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. I kind of feel like I just want to let the intro music go on over and over and over again.

I don't know if any of you guys that are watching right now saw the the link that I posted earlier, but I swear I'm so slow when it comes to this live streaming stuff and I'd posted a link, and then I accidentally clicked go live like 30 Minutes before the stream and it just laughs anyways, hopefully you guys are doing well. Hopefully you guys had a great Thanksgiving nice break. Today was the first day back. It was kind of chaotic for me we'll just like a cluster of a day, but it's all good.

Yeah, hopefully all's going well. I know some of you guys have some crazy, cold weather right now here in SoCal, it's kind of nice. We had some rain last week and then it kind of warmed up a little bit. I want to say today was like in the mid to high 60s and then we're supposed to get a cool-down again and get some more rain and stuff, but yeah it's our winter time.

You know we're wearing beanies and ugg boots and you know it's 60 degrees outside so but Smith six-six-six. I think I see your question right there. I will try to get to that here in a few minutes. Anybody else have any other questions be sure to post them in caps, lock, okay in the chat and then I'll address them as we go as usual.

I have a few things that I want to cover and then we'll kind of transition into the questions. Okay, so don't if I don't post your guys's question, don't hesitate to post it again: you're, not gon na piss us off. Okay! Well, usually, if I'm not gon na answer a question, I'll just say: hey, I'm not gon na answer that one okay, so just you can keep reposting it. It's all good! Okay! I took a little hiatus while I was on Thanksgiving break.

I shouldn't even call it break. I just basically didn't post a video for a week, so you know I posted a video last night and it was on an exhaust fan. It was a utility set exhaust fan that was not moving air properly and we're having some issues with the fan, and it was an interesting one, because I I really liked reading the chat or the comments on YouTube, because I get a lot of people that more And more people lately that are commenting and giving their opinion about things, and you know it's funny because I get some of the questions are very similar. You know, like repetitive, questions like hey: how come that thing? Spinning backwards? It's it's the the cameras framerate or something like that.

Okay, so the the wheels not spinning backwards. I get that one so many times you guys, don't even didn't. Even imagine how many times I get that comment emails all that different stuff. Okay, but I do appreciate the comments though, and you know I have some people that are commenting a few things that are pretty cool ideas and different things to do so, keep it coming guys when I post those things, put your input in there.

Okay, I have no problem with criticism if there's something that I did wrong call me out on it. Okay now be prepared for me to rebuttal, you know and ask you some questions and stuff, but I'm not rude about it. So I have no problem, but I really do appreciate your guys's feedback. Okay hum, so I want to cover a few topics here: real quick and then, like I said I'll get to the stuff inside the chat here.

One of the biggest questions that I get and I kind of covered this a little bit on my Saturday stream. I don't know if you guys saw it kind of like a bonus Saturday stream Saturday evening, where I just talked and let people let let viewers come on and talk to me live or whatever, but I'll try to do that a little bit more often, I want To try to keep this stream more of a technical stream on Monday nights, and then maybe you know on Sunday or you know some other day randomly throughout the week I'll you know, do another bonus stream or something. But one of the questions I get a lot is asking me how to learn refrigeration. Okay, this is a really easy one, there's so many different ways to learn: refrigeration.

Okay, I can't stress enough the book that I preach every single time: commercial, refrigeration for air conditioning technicians by dick words, you can get this book there's. Actually an Amazon link inside the show notes of this video. That's an excellent book, a great starting point. You know, community colleges are a great resource.

I kind of mentioned this on the stream on Saturday, where I didn't want. I don't I'd hate to see, you guys go spend you know 18 to 30 grand whatever it is on a private education, and I have no problem with people spending money on that stuff. But I'd implore you to look into a community college program, take some night classes and then, if you feel like you're gon na get some more benefit from a private college, then go that route but at least start on the community college level. So if you guys are interested people that are watching this, I'm sure you guys are all in it, but I mean I quite I get this question quite often in my videos, but if people are interested in learning about refrigeration, you know you're gon na get a Little bit from your your trade schools and your community college programs, but nobody's gon na give you in-depth refrigeration.

Ok, you've got to kind of do that. Research yourself, where you're gon na get it is by reading books like that commercial refrigeration for air conditioning technicians, you're gon na get it by watching YouTube videos, but you have to be very careful. Don't just listen to some idiot on YouTube right here! Okay, you got to do the research yourself to make sure that the information being given to you is accurate. There's a lot of jokers on YouTube.

You got to be very careful and I'm not gon na say I'm a saint. I make mistakes all the time you can't just say, because I saw something in a video that that's how you do it. You got to do the research yourself. Okay, read the manufacturers, technical data, look up manufacturers, websites; okay, you see a common refrigerator.

Whatever look the website up and look at the service department and look at the technical stuff on the website, every manufacturer has great information on their website. So all you have to do is ask the Google guys just just do some research and try to figure it out and you will find all kinds of great information. Okay, one of my really good buddies. Mr.

Brian Orr has an amazing website called HVAC our school comm. Okay, go to that website. Sign up for his tech tips. He does a podcast.

He has YouTube. He goes way more in depth on the stuff than I do. My stuff is service, call videos, okay and then I just shared a little bit of knowledge that I have with Brian the the knowledge that he shares on his website and his content and his platforms is amazing. Ok guys so check out HVAC our school comm for sure when you guys go to my youtube page.

