Yo, hopefully you guys are doing well this evening, nothing crazy going on here just another Monday. They seem to keep coming no matter what you do. They just keep coming and coming and coming kind of like a booger sticking, your finger, you just can't get them off, but seriously now all as well the weather's kind of cooling down we here in SoCal, it's gon na cool down a bit. Then it's gon na warm up a bit and we're gon na kind of go back and forth.

So we just hit our first cooldown, where we'll have like 85 degree days like in peak of the day and then at night time, it'll drop down into the 50s 60s. You know, and then we have what we call the Santa Ana winds when the Santa Ana winds come, then the then it'll get really well for us really cold really cold for us is like constant, 50 degrees. So we don't really know what winter is here, but it's just about flannel weather for us. So but hopefully you guys are all doing well, I see everybody in the chat, hello to everybody all kinds of people in there cool right on.

Well, I'm glad you guys made it in here. Hopefully I can meet your expectations. I got a couple things to cover this evening and then I'll definitely try to get to some of your guys's questions and we will go from there. Let's see, do me a favor as usual, if you can put the questions into capslock, that would be much appreciated because it helps us to make sure we try to get to them.

I'm trying to figure out a way to be able to better get to the questions in the chat, because what I'm finding is, there's so many questions going by and when I go and review the chat after I see that there's all these different questions that I Didn't get to answer so you guys aren't gon na make us upset myself and just in the moderator, if you guys repost your questions, it's all good! Okay! So if I don't answer it within a minute or two throw it in there again and then I'll, let you know if it's not something, I'm gon na try to answer so, but right on yeah all caps. That would definitely definitely help. So so this evening, like I said, I got a couple things I want to talk about. The one thing I wanted to address real quick was, I noticed in the live chat last week.

I can't remember who asked about it, but someone has to a couple times and I didn't seem to get to the question, but someone had asked what this spore limb box was in the background. Spoilin had sent me like a prototype, it's kind of like a beta test. In a sense, I guess, but it's not so secretive, so they don't care. If I talk about it of their BQ expansion valve kit, which I've showed that expansion valve kit on my channel many times before, basically they just have a new case for it, that's a little bit more heavy-duty, which is kind of a cool thing, because the other Case, it's not that it wasn't any good, but it definitely was a little fragile.

The little blue plastic case, sorry about my squeaky chair. Don't if you guys hear that but yeah, so this is their new BQ kit case. This is what they're it's kind of like a prototype. It's just you know a pelican case, or you know heavy-duty waterproof case basically, and it has their expansion valve kit.

You know built into there the BQ little thing and, like I said it's still just a prototype. They're gon na work on putting the instructions like they have in the past and different things inside of there, but yeah it's a pretty nice little case. I think it's pretty cool. They were kind of wanting feedback from everybody.

So let me know what you see what you guys think in the chat about it. It's pretty heavy-duty doesn't seem like if you dropped it its gon na break or anything like that, and the one thing I do like about that case is that it's essentially helps to keep the moisture out, because it does have like a vacuum seal on it. Kind of I don't you know I mean I don't know if it's gon na go underwater or anything, but one of the things about using the BQ kit. One of my fears is when I would take it into like a walk-in freezer, a walk-in cooler.

You know to build a valve how much moisture would get into the valves and different things like that. If you you know just being - and I mean there's gon na - be some when you open the case but anyways, that's just a pretty cool little case. I thought so, let's see what we got in the chat question here from Sam. How does my company deal with what's the policy for legal recreational marijuana in California, so sure, Sam, so basically as a service company, our insurance wouldn't allow a technician to use pot.

Basically, even if it's like the oils and different things like that, anything that potentially could impair you, our insurance company, wouldn't allow us to allow a technician to be on that, even if it was a prescribed medication. It's one of those things that's gon na have to just like any other medications that you get from the doctor. You know, if it says, may not, you know, operate heavy equipment or machinery or whatever we can't have that kind of stuff. So something like pot yeah.

The guys can't be on it. Basically, you know yeah. Technically, it's not illegal in the state of California, but um. You know a court, you know to our insurance companies.

We can't allow the guys to be on that. Basically, so I really don't have a personal opinion on it. I don't care either way. You know doesn't really make a difference to me, but we got to follow what our insurance companies say.

So Scott Savage. Have I ever worked with nh3. Is that ammonia? For some reason, I'm thinking that as ammonia - no, I have not. So what is the best smart prop, I'm assuming maybe probe.

Is that what you mean babe the best smart probe. I like the field piece. Joblink probes is the best one. So let me see what else I'm missing here are their kill switches on the inside of the building or just on the outside.

I don't know what you mean by kill, switch. The everything channel. Give me some more context with that question there, but let me see what else we got in here. Our carrier units, oh no carrier units, aren't the ones that I work on the most there I work on.

Oh, you know maybe yeah, maybe carriers, it's it's a wash between carrier and Linux. It's probably no. I would say: Linux is the ones that I work on the most Linux package units and then carriers would probably, after that, so let's see what else we got in here. Noah Lawrence you're in school and you're just wondering how you can get a job in the refrigeration field, so first off Noah, if you're an HVAC school or you said fresh out of school.

