adding a hood extension is going to add static pressure to the system and you know, depending on how many bins are different.

Intricate, you know moves you make with that duct work or that hood extension. It could be a problem, so you want to be very careful about just just making something. Okay, you definitely want to follow proper practices and, like I said, talk to the manufacturer and see what they want to say. But that is a valid thing to do.

We do often add a hood extension whether it be extending the hood vent. You know the discharge vent or whatever up you know two three feet or moving it over to another angle, to get it to a different area. That does happen, and it is a common thing. Even the manufacturers usually will sell you a whole extension with their exhaust fan.

So let me see what else we got in here. Okay, so I definitely want to ask the HVAC rookie: can a head master fail partially open? Yes, a head master can fail partially open and what I'm gon na do gosh darn it. I have a head master, that's cut apart sitting in my van right now. Excuse me, I would show it right now, but in a head pressure, control valve or a head master, okay, just so that you guys know we oftentimes people will call a head pressure.

Control valve a headmaster. Headmaster is actually alko's trade name. I believe alko used to make a lot of valves there now a Mersenne valve. I don't know if they call it a head master anymore.

I don't even know if they make them anymore, but anyways alko used to make head pressure head masters and spoilin just calls him head pressure, control valves, so anyways same thing: okay, but on a head pressure control valve. Yes, they can fail partially open. Okay, there's a very small little opening inside a head pressure, control valve and something can get stuck inside of there and if it gets stuck inside there, the the the seat in the valve might not close all the way and you be allowed to partially bypass refrigerant. Through the valve, at all times, typically, when you have a stuck head pressure control valve, if it's the summertime you'll, definitely be going off on high head pressure, you'll be able to grab the valve the easiest way to diagnose head pressure.

Control valves is with your hands. Okay, grab discharge line very carefully, grab liquid line and grab liquid drain and compare the temperatures. If you know the way that the valve operates, you'll be able to understand, hey this one shouldn't be, you know it shouldn't be hot, going into the receiver right now. It should be the same temperature as the liquid drain, and you know you'll you'll be able to tell really quick, but yes, they can fail partially open, they could fail completely closed or they can fail completely open.

It just depends. Okay, in my opinion, the biggest problems that we have with head pressure control valves here in Southern California - is improper installation or improper piping piping practices or whatever you want to call. It brazing different things like that when the systems are installed and then you tend to have things floating around in the system and eventually it makes its way to the head pressure control valve and every once in a while. It can get stuck in there and cause some problems with them.

Okay, but you know I'm not saying that head pressure, control valves, don't ever fail on their own; they definitely do they can lose the the dome charge. You know all kinds of different things can happen. So let me see what else all right, I'm gon na, go ahead and go to my list here. Make sure you throw your questions in caps lock.

It really helps me to make sure that we we get to them. Okay, so something I want to talk about. Yeah, this is a funny one. Someone had made a comment in my Lennox video, so I am very hard on my tools.

Okay - and someone made a funny comment that made me laugh about you know when I was, I think I was put in a keyway or doing something on that Linux blower assembly, when I was changing the blower wheels, and I took my allen wrench or something like That and I used it as a hammer and I tapped on something I use almost everything in my tool: bag as a hammer. Okay, the only thing I've used my drill before as a hammer. I have used the battery on the bottom boom bang down on something. I use all my Crescent wrenches, that's why I don't keep kinetics pliers and I tip it cuz.

I don't want to buy expensive pliers because most of my tools, they have to last through me beating the crap out of them. Okay, I'm not gon na take my field piece meter and bang on something, but you know I guess I wouldn't put it past me to maybe tap on something with the field piece meter, I'm not gon na expect. You know the field piece meter or my drill to hammer something like a nail in, but I mean if I just need to tap something in, I just grab whatever. But with that being said, you know I only will buy certain tools because if I don't think that they're gon na last with you know in I'm being a little sarcastic about my meter, but I mean using a crescent wrench or something like that.

