Do ah it's time to chill out and get ready for a mediocre q, a live stream if you're old enough grab yourself your favorite adult beverage and if you're not stick with apple juice, put your feet up and relax. If you have any questions, feel free to ask them in the chat and now, let's queue up the intro music do yo. Hopefully you guys are hanging in there. It's uh, it's going okay over here, nothing too crazy just another week! Thank you so very much for that.

Super super chat, big, pawn, cable guy. That is awesome. I'm gon na start this off by addressing that um. I really really do appreciate all the support that you guys give this channel.

It is an awesome awesome thing. It is not needed, but it's much appreciated my wife so secretly passed me my hot tea, so and no that was not vodka, that i was drinking, that is water in a mason jar. So it's not white lightening or anything like that. Okay, but yeah.

No! I am in the mood for some hot tea right now and uh. Actually, i probably should take the lid off for a few minutes. I know that sounds ridiculous because i'll probably end up spilling it, but if i don't, then i'm gon na give some people some great meme material. When i freak out and drink my hot tea, so um again, you guys thank you so much for the channel support.

Okay, there's been tons of support rolling in from so many different. You know ways that people can and again. I know i said this on the last stream. I don't really address it enough, but the patreon supporters you guys are awesome.

Okay, thank you. So very much. The youtube channel member is the same. It is amazing: okay, um people that are giving super chats.

You guys it is awesome, thank you so much um and then the people that purchase merch from my website. You guys, you realize that you don't even have to financially donate to the channel to support it. Okay, simply watching the videos - and i know this sucks but watch the commercials - let youtube pay me: it helps okay. Every little bit helps because there is a lot of time involved in these, but i'm going to make it completely clear right now and i've said this many times before and i'll say it again, even if there wasn't channel support coming in, i really do enjoy making These videos and i would continue making them okay, so it's just an added bonus when it does come in all right, um.

Also uh uh, you guys. Thank you so very much middle picture diagnosis. I like your little emoji thing. That is awesome.

That is cool! You guys are getting super creative with your little emojis and stuff. That is awesome, but yes, you guys it is amazing, okay and thank you so very much from the bottom of my heart right. I really appreciate it um, but yeah. If you watch the the commercials, let youtube do it, it's awesome.

Okay, that's that's the easiest way to support the channel all right. So let's start this off right as usual, i've been doing this a lot more. Lately, i'm just an hvacr service technician. I'm a tech.

Just like you guys, okay, i make mistakes and i try to learn from those mistakes and i try to share those mistakes. Uh hvrcr whiz. Thank you. So very much for that super chat.

Okay, i try to learn from my mistakes. I try to share my mistakes. The whole point of this youtube channel was training aid for my own employees. I made the channel public, the channel grew, it's become this machine that has become, and i still just try to share my daily service calls and my mistakes.

Okay, i am not perfect um. I make mistakes every single day, let's uh, let's talk about something that i did today so today i was on a um, a compressor, lift okay, i'd been talking about doing this compressor lift if you follow my social media or any of my other youtube channel feeds. I'm on the hvac overtime show on the hvc overtime youtube channel. I've been talking about this compressor, lift that i was getting ready to do and i built a little custom gantry out of unistrut, okay tested it out, and everything was good.

Well, when i went to go, do the lift today, what i found was, i didn't, have enough support on the bottom of the gantry. I was still able to do the lift, but i had to do it very carefully because the gantry was kind of flexing a little bit here and there, because i needed some crossbars to support the bottom. I had a t basically connecting the bottom piece of unistrut that was sitting on the ground to the vertical piece. That's going straight up and it was just flexing a little bit back and forth too much.

So i had to very carefully finish the lift, because i was already in it to win it. I went ahead and finished it, and i was also fighting my little uh trolley that i had put up there kind of moving around um. You know we learn from our mistakes, guys. Okay, now i knew that that lift wasn't gon na go perfect.

Okay, nobody got hurt, we were very safe, we had protection, ppe and all that stuff, okay, but i knew it wasn't. Gon na go perfect and i tried to prepare for anything bad. That would happen. Okay, so it's in my opinion, if you could at least be aware of your surroundings and be aware of potential problems, i kind of had an idea that the the legs might flex a little bit.

Okay and i was kind of ready for it, and i was monitoring it and being very careful and you know just trying to be cautious again, i'm not perfect, i'm not this perfect! That makes they're this person. That makes this perfect thing every single time. Okay, you know when i posted a picture of that gantry on instagram. It's really easy for people to say you know, that's the most amazing thing you're, so brilliant, i'm not brilliant.

Okay, i learned about that by simply google searching, you know heavy lift ideas. You know how to lift how to how to lift something safely without hurting my back. Okay, um, i research stuff, just like you guys, okay, so i just try to share the mistakes that i make with you guys and i try to you know be forthcoming with everybody and just let them know right. So i was able to safely.

Do the compressor lift now? Why did i build a gantry? Why did i use a pulley system? Okay, it was just a 75 pound compressor. You know - and i i posted an instagram post today saying you know what in the past, i would have just grabbed that rope and lifted that compressor up. But you know what the older i get the more i'm concerned about my health, okay and it's sad that we have to realize that as we get older and older, my back starts to hurt every day. You know little things start to happen and i worry about my future.