If you go to HVAC our videos on YouTube, there'll be a tab where it says subscriptions. Ok and it'll show the recommended channels. Ok, there's a bunch of channels on there. I just updated it putting curious HVAC on there, but there's all kinds of channels that I subscribe to and then you could also see what I subscribe to also, but the recommended ones are the ones that are pretty good.

You got to be cautious about what I subscribe to, because I do subscribe to some of the jokerz channels too, so I'm gon na, let you guys figure that one out on your own, you guys got to kind of do your own research. Ok, let me go ahead and see what we got going on. Okay, yeah really appreciate: if you guys hit the like button, it definitely helps out the stream. Okay.

Let's see you just need a poster of that look yeah. I don't know what you're saying there Justin. I'm gon na go into. Where can I get the EPA 608 exam? Hvac kid? That's a really easy! One! Okay go to the ESCO ESC! Oh I bet you anything.

I'm gon na! Look it up right now! Yeah see! Oh! I bet you it's a.org! Let's see! If it is new, it's not org s cocom. Maybe then s, co, e, co! Dot-Com! Let's see if that's the right website s, Co, calm! It's es! Co look up s Co on Google for some reason my computer's taking forever to search this up right now, but look up s Co on Google es Co, they'll have training resources and they'll have areas places that you can go that they'll have a directory. Basically, that will direct you on where to take the EPA 608 exam, okay, so all across the United States, you have to have it's a federal requirement that you have your Section: 608 exam or there's a few different ones. 609, I think, is automotive and I think there's a there's one other one too, but you have to have at least one of those eggs certifications basically to be able to handle refrigerants in the United States, okay elsewhere in the world, they may have different certifications.

Okay, now then, in each different municipality they may require licenses and different things. I'm in California, you do not have to have any other certifications, but why, besides an EPA Section 608 certification to handle refrigerants other than that, you can be an HVAC technician. Okay, so just look up s, Co and they'll have all their training information and where you can take the test at they're, a great resource for that. Okay, let me see yeah my bad Justin.

I don't know what you had written there, but alright. Let me see if there's any questions and here Copeland's service manuals are a great resource to HVAC rookie, the Copeland service manuals are amazing. I will say that it is more and more difficult these days to get your hands on the Copeland refrigeration manuals. I'm gon na grab one from behind me in my bookshelf.

Here I got these from when I was in Community College and they are old school resources. It's a Copeland, refrigeration manual. I used to have Amazon links in my show notes, but I find that those links have expired and they're not very good links. This is a very old manual.

I think it was written in the 60s guys, but the information is so relevant. If you can get your hands on these Copeland manuals, they are amazing. You might be able to find some stuff on Amazon, if not I'm sure, reach out to someone at Copeland or Emerson they'll be able to help you out. Maybe the supply houses will be able to help you out.

This is a great great resource for for refrigeration and air conditioning. I will still lean on these things to help me with line sizing and different things like that, when I can't get the information from the manufacturer, so this is a great resource right here. Okay, I always keep those those few books up there great little books, alright um. So, alright, I had a specific question from a gentleman named Zack and he had asked me about head pressure control valves, okay, so he gave me a little scenario and I'm kind of just paraphrasing his question and adding some other things in here.

That, I think, could be like a great lesson. Okay, so he was working on a refrigeration system. He had found a leak and he charged the system up to a clear sight, glass, but the unit had a head pressure control valve, but when it was running it was six degrees ambient temperature outside. So it was very, very cold, so he cleared the sight glass at 6 degrees, but what he noticed.

We don't even need to say whatever refrigerant was in the system, because the head pressure control valve had a stamped bypass pressure on it of a hundred and eighty psi so disregard what refrigerant it is at a hundred and eighty psi for whatever refrigerant was in that System that head pressure control valve is going to start to bypass but Zacks problem and his question was: the system was coming down to temperature, but the head pressure control valve was not maintaining 180 psi in the system. Okay, it's very important to understand that, just because there's a pressure on there, that's stamped on the side. The bypass pressure does not mean that that head pressure control valve is always going to mean 180 psi different refrigerants do different things, but what that means is. Is that that head pressure control valve is gon na bypass at 180 psi? So what I instructed him was in that situation, because he was noticing that his head pressure - if I remember right from the email it might have been like a hundred and thirty hundred and forty psi again, the refrigerants, regardless.

Okay, probably r22 from those pressures, though, but um. He noticed that the head pressure was like 130 hundred and forty psi, and he was confused as to why the head pressure control valve was stamped with 180 psi. So again, that's just the pressure at which it starts to bypass. Okay, remember that the head pressure control valve is there to maintain a pressure differential across your expansion valve so that you can pump the refrigerator.

You can push the refrigerant through the system and it can absorb the heat in the evaporator, all that good stuff, okay, but in his situation I advised him to maybe looking into adding a fan cycle switch to that system too. Okay. So that is a common misconception that I do get from. A lot of people is just because it has a head pressure.

Control valve, with whatever pressure stamped on the side of it, does not mean that it's gon na maintain that pressure all the time within the system. Okay, so that's a very important thing to understand. As you ambient temperature drops just by passing, that condenser is not necessarily going to be enough to maintain that head pressure. So you know he could have other things wrong too, but in some situations when it gets really cold, especially since he had a six degree, ambient temperature, he may need to add fan cycling to that system too, okay and mind you.