You know tapping on something with it. You know, I don't like buying really fragile fancy tools, expensive tools, especially because I usually beat the crap out of them. You know channellocks different things like that, and I also impatient careful too, though, like for instance, you know, I I learned really quickly on a set of channel locks and a set of Crescent wrenches or adjustable wrenches to not hit on the little knob that you move, Because then the wrench is useless. Okay, so I'll usually use the correct part that I can beat on something.

But just you know just one of those funny things that I do, and I makes me laugh when I see those comments about that. So, okay HVAC our vlog or that's Ernesto. He asked me if I think that social media is making the trade more appealing to the younger generation coming up yeah. Definitely I definitely say that social media is helping.

I think that YouTube helps a little bit, and I know that because I see it in the comments of my videos, you know a lot of the people making comments on. My videos are people in trade, school and they're like wow. I stumbled across this. That's really cool and then I usually direct them and tell them like hey, there's so many other people making videos, okay, but social media for sure.

I'm really not a fan in not judging anybody else, but I'm not a fan of. I don't really see a lot of use in Instagram. First of all you know like, but I guess I shouldn't say that I mean Instagram is a cool place to chill out and talk about different things. I just don't know if there's a lot of education on Instagram, but I know I guess that's probably not a correct statement.

I think there's some people on there educating you know but yeah. I definitely think the social media is making the trade more appealing for younger people. Sure I don't think it's enough. I think that we need still need more help.

I think where we need to start is on the high school level. I think that we need to start recruiting from high schools something I've been talking about for a very long time and wanted to do myself. I just haven't had the time to do. It is go to the local hight schools talk to the school districts.

Talk to the you know, the the teachers that talk about careers and different things like that and be able to go in front of the students and talk to them there, because I think we need to grab some students before they're shipped away to these fancy colleges And get them into the trade because we need something or trades in general. I think, but social media is definitely helping. Social media can also be bad too, because people see some crappy people making videos or different things like that, and you know again, I'm not trying to judge different people, but I'm just gon na stop talking about that all right Aldo! You asked me if I install walk-in coolers from the ground up. No, I don't do any new installations, I'm a the only kind of installations I do is typically retrofits.

I don't do any new construction or walk in replacements. I'll tell them to get a construction company out there to do the walk-in, and then I don't mind putting the refrigeration equipment in it, but I've just never wanted to really get involved in doing walkins. There's too many things that can go wrong. There also can be really easy money.

I do understand that, but I've seen walk-in installations go really bad and cost people a lot of money. So I'd rather not be the responsible party. What I've seen is I've seen where I've done refrigeration equipment, but another contractor did the walk and installation and they installed everything. The restaurant had started up fire sprinklers, alarms, plumbing everything was done and they realized that they didn't install the walk-in on a level surface and they had massive air leakage and no joke that contractor ended up filing bankruptcy.

So it's things like that. There's a lot of mistakes that can be made, and I just leave that to a construction company to do that stuff. So just my personal preference, let's see what else who do? I watch Scott Savage there's a lot of people that I watch on YouTube. What you can do is you can go to my YouTube page and youtube.com, slash, HVAC our videos and there's a little link on there called channels.

You can click on that and you can other channels. I subscribe to you now. The one thing I will be careful to tell you is that sometimes I subscribe to people that aren't the greatest people either, just because I like to chuckle and watch their videos, but so just be cautious about what you don't just assume that just because I subscribe To them that the best person in the world but yeah you can go to HVAC our videos, calm, our HVAC youtube-dot-com, forward-slash, HVAC, our videos and then click on the channels link, and you can see all the different people that I subscribe to. So let me see.

Alright, so another thing i want to talk about is i'm going through my list right now: okay, cool we're good right there. So i want to talk about mentally preparing for the job, okay, so mentally preparing for our jobs being ready when we go to the jobs as much as possible. Now, there's a way. There's a you know: you can overthink jobs too, for instance, when i'm going to a service call.

I don't have an apprentice riding with me right now, but in the past I've had an apprentice riding with me. You know in the whole way there he's asked me: what do you think could be wrong? What about this? What about that? You know when I'm going to just a general service call, there's really not much thinking in my mind unless I have a lot of details about the job, but when I'm going to do installations or compressor, replacements and stuff, like that, I try to think about the Job I try to make it more efficient. I'm sure you guys see that in my videos I try to be as efficient as possible when I'm doing things - and you know I've said this before, but I always try to think of the worst thing that can happen. So that way I can be prepared for it.