I already am losing my hearing. You know i've gotten more things that i can count in my eyes. I've gone to the the urgent care so many times to get things picked out of my eyeballs, i'm lucky. I can see out of my eyes, okay, and that's because you know some of the times i wasn't wearing safety, glasses or other times.

I was wearing safety, glasses and the dang things went around the safety glasses, but still okay, um. I i'm so concerned about my health these days and i wish i was more concerned when i was younger okay, because maybe - and i don't know this for sure - but maybe just maybe i wouldn't be losing my hearing like i am maybe just maybe you know i Wouldn't have all the scar tissue on my eye, you know or eyes, i should say a retina or whatever you want to call it. Okay, um, it's kind of funny, because every time i go into the urgent care, it's funny the doctor. They i can tell you the whole process.

I could probably do it to someone as many times as have been done to me. I go into a dark room. The doctor puts a fluorescent dye in my eyeball. He drops two drops on there.

I close my eyes. He puts a fluorescent, i mean a black light and looks at my eyeballs and he says every time wow there's a lot of scar tissue on your eyeball yeah. I know it's because of every time i've hurt myself, you know um. So if i could give any advice to any of the younger guys is, take your time be safe and i mean within reason, guys: okay, a 75 pound compressor that one's pushing the limit.

Yes, i've done something that heavy before, but i've regretted it. My arms were jello when i was done. You know, i'm shaking, there's no reason for that. I've pushed things up the side of the building on extension, ladders.

You know doing ridiculously stupid things, guys those things that you see memes made out of i've done that stuff. Having one guy put his hands on the bottom of the condensing, actually i was that one guy i think, walking up the ladder with just my hands underneath it that was the stupidest thing. I've probably ever done in my life. Okay, i wasn't concerned about safety and i should have been okay.

So that's why i built the gantry. That's why i got a pulley system so that way, i wasn't roping that i wasn't not putting that all on my weight and i was trying to be careful, but even trying to be careful and being concerned about my health. I still make mistakes and the way that i built the gantry, but it was okay. Okay, i was prepared and i was aware of what was going on and i was very careful and everything went well.

Okay, but you know we just got to be more concerned about ourselves. Okay, the job is important. Okay and i say within reason, because you know come on a a 30 pound compressor. You can probably lift that okay, so within reason, i'm not telling you, but it's interesting, because when i posted you know, it's really easy for people on social media and i'm not paying attention to the chat at the moment.

But i'll look at it in a minute. But it's really easy for keyboard warriors and people on social media to judge you know when i posted a picture of that, and they said oh no. I just make my boss get a crane. Well, you know, you, don't know the circumstances and you can't always get a crane, and sometimes you got to do what you got to do.

Okay, so in this situation this was a five-story building the crane that they would have needed to lift. On top of this building would have come in two pieces to lift a 75-pound compressor. No, not gon na happen, okay um, so we had to do what we had to do. Okay and we safely built a gantry system that we were able to use some pulleys and rope, the compressor onto the roof.

Okay, but again there was there was you know, mistakes that happened, but it's okay, nobody was hurt. We were safe. All is well okay, so i really appreciate you guys making it to this live stream. I'm gon na go back and forth between my list of things to talk about and the chat.

So let's go ahead and look at the chat, because there's a lot of stuff that i missed in here um, if, if i miss your guys's first off, if you guys have questions or things you want me to address, put them in caps, lock: okay, that's the Best way to get my attention, if i don't address it, you can keep posting it in caps lock until myself, or one of the moderators tells you to stop. Okay, if i miss your question, feel free to send me an email to hvacr videos, gmail.com and i'll. Try to get back with you, i know i'm behind on my emails, guys it's starting to get kind of crazy um. I remember hearing a story from an acquaintance of mine.

I i personally don't know him. I met him one time a couple times. Actually um andrew grieves, he has a youtube channel called ak akhvac. He hasn't made videos in a very long time, but i remember him talking about the amount of emails that he gets and i've now reached that level where i'm getting that amount of emails.

There must be 10 emails a day. You know that i don't get to pay attention to because i'm at work, so they just come. You know compile and build up and build up until i have a ridiculous amount of emails and then chats and different things like that. So i apologize if i don't get it to it, but even with the emails and the chats guys.

If i don't answer your questions, just keep resending them. Eventually, you'll get my attention. Okay, until i tell you to stop basically all right so um i always make gifs out of myself or memes or whatever you call those things so um all right. Let me see we got in here: uh, oh yeah, okay, the master of everything you loved, how i kicked it to try to stop the vibration sound on that condensing unit.

That was next to my my unit, yeah, all right, uh. Let me see each section weighed about five 000 pounds. Had a 300 ton yeah, that's crazy, joe! That's that's a heavy lift, but that is a heavy lift. So um all right.

Let me see what i'm missing in here um. I appreciate everybody. That's in here. This is awesome, guys, um, okay, cool, i'm gon na go ahead and get to my list of things to talk about right now, uh.