What I would highly suggest is just go start, knocking on doors, offer your time offer your time for a ride-along. You know there's going to be companies out there that are looking for new service technicians. So just talk to them. You know go up there and be honest with them and let them know you're you're strengths and your weaknesses.

Obviously you really don't know much about air conditioning and refrigeration. Besides what you learned in school, so it is going to take some time for you to get comfortable, but I would highly suggest for the new guys that are interested. Is you know just just send an email make a phone call knock on someone's door and you know tell them what you're all about you know be honest with them. You know and and offer to see.

If they'll maybe give you a ride along where you can ride with them for a day or two, you know offer up your time for free, basically for a day or two just to do a ride along to see if you like them and then just see, If they like you, but don't go in there, just because you you finish school and want to make something completely known to everybody, that's in school right now and that's nothing against you guys, that's in school, but the experience that you have on school. In my opinion, my personal opinion - I don't want to see that on your resume. I want to see that you went to school definitely, but what I don't want to see like I get these inflated resumes. That say I have brazen experience.

I have electrical wiring experience and I have you know you guys: don't have that experience. Okay, so I don't mean any I'm not trying to be rude. I'm just saying that's not something that you put on your resume. What you put on your resume is your and uh, you know went to HVAC trade school.

You can say here's some of the topics that we covered but do not put on there that you have experience in those topics because that's very misleading. When I'm reading a resume, it's like wait a minute. Now this guy doesn't have experience like you just learned about it. Okay, I know that some teachers tell you guys to do that, but that's not what we want to see on a resume, at least at my company.

I just want to see you to be honest and if I'm looking for an apprentice, then I'm gon na just look at your. You know the person you are, I'm gon na do an interview. You know come in and have you sit in the office and talk with me and then I personally the way that I do it is then I'm gon na take you on a ride-along and then we're gon na evaluate your skills and see where you are see. Your confidence on a ladder I had a service technician that his first day working with us.

You know he said he was comfortable on ladders and he went to go climbing a 24 foot extension ladder and the dude was holding it like. I don't think he'd ever climbed a ladder before so that was something you know you you. I guess you can't really learn that in trade school, but those are things they should be teaching you guys, you know, is how to be comfortable. If you're gon na be an HVAC, you can't really be afraid of heights.

That's kinda mean I'm sure you could, but that's something you're gon na have to work with things like that. So um, let's see what else we got going on in here. Let me see: okay uh, I'm just trying to get here and mix and just try not to miss. Like I'd mentioned before, okay cool yeah, I am gon na cover that bill.

Let me see what else. Let me see what in this and what do I think about okay, so Corey Taylor, I just kind of went up here, guys, I'm not gon na go any further than this comments of repost. If I missed your questions, what do I think of the chefs uh? I call chefs - I don't know if that's the right way to say that I think I struggled with that last time. Just like any certification, I think any certification is better than none.

The Ceph says. Certification is it's another test? Okay, some people are good at taking tests. Some people aren't, it doesn't necessarily mean you're the best technician in the world, but it does mean that you took the time to study and take a test. So I definitely think the steps of certification is a good thing.

Okay, I do know of people that have that, and I do know of service companies that are SEFs a service companies. I hope I'm saying that right, but um yeah, I just like anything like I'm an eighth certification. You know I have a couple different Nate certs. It doesn't mean that I'm the best technician in the world.

Okay, it just means that I was able to pass a test, but the cool thing about Nate and sefa, and I can't think of the ESCO, certifications and different ones that they have is, is that most of them require that you continuing education hours and that's something That I'm big on you know it's not so much that you pass the test. It's that to maintain your certification. You have to go to continuing education classes, basically throughout the year and continue to learn. So that's the biggest thing for me is: is that you're willing to make a commitment to maintain a certification that requires you to continue your education? That is a big thing for me.

As a you know, business owner, you know for a technician for someone, that's willing to say that they're gon na you know put out this much time to learn new stuff every year. That's that's great! So, alright, okay, so bill! You said: how do you turn off the auto bypass on those VFDs? Okay, guys, I'm gon na go into this right now. So if I miss any more questions after this, we're gon na have to repost them in there. Okay, because I don't want to get lost in the chat, so I'm gon na go ahead and start talking about the VFD on the linux unit.

So, first off, let's talk about why we have especially it's it's spreading across the United States, but why do we have VFDs on majority of our packaged units here in Southern California or even split systems? Okay, basically, it's anything over. I think it's 2000 CFM's. I think it's a 5 ton unit. Basically, what we have to have is we have to have a two-speed blow or a sync.

I think it really applies to units that are two-stage really, but we have to have a two-stage blower. Ok, most of our units are three-phase so, instead of putting a single phase motor in there, what they do is they put in a three-phase indoor, blower motor and we put a VFD a VFD on the unit. Okay and what the VFD does. It essentially acts as a two-speed motor controller, so it's not really there to vary the motor speed up and down.

This is on typical packaged units. Okay, you can get into some industrial stuff and it may have a true VF d, but for us they typically run at two speeds. Okay, in the theory behind that is that if you have a two-stage unit, you have two compressors. Okay, we have a rule of thumb and it's kind of a very vague rule of thumb, but we kind of follow it here in Southern California because we have very dry air, but you use about 400 CFM s of airflow per ton of refrigeration.