One of the really really big tips that I would give to anybody. That's in the trade is one of the most important safety things that you can do is to learn how not to react, and what I mean by that is when and if something bad happens, because it is gon na happen, there is gon na be stuff. That goes wrong when you're working, we work in a dangerous environment, so stuff happens. Ok when and if it does happen, you have to learn when it's correct to react and when it's correct not to react and I'm gon na give you an example.

I think I've said this before on the stream before, but it's really important, you know I'm gon na I'm gon na tell you one time. This was a long time ago my dad was brazing on a piece of pipe. This is when I was younger and I remember him coming home from work and not good. He was brazen on a piece of pipe on a vertical okay, so it was a vertical piece of pipe and he didn't support the bottom of the 90 and while he was braising, the pipe the pipe slid out and dropped and his instinct was to grab that Pipe, he grabbed it with the palm of his hand and he got horrible burns on the inside of his hands.

That's an example of a time when you have to learn how not to react it's very hard, because your instincts tell you to Oh something's falling grab. It you know same thing: I'm gon na give you an example working on a carrier package unit, okay and I'm trying to put my service gauges on a 10-ton carrier package unit. Well, you have to pull the panel off the condenser fan motors are right there at your face and you've got to screw your manifold gauge set on there, and maybe you can't shut off the unit. Well, your ought.

Your your movie you're, working with your hand about four inches away from the condenser fan motor blade. That's spinning, quite fast, okay. So what happens if, while you're screwing that on something drops a loud noise happens, the compressor starts up. Someone drops something behind you and you get scared and you Jam your ham up hand up into the condenser fan motor.

That's an instance where I say that you have to learn how not to react. It does take time to get to that because at the same time you have to know when to react to you know, for instance, if something's gon na fall on you, you have to know when to jump out of the way, but that's a very important thing And that will come, you know for you newer guys that will come with experience. You'll learn how to do that, but it's very important to understand when not to react. So that way, you don't hurt yourself.

Okay, you know understand that if you in a perfect world, you cut a compressor out every single time. You change it, but we don't live in a perfect world there's many times where I have to unbrace a compressor. So there's no refrigerant left in it. The ports are open, you got to heat it up and you got to pull the suction line off.

While it's hot and different things, it's pretty much guaranteed that when you're under easing the compressor, you're gon na get a flame out and what a flame out is is when the oil inside the compressor, ignites, okay and it will shoot I've seen them shoot quite a Ways sometimes, depending on how big the system is in, if there's even the slightest bit of pressure still in the system that oil once it ignites will shoot even farther okay things like that. That's why, when you're, you know you follow your proper safety practices practices. You wear your PPE, all the protective crap right. You have a fire extinguisher with you.

You have a wet towel. You have a water hose. You have something there to help you when you're brazing, okay, things like that learning, how not to react, but then also expecting certain things that are gon na happen. So whenever I'm unbraced and compressor, I'm always ready like this compressor is gon na flame out.

I have a feeling it is be prepared. Okay, you can move wires away from the area. You can make sure that there's nothing that's flammable in the area. Things like that.

Okay, so you got to be cautious because you want to go home at night. Now. I don't know the circumstances, but there's a very very I don't. I don't want to confirm the person's name because I just saw it on social media.

I don't know if it's completely true, but there's a couple different people on social media talking about a really big Instagrammer, that is an HVAC Instagrammer that passed away. Okay, they were talking about it on Instagram. Today I haven't gotten confirmation, but who knows how he passed away, what the circumstances are behind it, but it's really important that we go home at nighttime, okay, you know we do work in a dangerous job and there's elements of it that can be very dangerous. Climbing ladders different things like that, we need to take our time.

We need to make sure we're being careful, because we need to go home at nighttime. Okay, all right, let's see what else we got hmm. How does a so Carlos Cervantes ask me: how does the thermostat work with a control board that has terminals GC and gh, saw it in an old pain? That's an interesting that sounds like a I'm not too familiar with the old pain board, but I don't know what the GC and the GH mean. I'd have to look at a schematic.

