Hello, how you guys doing - hopefully you guys are doing well Justin, Raman Schneider, you got it correct, it was from smash. So hopefully I don't get a copyright strike for that. I was kind of curious because it's not music, but I don't know we'll see we'll see how it goes. I'm kind of not in the mood where I really don't care so see.

If I can do this, my way so got all kinds of stuff I want to talk about today, as I was doing, setting everything up, I kind of had this idea. I was gon na do like an intro or something like that, and then I remembered that intro from the smash album from offspring and it was kind of like what I was trying to replicate. So I figured I'd just play it so, but hopefully you guys are all doing well. Hopefully you guys can hear me well go ahead and indulge if you guys can, let's see I'm pouring myself a drink right now.

Mr. Johnny boy, that is an amazing super chat. Thank you very much. I really appreciate it.

Hey, I'm not really good at acknowledging people. You know like, for instance, I have patrons or page. I don't know what you call people that that donate to you through patreon. I think it's called patrons and every once in a while, I look at it.

I set up a patreon a long time ago and because someone actually asked me to set it up and I kind of felt weird but anyways. I just want to say thanks to the people that do donate, whatever way that you guys can. I I'm gon na address something right now too, but thanks so much. I don't necessarily shout you guys out, and I probably need to do a better job of doing so and I'll probably try to work on that for you guys.

But thank you guys very much for those of you that have donated through patreon or super chats or whatever it's. It's super awesome that you guys take your hard-earned money and give it to me. I realize that I'm giving you guys something, but to me it just feels like I'm sharing something that kind of should be free anyways, which is knowledge right, because, yes, we have to work to obtain knowledge, but knowledge helps everybody and I'll get into my little thing. Right now but yeah it is apple juice right.

It's a Oktoberfest apple juice tonight, so you know it's the season right, tis the season or something like that. Maybe that's not the right thing to say, but uh yeah, whatever tis the season, so but it's foamy apple juice too, but um. Lately, I've been like in a funk. I don't know if it's like a seasonal thing.

I think it is and there's something too for those guys that make videos Zach. I know you're in here. I don't know if you're still in here right now you probably get in this too, but right now I found myself getting really. I have I battle like depression and different things like that.

That's a whole nother thing, I'm not gon na go into that in this stream, but I've been obsessed with the numbers lately and I realized that I need to stop the numbers really. Don't matter my wife. I was talking to my wife as I was driving today and I was just telling her like I feel like I'm in a funk. You know like I.

I didn't release a video today and cuz last night I was, I was just thinking about it. I just wasn't in the mood to make a video and it's just because of I being kind of in a funk. But I'm super obsessed with the numbers, and I need to stop. I'm almost tempted to go ahead and delete the YouTube studio, which is the app that we use to like pay attention to the comments and the views and all that different stuff, because I find myself looking at it, you know multiple times a day I mean stupid Amounts just staring at the numbers and I need to stop because my wife reminded me she said: look, she goes.

You didn't start these videos because of the viewers and the subscribers, because when I started these videos, I had no viewers and no subscribers, and I was just trying to start for my own employees and I need to get back to that. It's really easy to kind of veer off and start getting obsessed with the numbers, and I need to stop so anyways. I don't know why. I told you guys that, but whatever so, I have a couple things I want to talk about tonight.

Lots of questions that I want to address. I definitely want to get to you guys's questions in the chat. I've also got a new you guys these super chats. So thank thank you.

So very much. It's really really awesome. I really appreciate it. You guys are awesome.

I'm gon na continue to do these super chats or not, because that's not why I started doing these videos, but it does help. So thank you very much. Okay, take a break. I am gon na.

Take a break, I'm actually work permitting I'm gon na get away. This weekend we're gon na go up to Mammoth Lakes. My wife got Friday off she's a waitress, so anyway, she got Friday off and we're gon na take probably take the kids out of school early. I'm gon na try to take off work early and we're gon na get away for two days.

It's not a lot, but we're gon na go up to Mammoth Lakes, which is like a super chill mountain community. There's no snow up there. Anything like that. It's a ski community or whatever, but we're gon na try to get up there just for two days or one day or whatever.

It is we're gon na drive up Friday afternoon and just try to relax detox for a little while breathe some mountain air get away from this craziness. So, like I said, I got a lot of stuff. I want to address and again thank you guys very much. I really appreciate it for those of you that deal with it.

I'm gon na I'm gon na just talk about it really quick. I don't want to bog these streams down with like sad and all that different stuff, but for those of you that deal with depression anxiety, all those different things, it's real. I think we need to talk about it a little bit more. I think that people need to not be so secretive about that kind of stuff, because it does affect a lot of people and it's very important that we talk about that kind of stuff, because I'm not dark or anything like that.

I'm not going anywhere bad. It's just one of those things. I think it's just a seasonal thing, but everybody you guys need to talk about that stuff. Okay, you know it talked to your spouse's, your friends, your family, whatever it is, just talk to them so right on okay.

So, let's get to real stuff one of the questions that I had and I'm gon na address some stuff with the last video that I uploaded too. But one of the questions that I wanted to address was I had a viewer named Brandon that had asked me about checking super heat on a freezer unit and his question was: can you check super heat when you're evaporators frost it up and his logic was pretty Smart, he said: look, he goes Supermarket systems are always frosted up. He goes so I'm curious. His question was about checking superheat when there's frost on the coil, so my answer to Brandon's question is that you need to be very cautious about checking superheat.