So i had a couple videos - and i was able to do a couple - live stream service calls this last time too. So since uh, i want to say since the last live stream yeah, so i had two live stream service calls and two videos: okay, the live stream service calls when i can do them guys, i will, and i'm still trying to figure out the whole audio. We're really limited by the audio and the internet service, so i'll do what i can when i can okay, but i also have to be careful too, because the live stream stuff. You know i like to make the videos too.

So it's just a fun thing, but but anyways um the live streams. They worked out pretty decent. You know they were all right and as far as the uh, so the first live stream was on 9 28. It was a live service call where we had bad condenser fan motors on the walk-in cooler that i recently replaced a compressor on it.

It was actually well it wasn't recently, but it was my most recent video uh before 9 28. I think it was released on 927 um and uh. It's funny, because i considered changing those condenser fan motors when i changed the compressor, but i was like i'm gon na. Let it go and then a couple months later, condenser fan motor died.

Okay and then i went ahead and changed them both now, when i did that i ended up having them get the electrician to come out and replace the breaker. Now i mentioned in the live stream video that when i got there the breaker was tripped. I owned everything out. There was no direct shorts to ground.

So therefore i tried to reset the breaker and it wouldn't reset it just kept tripping, but nothing was grounded. So i pulled the breaker out of the panel because i've i've had this issue at that restaurant. Before and the breaker was full of sand, i shook a little pile of sand out of that circuit breaker, even with the cover on that panel. The sand just goes around and gets in those breakers, it's kind of crazy.

What desert sand can do so um. Let me see see: do people refer to neutral as common? This always throws you off yeah. That is a very and i i used to do it too um. So, yes, technically neutral is on 115 volt circuit, but oftentimes um.

You know people refer to the neutral on a 208 volt circuit too, but it's really the common on a 208 volt circuit, but you'll get conflicting things. So what i try to say is: if i'm talking about 115 volt circuit i'll, call it a neutral, but it can also be called a common. It's it's confusing. Okay um! You can also have a common terminal on a switch okay.

So that's another confusing thing, so it definitely gets confusing and it probably slips out of my mouth quite a bit too. So all right, um. Let me see what i'm missing in here uh. I really appreciate that there transit biker, thank you so much but um.

Let me see what else uh. How long have i been using my detect? Select, i could probably say the detex select, has been used uh a couple, i probably two or three times i've replaced it, but it's it's. Probably. Over the last 10 years, i've probably been using that thing now i will say i mentioned this on another stream.

The other night i had the opportunity to use someone else's uh, inficon, stratus, okay, which is inficon, is the manufacturer of the detex, select leak detector? Okay, the detect select, is actually being replaced by the inficon 3, i believe, is the name which essentially is the my understanding. This is the way i understand it. I could be completely wrong, but my understanding is the same sensor. That's in the stratus is in the inficon 3, but the inficon 3 just doesn't have the ppm display.

That is what i've understood to be the difference between the amphicon stratus and the inficon 3.. So i had the opportunity to use the inficon stratus a very cool leak detector. It found leaks that my detex select could not find okay. So i was working on a 410a evaporator coil that had leaks in the middle of the fin pack and they were slow leaks and what's interesting was the inficon stratus was able to find the leaks very easily.

Now, once i found them and found out where they were, i was able to take my detex select and put it up to the leak and it's it found it. But it's just the stratus found it a lot quicker and i was able to breeze by it. Okay um, so i honestly am probably gon na consider buying. I honestly am probably gon na consider how many times can i say that, but i'm probably going to buy the the stratus when sometime soon, because my detect select, i kind of feel like it's about time to buy a new sensor for it, and i think i Might retire the detect select, which has been an amazing leak detector for many years? So, if you guys are looking into a leak detector, i would strongly urge you guys to look into the inficon 3.

I think is what it's called or if you want to step it up to the parts per million readout go with the stratus. Okay, i believe the inficon 3. I think i looked today was it's right around the same price as the detect select it's 400 and some change, but i believe the stratus is almost 800, so it's pretty expensive for the stratus, so um all right. What causes scroll compressors to leak at the head of the compressor? That's a very interesting one.

I don't know bud. I don't know where it's leaking on the head. I mean that's, that's pretty crazy. Um can't say that i've really seen a scroll compressor leak on the head uh.

Maybe you should send me an email or some pictures um, and i could look at them a little bit more. Let's see if i burn my mouth with my tea: hey, that's apple! Tea, i thought i was getting chamomile tea. Well, thank you for the apple tea all right. Let's see what else we got in here: um you're, currently working with a residential light commercial company up to 20 tons your one year, experience running by yourself.

Thinking of making the jump to only commercial company, do you i think it's worth in jordan? Really, it depends on your experience and what you feel comfortable with and what you what's best for you and your own basically or you, and your family okay. I can't make that decision for you one year of experience. I would caution you to be careful about jumping ship too quickly, because you still definitely have a lot of things to learn. But if you feel like you're, not learning enough at the company you're at then you know that's something to consider okay, but i i come from the generation of people that doesn't jump ship every five minutes.

Okay and i'm not saying that you're wrong for doing so. I'm just saying that you know um, there's there's some people that literally you can look at their resume and it's like dude. You've been a technician for 10 years, but you've worked at seven different companies like what's going on here and then, if they have a valid reason as to why hey i started in supermarkets, it was too much work. I decided to go to residential, which was a ridiculously silly decision.