So let me see what else what if I miss something guys throw it in here, so what ever happened to my helper Ernesto, so the guy that was working with me. Unfortunately, I had to let him go. He was a great great helper. He was doing really well, but he had some personal things going on and it just wasn't working out, but he didn't do anything wrong with our company.

He didn't do anything wrong while he was working on the job is something that happened in his personal life and we just couldn't keep him employed with us. So it's very unfortunate, but you it's just one of those things. That's what happens often times as a business owner. That's a very frustrating thing when, when people, when you have employee turnover people leave people come that's something you have to get used to, but it also hurts every single time you know so because I I had an apprentice working with me and essentially, when you look At it from a business side, I made a commitment to have him work with me and I wasn't gon na make a dime off of him, because essentially I was paying him every day to come to work, and I wasn't billing for him right.

Don't get me wrong, I made a couple bucks, but still you know and I'm training on my training them and then unfortunately, something happened and we had to let him go, and you know things like that happen, but it does suck as a business owner. So all right, let me see anybody get the the movie quote yet there's a movie quote popping in, I don't know if anybody got it yet I haven't seen anybody say it yet, but all right, let's see what else. Okay, there you go. Retread retread says GC foots took four stood for fan, cooling and gh was for a fan heating, so cool.

No. I have not worked on boiler systems. Matt, sorry, but, okay, let me see what we got here Molly. What is this? What are you saying there Molly? You can answer questions from head pressure: compressor, condenser, evaporator expansion valve exhaust fans, oil burners, two receivers, dryers Molly; I'm gon na go ahead and remove that comment no offense to you Molly.

But no. I don't think that you can answer questions about head pressure, control, valves and stuff. So let's leave the questions to the other people again, no offense to you Molly, but that yeah we're just going to take that out of there. Okay, all right! So I'm gon na go ahead and get to a couple other things so um.

Oh, this was another really good. One too so AC Nickerson had to ask me this was on the last live stream. I believe he had asked me about my first solo service call to talk about an early service called describe okay, so I can't remember my first service call, but there's a very memorable early service call that I had where I failed miserably. At the same time, I'm not gon na talk crap, but there was some circumstances that went into my failure, that probably weren't my fault.

So I was working at a very popular Mexican restaurant chain. They still do exist. I don't do work for them anymore, but I'm not going to name the chain but and we had a remote refrigeration system. It was a cook straw unit, it had a stainless steel expansion valve and I was still very, very new in the trade.

I was not very familiar with brazing, I definitely braised a few things, but I wasn't very familiar with it. I'd worked with silver solder before, if you don't know, when you're working with dissimilar metals, copper to stainless copper to brass, you need to use a silver bearing solder, a high silver bearing solder, I'm a 56 percent fan with silver solder flux, but anyway. So essentially, I needed to replace an expansion valve and I will actually no. I think I was fixing a leak on the expansion valve and for the life of me.

I could not get the the weld to take okay or the braze joint to take and it was a stainless steel valve. So I know what I did wrong and I know what I was doing wrong, but it's one of those things where I wasn't properly trained. Okay - and this is where I feel like we throw technicians out into the field a little too quick - we need to give them a little more practice, I'm not a fan of the sink-or-swim. I know that a lot of people did good with the sink-or-swim.

In fact, I was a product of sink or swim. I was thrown out there and I had to figure things out, so I was trying to well to braise in that stainless steel expansion valve and for the life of me. I could not, and I must have been on the job like I can picture the day and I could picture it being 3-4 hours - something like that, but it took me a long time to yeah. It was Anthony D, very cool man, con air, so um.

It took me a very long time and I could not get the weld to take okay, so I ended up having to have my dad come out. He was pissed off and mad at me because he had to come out and what it was essentially was. I just wasn't heating the valve up enough. Okay - and it's just one of those things where I'd seen it done so many times, but I just hadn't done it enough myself and that was one of the early service calls, and I still remember that one too, they stay, there's also another one where I can Remember being a little kid this I wasn't even in the field, yet I was a little kid working with my dad.