Yes, it is natural on a freezer coil that there is going to be frost so long as the frost is not obstructing the airflow. Remember that your evaporator coil is taking the refrigerant and it's absorbing the heat from the box. So it is normal for there to be frost on a freezer coil. But at some point, that frost is going to become so thick that it's going to slow down the airflow and the evaporator is no longer going to absorb as much heat as it could.

Okay, remember that ice and frost typically is 32 degrees. So once you get enough frost on that coil, it starts to act as an insulator and it keeps that evaporator coil at you know around 32 degrees, because that's at what point ice freezes. So once you get so much ice on there and it starts to build up a block, then yes, it's going to obstruct the airflow and it's going to cause some issues. So you need to be careful about that.

It's a fine line! Okay, so I typically don't like to check superheat when a coil is frosted up, so in a perfect world. What I would suggest you do is if you do have a frost situation. Of course, they tell you to check superheat when the box is near or at temperature. So what I suggest is let the box come down close to temperature.

Put the unit into a defrost, then turn it back on after the defrost. Let it come down a little bit more than check the superheat. I know it's not always practical, okay, but on a freezer system on an initial pulldown, you'll tend to have frost, build up on the evaporator coil okay. So it's important to go ahead and get rid of that frost, so throw it into a quick defrost once it's out of the defrost, let it run for 10 minutes, it'll, probably be close to boxed and then check your superheat okay Brandon.

So hopefully that answers your question and we'll get to some more these other ones, Evan dude. Thank you very much. I really appreciate it. You guys these super chats are awesome.

Thank you, so very much. Okay. I've got a new movie quote in there today for the night Bart. I don't know if it's popped it in yet, let's see, no, it doesn't okay, so it doesn't.

Look like the nightbot is popped in the movie quote. Yet this movie is going to be a very obscure movie. You kind of got to have a perverted sense of humor if you've watched this movie. Okay, so let's see, if you guys, can guess it'll pop it in sometime during the stream.

I think I have it set to like 28 minutes or something like that and there's or quotes it's kind of a difficult one. I'd be kind of curious. If any of you have ever seen this movie or know what the movie is so pay attention to the night BOTS comments once it comes in okay, I will definitely try to get to your guys's questions in the comments section too. So do me a favor and put your questions in caps lock and myself, and just in the moderator will try to pay attention to your questions.

Don't hesitate to repost your questions if I don't answer them. Okay, even if I can't answer them I'll, usually address it and say: hey, I'm not gon na answer it during this stream or something so you're, not gon na hurt our feelings. If you post a question two times, okay, all right, let's see what else we got in here. Let's see, okay, another good thing.

Okay, so I had a video that I posted about a like one of those epic service calls again where it turned into a disaster. It was, they called me, the restaurant. They said multiple regions were down when I usually that means multiple regions aren't down. We get that a lot.

Then we go out there and it actually was multiple regions down. We had multiple issues, refrigerant leaks, compressor issues, all kinds of stuff inevitably ended up having to repair a leak and change a compressor. It was a headache you guys can watch the video. I'm not gon na cover the whole thing inside of here, but one of the really important things that I want to cover - and I have it on my bullet list right here - that I want to talk about - is pulling a perfect vacuum.

Okay, remember when we are servicing equipment, there's, there's installation, new installation and their service. Okay, it's very difficult to pull a perfect vacuum on a system that you're servicing so that so it's been operating for many years. You repair a leak. You know, especially when you have multiplex system and a multiplex is basically you have multiple evaporators, with multiple circuits with one or a single system controlling it.

It may not necessarily be one compressor. You may have tandem, compressors or triple compressors, who knows, but you have multiple evaporators, multiple circuits, multiple circuits, meaning multiple temperature controllers, multiple solenoid valve shutting the systems off on systems like that. We have refrigerant leaks all the time. Okay, refrigerant leaks are a natural thing.

They happen pulling a perfect vacuum servicing a system, that's multiplexed is not obtainable, usually okay, most systems, and that's just something that happens with refrigerants. That's why the EPA and all those fancy police people whatever are trying to get rid of refrigerants. That are, you know, quote-unquote hazardous to our the environment and all that good stuff, whatever you believe for global warming, BS all that, whatever okay, I'm not gon na get political, but so pulling a vacuum on a system. That's multiplex is very difficult.

Okay, especially if you're doing a pump down so in my situation, I pump the system down. So that means, while it was running, I front seated the king valve on the receiver, so that stopped the refrigerant flow coming out of the receiver and it basically just pulled all the refrigerant out of the low side of the system. And then I'm able to work on the low side of the system. Well in that situation, I repaired my leak, but I was pretty confident that I still had leaks in the system and it's not always possible that we get to fix systems like that.

Okay, you've got multiple leaks; you may not solve them all. It's just life, sometimes systems leaks at this point in time. In the United States it is not illegal to repair a system that has refrigerant leak so long as it doesn't contain more than I think the number is 50 pounds of refrigerant or something like that once it contains over a certain threshold, then yes, you have to Document and repair the leaks and all that you have to make an effort to repair the leaks and all that good stuff. But on a system, that's small, you know it is what it is and you just got to do what you got to do to get the customer going.