So then i went back to commercial, i mean you know, and they tell me that kind of stuff - okay, you know, but to jump ship. You know - and i'm not saying this is you, but i'm just saying to jump ship for 50 cents, an hour 50 cents an hour 50 cents an hour. You know you got to be cautious about that, because it does reflect a little differently on a resume at the same time. That is something that, as a hiring person, we have to kind of learn to under to get used to.

Is that more and more resumes? This day have more companies on them, whereas in the past technicians had loyalty, whether or not that loyalty was justified. I don't know, i understand, there's two sides to it. Sometimes companies can take advantage of people all sorts of things. Okay, so you kind of got to weigh out the factors what's best for you and your own.

Are you? Are you learning? Is there growth potential? You know that kind of stuff and if not then yeah, maybe you need to make a decision on whether or not it's right to move on okay. So if i didn't answer that enough, send me an email, okay, all right, let me see what else we got going on here: uh um, all right, i'm gon na get to my list, yeah guys. If you could please please, please smash the thumbs up button. It really does help the stream okay, so um the ice machine is empty.

Was another video where i installed two temperature controllers. Okay, this one needs some clarification because there was a lot of questions, so i had a service call on a hoshazaki ice machine. It was really weird because it made a batch of ice when i turned it on couldn't figure out what was going on, but i i put my service gauges on it, and the head pressure looked a tad bit high, so i went ahead and jumped onto the Roof - and i noticed that two of the three condenser fan motors for the refrigeration rack - were not running okay. This is where it gets kind of confusing for people, so they have a rack with a common condenser.

What i mean by common they're, separate circuits in the condenser, but it was common meaning it was the same slab, coil, okay, so each condensing unit or each circuit was independent of the others. Okay, but it was just one common condenser. Therefore, it shared three condenser fan motors, one condenser fan motor runs 24 7 and the other two are staged via temperature controllers, so they had mechanical temperature controllers that had a lot of drift in them they weren't very accurate anymore. So i went back with digital controllers.

Now this is where the confusion comes in a lot of people didn't understand why we had temperature controllers shutting off the condenser fan motors okay, so those of you that have experience with cold zone refrigeration racks if you're already experienced with them. You know that majority of the time the cold zone - refrigeration racks, are grossly oversized. Okay, you typically tend to run rick. Thank you so very much for that super chat that is awesome bud so on cold zone racks.

They typically oversize their condensers already all right and then at that they stage the condenser fan motors down okay, but we also have head pressure control valves on all the condensers, even the ice machines within that rack. So we staged the condenser fan motors down to try to um, maintain proper head pressure, proper oil return, for when you know it gets cool outside basically, okay, but this is where people get confused inside the condenser. Each condenser fan motor is not partitioned off from the other ones. It's one common space in there, okay, so when one condenser fan motor stages down, it's not like everything shuts down: okay, um, it just raises the head pressure slowly to everything.

Okay in that rack, so it's not like we're just shutting off everything and just driving the head pressure up: okay, no you're, slowly, staging it down; okay, but it's it's a giant common space in there. I guess i should have shown it on video because it probably would have made a little bit more sense to people. Okay, let's see what else i got in here, i'm not missing anything as of yet thank you guys. The the likes are definitely going up.

Keep smashing that, like button it'd, be awesome, guys: okay, uh, the next video that i did was a live service call uh with burnt wires on a 15 ton split system - okay, that was saturday evening uh yeah saturday evening, and that one was a service call where I got up onto the roof. We had three acs down each one of them had a very similar uh electrical short where uh i'm. Let's call it line one: the black wire coming in or phase one or phase a was burnt on each contactor, going for each ac. Okay on one of them, the contactor was salvaged, the other two, the contactors were bad, so i turned live on the third ac unit.

When i was replacing the contactor, i showed a little tip a little trick about the contactor that came with screws, because i did not have a contactor with lugs and i needed one with lugs. Well, i happened to have another contactor. That was the wrong voltage that had lugs on it, and you can actually remove the lugs from those there's a little screw down in there, and i showed how you can swap those out. So that is a little trick to get you out of a pinch.

If you ever needed to okay, so i was able to use a 24 volt contactor that had screws when i got it, but i was able to put lugs on it so that way i could use it in the situation that i needed to got the customer Going i was actually back at the job site today. They have no complaints. Let me see what i'm missing inside of here. Um.

Let's see, reefer tech mark you're, saying a uh walk-in freezer pumps down to five psi immediately starts back up. Low pressure rises repeats until pressure stays low enough confirm good liquid line, solenoid valve compressor and dtc unit short cycles set low pressure to 30 and three psi thoughts. Does it have a scroll compressor mark scroll compressors, do not like pumping down to three psi if it's a reciprocating compressor, shutting it down to three psi sure i don't know your situation, but going further with your question. The cut in temperature cut in pressure of 30 psi.

It depends on your refrigerant, your ambient and your box temperature, because you have to remember that the the when the solenoid valve opens the pressure of the refrigerant drives the refrigerant through the system. If it's really really cold outside the pressure, the refrigerant is not going to have very much uh. You know the the temperature is going to affect the pressure in the system. Basically - and it's not going to drive that refrigerant, sometimes fast enough, so you have to look at your uh, your pressure temperature chart and look at the saturation temperatures of the refrigerant at ambient temperature and box temp to make sure that you're going to have enough pressure To drive that refrigerant through the system, i'm assuming you'll, probably answer my question about whether or not it's a scroll compressor.