We were working at that same Mexican restaurant chain and we were working on a package unit on the roof and for whatever reason I don't know what my dad was doing. The unit was still live and energized and he gave me a control wire and I was probably 9 or 10 years old working on the roof. Again you know things were way different back. Then I went to work with my dad when I was 10 years old but anyways.

I was working on the roof in a package unit and my dad gave me a control wire. It must have been an R wire or something, and he told me to hold it and don't let it touch anything because he needed to go downstairs and of course, I'm a 10 year old right and I'm looking at this wires control voltage. I know because I can picture everything about it now, so it's just 24 volts, but I'm looking at it and he says: don't let it touch anything well. What do I do as a kid right, I'm sitting here thinking well.

Why? So I take that wire and I touch the cabinet of the unit and it makes a tiniest little spark. I can remember the spark and then I instantly felt regret and felt like. I was in trouble and I remember my dad was so pissed at me. He's, like god, dammit, you know whatever, but it was just the funniest thing, because I was a 10 year old kid and my dad told me not to let it touch something, and I was curious what would happen if I let it touch anything.

You know. That's another early memory that I remember as a kid too. So alright, alright, let's see yeah, definitely Ernesto I mean getting thrown in that quick man that can that can definitely call it. You know be difficult.

So, let's see what else know in guys. Don't I I appreciate it Molly, you know, there's nothing wrong. Molly, it's just you know the guys. Don't don't start crap or anything, don't be offended it just yeah.

Don't don't you yeah just let me answer the questions. Okay, so alright. So I want to talk about someone had asked me about three-in-one Start kits so, and I've talked about these before Rito Felix. You asked about three-in-one start kits and he wanted to know how I sized them and different things like that.

I am NOT a fan of using Start kits, okay, and I wish I had one here to show you guys, but I'm talking about like, for instance, I'm gon na throw up going to the bus, but and I use them, but for a specific use. Okay, so Sopko has a three-in-one start kit. It comes with a start, capacitor and overload built into, or actually doesn't have an overload. It's a start capacitor and a relay built into the the little kit.

Okay, and it basically has a couple wires. You hook it calm and start and run and it'll get your compressor going. They usually rate them in different horse powers, but here's the problem if you've ever taken apart, a refrigeration compressor. Okay, so let's just say you take apart like RS t 64 or something or other Copeland compressor and you go to Copeland.

And you say: what's the horsepower of this compressor and they say it's a three-quarter horsepower compressor! Okay, if you go get a three-in-one start kit for a three-quarter horsepower compressor, I don't even know if they make them that vehicle. You could just say a half horsepower to. But if you go to get a three-in-one start kit for it, let's just say a half horsepower compressor, it's not necessarily going to have the same start. Capacitor is what the manufacturer has on their compressor.

Okay, so they will oftentimes get you out of a bind okay. I will use three-in-one start kits to start a compressor up, alright, but that's about it. If it starts and it runs, then I will take the three-in-one out and I will go get factory starting components. I'm not a fan of leaving three-in-one start kits on compressors.

That's my personal preference, not judging you guys, but I tend to notice a lot of problems. They tend to cause overheat issues, especially when they're not sized correctly, and it just creates havoc. So I'm not a fan of using three-in-one start kits. That's just my personal preference.

So alright, let's see what else untamed you said, you watch my Dell for a prep table with me. Changing the power head under pressure never knew that was possible. How much refrigerant was lost right. So that is a really good question: untamed.

Okay, how much refrigerant is lost if you change a power head under pressure. Let me ask you this other question: how much refrigerant is lost when you hook up a vacuum pump to a system and you evacuate it properly? Okay, I'm not saying that. I am perfect. You have to make a judgment call on whether or not it's worth it for you to do a hot swap and change a powerhead under pressure, often times if I do a hot swap the amount of refrigerant that lost is so minut.

In my opinion, this is my opinion. It's going to be less than if you hooked up a vacuum pump and properly evacuated the system, that's after you've, recovered or after you've. You know pumped the system down or something like that, because there's always going to be refrigerant. Stored in the little pockets in the unit, they're gon na be refrigerant stored in the oil.