They have multiple systems. You got to get them running so you're, not necessarily always gon na pull the perfect vacuum. I try as hard as I can to pull a proper vacuum, but sometimes you can sometimes you just got to pull it down and get most of the air out of the system and started back up. What does that lead to that leads to low compressor life? That leads to moisture issues that leads to all kinds of stuff.

Okay, but those are things we battle all the time. It's very interesting because on the supermarket side, they deal with that kind of stuff all the time. Okay, there's always leaks on systems and different things. Like that, they have to try to fix them as much as possible because they have systems that contain large amounts of refrigerant.

But you know, there's always gon na be leaks in our system. You're, never gon na have a completely leak free. So when you're trying to pull a vacuum, you want to do your best. You want to put your best effort out there.

You want to try as hard as you can to make sure that systems are operating properly, even when, like, for instance, even when you know that the system still has leaks, you want to do your best. Okay, you want to pull a vacuum. Don't don't be one of those guys that just blows and goes you know just opens up the valve purges out the system, you know and then it just lets it run. You know you do your best, okay, but also at the same time, if your system has leaks and you're pulling a vacuum at some point, you're gon na pull air into the system, so you kind of have to it is kind of a gamble to figure out When that number is you know, so I am NOT a perfect technician.

I make mistakes. I have to deal with customers, time constraints, all kinds of stuff. Okay, so understand that my videos are, you know I don't know, they're necessarily meant to be educational. I know you guys take them as educational, but I mean it's more of a.

This is how I do things remember that my videos really in essence, are for my employees and I share them with you guys too. So that way, you guys can see how I do things. Okay, so again, I'm not the perfect technician, but I do the best that I can so all right. We adjusted that so are we addressed that I should say: okay, so Bryce.

Kerschen burg, you ask. Does the 25 to 30 degrees above head pressure, rule of thumb work on all refrigerants? It's not the refrigerant okay! So I'm assuming because you're saying 25 to 30 degrees. Above head pressure, I'm assuming that you're talking condensing temp over ambient okay, and that is a rule of thumb that we use estimating what our condensing temp a so it's condensing tip over ambient. So if you a by rule of thumb, if you have a hundred degree, ambient temperature, theoretically, your condensing temperature, so that really depends on the type of equipment you're working on in the efficiency of the equipment.

Okay, if it's a if it's a microchannel condenser, which we are starting to see in a lot of refrigeration equipment, you're, typically going to be twenty to twenty-five degrees above ambient, on your condensing temp, if it's a tube and fin condenser. So that's a standard, copper, tube condenser with aluminum fins or steel fins, whatever they are you're, typically going to be 25 to 30 degrees above ambient. So it's not necessarily dependent on the refrigerant all right and it's mostly dependent on the efficiency of the condenser. But as we get some new refrigerants that have higher glides, there's some weird stuff going on in there, okay, but for the most part, no, it's not dependent on the refrigerant, it's just dependent on the equipment, so a rule of thumb.

So that means this, isn't the you know set in stone number it's if you can't get a hold of the manufacturer to tell you what your condensing temperature to Banff in condenser you're gon na be 25 to 30 degrees above ambient condensing temp over and you? Okay. That's yours, liquid saturation temperature, the difference between the ambient temperature and your liquid saturation temperature, okay, and if you have a microchannel condenser, it's typically gon na be 20 to 25 degrees, condensing temp over ambient. Okay, so be cautious about that. Always lean on the manufacturer.

Talk to them see what they have to say and then go from there. Okay, let's see what else Ralph I see, Ralph he's Dallas fan in here: Ralph works for Honeywell refrigerants. I sent someone your way. A few minutes ago, someone had asked for your email Ralph.

If any of you guys, Ralph is always in here in these streams, he's always willing to lend a hand to different refrigerant related questions, like I said he works for Honeywell refrigerants he's always willing to help you guys with conversions and best practices when converting refrigerants. All that good stuff, I'm gon na, put Ralph's email in the chat right now he's a really cool guy and he's, like I said, he's always willing to help. So I'm gon na post his email right now, that's in there right now send him an email. If you guys have any questions about any of the retrofit refrigerants any of that good stuff, okay, Ralph's, always a good guy willing to help everybody in there, so definitely okay! Mr.

ice, you asked a really good question. Curious HVAC is also asking the same question and mr. ice said: why do scroll compressors have liquid injection and how does it affect pump down? Okay, really good question. So, first off we got to understand the difference between a DTC valve, okay and liquid injection.

There's a couple different methods of liquid injection, so it's not necessarily always with scroll compressors. Okay, let's talk about a tre v10 / ature, responsive expansion valve a temperature. Responsive expansion valve is a valve used, and this this really came out when r22 became popular as a medium temperature and in the very beginning, r22 is kind of a popular low temperature refrigerant. They quickly realized.

There was some problems with using r22 as a low temperature. Refrigerant, but in the beginning they were using it okay, so when 502 was being replaced before you know, III guess I should say it was a little bit before my time, but r22 was starting to be used as a medium temperature and low temperature refrigerant and what They realized was with r22 refrigerants, they ran higher discharge temperatures, so that's the discharge line temperature or discharge gas temperature ran much higher with our 22 refrigerants, so they quickly realized that they needed to do something because what they were finding was the discharge temperature was so High, it was causing oil breakdown within the system, so they came up with a tre v @ m per ature, responsive expansion valve okay and before so I'll get to the scroll compressor section, but before they were just still using hermetic piston, driven compressors and semi-hermetic piston. Driven compressors and they were still seeing high discharge temperatures and they were having issues with that. So they came up with the temperature responsive expansion valve and essentially that was a D superheating expansion valve okay.