Now that is a vague rule of thumb: okay, because that can vary all across the United States, but the concept behind what I'm explaining right now is still going to make it all make sense. So with that being said, if you have a compressor running and you load up that evaporator coil, the evaporator coil is potentially going to have condensation all over it when it has condensation all over it, it creates a static pressure drop across the coil, a bigger static Pressure drop, then, if the coil was dry. Okay, so therefore to still move the same amount of air, we need to speed up the blower. So what happens is when we turn on our second stage now that coil is going to get even more wet, okay and theoretically, the airflow is going to reduce, basically because the static pressure drop as the coil gets wetter and wetter is gon na go up.

Essentially. Okay, so what we do is on first stage we run the blower, usually like 30 or 40 Hertz, okay, whatever that is, and airflow wise, just to maintain the proper airflow for the single stage compressor and then, when the second stage comes on, they speed up via The VFD and move more air, okay, again it's trying to reduce the amount of waste because on older systems, we had a 10 ton package unit that have to 5 ton compressors. So, theoretically, we should be moving. What what is that 4,000 CFM severe right? I think if my math is correct, yeah, so 4,000 CFM severe well, we would because we didn't have a VFD on the unit or a two-speed drive.

We would have to run 4,000 CFM's, even if we were running just one stage. So it's just like a silly energy savings thing now. My personal opinion on the matter is, is that the VFDs are still a little bit too expensive and the failure rate is still a little bit too high they're not installed in the best perfect locations they, in my opinion, they really shouldn't be installed. Inside of a packaged unit, so you know - but that's I'm not here to so now with my particular Lennox unit that I made a video about when I talk to tech support, I just told him hey what what are things that would cause this drive to fail.

Other than someone pushing in the the bypass contactor - okay, because that's something that can happen - and I kind of explained it in my video - is that there's a second contact there and if you push that in you're, gon na send non modulated voltage. I guess modulated - or I don't know - if that's the right term for that, but to the motor that's having a modulator, it's it's just not good. It sends power to the wrong side of the drive, essentially through a back feed, and it can cause the drive itself to explode. So when I talk to tech support, they said really there's not much in there.

That's going to cause the drive to blow up and the unit does have phase protection, but that still wouldn't cause the drive to blow up either. So we kind of started talking when I was talking to the tech support guy and he just basically said you know what I like to do. Is he wanted me to go ahead and turn off the bypass feature, so that particular Linux unit? Not every single one has this, but that particular one is a higher-end unit and it has an auto bypass feature, meaning that if the unit itself recognizes that power is being sent to the VFD and power is not being sent to the motor, then what it'll do Is it's supposed to turn off power to the VFD and then bypass the VFD by pulling in another contactor and sending direct power to the motor okay? Well, the technician on the phone basically said that his opinion is is that we need to turn that automatic feature off, because he thought maybe that's what was causing these drives, to fail in the way that they've been failing and we have had a high failure rate Of the drives blowing apart, I thought that his logic there was pretty on you know. I thought it was a pretty good idea that he had, and so we went ahead and turned that off.

So what we did was we went into the prodigy control board. We went into the VFD settings and it literally just asked you: do you want the bypass to be auto or do you want the bypass to be manual, and so we just set the bypass to be manual inside the VFD Sethi I mean inside the The Prodigy Board settings: it was literally like four clicks and a you know hold down the inter button and we just basically turned the bypass to manual. So that was Lennox idea and I kind of am going with that. One and I'm probably gon na start doing that on every single Lennox.

You know that has that Auto bypass feature. So, let's see what else John Anderson do I mess with any residential wine chiller systems? No, unfortunately, I don't, but so right on huge bananas, interesting name there, but let's see what else explain a dual pressure: control, Corey Taylor. So dual pressure control there's nothing special to a dual pressure: control: okay, so on an air conditioning system or refrigeration system, we're gon na have a safety control on most systems, not all, but on most that's built into the unit that it can act as a couple. Different things, we're gon na have a low side pressure switch, which is essentially going to protect us from a loss of charge.

So if there was ever a giant leak and we lost all the refrigerant, what we don't want is for the compressor to keep pumping. After a long time of the compressor pumping air, we can create problems within the compressor. The compressor can overheat different things like that. Okay, so remember that our compressors, our refrigerant cooled, the oil can get contaminated different things like that.

So if we're not bringing refrigerant back to the compressor at the proper superheat, then we can have overheat issues. You can run into all kinds of problems, so we put a low pressure control in the system same thing. On the high side, you don't ever want the condenser fan motor to fail on the compressor to keep pumping, because the heat of friction builds up. The temperature inside the system and the pressures keep rising right because the temperature and the pressure correspond with each other.

So, instead of having two separate switches, we combine those two switches into one electronically inside of a dual pressure: control for the majority of them. The low side and the high side are essentially just wired in series, and you literally have two wire connections on the pressure control. Now there is some that have four wire connections, but that's a micro set control and that one's a little bit different, but the standard dual pressure control will typically have two connection points and if the the high side opens, then it basically opens the circuit and if The low side opens, you know it opens the circuit to so. It's really not much to a dual pressure.