But if it's a scroll compressor. In my experience, the scroll compressors don't like to pump down past 10 psi anything below that the scroll set's going to open and the pressures inside are going to internally equalize. That's when you hear that sound, like kind of like a blow-off valve where it equalizes the pressures out and then you have that constant on off on off on off on off now again um, i don't know if you said it's a scroll or not. Let me see if i missed this in here yet um.

No, you didn't tell me if it was a scroll or not mark, but um uh. You got to be careful on those scrolls. Okay. Also, copeland has a service bulletin out there on the scroll compressors, where they actually want you to install a time, delay relay uh, which does help with the short cycling on those things so uh any ideas.

What what of what more can be done during a pm? What do you expect? What do i expect my guys to do for pms? You know a pm. Randy depends on every single different location and what the customer wants to pay for me to do. Okay, most customers, they come to you with a not to exceed value or some sort of a price, and they say this is what we want to pay. What can you do? Okay, so therefore, we tailor the pm service to do to give them the best bang.

For your buck um, if i had unlimited funds, we'd spend eight hours on every package unit, and i mean that's, not realistic. So you know it really depends on what the customer is willing to pay for. For the most part, though, most of my customers pay for just like a real, quick generic pm service. Where we go under the roof, we change all the filters we hose off the condensers we brush the evaporators.

We typically don't wash evaporators we blow drains out. We check and tighten belts, if possible, look at electrical connections we're not necessarily torquing down on everything. They typically don't want you to apply service gauges or anything like that. We just check temperature splits across the supply and return when it's operating uh go downstairs clean.

The change the filter media on the reaching coolers open up the ice machine make sure it doesn't look horrendous, typically ice machine cleanings aren't on a pm service. We'll clean condensers downstairs if necessary, but we typically don't like use coil, cleaner or anything on a pm downstairs. This is what most of my customers are paying for: check the walk-ins out, pour hot water down the drains. Uh just make sure temperatures look decent, but we're not checking temperatures of every single unit.

We usually rely on the customer to tell us if they've been having temperature issues, uh check thermostat times and that's pretty much it i mean um, there's more. You know, depending on the customer, so uh alex. Thank you so very much for that super chat. That is awesome bud.

You are awesome. It is much appreciated. Okay, let's see what else um can i use a reciprocating compressor on a walk-in cooler? Yes, you can a recipe. A compressor is a compressor.

So have i ever worked on a mini portable ice maker? No, i have not worked on a mini portable ice maker. I know they make like countertop ones and stuff for like homes, but i've never worked on one of those um nope. I never have uh put in a new low pressure control. According to what was there? Someone has eliminated the time, delay relay 404 negative 10 80 degree, ambient uh, reefer tech mark unless it's a beacon system or an intelligent system or a smart evaporator.

There's no reason to re to eliminate the time delay uh. If you're working on an intelligent heat, craft system or a beacon or a qrc system, then they want you to take the time delay relay out, but for the most part that time delay relay is there for a reason to help with the short cycling um? Let me see what else we got in here: uh flash focus! Thank you so very much for uh that super chat. That is awesome. So you said you accidentally stuck a temperature probe into the squirrel cage fan of a brand new mini split.

Oh, that's! A bummer bud yeah, that is a bummer um yeah. I've been concerned about that. Sometimes you know pushing probes in too far and causing issues. What is the current price for a generic pm these days in california? Again, that's that depends on the restaurant and what they want to pay.

What i just described a few minutes ago would probably run the customer depending on how often they want to do it too, because if a customer is only doing a pm two times a year, it's actually going to cost them more money. Every pm, because we're going to have more work to do if they're doing a monthly pm of what i described changing filters doing all that kind of stuff. It's probably going to cost them four to six hundred dollars a month. Something like that.

It really depends. But it's going to change via region if they're doing it quarterly, the price is going to go up per pm and and as the the you know as they reduce the amount of pms, the price is going to go up every single maintenance. So a lot of customers don't really understand that they'll be like wait. We want to.

We want to save money, so we want to reduce our pm services and we only want to do four pms a year instead of six or eight okay. So the price of each pm is now going to go up so much because we still have to do the same amount of work, but now you're going to do it less now they may save a little bit of money, but it's still going to cost them More, you know and they're like well, that's kind of frustrating it's like well. I don't know what to tell you, i mean you unless they want us to do less then sure the price will go down, but the repair prices are going to go up. You know interesting all right, let me see what else we got in here.

I know i'm missing stuff. How do i set up a cpr valve um, okay, so a cpr valve? This is a little difficult. I'm not going to get crazy into this, but essentially a cpr valve or crankcase pressure regulator is there to reduce the refrigerant the amount of refrigerant coming back on a hot pull down, okay or reduce the the volume coming back on a hot pull down. Essentially, if you overload the compressor on a hot pull down, let's just say that you have a giant walk-in cooler and it gets to 80 degrees in there because you leave it off for a very long time and you turn it on.