So an expansion valve that took liquid refrigerant metered it into the suction line and cooled off the head of the compressor. Okay, it's just because of the the science behind our 22 refrigerant. It ran high discharge temperatures, okay, so they came up with that temperature. Responsive expansion valve and it helped them to cool down the the discharge, gas temperature.

Okay, so again they took liquid refrigerant off of the liquid line and they ran it into an expansion valve and they metered it into the suction line. Okay, so that was an older system, the newer scroll compressors. They still used liquid injection there's two different methods: they'll use a capillary tube type liquid injection, but then they'll also use a 10. Your responsive liquid injection Copelan compressors uses on their scroll compressors.

It's not just with our 2204 anymore; they use it on 404, a and now that we're going back to the more popular our 448 a and the 449 refrigerants are very similar to r22. So they run excessively high discharge temperatures again. So we have a temperature responsive expansion valve, but the Copeland compressors actually got smart and they realized that they were having issues with what a have a brain fart here for a second. They were having issues with compression ratios.

Okay, they were having really high compression ratios with the scroll compressors and then you add in the low temp gases, the low temp box, temperatures right and then you had high compression ratios and that was causing high discharge temps. So they added a DTC valve Copelan uses it on their low temp compressors. It's a discharge, temperature controlled valve; okay. Essentially it's an expansion valve that it has a rotor lock fitting on the side of the Copeland compressor.

I'm going to show you guys a picture cuz. I I'm not smart and don't have it, but this would be a scroll compressor with a DTC valve right here. Okay and what that does. Is it's the same thing as a tre V? Okay, it takes a liquid line, refrigerant, solid column of liquid, just like an expansion valve downstairs and it meters it into the crank case of the compressor to help cool off the discharge gas in the system.

Okay. So it's because of the the properties of the refrigerant and the high compression ratios they were having over temp issues within the compressor they added that dtc valve. It's a very common thing, curious, HVAC guy had actually asked something about it. I had mentioned it and showed it in my video of the compressor that I had just changed.

It's very common. We see a low temp scroll compressor where you'll see a dtc valve on there, okay on the dtc valve, because it's a it has a capillary tube and I will actually show this picture again. So there's a capillary tube that comes off of the valve right here and it goes into the head of the compressor right here below this plastic cap and that capillary tube senses, the the head of the compressor and when the temperature gets high enough. It opens the valve and then the valve, so with a dtc valve, which is very common on the Copeland compressors.

You have no issues with pumping down because it's only gon na open when the discharge temperature or the head of the compressor gets so hot that it's gon na bypass or it's gon na allow it's gon na meter, the refrigerant into the suction side. Okay, now, when you get into some of the newer you'll you'll notice it on the newer heat craft condensing units, they have a liquid injection valve that uses a capillary tube in that situation. If you're using the capillary tube type type liquid injection, you will have to have a current sensing relay and ass Illinois bow at shuts off the flow okay, because the DTC valve uses the head of the compressors temperature. It senses the temperature and it only opens when the temperature gets high when you're pumping down the system - you're - theoretically not gon na - that valves not going to be bypassing okay.

So it doesn't affect the pump down situation, but on a capillary tube style system, where it's using liquid injection via a capillary tube. It's always going to be feeding refrigerant. Okay, so we use a current sensing relay that senses, the current of the compressor and what it does is whenever the compressor is running, it opens a solenoid valve that allows refrigerant to meter into the crank case of the compressor and cool off the head of the Compressor and that's on scroll, compressors, okay spoilin makes a TR e v. They have a bulletin 10 10 2, and this is just a diagram of a y 103 7 temperature responsive valve.

Ok, this is an aftermarket method. You can use this on a non scroll compressor or you can use it on a scroll compressor that doesn't have the port for a dtc valve. Ok, it goes upstairs before the compressor in certain situations. They, if you read the documentation, it says that you can put a liquid line, still annoyed valve and a current sensing relay on a temperature responsive expansion valve at Erev.

But you don't have to because in theory it only bypasses when the head of the compressor gets too hot. So if you're pumping down the system, the head of the compressor is going to cool down and the valves going to stop bypassing ok. But some people can choose to put those in. Hopefully that answers your guys's questions.

Adam showers, I see your popped up right now. Why do you scroll compressors over heat, more than reciprocating compressors, and it's just the nature of the design of the compressor and the high compression ratios that cause that, for, if you want me to answer more than that, we're gon na have to get a Copeland person On here to talk about why they overheat more, but I do know that scroll compressors definitely are more efficient. Okay, but yes, I have noticed that they tend to get hotter than a normal reciprocating, piston driven compressor, but it all has to do with the compression ratios and how efficient the compressor is so HVAC rookie, dude badass. Are you the first person to guess that, because I haven't been paying attention to, but yes it is the Rocky Horror Picture Show so awesome dude.

I was curious if anybody was gon na get that awesome. Dude. Let's see guys, I see lots of questions popping up in there post some more questions so repost them. If I miss them.

Okay, Dallas fan. I see you that you say that our 4:48 a has a lower discharged temp than our 22, so it may not be required, depending on where you are located, always check with the compressor manufacturer Ralph. That is a really good point. Okay, guys, you always want to check with the compressor manufacturers you want to talk to them.