His system was coming down to temp from the email that he gave me. Okay, it was just. He was just curious why it wasn't maintaining that pressure. So that's just a little bit information.

Okay! Hopefully that helps you guys a little bit. Let's see if I'm missing anything in the question here, have I tried cold war from spore Lynn? I don't know if I've quite read that book. Yet I've read a bunch of spoilin documents and tech tips. I don't know if, if I've seen that one yet or maybe I have - I don't know I may not even remember so - let's see what else really really appreciate that alright yeah definitely guys hit the like button.

It really does help out the stream. Is it worth getting to study refrigeration units? What do you mean by that Jason Albert? I don't know what you mean by that question. You took nathan Peterson. You said you took all three for under $ 100 from ESCO.

Yes, hey one thing I will say guys, there's several different training organizations that give the EPA Section 608 exam. It's very important that you study the manual that comes with so basically when you sign up for that exam, you need to study the manual that comes with that. It comes with a study guide basically, and what I'm getting at is our SES has a 608 test. Esco has a 608 test, I'm sure there's some other people too, that have a 608 test and each one of those tests might be a little bit different guys so make sure you read the study guide that comes with the particular test.

You're gon na be taking it'll help you in the past. A lot of people ask me like hey. What do I pay attention to when I'm studying for the exam and I've heard mixed results in the past? When I took it, I good gosh. I took that test all the way back in 2002.

I think - and the dates were really important back then, but I've heard sense from other people that the dates aren't aren't so much important anymore. So I don't know okay, so I really don't know the answer as to what you need to study. So just make sure you read the study guide for the particular test. You're gon na be taking okay.

So if you bought it from a supply house, make sure you ask him for the study guide you know or wherever you're gon na get it from alright the the EPA. The 608 exam. Really isn't that difficult to take it's just a matter of reading the information they it's all in the study guide, all the answers you just got to read it and then you got to retain it and take the test. Okay, I will say I'm gon na knock a bunch of, hopefully the testing organizations.

Don't get angry with me and I'm gon na tell you, though, that your seat, your Section 608 yeah, there's some important things in there, but there's some stuff you're, just gon na throw out the window after you pass the test. Okay, especially the dates, I think the dates, at least when I took it were the silliest thing in the world. It seemed like they were just filling up the test. The biggest thing is is to understand.

Is that refrigerant? Thank you very much for that super chat. I really appreciate that Joe, it's really important to make sure that you, you understand that you're not allowed to vent certain particular refrigerants again everything's changing out now that we have co2 as a refrigerant and our 290 as a refrigerant. You can vent co2 and you can vent our 290, but you still can't vent our 22 404. You know all those different refrigerants, so you know that's the biggest thing about the test.

Is it's just gon na drill into you, the rules? You know, and it's gon na, give you some ideas about what you have to recover. You know that kind of stuff. It's real, simple, stuff, alright, but you just got to remember the information and pay attention to it all right. Let's see what else, let me see, how did I get some of Chris's logos on my name? Oh seven, one, six appliance guy, okay! So what you guys, if you guys don't already know I turned on a membership thing on my youtube channel and as part of the membership, it's kind of a way to support the channel.

I do not require that from anybody. I'm going to continue to do these. Ok, but there's a couple different methods that people ask if they can support you can support me through PayPal. You can support me through a super chat, like Jason Yaeger just did.

Thank you very much Jason. You can also support me through patreon. Ok - and you can also support me through YouTube's membership. So if you go to my youtube page, there's a little thing that says join if you click that join, it has all different tiers.

I think from $ 1.99 all the way crazy numbers too. So as a perk and I'm still working out the whole memberships thing, but as a perk, seven one six appliance guy you'll get that little logo next to your name. So that way, people know that you're, a member okay. So ho I don't know if someone else answered your question already or if I just scrolled up in there, but that's how you get that little logo.

So thank you very much Jason. I really appreciate it bud all right. Let me see what I'm missing. There are too many rookies hey.

You know that is kind of funny. I'm noticing that there's a bunch of different guys that have rookie by their name. I find that so comical again, not that there's a bunch of guys, but I love that name: rookie, refrigeration, rookie, air conditioning. You know I love that little the whole idea of a rookie right because we're all rookies right, it's kind of a funny joke and in fact, rookie refrigeration.

And I were having a discussion on whether or not he should change his name or not. And I don't think he should, because it's not so much of a rookie anymore, but we're all rookies guys, even if we're experienced and we've had 12 years 10 years 20 years 30 years, we're all learning every single day. It's never gon na! Stop! Okay! Oh, thank you very much, seven, one, six appliance guy again guys! I don't require you guys, it's not something! It does help to support the channel, but thank you so very much for becoming a member seven one. Six appliance guy you're, awesome, dude and thank you very much Jeff the maintenance man for that super chat dude.

I really appreciate that, but alright do headmasters modulate or they hard off on/off elves Dave. That is an interesting question. Okay, I'm gon na answer that, from my experience and headmasters modulate, okay, you can have a headmaster that is not bypassing all the way dependent on the pressure. Now I would love and actually I have the ability and we will do this.