That thing is going to be under a heavy load. The compressor is going to over amp it's going to have issues, okay, so a crankcase pressure regulator. In that situation, you would set it up via basically looking at the the rla of the compressor. Okay, what the manufacturer recommends the current draw should be under a load: okay and you're, going to dial in or adjust the crankcase pressure regulator to that current draw.

So basically, you put an amp clamp on the compressor when it's under a heavy load. You start it up and you turn the crankcase pressure regulators die or knob in there. Okay, until the current draw drops down to where it should be, and it's now essentially holding back the refrigerant. I guess in a way: that's not really the technical term, but it's reducing the amount of refrigerant coming back to try to reduce the load on the compressor.

Okay, that's the easiest explanation. I can give you over a live stream, but the manufacturer has instructions on how to do that. It's really easy and um. You should be able to google that just go to spoil and valve uh go to their website.

Spoilin sportlin sporland.com, my gosh, why? I couldn't think of that, go to their website. Um, look at the the the cpr valves and it'll it'll tell you how to install them and how to you know, set them up um. Let me see what i'm missing in here uh. Let me see what okay you're, not an hvac tech but you're curious.

If i can use two vacuum pumps at the same time um i don't see why you couldn't use two vacuum pumps at the same time, but honestly there's for the most part. I can't think of a situation where you need two vacuum: pumps: okay, so here's the deal most people don't understand that um. Let's say you have a manifold set. Let's say you have a field piece s, man, four! Let's make it easy like this.

You have a field piece: s-man, 360.. Okay, that is a three-port manifold. You have three quarter inch ports on that manifold. Okay, so you put your quarter inch hose on the high side.

You put your quarter inch hose on the low side and you put your yellow process hose on the vacuum pump. Okay and you start to pull an evacuation all right. Here's what you don't realize! The hoses on your system are limited to like one cfm a hose. Okay, something like that.

It's like one point something rather it's minimal. Okay, so let's say you have a seven cfm jb vacuum pump. Okay, but you have quarter inch hoses on it. You will never pull seven cfms through those two quarter inch hoses.

It's not going to happen so you're you're you're, basically limiting yourself on your hoses. Now you go to big giant hoses, get some true blue hoses, okay or some big appion hoses and you'll get the full flow of your vacuum pump. Okay and what you're gon na find is that you don't need to put two vacuum pumps. Most of the systems that i work on.

One single vacuum pump is going to do the job using large diameter hoses. So that way you can get full flow, also taking out the schrader cores, because the schrader cores are a massive restriction. Okay, so i don't see i mean. Maybe someone can correct me, but i don't see why you couldn't use two vacuum pumps, but honestly the money you spend on that extra vacuum pump just put that money into just one true blue hose or two okay and you're gon na increase your vacuum time tenfold.

It's gon na be amazing how fast your evacuation can happen. Okay, so using those quarter inch hoses guys the whole concept of a triple evacuation right where in the past, you know before we were using before my time, but the the the first triple evac was vacuum. The system down uh, you would purge the system. Oftentimes people would purge it with r12 or r22.

Uh then vent it into the atmosphere, pull a vacuum again. Do it again and do it again? Okay, the whole thing of a triple evac everything that i've read basically said. That was because we were limited by the tools that we had, so that was the best way they could pull an evacuation. There's really not a need for a triple evac anymore.

A triple evac is useless. If you have proper vacuum hoses that are large inside diameter, the true blue hoses again, i have no affiliation with them. I just really like them they're three quarters of an inch inside diameter, okay, um, and you can hook that up to uh seven cfm pump and you'll get the full flow of the pump. Okay, um so really yeah.

To answer your question, i'm sure you could use two vacuum pumps, but there's no need for it. So long story short all right. Let's see what else um. What's the most expensive tool, i've ever lost expensive tool.

I've ever lost a digital multimeter. I had at the time many years ago is a brand new field piece top of the line, digital multimeter, and i can tell you exactly where i left it. I can still picture it this day. It was a restaurant that i went to one time and i left it there and of all things the restaurant shut down after that so yeah uh.

That was probably the most expensive tool that i can think of right now that i lost all right. Let's see what else um there you go. 0.6 cfm of flow on a quarter inch hose there. You go so reefer tech mark came in clutch with the answer there: okay, so 0.6 cfm, so that that awesome, 7 cfm pump that you had to have but you're using normal gauges.

You're wasting your money. You might as well go buy the the the the cordless navac 2 cfm pump and you're still not going to get the full flow of the 2 cfm pump using quarter inch hoses with schraders and all that fancy stuff. Okay. So if you're using a standard vacuum pump, get yourself some bigger hoses, whether it be the appions or the true blues, get the giant hoses you're gon na appreciate it.

It's gon na make your life so much easier. Can a cpr valve cause too much sub cooling? I i don't know about that. Dude yeah, i don't know, that's that's an answer. That's a little too! I i don't know, i don't know if it would cause too much sub coin or not um.

All right vacuum setup need to refer to jim bergman. That's right! Jim bergman is the man when it comes to evacuations, okay, uh, just look up: um accutools, look up jim bergman. Look up, hvac school! Look up, evacuations you'll, see all the information on that stuff lots of great information. Jim is a really cool dude.