Control works off of the the concept of a bellows inside the control hold on. This is an idea and an example of a bellows okay. This is not the same one, that's in a dual pressure control, but what this does is this allows refrigerant to come to one side and it applies mechanical force to the other side. So refrigerant, theoretically, could come in this side and then the mechanical force from the bellows contracting or pushing up you know, could close a switch open, a switch.

It could do anything now. This is out of a pressure regulating valve, but the same concept still exists. This is a bellows here and it basically just applies. You know refrigerant pressure and you know converts it to the other side to a mechanical force that doesn't let the refrigerant interact with the electrical switch okay.

So this just applies the pressure and you could just see. I'm just squeezing it down so as the pressure it will expand as the pressure increases, or you know different things like that, so this is just a bellows and these are inside of a pressure. So this is would be you know, high-pressure would be coming in and basically pushing up and you know could do the same thing on the low side too. So it's the same concept.

This isn't the exact thing that would be inside of there, but it's the concept of using the bellows to apply refrigerant pressure on one side and mechanical on the other to where they don't mix. There's also different types of pressure controls, there's small little Pete. What we call peanut pressure controls those ones just twist on to a refrigeration system, so hopefully that helps you there bud. Let's see what we got going in here Abe.

You asked if I can show a video working on co2. Unfortunately, I don't work on co2 systems, so there's not really anything. I can help you with, but LSX moe. How much footage do I capture on a daily basis and roughly how much of it is actually used? That's a really good question.

I actually capture a lot of footage on a daily basis and I would say if I capture on average, if I film every day of the week, I can probably use two to three days of footage. You know, sometimes you start filming and then you go downstairs to finish. Filming and the restaurants got music playing and I've got footage where I've got music in the background, and I can't put that on YouTube because I'll get a copyright strike. So some of it I've thought: hey, I'm gon na go over there and narrate through the video, but it's just so much work when you have like a 40 minute video and then you got to stop and narrate to try to make hand, movements and different things Match up it's just kind of not enjoyable, so I do have a lot of unused footage other times.

You know I start filming and then things get crazy and I just can't pick up the camera to finish so yeah it's. I definitely have a lot of unused footage and unusable footage. Basically, so it's a very common thing that I run into let's see have I worked with inverter AC units. Yeah I've worked with a few.

I really got nothing bad to say about them. Yet so, let's see, let's see what else okay cool, so I'm gon na go ahead and get to a couple more things. I have on my list here. So the next thing was it.

I think it was her nest. Oh, that asked me hvac our vlogger. I don't know if you're in here, but but i know you would ask me a question about how i got a hold the technical support in the short amount of time. So technical supports another thing: if you are dealing with restaurants, refrigeration technical support can be a chore.

Sometimes i do lean on the manufacturers for help. When i need help. Okay, i'm not all-knowing. So yes, when i want to try to figure out, you know pick the manufacturers brain on a certain problem that i'm having you out give them a call.

Different manufacturers are better at answering the phones. I deal with one of the more pleasant ones that i deal with actually is delfield their refrigerator manufacturer. I deal with them quite often, and i get through usually pretty quick. Occasionally things can get crazy.

What you need to know is you need to know the right times to call. I can tell you that let's see 10 a.m. East Coast time 7:00 a.m. West Coast time is the worst time to call technical support, because the entire country is usually calling them on a Monday Bay, or, I should have said on a Monday.

Okay, that's the worst time because people usually have problems over the weekend. Hvac are north dude thanks very much man. I really appreciate it. I wasn't going to say they're sorry, I lost my train of thought there, but um yeah, it just depends.

Every you know. Different days of the week are better to get a hold of them, but one of the things that you need to learn when you're dealing with restaurants - and this goes to you, ernesto hvac. Our vlogger is um because he deals with a lot of the same restaurant chains that i do. We don't talk about them in public forms and different like things like that, but i can tell from the restaurants he's working at and I know he can tell from the restaurants I'm working out that we work at a lot of the same chains and some of You other guys that are in here made.

I choose on a side. Note guys I choose, I don't mention the chain names or the restaurant names that I work in, because I want to protect the identities of the restaurant. We don't want to cause any problems. I don't know anybody getting angry okay, so when you guys try to guess restaurant names in the comments, I just delete those comments because I don't want to mention any restaurant names, even when you guys guess the wrong restaurants.

I delete those too, but one of the things that you need to learn is when you're working with chain - restaurants, especially a lot of them, have national accounts. For instance, majority of my chain, restaurants, have a national account with Lennox. Lennox, basically makes an agreement with them. They sell direct, which I don't agree with, but it's one of those things you can't control, but as part of the thing with them selling direct, they have a special phone number that we get to call often times not always but often times.

The national accounts. Technical support phone numbers will get us through a lot faster same thing with it just depends on who you're working with in different restaurants. If you happen to be a warranty representative for Manitowoc ice machines, you can get through a lot faster. I am NOT a warranty representative, but you know just depends, so you just got to kind of learn which national accounts or which restaurants have national accounts oftentimes to when they have national accounts.