I will get a spoilin engineer one time and we will get a spoilin person on here to answer all of our questions about head pressure, control, valves, okay or Headmaster's, or L, AC valves or you know or whatever you want to call it. But there are essentially all head pressure: control valves, headmaster is actually an al code, trade name which is now an emerson valve, but spoilin makes a head pressure, control valve or an l, AC valve or an O ro a valve. They have a couple different types of head pressure control valves, but in my opinion, yes, they do modulate its you. You can have one that's partially bypassing and then all the sudden it'll slam shut okay, but again I'd love to get a spoilin engineer to clarify.

I could be completely wrong, you know we'll have to get them on here and talk about it. So that's something we'll definitely do and we're also gon na try to get a. This is something that we're working. I guess I can talk about it.

We're gon na try to get a manufacturer of refrigerants on here. I'm not gon na name which one, but you guys can probably figure it out, because I'm always talking about them. We're gon na try to get a manufacturer on here, maybe get one of their engineers. That's really really smart with all the new requirements and codes and different things with the refrigerants, and maybe we can do a QA kind of like I did on Saturday.

Maybe we'll do something like that was Portland too. Did anybody in the chat watch the QA that I did on Saturday, where I had younger people come on or new people in the trade and ask questions? What did you guys think of if you watched it in the chat? Was that something interesting? Do you think I could continue to do that kind of stuff like I was a bonus stream where I let people come on and ask questions, I kind of think it's a cool idea. So I'd like to know what you guys think in the chat too. So, let's see oh yeah, definitely email from Ralph, oh yeah, Copeland contact there you go oh yeah, Don, okay, Don Gillis, yeah Don.

I think I'm gon na be able to meet Don Gillis Ralph at the HVAC, our school training event in Florida in February. I believe Don Gillis is gon na, be there. I believe I could be wrong. I could be talking out of my ass right now, but yeah so I'll get to meet him there too, but I'll definitely reach out to him.

I would like to do the whole bringing more people on every now and then again it won't be replacing this. This will still be the standard QA where I just come on in rant and talk about whatever I want. It would be bonus streams. You know where we scheduled on a Saturday or whatever day, and we try to figure that out so yeah I like to keep my my routine of two videos a week, ish right and educational videos.

And then you know the streams on the QA streams. On Monday night and then maybe bonus streams for the other stuff, that's kind of the idea, so awesome yeah, no definitely I'll try to schedule it a little bit more so yeah. The interview stuff is definitely something I want to do with the new guys too. Talking to them so yeah I'll definitely work on that, so all right cool all right.

I want to get to some more questions here. Let's see it was really cool bonus stream, yeah cool right on right on seven one, six appliance guys see you later bud. Okay, all right cool - let's see, remember guys if you have questions put them in caps, lock, okay, anybody get the movie. Yet I don't know if anybody got the movie yeah, the movie quote all right, um, I'm looking at my list of here, okay, one question that I get I get this one often so someone actually specifically asked me on my video that I released about the set Screws: okay, when I'm adjusting a set screw on a pulley on bearings, or anything like that.

Okay, I like to set the screw in and I call it running the screw okay. So what I do is I'll snug up the screw by tightening the allen wrench and then I back it off, and then I tighten it and I back it off and I tighten it and what you notice. I call it running. The screwin is that you're actually pushing that screw the set screw into the shaft you're, actually making a groove for it.

Okay, so, each time when I tighten it, it goes a little bit tighter and it goes a little bit tighter because I'm actually scarring the shaft or whatever the pulley or whatever okay. So that was one that I actually quite. I get that actually quite often people asking me what I'm doing there. It's just a real simple thing that I show in my videos, but I just called running the screw in ok, so loose and tight and loose and tighten tighten.

You know the third time and you'll notice every single time it'll go a little bit tighter, so definitely something you want to do. Do I recommend someone going for a contractor's license if they're working 9 to 5 - hey Zeus, you know, hey Zeus, I'm gon na answer that question and I'm gon na I'm gon na. Ask you a question, or I kind of said this on my stream on Saturday. I'm all for people going and getting their contractor's license and starting their own business.

That is amazing, if you can get to that point, but please please, please don't try to start your business. If you don't know what you're doing you do not have any business starting. A business straight out of trade school. Ok, I'm sorry, but you don't you need experience.

So, hey Zeus. Do I think that someone should get a contractor's license for sure if you feel like you're financially ready before you start a business, though? What I would highly suggest you do is read up on some business books: okay, check out my buddy tersh Blissett on the service business, mastery podcast, just Google search service business, mastery, podcast, simple: ask the Google and his podcast will come up subscribe to that. There's all kinds of great business tips and strategies on how to set up your business properly and there's tons of books out there too on how to set up a business how to be prepared? Ok, not only do you need to be financially ready to Co for your contractor's license and start a business, but you also need to be technically ready. You need to be a qualified service tech that really knows what they're doing, and I'm not saying that you are not qualified, but I'm just saying in general, I'm answering this for everybody.

You definitely want to make sure that you know what you're doing before you even consider starting your business. Ok, one of the biggest things about running a business is understanding pricing and how to properly price yourself. I get this question quite often from different people, hey man. How do I price this or I want to make sure you know? Is it a good idea if I price lower than all my competitors and it? No, you don't want to lowball everybody.

