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This video is brought to you by Sporland. Quality, integrity and tradition. We're here working on a ice machine and you just got all kinds of problems. It's it's our first like consistent Heat Wave I think I've said that a few times in the videos, but so everybody's really trying to starting to realize they got issues.

So kitchen AC wasn't working. Someone knocked the thermostat Off the Wall I'm sure there might be more going on, but I pushed it back on it's running then I was just walking around triaging the units just walking by. They're not complaining but I was just feeling and this one doesn't feel very hot. There's a big giant ball of ice on the section line and pull the filter out.

Bam! It's nice stuff so that's a nice amount of ice. So I'm going to set this one up for defrost and then this one right here. I happen to notice too. Wait, was it this one? Yeah, this one has a big ball of ice on it too.

so we're going to set both wait. I think what was it? I don't know. there might be. it might be one of these.

I don't know. one of the other ones has a big ball of ice on it I think it is this one so we're gonna check that out. Let's see. I swear one of these was iced up.

Oh yeah, so you guys can't see it. but I can see the suction line in here. You can kind of see it's all iced up. So this one.

so both of their bar units are down. So what? I'm going to do I'm not going to deal with it tonight I'm not even bringing it up to their attention they'd even ask me. But when I'm here tomorrow, I'm going to come and go through the kitchen AC I'll have them create work orders for both of these I Just don't have to deal with this tonight because they're not even complaining yet. Um, what I will do is I will de-ice these real quick.

so all I'm going to do is open this up, put it into or disconnect the cooling, let the indoor blower motor run and pull the outside air in. So I disconnected the uh compressor contactor and I'm just going to leave this door open, pull these filters out, and let this guy defrost itself. Hopefully the drain's not plugged up. That's a nice little chunker of ice.

It could be a low charge issue, or it could just be I don't know. we'll see. Uh, drain doesn't look too bad. I've redone this one.

Obviously a lot of these drains are all messed up, but this one seems to be fine. It's draining. Yeah, it's draining. So let's move on to the next one.

For some reason. Look at that big old chunkers. Um, look at this guy though. Good grief.

look at that name play. This guy's probably dead. Look at the head of it. which one is this? I don't think this one's been running I think this one's a dead compressor I Don't remember.

Looks like maybe is that oil? I Don't know. Yeah, this guy might be disconnected. Um, still hooked up there here. still looks like it's in the system.

This is my Y1 call but Y2 is dead. Let me get my meter out. Maybe we're off on uh, lockout? Well yeah, maybe we're off on lockout. All right.

If we come over here from X to C and get 26 volts. meaning that we're off on compressor lockout for that second stage because the first stage was calling and I disconnected it at the thermostat wire. So um, yeah, I don't know what's going on with that, but that compressor certainly looks like garbage. All right, let's see how we're doing on defrosting.

These coils should be moving pretty quick. This one was just the bottom half, leading me believe that it's like a refrigerant issue, so we'll let that run. Let's go over here and see what this guy looks like. Shouldn't take long because it's damn near 100 degrees outside.

so let's get in there. All right, we are back. I Actually have someone doing the preventative maintenance today too, so I had him just go over the AC It was still a little frosted up even after we came back, but we got a nice tight belt it's been set up for defrost. I while I had all the panels open I made sure that the drains are clear so we're good.

I Had him disconnect the compressor contactor and let it run for a while again. but this is good now. so we're gonna go ahead and put all the panels back on and we're gonna probe up on it. I Got all my stuff right here and we'll see what's going on with it.

Oh boy. So I got this guy running. look at that sub cooling buddy. Granted, that's discharge pressure, but this guy's screaming plugged up fixed orifice metering devices so super high sub cooling.

Super high superheat head pressure. It's a little bit lower than it should be, but a six degree evaporator temperature. Yeah, that is not good. So let's come on over here and have a look at this guy.

It's running. But yeah, let's open this guy up and see. Oh yeah man, and because that sub cooling's so high I don't think that uh, it's gonna be a low charge issue. So we've got plugged up metering devices on this guy.

Not really much more I can do it's running. It's going to ruin the compressor, but I'm gonna have to leave it running because they need something. That's a bummer. Well, I'm gonna start wrapping this one up I'll get all the information off of it and then we'll uh, jump onto the other one.

All right. I'm probing up on this other unit. This is a I think it's a 10 ton I'll find out in a minute. First off, I'll tell you that someone's got the wrong compressors in here.

You have a Zr57 and a Zr61. Um yeah, I don't know I've seen the previous company to me I wasn't doing this restaurant in 2017 and uh, they um you know. what's weird is if you look on all the compressors here, they had a crap ton of compressors all changed at the same time here, which just that's a whole problem And this customer does good maintenance too. So yeah.

anyways I'm not gonna go any further with that, but um I'm not even gonna bother doing this one. In fact I disconnected that compressor. look at those terminals looked like they were like condensation or something. I Don't know.

but the fact all that right there, all that overheating on the top of the head of that compressor and the discolored sticker. this compressor is ruined. There's no way that the the insides of that compressor are in any kind of operating shape and if I try to run it, it's just going to end up grounding out. I Guarantee it.