They usually have discounted pricing too, so you can actually get things at different pricing and different stuff like that. So let's see what else we got on the chat here that I'm missing. Oh, you know what I can turn these on. Oh quick, let's go and there's that, hopefully, that I turned on the movie quote that I'm gon na put in here.

Hopefully it doesn't bombard you guys all with I don't I don't understand how Knight but puts these movie quotes in here. So let's hope it doesn't. In order, how often do i work with systems using glycol chillers? Well, I work on the tiny glycol units. I don't work on the big giant, actual industrial chillers, but yeah.

I work on beverage systems like beer, power, packs and different things like that. They use glycol and they circulate glycol over. You know line runs and they cool down the beer line. So I work with those quite often I'd, say, probably about once a month, I'm working on a glycol unit for like a beer chilling system or something like that.

Let's see, we have those same numbers for ice: okay, yeah, I yeah see they're an ester yeah yeah, so certain that the chains that we work in but there's there's a bunch of them. You can message me privately and we could talk about it a little bit more so could I possibly explain pumping a system down to make TXV repairs on the fly? Yeah sure, Frank Bradley, so the concept is. Is that hold on one? Second, I don't happen to have a king valve here with me, but we have a visualization of a receiver so on the top of this receiver, we're typically going to have a king valve and that's a shutoff valve so on a system now even on a residential Air conditioning system that condense are kind of acts as a receiver as long as it's not a microchannel. If it has a micro channel condenser, you need to be very careful about trying to pump it down, especially with 410, a be very cautious.

Most people advise you not even to try it okay, so you need to be very careful if a microchannel system was overcharged on a residential unit and you tried to pump it down, you could have some issues with the condenser exploding. People getting hurt things like that. Not like fireball exploding, but you know, lines blowing out and different things like that. So you want to be very cautious about pumping down a system, but on a refrigeration system we have a receiver.

This is a receiver right here. It's missing the top, but we would have a king valve. So the theory is is that if I shut off this king valve this receiver is meant to act as a storage tank. So the compressor will continue to run until the low side gets low enough.

That the pressure control the low side, pressure control cuts the compressor off okay, the valves in the compressor you have one that draws and one that pumps you have a high side and a low side valve. So as you're drawing refrigerant from the low side. It's pumping it via Pistons, okay or if it's a scroll compressor via the scroll mechanism, but you have a separation between high and low inside your compressor. So when the system's being pumped down, we close down the liquid line coming out of the receiver or at the king valve, and the system continues to pump and what it does is it stores all the refrigerant in the condenser and the receiver and then the low Side goes lower and lower and lower until the low side pressure control cuts it off.

When that happens, we make sure that our valve is closed on the receiver, nice and tight. We can turn off the compressor and you could let the residual vapor that's in the low side out of the low side, and then you could work on everything. That's on the low side of the system, once you do that everything on the other side of this valve going downstairs or going to your system if it's done right should theoretically be out of refrigerant. So you can open up that side of the system now and you can work on the evaporator coil and the expansion valve okay, so that is how pumping down a system works.

Hopefully that works for you and I can try to explain it. Maybe in a video that I make soon, I probably got videos where it explains pumping down too so hopefully that answers your question there, but all right, let's see what else we got just heard. I c'n is no longer for 10a r3 yeah. I've heard about some of those people getting rid of for 10a.

I think carriers doing that too right, they're going to that new, weird refrigerant. That's that's what I've heard yeah I've heard I can and Kerry are both doing it. So if Dyken doing that, that means that Goodman is gon na be going to it too soon and right because yeah they're the same thing right so who makes the best R to you, in my opinion, so HVAC kid as far as the best RT you, it Really is about it's really about what you're comfortable with okay, so I'm super comfortable with carrier package units with Lennox package units. So I therefore I find that I like to work on those better.

Ok, it's not that any of them is better than the other. I really don't care to work on York units, but I don't work on York that much so I imagine if I worked on more York units and I would be more comfortable with them, so you know it's kind of a hard thing to say which one's better, But which one do I like working on the most I like working on the Linux unit, the most so, let's see, if it has a micro channel, use a grenade to clear the points. Yeah that sounds about right. Yeah just go ahead and move it on out any tips on diagnosing a reversing valve, not really something I can tell you over the livestream there, Sam so feel free to send me an email.

I can try to get back with you, I'm a little behind on my emails right now, but I'm trying to catch up with them, so, let's file at Kyle. So as far as a hot swap yeah, that's an interesting thing. So a hot swap is something that you have to decide whether or not is de minimis loss. Okay, so you know the EPA defines de minimis law says: you've done everything you can to make sure that you've recovered all the refrigerant out of the system.

There's always going to be a little residual refrigerant, okay, I guess it would be an argument in court on whether not a hot-swap would be a de minimis loss case. Okay, so, but basically what you can do is you can pump down a system, and this is a very common thing. We and I would argue that it is de minimis loss. If you do it right, but you pump down a system to a very low pressure.

Usually, like 3 to 4 psi, and if you change the power head really quick, the amount of refrigerant that you lose is so minimal. It's not even funny and I'd even argue that the amount of refrigerant, if you do a hot swap right, that's where you change the power head under a very low pressure that you would vent more refrigerant. When you put your vacuum pump on the system and try to properly evacuate the system, then I would of doing a hot swap. That's my opinion.