I had the honor of meeting him at the last hr expo very nice guy. So how do i tell the difference between a bad txv and a sensing bulb? That's lost its charge, um. Well, it depends so in my situation, i deal with refrigeration systems. So if you lose your charge on a sensing bulb on a normal refrigeration, expansion valve the valve is going to slam shut and it's not allowed not going to allow any refrigerant to flow through the system.

It's going to be like there's a complete blockage. So that's a pretty easy one. As long as you can hear your solenoid valve actuating majority of the time. Your problem is going to be the power head on the expansion valve.

If you're dealing with a sporlin expansion valve, then you can typically take the power head off now. In that situation, though, sometimes you can be in a weird predicament where the power head failed right when the system uh was or the system pumped down after the power had failed. Basically, so all the refrigerant is still stuck on the high side and you can't safely pump the system down because the refrigerant's stuck and it won't flow. So in that situation, you'd have to recover the refrigerant change.

The power head and or expansion valve clean, the strain or whatever it is and go from there, okay, but um. So on a refrigeration system uh, you know, basically, the expansion valve's just not gon na, let refrigerant through okay uh twisted candle company. Thank you. So very much that is an awesome super chat.

You are, that is much appreciated. Um, let's see uh. What's better in picture diagnosis, is things big middle or small or acorn? Well, it really depends on. Is it a late night service call? Then it's going to be a little picture diagnosis, so that way we can come back and do a big picture, diagnosis.

Okay, so it really depends on the situation um. When is the one inch inside diameter? How awesome would that be yeah that that's a pretty big hose um? Let me see what else we got do i ever work with atlas. Copco compressors. I've never worked with an atlas.

Copco, no um! Let me see what i'm missing in here. Uh black hoses are for vacuum, um yeah yeah knock it off. I mean traditionally, yes, colored hoses are for um, but you know you can get. They do make like yellow large diameter hoses, but that's a pretty good way to think about it, but they also make uh black uh quarter inch hoses too.

So you got to be careful about that, but that's a pretty safe way to assume that if it's a vacuum hose it's going to be black and or in accutools case is going to be a giant blue hose okay. But the point that he's trying to make is for the most part, if you're dealing with typical quarter inch hoses they're going to be the red, blue and yellow okay, but you can get yellow and 3 8s and all that stuff too. So let me see what else we got going on here. Do i already answer that question are lonox furnaces becoming common in commercial buildings? I don't know about commercial buildings, but they're like a law here in california, lonox in fact we're going past low knox, and i think we have another law that just came out on the residential side, where we got to use these high efficiency systems or something so Um acorn picture diagnosis - that is a uh, interesting name for sure, okay, so um.

Let me get to my list of things to talk about so the last uh video that i did was the hybrid freezer is too warm and that one was a blown fuse. I can't stress that one enough, okay, i told my story about the fuse blowing i'll, tell it again on this live stream, but in that situation i had a blown fuse i tested for any shorts to ground. I went downstairs investigated everything i did not just replace the fuse okay, i ended up finding what i thought could have been the problem, which was a wire that had come off of a terminal and it was potentially rubbing up against the heater terminal, the opposite phase And potentially or it looked like it had a burn mark on it. So i corrected that went upstairs tested for all continuity to ground.

Again, nothing toned out, checked, uh everything else, spun the fan motors and then i replaced the fuses and started the system up. Okay, now i told this story horrible experience. I think i told this on the end of that video, but i'll tell it again. I was at a golf course.

Many years ago it was a late night service call. They called me about their kitchen ac network and i can still picture the ac. It was a york like 15 ton package unit, and it was the one if you guys know what i'm talking about. It was the standard york sun line unit that had the double condenser that turned in and had a little space in between the condensers on the inside.

It was like a horrible design on that unit right because you could hardly ever get in there to clean that condenser and it had a blown fuse. Okay, so i went up onto the roof, found a blown fuse. They had an extra fuse. I put a fuse in there turned it on heard, a big boom and then fuse was blown again, and i don't think i told this part, then what i did was, i turned it off had another fuse put another fuse in.

There turned it on heard a big boom again, but this time, all of a sudden, the entire building went quiet that eerie, quiet, sound and my stomach dropped. Uh. Oh, what happened. I was trying to change a fuse without finding out that there was a direct short at the compressor okay.

So what happened was i actually blew the main, the main breaker blue and of all things when the main breaker blew the breaker went bad okay? What kind of luck is that so the main breaker was a 480 volt system. The main breaker went bad, it could not be reset. The breaker itself was bad, they had to call out it was middle of the night, so there was nothing i could do. They called out an electrician the next morning.

The electrician could not get the circuit breaker until the week or the weekday, so they basically, this golf course had an entire main panel down for the rest of the weekend. Uh now i'm sure many people say he should have been able to get it or whatever, but that was my fault because i did not test for direct shorts to ground before i replace the fuse, i'm getting the coke nose right now, um. I did not test direct shorts to ground before i replaced that fuse. That was the worst feeling in my stomach.

Knowing that i did something wrong. That was my fault that that breaker blew okay now was it my fault that the breaker went bad? That was questionable. I don't know: okay, nothing ended up ever happening with that job, but that was the worst situation. Don't or - and what did i say in my video i said: stop replay or stop resetting breakers stupid.