So this compressor is dead. Um, clearly this thing's been overheating for a long time, melted all the paint off, and then it looks like there's a leak right here because there's oil everywhere. so that guy's dead. But we're gonna definitely try to do this one and see what's going down with that.

So I gotta hook it up here in just a minute. I think I've got all my probes on it and I just got to profile the system and then we'll start it up and see what's going on with this one. this one. R22 It's looking like it's the same thing.

have pressure slowly building, but it's kind of looking like it's a plugged up metering device on this one too. So those have the fixed orifice metering devices and I don't care I have never had good luck cleaning those and then once you autopsy one, you realize there's a double orifice in there. so it's like almost impossible to clean. But yeah, look at that sub cooling.

It's climbing because it's it's stacking up in the condenser. We'll let it run for a few more minutes, but I'm pretty confident we've got a plugged up metering device on this one too. All right, this guy's just getting worse and worse by the minute. Look at that.

That's crazy. Look at that sub cooling 30 degrees. It's just getting worse. Um, how in the heck is my suction line 86 degrees right now? Is that really accurate? My liquid Line's 80 degrees.

Let's go make sure we didn't cross those up. but I don't think we did. Also, uh, you can clearly see the metering device plugged up. See all that frosting? That's not good.

Yeah, suction lines right there. So oh yeah, that suction Line's warm and liquid line is right here. Whatever. that's the right one.

But yeah, so this guy's done too. So we're gonna go ahead and take everything off and talk to him about this one too. Well, today, we've got a big job for this. AC We have an evaporator, two compressors, a drain pan.

this guy has got a grounded compressor, and then the other one has a plugged up fixed orifice metering device. And you know the two compressors that are in there aren't the same compressors now. The capacity is just slightly off, but still, we're going to go back with the proper compressors in this guy. two new dryers, new evaporator.

Hopefully get this thing all dialed in and then we've got to do that one next. But right now, let's focus on this one. Every time we do one of these, there's some sort of damage to the evaporators that we order even though it's in a pallet. and it's so frustrating.

So frustrating because it has to be in the palette to get it on the roof the way that we lift it so you don't want to uncrate it. But then you open it up. So look at this one. First off, there's this.

Now, it doesn't look like it hit the line, it just looks like it hit in between. So I don't think there's a leak there. but this is odd because look right here, that's a repair. Notice how all these other ends have straight tubes and this one has a braised tube right there that was repaired at the factory.

That's odd. different. Um, the first stage which is the bottom or I think that's the first stage I Don't know. This side right here was in a vacuum.

This side was not so frustrating man. I Don't know if this thing has a leak or not. I Don't see any damage over here. It looks fine, so it makes me wonder if they didn't vacuum it after they made that repair on the return bend over there.

I'm hoping that's what it is because I don't see any other damage besides that. I don't understand how they can't ship these things correctly. Like look at the top of this. Every one of these that I've been getting has been bowed so that puts pressure on this side of the pipe coming through and on this side, unusual pressure.

The other side of the coil doesn't look too bad. There's a couple little dings. this just came out of a pallet. Like you know, so all this stuff happened at the factory and that's beyond frustrating.

It also sucks too, because this has been sitting at my shop for probably two weeks because we picked it up and we didn't have time to do it. and then now we're inspecting it right? and now we're on a roof. We've already taken it out of the pallet. You know if I'd have seen this damage from the supply house? I'd have told them no I don't want it.

but now we're kind of stuck with it. So look at that. Yeah, like that's a factory. That's ridiculous.

That's a factory braised joint that's like an idiot in a factory that doesn't know what they're doing I don't even trust that. That's ridiculous some people, right? I'm very disturbed and frustrated with that. so I'll probably sand that up, clean it, and reheat it up. Get it to actually suck in like it should.

It doesn't even look like they're really hold the goober. and I'm not worried about a big goober because I do that all the time. but it's like get it to pull in. you know? I'm gonna have a feeling that at the factory so they jammed it into something right? because that's why they fixed it because we don't really want to braise on this right now.

We're just doing nitrogen regulator and just trying to hold the pipe and spray it with soap bubbles and we're not seeing anything. So and we're not hearing anything again. That's not a perfect leak test, but I'll just make sure that I sand this up right now and Heat this up and get it to pull in better and do a better job of raising that. and then we're just gonna hope for the best.