You've got to make money, you've got a you've got to sell yourself and you have to get paid properly. You do not want to go in and lowball the industry again, I'm going off on a rant. That's getting totally separate from this! We'll talk about this more another time, but yes, I think it's a great idea if you're considering going for your contractor's license just make sure you're correct you're prepared for it. Okay, so all right, you broke both sides.

You're allen key trying to get the pulley set screw out cut the Allen so take one side of it and cut it with a hit it with some Crowell or some penetrating lubricant, and if an Allen screw allen key breaks, you just cut it off and then You have a clean allen key and then you know you just eventually it'll get so short. It won't work, but that's a little tip you could do so. Let's see, let me see mm oh yeah, okay. I see what you're saying there.

Any industrial insiders would be cool interesting. Okay, do I recommend? Okay, I already answered that one. Oh ice machine, Rickey yeah. You had asked me that question yeah the whole heat exchanger thing man I mean if you're not qualified, to change the heat exchanger yourself.

5:44. A heat exchanger that actually doesn't sound too bad to me, but I don't know what type of unit it is, but you know you can always get multiple quotes. I would highly suggest you get multiple quotes and just because again I'm not trying to knock anybody's business. I had mentioned this, I think, in the email or on Facebook or something I told you, I see machine rookie, oh maybe on the past stream that I deleted.

You know, fine, you know, find someone, that's willing to come out and give you a quote that you're, you know that's willing to to charge you for the quote, and I mean you get what I'm saying like the free quote. Sometimes they're just coming out there to sell you something. So you know an honest opinion, but if they show you carbon monoxide numbers or an actual hole, then you know there's really no point. You got to change it so guys the spoilin, you know apple juice, mugs or whatever are still that.

Could that thing is still going on where, if you guys on Facebook or on Twitter, if you take a picture of any swollen product, it can be old. It can be used, it could be. An expansion valve sit in your van whatever and put the hashtag spoilin 85 you'll be entered into a contest to win these. They have a whole bunch of these and they're giving them away.

I think til ah shoot. I don't. Even remember, I think it's till the end of December or something like that, but check that out guys hashtag spoil in 85 and you guys can still get those mugs they'll send them out to you guys. So alright, let's see, can I explain how a two circuit, rtu alternates to refrigeration circuits, that's yeah, Jesse Torrez, so the the simplest explanation on a two circuit are to you is that the thermostat okay are to you as a package unit on the roof.

Okay, the thermostat is a two-stage thermostat, alright and it has some sort of an algorithm built into the thermostat depending on the manufacturer. They do different things. Sometimes it's a timed. Sometimes it's a temperature thing, but it determines whether or not you need two stages of cooling.

So, let's just say, you have a ten-ton packaged unit on the roof. You'll typically have two five tonne compressors, typically okay, and on a call for first stage, cooling weather whatever the thermostats algorithm is okay, whether it be again timed or temperature. It might call for, or on a first stage, it'll call for one compressor. Okay, then, on second stage, it'll call for the second compressor.

Usually it's a timed thing. So if it sees a temperature and the temperature isn't met in a certain amount of time, then it'll turn on the second stage. Compressor and the second stage compressor can turn off at any time. When that second stage call goes away and then maybe just the first stage will still be running okay, you can also do three stage, there's all kinds of different methods, but it's it's literally just trying not to over cool the building.

Okay, because bait may be the building's the thermostat set for 74 degrees and it's only 76 in there - and you know it might not need ten tons of cooling to bring it down to temperature. So it'll just run one okay, so that way doesn't over cool the building and freeze everybody out and then, if it feels like it's not getting cold enough fast enough. It'll turn on that second stage. So hopefully that answers your question there for you, but hey y'all, know how you doing bud all right, which refrigerant is going to replace 404 hello from Panama, well Juan Williams, my buddy Ralph in here I'm actually going to take this chance to go ahead and post His email there's several different refrigerants out there.

The most popular refrigerant, that's gon, na replace 404 is gon na, be our 448 a-all right. My buddy Ralph from Honeywell, I'm gon na post his email right now. You guys can feel free to email him. If you have any questions, he has all kinds of knowledge: okay, he works for Honeywell refrigerants and he can help you out with the proper refrigerants to use to replace 404 okay but 404 in general.

The the most popular refrigerant is for, for I'm sorry, 448. A all right that is the most popular one that is replacing 404. There is other manufacturers that make other refrigerants. I personally am using our 448, a as my only replacement, I'm not really, because I really don't want to have 50 billion different refrigerants in my truck.

Okay, so in my truck to this day I have r22, I have 134 eight, I have 404 a and I have 448 a. I have are to 90, which is propane, and those are the only refrigerants that I'm using all 410 a 410, a that's the other one. Those are the only refrigerants I have in my van now there's some alternative refrigerants all kinds of different other things. So any of your questions, direct them Ralph and he'll - try to help you guys out.

Okay, all right, let's see what else I got going in here, which are better HVAC kid, ECM motors or three-phase motors with VFDs. Okay, I'm not a super genius HVAC kid! I have a preference and my preference is three-phase motors with a VFD, but with an ECM or a VFD, you have to have power conditioning. I stress about this all the time you have to have some sort of device that makes sure that you have proper power going to that device. Your your ECM motor or your VFD, which controls the motor okay power conditioning, is the biggest thing.