I personally have been using our for 48 eight, and that is a Honeywell brand of refrigerant. I know that our 4:49 is very similar, but it's just a different mixture. I haven't: let's see I've done many heat craft, condensing unit installations with our 448 a, but they already had dtc valves or they actually had liquid injection via capillary tubes, because if you get a heat craft unit they come with that I have. I have done some conversions on our 448, a where I just had a piston driven compressor, just a normal hermetic, piston, driven compressor and I haven't had to do any compressor cooling and we made it through the summer without any problems.

Okay, so it really depends on your location and what you're gon na be dealing with. So let's see what else awesome hopefully answer your question there, mr. ice, so Kelly, Kyler, I'm not like an encyclopedia. I had plenty of warning.

That's funny that mr. ice asked that question because curious HVAC guy had happy to ask me the same question during over the weekend, and I had just been researching about these dtc valves in the temperature response of expansion valves myself so guys I myself get confused about Stuff and curious about stuff, just like you and I just research, I ask the Google right I was we were having a party one time and a buddy was talking or something like that, and he said the phrase dude just ask the Google and it made me, Laugh because the simpleness - I guess that's not really a word, but the simplicity, I guess, is the right way to say that of that that phrase ask the Google right cuz. We can ask the Google anything now before Google, we had all these books right and my van had a crap ton of books inside of it. Now I don't even have to have the books, because I have it all on my phone, it's kind of a trip.

How that works so all right! So out of curiosity, I had a some parents that, let me do some things when I was a little kid that I probably shouldn't have done, and I think I first watched the Rocky Horror Picture Show, which is the the comment or the the movie quote, that I put in there today I think I was about 10 years old when I watched the Rocky Horror Picture Show, and I just thought it was a musical and it was fun. I did not understand anything about what was going on in the Rocky Horror Picture Show until I was gosh I mean I don't think I watched it again. I remember watching it when I was ten. I probably didn't watch it again until I was 17 or 18 and then I realized oh dude.

This is a movie about transvestite aliens that are coming to the you know the US and yeah invading our planet, and that was a trip that was so bizarre. I would not let my ten-year-old watch the Rocky Horror Picture Show now so yeah things were different. I guess I don't know where my parents were just really liberal and let me do anything I wanted yeah. That's weird, all right, let's see what else? Okay Dave Dave! You asked dtc valves and copeland short cycling, so you shouldn't be short cycling.

It shouldn't be the dtc valve okay, but if your dtc valve is causing short cycling, it is possible. Okay, there's there's, usually some other issues that are causing the head of the. I sort of get so hot that it's making the dtc valve open up right, but if you're worried about that, what Coplin actually recommends? If you read in the Copeland documentation, what I'm gon na suggest is that you guys download Copeland bulletins and I'm gon na post. It in here right now, ayyyy, 4, 1425.

R4. Do you have a couple different bulletins and I'm gon na post it in the chat right now? This is the Copeland bulletin number. If you guys download this, it's gon na talk about all kinds of stuff with the Copeland compressors there's different bulletins. This is an engineering bulletin from Copeland.

This is the one that I just recommended right now. Ok, but again I posted it in the chat Ernesto HVAC. Our blogger, you asked when the next giveaway is, I don't know. What do you guys want me to giveaway? I did a spoilin BQ cake, giveaway a while back, and that was a pain in the butt, because I realized how difficult it was to do giveaways.

The problem with giveaways guys is that I have so many international viewers and it's so I can't ship internationally because of the cost and different things. So I don't know if you guys want me to give something away. Let me know what you want to give away. I mean, I may say no, but put it in there.

Let's see, what's up so download that Copeland application bulletin 84 1425 r4 and there's lots of good reading inside there about the dtc valves and how they work. If you're worried Copeland recommends to go ahead and install the current sensing relay and the liquid liner and a solenoid valve and basically we'll make sure that the dtc valve doesn't bypass in certain situations, you can also install a hand valve or a shutoff valve before they Are with the refrigerant going to the DTC valve so that way, if you're, having issues pumping down a compressor, you can shut the refrigerant flow off going to the DTC valve. Ok, so there's all kinds of different method you can do. I personally have never had a problem with a liquid injection or a DTC valve, I should say DTC valve or tre v10 / ature, responsive expansion valve bypassing while I was trying to pump a system down and - and I run in pretty hot ambience.

Ok, my my summertime temps on my extreme high as 120 degrees. My normal high is a hundred degree ambient so on a regular, I'm running 130 degree discharge, temp or I'm sorry, 130 degree, condensing temp or 140 degree. Condensing time and I don't have issues pumping systems - downs, my dtc valves aren't bypassing, but if you're having those kind of issues you either have a problem there or you need to install some kind of a hand valve or shut off before the dtc valve to slow The refrigerant flow to it so hvac rookie red fish versus fluke. What is the difference between the sides? Price? Okay, so a fluke meter is, is a.

I have a couple fluke meters. I don't use them very much. I have a bench meter right over here. You guys see it posted over there and it's obviously sitting right there, so I haven't had it in my van lately and I have a fluke 902.

I honestly don't use it very much. I use my field piece, SC 660, but I also have the redfish clamp meter. I honestly don't use the redfish client meter very much. The only reason why I have the redfish client meter is because I wanted I'm a tool, and I wanted it to be able to connect with measure quick when I, when I have tools that don't work with measure quick, I feel like.