Ok, but I'm not talking gas pissing out everywhere and you're trying to screw it on. That's you know venting refrigerant, but if you do a hot swap down to like you, know, 4 psi something like that and then just have everything ready and swap the power head really quick. I can do it in like 4 seconds. 1.

2. 3. 4. You know just twist that thing on and be done.

The amount of refrigerant, in my opinion, that I've lost is less than if I would have opened up the system to atmosphere and evacuated the system, because when you evacuate the system, you're venting refrigerant out of the system, you've got air in there too, but you're pulling Refrigerant out of the oil - and you know, you're you're blowing it out so yeah. That's that's an argument that one can make on that one. So so I only do commercial yeah. I don't do any residential air conditioning commercial.

Restaurants is all I do. Ok, so Frank yeah, so hopefully I understand that in what I said, but yeah, basically, I'm just gon na pump the system down to a low pressure, get everything ready, unscrew the power head, screw the power head back on under really low pressure. So hopefully I think I just explained majority of it there. Let's see, why do I recover with a cylinder inverted through the vapor port Sean, so I'm kind of like a silly person that saw something on the internet and it makes sense to me so a p on the the recovery machine manufacturer, okay, and they also make The fat recovery hoses and different things they had put out, like a tech tip about speeding up the recovery process and a couple of the things we're taking out the Schrader ports different things like that.

You got to remember that a pion was one of the first people to really be pushed not on social media. I know it's always been a thing, but a peon really made it publicly known that taking out the charade report speeds up the recovery process, not evacuating through a manifold set speeds up. The recovery process and another thing that they put out on a tech tip was recovering into the vapor port of your vacuum cylinder and unfortunately I don't have a picture of it. But if you take a recovery, cylinder room and unscrew the valve assembly from the top of the recovery cylinder, what you're gon na find is that the liquid port has a very small dip tube, that's smaller than a quarter inch ID, it's very small and it's very Restrictive and that dip tube on a 30-pound recovery cylinder is about 18 to 20 inches long.

So if you're pumping liquid into the quarter inch port on the on the liquid, you know port on the receiver tank or a recovery tank, then it's gon na have to go through that very small diameter. It's something like 3/16 of an inch or something like that, and that in theory, is a restriction. So a peon had put out a thing that if you pump refrigerant into the vapor port, there's no restriction and it's just an open flow into the tank. And then just invert, the tank and you know pump it in that way, and so the refrigerant will just build up in the tank.

So that's the process and the theory behind inverting my tank now, whether it scientifically makes it go faster. I don't know, but when I pull the part of recovery cylinder and looked at the restriction that was inside of there, I was kind of like yeah. This makes sense that flipping over the tank and pushing into the vapor port would speed it up. So I tend to do it that way.

I really don't ever have to use those sub coolers when I'm recovering refrigerant. I just will invert my tank put it in ice. Water use 3/8 inch hoses and go to town. So um, let's see what else, can you explain again our 290? What about our to 90? Do you want to hear Tom give me some questions and I'll try to answer it as much as possible.

Adam, you said a hail air conditioner unit and the compressor is very loud. You put oil in it and it gets louder. It's a 20 year old unit. What do you think? Pressures are 180.

10, 180, 10. First off the pressures don't mean much to me, but at kind of desks had 10 psi low side pressure. You got a problem there, but you need to figure out. What's going on, I'm not gon na give you the answer.

But if you look at your vapor saturation temperature, it should tell you everything your vapor saturation temperature on the low side should not be or the Veit. You know the pret. The low side pressure should not be a 10 psi, so you've got a problem there. Something is restricting the refrigerant you've got a blower motor, not working something's, going on okay.

So I can't really help you over a live stream, but you got an issue. Have I ever worked on Hussman refrigerator/freezer units? I've worked on some Hussman like fish cases like static fish cases that did not have fan motors and I've worked on the fish cases that had fan motors, but I've never worked on a refrigerator/freezer through Hussman. Let's see is there any system that I wish? I had more opportunity to work on gain experience with yeah I'd love to learn how to work on chillers industrial side, but unfortunately it's not something that my company's ever gon na pursue because yeah it's just it's it's too difficult to jump into that field, not knowing What we're doing so we're just staying in the restaurant side. Let's see, am i a licensed electrician or is HVAC a gray area involving both Scott Savage, so HVAC is a gray area that involves plumbing electrical and air conditioning and oh yeah, plumbing electrical and air conditioning.

We deal with gas pipes, we deal with electrical, you know, there's there's a fine line between I'm, I'm really allowed to do my electrical. It is a real gray area. I'm allowed to do electrical pertaining to my units. Okay, the gray area is once I start installing breakers in a panel.

That's a little gray. You know whether or not I'm allowed to install a breaker. You know you do technically have to have a separate contractors license to be an electrician. I do not have an electrical contractor's license.

Actually I should say we do not. I am NOT the license holder of the company. My dad is but uh I'm gon na have to get my license eventually because he's retiring but anyways that's a whole other thing but yeah. So it's, it is a big gray area in the air conditioning and refrigeration side, because we we do the work of a lot of people a lot of times.