When we have dirty power. We have power spikes, we have different things. Some VFDs have power conditioning built into them, but a lot of the small ones. Don't okay, some ECMs might have some power conditioning built into them.

You will typically see an ECM motor on a single-phase application. Typically, not always. Okay, but you'll typically see an ECM motor on a single-phase application and you'll typically see a VFD on a three-phase application. But that's not always 100 percent for both of those things that I said so it can change either way.

Okay, so hopefully I answered that question for you Ralph great question: what is the purpose of a liquid or vapor injection in the compressor very good question? So Coplin is the most popular scroll compressor out there and they have a dtc valve. Don't think I have one back here, but the easiest way to explain liquid or vapor injection is to understand how an expansion valve works. This is a thermostatically-controlled expansion valve. What it does is it takes liquid refrigerant right through here, and it changes the state of the refrigerant and turns it into a vapor and liquid mixture.

Okay, so liquid injection or vapor injection, essentially is just a fixed or an automatic expansion valve is the easiest way? Okay, there's a lot more to it guys, but if you can just understand it as an automatic expansion valve all it does, is it takes liquid refrigerant on the liquid injection, okay and it meters? It changes the state of the refrigerant the refrigerant when the state is changed, it cools off right and it cools the head of the compressor. So that's the whole purpose. Let's just say, liquid injection okay is to cool the compressor off because on low temperature, scroll compressors in some medium temperature, scroll compressors, we have compressor cooling problems. Okay, when we have a high.

What's the right temperature differentials from discharge to suction? Okay, all of our compressors are well most of our compressors are refrigerant cooled okay, but when we have a very, very low, temp refrigerant coming back, we have hard time cooling off that compressor and that's what we'll add vapor and liquid injection to try to help to Cool the windings of the compressor and keep the compressor discharge below a certain temperature, I believe on the Copeland's about six inches away. I think it's like 225 225 degrees, I believe, is what we want to keep it under. Once you get the the refrigerant temperature inside that compressor to get hotter than 200. It's actually.

The internal temperature of the Copeland compressors is higher than 225, but they tell you to 25 outside because that's the easiest way to measure it. But what happens is the the windings can get damaged? The oil can break down the internal components of the compressor can have issues basically, if it overheats. So we take that liquid injection DTC valve vapor injection whatever, and we inject it into the suction side of the compressor and we cool off the head of the compressor is all that we're doing. Okay, so you see that a lot on the heat craft, condensing units they are coming with the capillary tube style, liquid injection and then sometimes on the newer Copeland compressors.

They have a bolt-on liquid injection on it too so really appreciate the super chats coming in. I see those coming in guys and I'm sorry I'm not addressing them. Thank you. So very much you guys are amazing.

Thanks again. Okay, really appreciate it. Did those VFDs come in for those carriers? No, the customer actually doesn't want to change those on those videos that I made about the carrier. Vfd is that failed? The customer just wants to leave them alone.

So I believe, even though they're under warranty, the customer didn't want to put new VFDs on those things they just want to leave them bypassed. So I just do what I can you know all right, I'll get to the chat, make sure questions are in caps, lock guys, so I can get to them really good question that I had from someone about electronic expansion valves or EVs. I have an EEV. This is a spoilin ee-vie.

This is not cut open, but this is a spoilin ee-vie. The easiest way to understand an electronic expansion valve is, I actually have a discharge bypass valve right here. Okay, this is a cutaway of a discharge bypass valve and the reason why I cut this one away is: I use it as my example of an electronic expansion valve it's very similar, but it has a much bigger port. So this is not an expansion valve that I'm holding okay.

This is a discharge bypass valve, but the easiest way to diagnose an electronic expansion valve so long as it has a stepper motor. This is a stepper motor style valve. Okay is to use the sporran SMA 12. Thus portland, SMA 12 is a stepper motor valve controller.

So I can open and close this valve by simply you guys can't see it, but it's actuated right now I can the valve vibrating. You can feel a little Ulla and it's opening and then we're closing okay. So thus Portland SMA 12 is a great device to try to test your V's okay as long as they're a stepper motor ee-vie. It doesn't even have to be a spoil and it works with many other manufacturers.

Okay, so that device can test and evie it can open it all the way it can close it all the way. So you can know: okay, the EEV is working, the the actuator, the the SMA 12 opens and closes it. So that must mean that there's a problem with the controller or something else, a temp sensor or whatever, okay or control wiring or whatever, but the best way. In my opinion, I is to use that spoilin SMA 12 and it's essentially just a stepper motor.

It works with electronic expansion valves. It works with discharge bypass valves, any type of a valve that has a stepper motor on it. That SMA 12 can open and close it. You guys can Google the spoil in SMA 12, and you know I'm sure, they'll help you out with what, where to get it and all that good stuff, so slay Nader.

It says what I recommend the spoilin smart probes of over another brand or model. I got to be completely honest with you, but I do not own the spore'ln smart probes are they called the spoil and smart probes? I don't know what they call them, but I do not own them one of these days I will buy them. I actually need to. I probably owe that to sport hland to buy those, so I can test them out.