So if you pump down a system to a very, very low pressure, you know and swap out the power head really quick and you have every preparing prepared. I can have a power head swapped out no joke in like five six seconds twist it off twisted on be done, okay and, in my opinion, I'm losing less refrigerant than if I was to hook. You know to pump the system down and hook up a vacuum pump. Now I don't do that.

Often there's only certain situations where I'm gon na do that. You know so, but you need to be very cautious about that. You know and make sure that you only do what you're comfortable with so, let's see what else we got here: okay, I'm sorry, Jenny, yeah I'll! Just just let me see what else I got doing here. Yeah you just type your question again.

If I missed it, it's hard for me to scroll back up. So let's see, okay, all right, you got it answered, then, okay, so primetime, your father was a very harsh teacher. Still is, but it's the best way. You know there's arguments to be made both ways.

So yeah I was raised by a you, know very harsh person, but it was a very smart person and taught me everything that I know so you know it is what it is so, but you also got to understand too and in primetime things are different and The younger generation coming into the trade - this is my opinion. The younger generation coming into the trade can't handle that harshness anymore and yes, we would think we all went through it. Why can't they? But things are different. The younger generation doesn't take crap anymore.

So if it's not easy and spelt out for them a lot of times, they're gon na walk away, so all right, let's see what else does Canada use the same refrigerants as we do in the US market, or do they use H, C's, like European countries? Do you ask because you're looking to move outside of the USA market? That's a really good question in Canada I mean they pretty much use the same refrigerants. They follow the Montreal Protocol. I would think that the European market would use some of the newer refrigerants a little bit more than Canada would but guys anybody. That's in here, Joe.

You guys use pretty much the same refrigerants. You guys have the same. Our 290 crap popping up - and you know, are you guys - phasing out refrigerants faster than us, Joe Joe, will answer there so guys. If anybody in here has questions for Ralph, I saw someone mention Ralph's name in here I'll post it in here right now.

Here's these email address Ralph works for Honeywell refrigerants, so let's see what else? Okay, so Joe 65 great question. I saw your comment about that, and so he asked when I increased the fan speed on the AC in today's video. Did I mess up the balance in the building? Yes, okay, if you do adjust, fan speed on an AR to you or a package unit, it is gon na affect the balance in the building. Now I can tell you that I didn't get it on video, but I did check the balance and in fact, that building was already running in a negative air balance, so by me correcting the fan it actually helped.

Now, if you paid attention to the video look at back in the beginning, look at how low my air flow was. I think that someone adjusted the airflow to compensate for the plugged up metering device. So that's definitely. I think that that was part of the original problem.

I don't know what they're doing cuz the airflow was really low on that unit. So by me adjusting it. I got that unit back up to specs, but yes, it did affect the balance, but it actually helped the balance in my situation. So you do need to be very careful in situations like that.

You don't want to mess with building balance without knowing what you're doing so, and I half-assed know what I'm doing so. Um, let's see what else huh yeah primetime yeah. So you know it is old-school. You know we have to.

We have to do some things. We have to things are different now, so we have to tailor a little bit to the younger generation and I'm part of the younger generation. I was just raised old school, so I'm only 36 years old. So it's my generation.

That majority of the time is the problem. You know, there's a lot of people, sometimes younger. I like to think that I'm not Emily. I think technically, I am, but you know we just got it.

We got to change the way that we think, because the younger generation is different. So let's see what else all right, let's see what else we got going on. Okay, so, let's see what else do I recommend hard start? Kids, I'm not a fan of hard start. Kids, I have put them on there's a difference between a three and one start: kid and a hard start kid.

A hard start. Kid in my opinion, is there to help a compressor once it's starting to fail. So you know I'm not a fan of hard start. Kids, but I mean if, as long as the customer knows, that the compressors on the way out then yeah I'll put a hard start kit on there.

So, let's see okay, oh definitely DJ sub ere do I all did I always have the attitude for the bigger picture when working with my dad? Yes, I did okay, so my dad doesn't work in the trade anymore. I shouldn't say that he still he works in the office. He doesn't work in the field anymore, okay, so he's still involved. But yes, I I was looking at the big picture.