I saw these options that I couldn't use and it was the electrical measurements of different things. But honestly, I bought the redfish meter and I used it like two or three times and then I never used it again. I'm not talking crap about the redfish meter, but it does have some features that I don't like. The lack of a magnet is a huge issue, but what is the difference between a fluke and a redfish? I have to say that the redfish meter, I all the the documentation that I've read on it - it's a very, very highly accurate meter for a low cost meter.

The redfish meter is actually very, very accurate, so but a fluke meter has always been known to be really high quality, but they're also really really expensive. Okay, so what's the difference, cost really between the redfish and the fluke, in my opinion, but convenience and different things are going to be lost too, because the redfish, you know, there's some things that I really don't like about it, like. The clamp was a little bit big. The leads are a little cumbersome, but I mean I don't use my fluke on a daily basis.

Like I said, I use the field piece, SC, 660, so so curious, HVAC guy. You asked about de-superheating expansion valves well at Erev. A temperature responsive expansion valve is a d super heating expansion valve, in essence, okay, but a situation most situations - and I don't deal with these very much. But I understand the concept the most commonly you're gon na see a D superheating expansion valve is on a system that has like discharge bypass, okay discharge bypass valve I'll show one right now.

This isn't an example of a discharge bypass valve that I cut open. Okay and then I have a little spoiling thing. I think I've showed this before you connect. You guys aren't gon na be able to see this right now, but with the SMA twelve by sport'ln.

It's basically in a controller that you can open and close the app. The expansion valves and discharge bypass valves, anything that has a stepper motor. You can, if you hook it up right, you can open and close it and see if it's actually working but anyways. That was off on a tangent.

In a situation where you have a D Super Union expansion valve you're, typically gon na see it on a system that has a discharge bypass valve. It might be for capacity control, unloaders different things like that: okay situations, where let's say you have parallel compressors or a compressor that you don't want to shut off because of the inrush current that's used. When you start up the compressor, you can put a discharge bypass valve on there, that's going to basically when the system capacity gets really low. It's going to continue to let the compressor run by opening up the discharge bypass valve, but you can't take discharge gas and dump it right into the suction line.

So you're going to take a DC reading expansion valve and meter that refrigerant back into the suction line. So that way, you don't kill the compressor with hot discharge, gas. Okay, that's a situation! You may see it more in the supermarket side. I really can't talk much about the supermarket side, because I have no business talking about that.

I don't work on that kind of stuff, but I have seen de-superheating expansion valves on parallel compressor systems so where you have two compressors one common suction line and basically I've had refrigeration systems at a restaurant, where you've got two compressors, you always have one compressor running And they don't turn it off because they don't want to see that inrush current to save energy, so they'll use a discharge bypass valve and a temperature or AD superheating expansion valve to meter the refrigerant back into the suction line. So, basically they'll take the discharge. Gas. Even though the liquid line solenoid valves for all the circuits downstairs are closed, the compressor continues run because they take that discharge gasps.

They meter through an expansion valve to dump it right back into the suction line. So it's kind of like a closed loop until the capacity and the system is required to increase then they'll close the discharge bypass valve. So hopefully that answers your question there bill. I don't have a lot of knowledge on D superteen expansion valves, but I do know that a TR e V or a temperature responsive expansion valve is in essence a DC reading expansion valve okay and it's just metering the refrigerant back into the suction line.

So, let's see oh cool, I see a comment there right now and I want to address that because my daughter was super stoked. I saw someone comment about the VW Bug behind me. Okay, so I posted on social media that my daughter was building me a little Mustang. It's super awesome.

This is a Lego. It's made out of Legos guys. This is really cool. My daughter she's 10 years old she's super into Legos and she loves to build them and I've been wanting this Mustang.

This is like my dream car. I think this is like a 67 yeah, 67 Mustang GT, but anyway she built this for me out of Legos. Okay, if you guys haven't done this, it's super fun to do with your kids. I helped her a little bit, but she did like all the work and then she has been she has built this before, which is her VW, bus or micro bus, which is also one of my dream.

Cars. I've always wanted a VW bus. She built this out of Legos and then for her birthday, which just passed my wife and I got her. This VW Bug, which she just built too, which is super cool because she likes to do these, and I love to help her a little bit with them.

And then I'm a I'm a fan of all three of these cars. Well, I never really wanted a VW Bug to be honest with you. My wife's always wanted one of these a convertible, but I want to evoke swaggin bus and a 67 Mustang for sure. So I put those right there because she was super stoked.

She wanted me to point them out to you guys. So let me turn my fan on right here, because I'm dying over here there we go. I got a fan blowing on me right now, all right. Let's see what else we can get to here, what else um? Okay, so I've got some of the things on my list right here that I want to address and I'm going to address them.

So I don't know who asked me this question. I think it might have been you curious, hvcu guy, but someone asked me how big the regions were, that the Chi rack rack had controlled. So in my video we had a compressor and a refrigerant leak and I want to say they have a custom cooks line. Downstairs in that particular restaurant, some of you may know which restaurant it is, but I try not to mention names, but they have a custom cooks line.