We have to be carpenters and we're framing stuff out on the residential side. You know we learn how to work with metal electricity, refrigeration plumbing. We do a little bit of everything, roofers all kinds of stuff. So, let's see do I ever reuse recovered refrigerant, yeah.

In the same system, EPA losses you're not allowed to use recovered refrigerant. Unless you put it back into the same system on the same location so yeah, I do use it in the same system. If I, if I have clean refrigerant that I just had to pull out to change a compressor that wasn't burnt out, then yeah I'll put the refrigerant back in definitely do I use the same precautions with our 600 as you do our 290 yeah. You definitely would because our 600 is a flammable refrigerant, so you would definitely want to use yeah the same precautions purging with nitrogen, that kind of stuff for sure, let's see our 290, what applications do I find it? The most I find our 290, the most in refrigeration systems.

I work on the you know: restaurant refrigeration, so pretty much. Every new refrigerator, they're installing in the restaurants, is becoming our 290. So let's see what else, which are better reciprocating or scroll compressors. That's a that's! A loaded question: I believe that they say scroll compressors are more efficient than a reciprocating compressor, but I find that with scroll compressors we tend to have more overheat issues.

We tend to have more well. Definitely, moreover, he issues scroll, compressors, don't like to pump down. So there's Goods and Bad's to both okay. I prefer an old piston, driven, hermetically sealed compressor or even a semi-hermetic, even better, but semi-hermetic SAR so expensive and so heavy cool thing about semi.

Here medics was, you can change a valve plate on him super easy when you had week valve so you were rarely changing a compressor. Unless you had a burnout, would I explain how to check the prow of the recover to refill 80 % with heat source and what kind of heat source Abe they had? That's that's the loaded question, but you don't check a recovery cylinder with a heat source. That's not how you do it if you want to fill a recovery cylinder. What need to do is you need to calculate the amount of refrigerant that you can put into the system based off at the type of refrigerant? So you need to talk to the manufacturer of that tank or there's some charts on the internet that explain how much of a certain refrigerant a 30-pound which again you need to be careful, because just because you call it a thirty pound tank majority of 30 pound Recovery tanks are actually twenty six pound tanks.

This is where you know. If you go ahead and get your EPA certification, it explains how to figure out the proper process to fill a recovery tank. Okay, I don't highly suggest that you don't try filling a recovery tank with refrigerant unless you're, properly trained and certified, because nobody wants you to get hurt. If you overfill a tank, it can lead to an explosion.

You can get hurt different things like that, so you want to be very, very careful. Let's see what else we got just trying to go through your guys's questions here. So what do I do with the full cylinder of contaminated recovered refrigerant I'll? Just simply when I have a recovery fee that I charge the customer when I when I recover - and I just go ahead and take the risk, the cylinder back to the supply house and the supply house disposes of it for me. So they take it back to a manufacturer.

There's several different manufacturers that clean and refine refrigerant and they'll, recycle it and then they'll resell it. So that's typically what happens so when I go to a customer and I have a system that lets just say burnt refrigerant. What I do is, is I just go ahead and let my supplier know: hey. I've got contaminated refrigerant, they charge me a nominal fee for the contaminated refrigerant and they dispose of it.

If it's not contaminated, I still take it back to them. They charge me a fee and they dispose of it. There is some supply houses out there too. That will give you some money back if you try to bring them back like r22 refrigerant different things like that, so there's different programs.

You can use. Let's see what else yeah our 290 is all over delfield. True, almost all manufacturers. So do I work on chiller and cooling towers? No, I don't so.

Let's see your your message is repeating itself bill. I haven't seen your message there, but what's it say? Okay, let's see what else hey there Ted, how you doing, but is an old, keep right, condensing unit Jeff Sutherland. I don't know what you're saying there am. I missing part of a comment: let's see what else we got going on? Okay, so Molly you're trained unit pressures are 150 over 20.

The vapor saturation temperature is 68 degrees Fahrenheit. I replaced the expansion valve blower motor and the condenser still as it uses hcfc refrigerant. I can assure you Molly that the vapor saturation of 20 psi r22 is not 68 degrees Fahrenheit. So something is wrong there.

If your r22, I'm looking at a pressure, chart right now, if your r22 is at 20 psi, your vapor saturation temperature is negative 5. With those pressures on a residential air conditioning system. You have got a low pressure problem. Something is wrong yeah.

I definitely got something wrong there. Let's see what else is a keep right, condensing unit, any good sure keep right does make a decent unit. I don't work on a lot of keep right equipment, but I've come across it a few times and, yes, I do find that it's pretty decent equipment, so other people may have something different to say about it, but yeah everything that I've come across with keeprite has Been fairly decent, I tend to see keeprite equipment in convenience stores, case doors, different things like that, and then I know that they have higher-end lines. I believe they do some supermarket stuff and things like that.

Hey thanks, Ralph, really appreciate the super chat man. Thank you guys. I I think I saw another super chat come through here too, that I missed. I really appreciate it guys.

It's really cool of you. Thank you. Thank you. Let's see what else pros and cons to working on restaurant equipment, the pros know.