Okay, that's what i told myself: don't just reset a breaker! Okay! Don't do it don't just change a fuse look for direct shorts to ground. First, okay, spin motors make sure they're not locked up. If you do find a problem isolate it then check for more shorts to ground, then put fuses in and restart it. Okay, all right! Let me see what i'm melting here: coke nose, coke nose, yep all right um.

What am i missing? Okay, cool uh dave g says he blackened a whole mall because of a grounded 480 volt compressor we live and we learn. That is true. I learned from that mistake and it was like literally that point forward. I no longer started just changing fuses and moving on i was like.

I realized i screwed up okay, so we learn from our mistakes and we move on from them. Okay and i try to share them with you guys, i try to share my mistakes all the time. I really really appreciate all the people in here. If you guys could smash the like button, please it really helps out the stream okay for new condensers made for 404 507.

Have i tried, 448 or 449 just keep 440 404.. Okay, so uh 448 a works with polio, esther oil? Okay, it will work in a 404 system. You may have some capacity uh difference there, though, so you just got to be cautious about the capacity difference. Okay, so you need to do some research to find out if you're going to gain or lose capacity uh, but it'll work in the system.

Yeah, no problem with that you can do conversions from 404 to 448a. In a perfect world um you size the condensing unit correctly, you change the orifice in the distributor tube and you change the expansion valve to an r22 uh. You know temperature, whatever medium or low temp valve, okay, but um. I have been told that there's some other things you can do without having to change all the valves.

Sometimes you can make adjustments depending on whether or not the valve was oversized in the first place or whatever so um, but yeah. You don't have to necessarily do. I recommend the field piece: 480v. Yeah.

I carry a field piece 480v. If mine broke today, i would buy another one. Okay, uh typically, don't use the the micron gauge in my 480v, but there is times like i just did a job. The other day where i use my manifold to vacuum a system down - it's not ideal, it's not perfect, but you know i do every once in a while, but i can urge you as much as possible.

Don't pull vacuums through your manifold unless you know certain situations pop up? Okay, try to do an evacuation without a manifold using separate hoses, completely eliminate the manifold from the system. Let me see what i'm missing in here: um hey my buddy curious hvac, guys in here um. If i haven't already do me, a favor and uh go subscribe to the hvac overtime, youtube channel myself, bill curious, hvac, a team adam and hvacr north joe uh. We all do a show friday evenings uh, 605.

6, 10, p.m. On friday evenings we go live and we just kind of have a hangout and talk about different stuff. So i don't know if one of the moderators can go ahead and post the hvac overtime youtube channel on the chat. Do me a favor and go subscribe to that channel and check out our show on friday evenings? Okay, let me see what else we got in here: um all right, i'm gon na go and go to my list so um i talked in the very beginning of the stream about you.

I built a custom little gantry to do a lift with some unistrut. Okay, uh i'm gon na. I don't know if i'm gon na release the full video on that for liability reasons, but i definitely shared some pictures on instagram and i might show it a little clip or something like that in a video um. It's not perfect.

It definitely could use improvement, but it really really helped me. I said that in the beginning of the screen uh it was a 75 pound compressor in the past. I probably would have just tried to lift that compressor by myself, but i was concerned about my back and so i built a little gantry with a pulley system set up and was able to get that compressor under the roof safely. So um.

I talked about that when i'm going through my list of things to talk about um, so i had some great questions from a guy named drew now drew i'm not gon na be able to get every one of these questions, but i'm gon na kind of talk About this topic, a little bit so drew is very interested in getting into hvacr, and he has some really great questions that he sent me this great email, okay, the first question is actually a really good one. Okay, the first question he asked because he wants to get into the trade is he said what is the difference between starting with an apprenticeship and starting with a technical school? Okay? Now it really depends okay, because some people call an apprenticeship just basically a green tech. That's learning and he's riding along with something, and it kind of is in a way. Okay, but typically an apprenticeship is where you work and go to school simultaneously.

Okay, so you literally will go to school a couple hours a week and then also you'll work limited time a week too. Okay, if you're in a union program, you go through an apprenticeship for so many years and you go to school. So many nights a week. You have to meet a certain educational timeline amount and you have to work so many hours out in the field before you can graduate from your apprenticeship.

Essentially, the same thing kind of works with me when i hire a new tech he's considered an apprentice if he doesn't have experience, and he typically rides with me for six to eight months and then i slowly move him out into the field until i feel comfortable With his diagnosis - and he learns a little bit out of time - okay, what's the difference with going to trade school? Here's where a lot of people get confused, i'm not saying that all trade schools are going to do this, but some trade schools mislead you. I don't care if you graduate top honors all this fancy stuff from a trade school. That does not mean you have field experience. You still need to start at the bottom and work your way up.

Okay, trade school gives you fundamentals and a little bit of a background. So that way, when you go out into the field, you can get your eyes on things and you're a little bit more familiar with things. A trade school in no way can show you every single thing: that's going to be out in the field. Under no circumstances should anybody expect to come out of a trade school and be making journeyman wages.

That's that'd be nuts. If that happens, i'm not saying it.