When I worked with my dad now. My dad taught me a lot of the B gave me a lot of the mentality of looking at the big picture, but being raised by an old-school person. I wasn't given a lot of details. Okay, not nothing against him.

It was a different time. The trade was different. Okay. I wasn't given a lot of details and I wasn't given a lot of answers that I needed, so it really sent me looking for the answers, so you know - and you know why - why are we changing all these parts in this machine? Well, cuz: we've got the refrigerant out of it and you know, I'm not you know, and essentially we weren't super confident on what the problem was.

So we changed these parts. Okay, again, I'm not talking crap. Okay, things were different. That's how you troubleshoot it and diagnosed a lot in the past.

I didn't really like that, and that got me really thinking more about the big picture too. So the big picture diagnosis definitely comes from my dad. He taught me that, but then also he got me thinking about more things, because I couldn't get certain answers and different things from him. Okay and again, I can't stress enough guys.

I am so thankful for everything that my dad taught me and I'm not talking crap on him. It's just I'm pointing out the fact that he was an old school technician and things were different than okay and there was things that people didn't know and were taught, for instance, coming up in the trade. I've said this before to: I was taught to charge in our 22 air conditioner by blocking off the condenser gating, the head pressure to 275 psi, and when I did that my suction pressure should be 65 psi flat out. That's how I was taught and it worked when we had really low Seri quipment, but that was not correct.

We should have been using target superheat, okay, because we did not have a lot of tea xv's and package units. At that time it was all fixed, orifice or capillary tubes, and we should have been using target superheat, but that got us by the equipment was very forgiving. Nowadays, it's not forgiving. We can't do that kind of stuff anymore, so we need to be more thorough.

We need to be looking at everything, so, okay, all right, I'm gon na see I'm gon na go ahead and play a little video clip for you guys. Let me go ahead and pop this over here, real quick. Let me pop this up and I had a question today about liquid injection valve on a heat craft condensing unit, so heat craft uses a different type of liquid injection lately they're, not using a standard dtc valve and they're, using a capillary tube type liquid injection valve. So someone had asked me about it today before I went on the stream - and I happen to have a condensing unit sitting at my shop, so I am going to go ahead and play a clip for you guys right now.

Let me go ahead and click this over and click this off click this off and I'm gon na go ahead and play this clip for you guys and then I will be right back all right excuse! My mess back of my shop is a mess right now, but I wanted to talk about something. I've talked about these a little bit before, but we have something that we add to scroll, compressors oftentimes on low temperatures. You can do it on medium tempo. If you have a refrigerant that runs high discharge temps, but especially on low temperature Scrolls, because they have higher compression ratios, the compressor typically doesn't get enough cooling going back to the compressor.

So you can have overload issues what we usually do is we have some sort of secondary cooling coming to the compressor. Most of the time you'll see them factory installed on a Copeland compressor, something called a DTC valve discharge temperature controlled valve, basically, okay - and this one. My bad sorry about this back, my shop is a mess right now, but I wanted to talk about something. I've talked about these a little bit before, but we have something that we add to scroll, compressors oftentimes on low temperatures.

You can do it on medium tempo. If you have a refrigerant that runs high discharge temps, but especially on low temperature Scrolls, because they have higher compression ratios, the compressor typically doesn't get enough cooling going back to the compressor. So you can have overload issues what we usually do is we have some sort of secondary cooling coming to the compressor. Most of the time you'll see them factory installed on a Copeland compressor, something called a DTC valve discharge temperature controlled valve, basically, okay, and this one, though, has a little bit of a different valve, and I get questions.

I actually just got a question about this today and I had one of these sittin at the shop, these heat craft, condensing units. So I figured I'd pull this apart and show you guys. Okay, this is a first off heat craft. You do a great job of soldering in your fittings.

That's absolutely stupid, right, dumbest crap in the world, but anyways. This is a liquid injection valve. This is a little bit different type of a liquid injection. Okay.

What it does is it's feeding all the time.