That's that's a really hard question. A lot of people. Don't like restaurant, I'm gon na start with the cons. The cons are it's greasy you're working in small spaces.

Kitchens can be very crowded and very busy at times, so it can be a little bit stressful. I enjoy it because that's all I've ever done. I've always worked in restaurants. So it's just something that you know I'm used to.

I get to work on all kinds of different stuff. You know one day, I'm working on an exhaust fan later that day, I'm working on an ice machine, a walk-in cooler and air conditioner different kinds of problems. You know, but then there's also some repetitive problems. You know you get water damage problems where restaurants are cleaning their floors at night and they're, getting their new equipment wet and it shorts out the circuit boards and different things inside of it.

So you get to investigate a lot of things and you get to troubleshoot. Some interesting stuff trying to figure out in your head what someone might have done when you have a consistent water damage problem that keeps happening on a unit. Now? What are the good things about? Working in restaurants? I mean some people say you get access to free food. I you know, I don't know about that.

I really don't encourage my guys to take free food, but I do know that restaurants do offer it a lot. I personally don't eat the food a lot because I used to eat it a lot and I just realized I got burnt out on restaurant food. Other good things about restaurants. I don't know that's that's kind of an interesting question.

I'll have to think about it. Some more, you know one of the things that kind of stinks about. Restaurants, too, is you know the hours you do have to work some crazy hours? Sometimes there's more companies out there that do this than I do. We typically don't work overnight things, although, ironically, I have to do a late night system thing tonight, where I got to go out at nine o'clock at night and do a pump down on a system because they're replacing a cooks line in a restaurant.

But I shouldn't be there too long, but you know, depending on the service company you're working for some companies do night work a lot, so it just really depends, but with restaurants yeah, they typically want you to be a 24-hour service company. I guess one of the benefits to restaurants is: is you have consistent work pretty much a year-round for the most part if you're working for a good company, you're gon na be pretty busy, there's gon na be service, calls that come in refrigeration, air conditioning and ice Machines all year, long you're, definitely gon na get an influx of service calls in the summertime and it's gon na get busy. But during the wintertime for the most part, you're still gon na stay pretty busy, you know. So that's definitely the one benefit for sure from restaurants is them for the most part, keep you pretty busy.

So, let's see what else did I ever struggle with deciding which tools to put in my bag? Yeah, I mean you know, figuring out which, which tools to put in my bag yeah that that took me some time to figure that out, I'm very particular about the tools that I keep in my bag. So it's taking me, you know, years of working and realizing like hey. I use this tool oftentimes and I tend to repurpose tools, so I probably make people cringe when I pull out my set of channel locks and I use it as a hammer because I do. I personally don't buy like Kinetics tools, because I use my channel locks as a hammer and I don't want to beat on a set of Kinetics channel locks and ruin them right because those are you know, hundred-dollar channel locks when I can go, buy some $ 20.00 Cline's from Home Depot same thing with my lineman pliers, those end up being a hammer for me to.

I used my lineman pliers to cut big wire and to use as a hammer majority of the time. So I do repurpose a lot of my tools in my tool. Bag. You know, keep right.

Yeah carrier basically bought a bunch of manufacturers. They bought Russell Russell refrigeration too. So carrier has a bunch of manufacturers under their umbrella now or United Technologies. I think is the umbrella, so, let's see what else am I missing here worked on my okay, so you said you worked on your first pneumatic system, Kyle yeah.

I don't think I've ever worked on pneumatic systems. I've seen them, but I've never worked on one. So all right, let me see what else I got on my my sheet of stuff to cover I'll definitely try to get to you guys's questions, if I miss them, throw them down in caps-lock again and I'll. Try to address him things that I want to talk about.

We talked a little bit about technical support. Earlier I saw ernesto hvac. Our vlogger had asked me about how I got through to lennox technical support, because he tends to wait on hold for a long time, and you know just depends different manufacturers. I had mentioned in the stream for those that just came in, that a lot of manufacturers sell national accounts to the restaurant chain.

So when some of the restaurants that I work on in some big chains and they have national accounts, so I usually have a special phone number. I can call to get usually through to tech support a little bit faster. But sometimes you don't so, but one of the things I want to talk about with technical support is is to be prepared. Okay, because you're gon na sit on the phone for, however long right so have your list of stuff filled out before you call tech support.

If you have that list of stuff filled out, then a lot of times, you're gon na figure out your problem before you get on the phone with them, but when you do get on the phone with them, you have everything prepared. Take your pressures. Take your superheat! Your subcooling, you know your temperatures, whatever you're working on your cutting and cut out your voltage. Is your amp drawers different things like that and have it all written down.

So when you finally do get on the phone with tech support, you're ready, you know you're on it and you get your stuff done. You know and also it helps to write all that stuff down because sometimes like, for instance, Manitowoc ice machine tech support. You call them and they're gon na call you four and a half hours later, when you're on your way home. That's how it always works.

You put in a phone call, it's a call center. You tell them your problem, the model and serial number, your company name, and if you aren't a preferred warranty provider, then you're gon na wait a little while so oftentimes. In my experience, they call you back when you're driving home.