I have heard amazing things from the the highest resource in HVAC, which is Jim Bergman, and he swears up and down that the spore'ln smart probes have the best temperature compensated pressure sensors in the market right now. Okay, personally, I have the field piece, Jobling probes and I love them, but I have heard nothing but good things about the s'more lense spoilin, smart probes again. Is that what they call him? I don't know but anyway, so I have, I can't say, good or bad about the spoilin probes, I'm sure they're amazing, but I can't say whether they're for sure the best okay, so I do owe that to them. I'll definitely do that.

I am also guys I've kind of mentioned this back and forth a bunch of times, but I decided to go ahead and do it. I have another YouTube channel. Okay, it's it's not even it is public, it's called HVAC our tools and I am gon na start. Posting on that, okay, because I don't want to blow up my HVAC our videos Channel with with tool reviews okay, so I am gon na start doing tool reviews on my other channel okay, so I will I'm working on it right now.

I had mentioned on my social media that I was testing out a bunch of different pants work, pants. Okay, I have I've been testing them out for a while. I made a decision on which ones were my favorites. I have a whole bunch of them.

I think I bought five or six different types of brands and then I've just been testing them out for a couple months now - and I came up with a conclusion and I'm gon na make a video about it. I'm gon na put that on the other channel same thing with I have actually I don't know if you guys can see these in the background hold on I've, been seeing a lot of people talking about thermal imagers, so I have the Fleur c3 thermal imager. I have the Fleur one Pro which connects to the camera thermal imager and I have the seek shot pro thermal imager, three different thermal imagers, I'm gon na be testing them and again I'll be posting them on my other channel again, I don't even have any videos On that channel guys, I don't, I don't think I do. I don't know it's not something.

I've really talked about to many people, but I will start doing that and I'll start doing tool reviews on there and and I'll be talking about different things. So maybe I'll pick up the spoilin smart probes and I'll test them on there too. So just pay attention to that I'll share it all on. You know social media and I'll link the channel and everything later it's it's not even worth linking right now.

I could just tell you: the channels called HVAC are tools, that's enough, but I will be promoting that and doing all that different stuff. So I'll start doing tools on that, but I don't want to crowd this channel. I want to keep this channel the same way that it is with just the the service call videos and - and I decided to do the other channel too so you'll see that coming in. Let me see what else I'm missing here, guys oh right on their HVAC.

Our vlog arnesto, my buddy Ernesto, has a YouTube channel due he does service call. Video says his name is HVAC our vlogger on here Ernesto that say your channel name hold on I'll pull up your channel right now, Ernesto's yeah, it's HVAC. Our vlogger took me a second to realize: I'm subscribed to his channel too, but check out our nest. Oh, he has some pretty cool service called videos.

He works up in Northern California, I'm in Southern California, so check out our nesters channel too. Definitely a good one to check out, so let me see what else I'm missing do. I know if it's a mechanical code to have both supply and return, Ducks have smoke detectors or just return duck Sean Mack. That is actually it depends on the city that you're in every different city or every different municipality, has a different rule about return and supply.

Duct detectors: okay, the mechanical code, as far as I know just says that you have to have a duct detector and I think again I'm quoting this off the top of my head. I could be wrong, but I think it's over 2000 CFM's. I could be wrong, but I think it's 2000 CFM's or bigger. You have to have some sort of a duct detector on the commercial stuff.

But again, I'm not real smart with the code, but I know for a fact that it changes from municipality to municipality whether or not you have to have a return in supply or both okay, because I've seen so many different ones where you only have one in The return or one in the supplier or both, so it really depends. Let me see what I'm missing here: okay, cool! How much can a good installer make a year and or service tech a year? Hey Zeus, it really depends his use. It depends on the market that you live in so here in Southern California. Again I only work in the commercial side.

I don't do any residential work. Okay, I know for a fact that as a service technician here in Southern California, if you're doing like commercial refrigeration with restaurants, you can make if you're an experienced service technician, you can make anywhere from about 25 dollars an hour to about 35 38 dollars an hour. Anything past 35 to 38 dollars an hour you're going to need to go into a Supervisor position: okay and that's on the commercial refrigeration, air conditioning restaurant side. Okay, as far as residential technicians install our technicians versus service technicians, I honestly don't can't quote the amounts as to how much you would make, but I we'll tell you that it's gon na change from Southern California, to Northern California, from California to air, it's gon na Change for every state, so it really is based off of the cost of living and different things like that.

So any commercial unit has to have a duck detector. That's an interesting thought. There fly eagles lie! Okay, that's again! I don't know if it's any commercial but yeah. I guess I guess it makes sense right, because on the commercial side they want to have some sort of duck.

Detection so sorry bear with me um. Let's see, Zack is saying 2,000 CFM returns side before outside air. Okay, yeah good good, so Zack Zacks, another Channel, guys, I'm sure you guys already subscribed to Zacks channel, but the tradesmen's shoptalk channel definitely check that out. Justin they'll throw some links in to Zacks channel coming up here in just a second.

If he's still watching, Zack does videos multiple times throughout the week and then he also hosts the HVAC overtime on Friday nights. Zacks channel is awesome, so check it out, Zacks a very knowledgeable person. Look at Jason, Albert's question above. Let me see if I can find Jason Albert's question and I will try to get to it, I'm looking for it right now.