That's probably about 40 feet long and it probably between the entire cooks line. There's there's two systems that control it and I want to say: there's one two: three, four: five: six, seven, eight nine there's about 10 evaporator coils within it with all quarter ton, TX bees controlling it. So it's a pretty big custom, Island, cooks line or whatever that that that rack had controlled so but the rack also controls walkins and walk-in freezers and all different things like that. So, okay, so the next thing I want to get into ernesto hvac, a vlogger.

You said I watched ege van life - videos, if you like those, I honestly don't I'll, have to look and see. I've watched a few van videos, but I don't know if I've watched tge van life, so okay. The next thing I want to cover Thomas Thomas had asked me to explain: had pressure, control, valves or headmasters, okay, and I want to go ahead and talk about a head head pressure. Control valve.

Okay. Headmaster is a common thing that we call a head pressure. Control valve a headmaster - if I understand it correctly, is actually the trade name of alko or Emerson's head pressure, control valve okay, spor Lynne, which is the very my favorite brand of valves, basically to use okay, even the fact that they're not I mean that they are My sponsor has nothing to do with that. I love spoiling products okay, so this is a sporran head pressure.

Control valve I've done a cutaway on this valve, basically, where I took the components out cut the valve open. Okay. These are often misunderstood valves. Okay, a lot of people blame head pressure, control valves for being the problem when really they're, not head pressure control valves, in my opinion, okay, this is just my opinion.

I have no scientific evidence. The majority of the failures of a head pressure control valve is simply because of system contamination. Yes, there's the the very rare times that you have a power, the power head essentially or the head. The sensing element goes bad okay.

That does and can happen, okay, but it's very often in my opinion, that head pressure control valves go bad because of system contamination. Okay, so essentially what the head pressure control valve does it's meant there or it's in the system to basically maintain a head pressure in the system and the reason why we need to maintain a head pressure is so that we can have a constant pressure drop across Our expansion valve this is a cutaway of an expansion valve for a spoilin system. Okay and the way an expansion valve works is it needs to have liquid refrigerant, pure, solid column of liquid refrigerant, coming into the valve and then based off of the temperature of the suction line coming out of the evaporator coil. It meters refrigerant into the suction line.

Through the valve, okay, now think about this valve: okay, let's, let's, let's try to break this valve down, okay, think of a sprinkler in your house. If you have really low water pressure, your sprinkler on your grass is going to shoot not very far right. It's not going to shoot as far is, if you have higher water pressure, if you heard bit higher yeah, I guess that's the right way to say it. So if you have higher water pressure, your sprinklers gon na shoot far or further, I'm not talking correctly.

Today. Okay, anyway, so you guys understand the concept of what I'm trying to say. Think of it as water pressure in your sprinkler. Okay, the more pressure you have, the farther the sprinkler is going to shoot an expansion valve and again what I'm trying to break down for you guys is that an expansion valve works.

It needs to have a certain pressure drop. It needs to have a certain amount of pressure coming to the valve, so it can maintain a certain amount of pressure coming out of the valve okay. It has to have a margin of error because you have a sensing bulb and it's gon na select and it's gon na open and close the valve. An interesting way to think of an expansion valve is a constant superheat valve.

It's there to maintain the superheat coming out of a per evaporated right, the lower the superheat, the more efficient the evaporator is, but there's a point at which you get too low when it becomes a problem. The higher the superheat, the less efficient, the evaporator is so a head pressure control valve everything in your system when you think about a system. The way that it works is it's it's it's just like a giant system. You know sit.

I don't know what I'm thinking there, I'm kind of losing my train of thought there, but think of the human body. Okay, you've got a heart that pumps, the refrigerant. That's your compressor. You've got veins basically that let the the blood flow through your body, okay, with the the compressor running in the system, you have to have an expansion valve that allows the refrigerant to flow into the evaporator.

Okay, you have to have a constant pressure drop across this expansion valve you. You have a small margin of error for the amount of pressure drop you can have across this valve, but we have a head pressure: control valve there to regulate the amount of pressure drop. The head pressure control valve is meant as a low ambient control as your ambient temperatures drop. Your head pressure goes down.

If you guys understand the correspondence between your your outdoor ambient temperature and the refrigerant pressure, if you guys knew, I mean, if you break it down to the easiest sense, as your ambient temperature goes up, your head pressure goes up right, so a head pressure control valve Is there to maintain a pressure drop across your expansion valve? So if we keep the head pressure at a constant head pressure, you know a certain level. Basically we're gon na keep the amount of pressure going to the expansion valve there. If the pressure gets too low going to the expansion valve, then your expansion valves going to not work correctly. Okay, now that's with a a statically controlled expansion valve okay: this is a thermostatically-controlled expansion valve.

It has a sensing element on it. When you get into electronic expansion valves, we can float the head pressure and we we often times will have lower bypass settings on the head pressure control valve. So this particular head pressure control valve I'm pretty sure, based on the bypass setting. I don't know if you guys can read that now, probably not, but it says 240 psi.

So this is more than likely out of an ice machine is my thought, because ice machines often times require a constant head pressure because of a hot gas defrost. Okay, so there's all kinds of situations now, in a refrigeration system, we need a certain head pressure. It's actually a rather small envelope at which refrigeration properly operates. Okay, so I would say basically between 70 degrees and a hundred degrees, anything over a hundred degrees, you're gon na start to have efficiency drop offs and anything below 70 degrees, you're gon na start to have efficiency drop offs.