Why is my question disappearing? I see that from Jason Albert. Let me see it's: it's not your question disappearing, but let me go back up here and Jason Albert I see there. I need to find a way to look up stuff. These streams need to get a lot easier to do stuff.

Man, Jason. Is it really I'm for some reason, I'm not seeing your question here, but I'm looking all the way up. I'm Way up now, I'm not seeing your question Jason. Can you post it again? Jason, I'm sorry, but I don't know if you can post it again for some reason.

I didn't see it. Sean Macke to the best of my knowledge, do low temp scroll compressors need liquid injection. Yes, they do low temp scroll compressors need liquid injection. Okay, you definitely need it, so yeah don't try to cut it out; they should have it.

You know most scroll compressors are gon na, have a DTC valve if it's a Copeland one very important to help with that. Let's see what else, let me see what else I got in here see if I'm missing I'm sorry. If I missed your question, let me see, can I explain how unloaders work in a compressor? Poncho? Okay, I'm not super smart with the unloaders, but it's a basic concept in that it basically blocks off. It's it's like staging the compressor.

That's the easiest way to explain it. Okay in the past, we would have a 10 ton compressor and we would have an unload or on there and where it would basically shut off a couple of the Pistons okay, so only half the compressor would be running. That's the easiest explanation for an unloader again. I don't really work with unloaders very much, but I understand the concepts so it's like having two compressors in one unit and you can basically shut off half of the compressor.

That's the easiest way to understand the unloaders. Okay, let me see what I'm missing here and, let's see just trying to get to these questions: Jason, walk-in, freezer with the receiver headmaster and fan cycling in the winter. How do you know if you're charging properly added 12 pounds seems weird, Jason? Okay? So what I want you to do, if you have a head pressure control valve, hoping that it's a spoilin head pressure control valve, but if not, you still can use this same calculation. I want you to google search the spoilin method.

90. 30, one! Okay! All you got to do is Google search Spore'ln 90? 30 one. I guess I should preface that with saying you have to have a tube in fin condenser that spoilin 90 30 one method will not work on a microchannel. Condenser.

Okay micro channel has a different method of determining the winter charge or the flooded charge, but on a sporran, a standard tube and fin condenser. What you're gon na do is the spoilin 90 30 one method. I actually have a video on it, where it explains it. Okay is you're gon na calculate the internal volume of the copper lines in the condenser and you're gon na determine how much you need how cold your ambient is and there's a really easy calculation.

You just input a couple numbers and make a couple measurements, and it's gon na tell you how much extra refrigerant you have to add to the system for it to operate properly. Okay, that's the easiest method. Some manufacturers will tell you that what you can do is just put the maximum amount of refrigerant in that condensing unit. Okay, it's also possible to figure that out.

You can lean on the manufacturer most of the time like heat craft, for instance, we'll publish with a particular condensing unit, or you can call technical support and they'll tell you with that condensing unit. The maximum amount of charge in that system is whatever it is. 14 pounds you know whatever it is, and what that is, is that's assuming that the receiver is they actually leaned on the high side, 90 percent full. But most of the time, it's safe to say that if you fill the system up pumped down, if you can determine the liquid level on the receiver, you can charge it to three-quarters of a receiver and that's a maximum amount of refrigerant.

You can put in that system, okay, so if you're working on a heat craft unit that has a micro channel condenser, the manufacturers gon na tell you to put the maximum amount of refrigerant in the system. If you're working on some sort of other system, you could figure out a way to pump the system down and check the liquid level and the receiver okay, I have some other videos and talking about that too, or the best way is to lean on spoilin and Look up the spore'ln 90-30 one! That's the easiest method! You do a couple measurements on that tube and fin condenser. You calculate the internal volume of whatever line size that is it'll. Give you a calculation and tell you to add this much refrigerant.

Okay. So that's the best way to charge a system with a head pressure control valve. I don't know what system you're working on, but you had put 12 pounds that doesn't sound crazy for like a two horse 3 horse condensing unit 12 pounds that doesn't sound horrible. So long as the receiver is big enough for the system, okay, all right, let's see what else we got, how fast can an exhaust fan spin? That's that's the question: how fast can it spin? It really depends.

The manufacturer has a set speed at how many CFM's of air and how fast that motor can spin okay, and if you go over the maximum speed at what the manufacturer says, the exhaust fan can start to come apart, so once it gets spinning so fast. There's a lot of force pushing on that wheel and it'll actually explore implode on itself. Okay, so you want to make sure that you don't over spin an exhaust right. Now I will say in the past it was very difficult to make an exhaust fan spin too fast, but recently a lot of menu factors have been oversizing their equipment than putting a VFD on it and then throttling the fan down with the VFD.

I have since found on some exhaust fans some manufacturers that they come shipped from the factory at a really slow speed on the VFD, and if you speed it up past that point, you could actually be running that fan too fast. So they give you the ability to do that with VFDs now, so you got to be very careful, so you have to pay attention to the manufacturers. Recommendations on how fast that fan should be spinning your your fan itself, though. It's not a matter of just speeding up the fan.

You got to pay attention to the air balance requirements. Okay, that building has to have a proper air balance. It has to have the perfect amount of exhaust and the perfect amount of make of air, and if you have too much exhaust you're building to go negative, if you have too much makeup air you're building a go positive.