Okay, so that small envelope of 30 degrees. Basically, between 70 and 100 degrees, ambient temperature is when a refrigeration system operates optimal. Okay, as you drop below that 70 degree ambient. That's where a head pressure control valve comes into play.

It basically bypasses the refrigerant flow coming out of the condenser and dumps refrigerant directly into the receiver. Now I'm gon na post a video link right now, where I kind of explain and help you to visualize that process. Okay. So let me post a video link here.

You guys feel free to finish out the stream and then come back to the chat and you'll see you'll, be able to click on this video link, and I basically have temperature clamps on the liquid line. The discharge line - and I show what happens when we don't have enough refrigerant in the system and a head pressure control valve - is bypassing the difference that you in different issues like that, okay, so I'm kind of going off on a tangent. Hopefully I explained your question there and/or. I answered your question Thomas about the head pressure control valve.

Okay, let's see haha primetime, primetime, okay, so great point primetime says: head pressure, control valve no fan cycle. Yes, okay, so fan cycling is another way or another method of head pressure control. It is a valid method of head pressure control. Again, it's doing the same exact thing: it's there to maintain a constant pressure drop across your expansion valve.

Remember the expansion valve is: is everything to the system, the compressor pumps, but the expansion valve meters, the refrigerant into the evaporator coil? Okay? So if we don't have a certain amount of pressure coming into the expansion valve and a certain amount of pressure going out of the expansion valve, there's nothing there to drive the refrigerant through the valve. We need that refrigerant to be driven through at a certain pressure drop. Basically, okay, the expansion valve is a pressure drop device. It creates a pressure drop within the system and allows us to absorb heat in the evaporator coil.

Okay, hopefully, that answers that Adam showers, how high are compression ratios and scroll compressors and the vapor saturation temperature is high, the blower fans are fine and the pressures are 130 10 and it's low in ambient ozone. Adam showers. I need a little more context to your question. There feel free to send me an email, the HVAC, our videos at gmail.com and I'll be sure to answer your question a little bit better, because I need some more information, some more context to that.

So when you're missing oil and it's not in the TXV, how would you remove it or would you just leave it HVAC, rookie? Okay? So that's a question basically for my last video, where my compressor with low on oil and I want to know where it is. Okay, oil has to go somewhere; it doesn't just disappear within a system. Okay, even if you have oil breaking down getting too hot, it's still going to go somewhere. Most of the time, oil is gon na go down to the evaporator coil and it's gon na get stuck because oftentimes.

In my situation. In my previous video, we had poor oil returned, and that was an issue. Okay and that particular system is a compressor killer. I've said the reasons why that's a compressor killer, but essentially you have multiple circuits, a multiplex system whenever the bottom section evaporators satisfy, which is very common for them to satisfy the pan.

Chillers section up top is still running, but the pan chiller section is usually about two thousand BTUs. When you figure, we have like a two horsepower compressor. So there's a possibility of only a mm BTU evaporator running when you still have a two horsepower compressor. That's not enough refrigerant.

Coming back to the system, that's not enough refrigerant velocity to bring any trapped. Oil downstairs back up to the system, so I call that a compressor killer because often times that'll cause over. He is shoes. It'll cause oil return issues, that's something that we have that's very common in multiplex systems is, I call him compressor killers, okay and in a situation like that, you just got to change the compressor every three years.

The question is: how do we get that oil back up to the compressor well oftentimes, when we put a new compressor into there, when it's under a heavy load, that oil is going to return back up to the compressor and you're actually gon na have to drain Some oil out of the compressor, because it'll be overfilled with oil, which will cause some issues. If that oil doesn't return to the compressor, you can try change any vaporetto, coils pullings. I mean it's literally just a matter of taking the evaporator coil out of the picture. Pouring the evaporator coil out, CNF oil comes out taking the the the liquid line going into the evaporator coil and kind of dipping it down seen if some oil comes out, there's not a really good way to get oil back up to the roof.

Once it's gotten downstairs, it's just kind of a crappy situation. In our instance my evaporator coils. Let's just say I have one evaporator coil running that evaporator coil might only be three thousand BTUs and it has to 3/8 inch lines going to it. That's not enough velocity to take any oil back all the way up to that compressor.

Interestingly enough, that compressor has an ancient innate suction line, but it has the possibility of just one evaporator running with just a 3/8 inch suction line from the evaporator you're, not going to get enough refrigerant velocity to bring oil back up to that system. So in my situation on those kyrat rack systems, you're just going to take an evaporator out of the picture, I was actually surprised that when I pulled the power head off that I didn't get oil draining out of the expansion valve I've heard of people drilling into Evaporating all's I've never had to drill into an evaporator coil, but I guess that's a method you could do to find the lowest spot on the evaporator coil a hole in a spot where you can sand it up and braise it. I guess that's a possibility too. On that particular system, you just got to change compressor every couple years and hope that all the oil doesn't return back up and when you have oil issues, you just change any vapid'equal most of the oil probably logged inside that evaporator coil, so um, let's see d-rod 205, what length of rise until you put an oil trap, 15 foot or more? Like 25, I mean in a perfect world anything more than like 10 15 feet.

You're gon na have an oil trap and there are a suction P trap. Sometimes we can't put them in because of certain situations, but most of the time anytime, I'm putting in a walk-in evaporate or call I'm gon na have a try or try to have a suction P trap in there downstairs so anytime on the rise just throw a.