Got plenty of Steel bristle brushes for the drill, this one for the drill, and then for the Milwaukee die grinder tool or whatever Dremel tool. A couple different ones. so we're gonna get in there and get it all cleaned up, assess it, and embrace it. All right? Got it cleaned up as best as possible.

polished up so we're gonna grab I put the smallest tip we have a zero tip. These aren't my torches, but we got a good zero tip in there and we're going to heat this guy up and just get the solder to pull in a little bit better. Um I don't think like I don't think it's gonna leak but it just doesn't look great so we're gonna make it look, you know better. I've got some nitrogen flowing through but before we float the nitrogen, we went and blew it out, pressurized it when we were just kind of looking for the leaks from each end to make sure there was no debris in there, right? That worries me.

and then now I've got the smallest tip I have and we're going to braise this up real quick. Not my day huh? Foreign ly heat it I Wouldn't be surprised if it doesn't flare up, just want to get the solder to flow. There may be enough solder seats already flowing. gonna get these goobers to pull in just getting it just Feathering it trying to get it to pull back.

Remember the solder is going to go where the heat is and I'm going to get rid of the excess solder Here we go. I Like that joint a lot better. Now we'll just heat up the bottom, make sure that's nice and good solder on there, foreign, cool it off with the oxygen. remember we are flowing nitrogen I Feel much better about that joint.

The solder is actually pulled in like all the way on the bottom. You know again I Don't think you think you're gonna leak where it was at but it just looked like crud so got it dialed in. a lot better. so hopefully that should be good.

I am just utterly frustrated with this. So I polished it up a little bit looked at it but the more I look at this. This right here is like it's not a swage joint. It's like they just butted this up against it.

I Don't think that's inserted into the pipe because down here swear it looks like they just put a piece of copper there. embraced it man. I Hope there's no restriction inside this guy right here. but I mean it's better than it was and it looks like it's sealed so let's hope there's no leaks.

So I was mistaken. um I Thought this one was grounded and it's not. It's just a bad compressor so that kind of makes it a little bit easier on the cleanup process because I thought it was completely void of refrigerant and then we would put the gauges on and it still has plenty of gas. It's not burnt, we checked it to ground it's not grounded so it's just a bad compressor.

but look at the head you can tell that thing's been overheating. So this one I know for a fact the evaporator has restricted metering device in it and this one more than likely the same thing. So that's why we're changing the whole evaporator. We're changing both compressors um and going from there so we pretty much got the unit apart.

We just need to finish recovering the last one. We can't really pull much out yet, but the whole thing's in pieces. You can clearly see where it's been icing up down at the bottom. All right.

Well, we're gonna pull the whole condenser too. but again, we gotta wait for that to finish recovering. So while we're waiting, we got two vacuums going. Get out most of this big stuff.

it's not going to be perfect. You know this unit's a junker, but at least we can get some of that some of the stuff going. See something that's going down in the Ducks though, too. So we got to be careful.

But seeing right now we just got a big old pocket of oil. There must have been shoved in here because we evacuate or we recovered the gas. but we pulled it off and shot all that oil out and freaking just blew a smoke cloud all over the roof. Scared the crap out of us.

But that's why you're always prepared for this stuff now. I Know they say don't unsweat things, but sometimes you have to. So just going slow. being careful.

and always be careful too because that oil can ignite, especially in the system. So flame outs are a real thing. and this is where mixing refrigerants and different things can get Kind of scary because if you use A2l refrigerants and uh, see yeah, you're gonna get a flame out on that too. Something's going on we gotta.

We gotta pull the core Max Go ahead and stop and let's pull the core Max fitting. Because we're building our pressure and you know what it is. it's the Restriction The system has a restriction. Even though we pulled it down, we got a build up and so when we're trying to undo this one, we're getting a build up too.

So so we pulled the top off the dryer so that way we can relieve pressure. We pulled the coremax fitting out which we had to depressed but I think still seems like it's getting something. It's weird. Watch out.

This might be a don't breathe. All right, let's stop for a sec. I Think we need to go ahead and undo the compressor bolts because there's too much tension. This isn't gonna work here.

Yeah, probably pull the compressor out of the way to relieve some of the pressure off that guy. Now here's the deal. Why are we unsweating these things? Well, because we don't want to have to add couplings in different places. So yes, I Know it's a good practice to cut lines, but when you're dealing with stuff that's like critically piped and there's not a lot of room in there, it's like, why not just unsweet it? So that way it goes right back in.

That's why we're doing that. so. but obviously sometimes you have to stop like this one. We're still got refrigerant boiling out of the oil and that's a little frustrating.

So all right, let's see if we can double team this. Try not to breathe All right. careful. your towel's on fire.

Keep eating. Now there we go. Good gosh, was that a difficult thing to get undone? Kind of looks like it broke the line a little bit too. never easy, right? In hindsight, it probably would have been easier just to cut it, but sometimes we're stubborn, right? Keep moving your torch around.

get around this side. It needs heat. There you go. there, you go.

all right. Move it around the other side. I Think you need to increase your Flame But no, not like that. Let's relight and let's try again.

There we go. now. we can actually get around the pipe and let that flame crawl around. Okay, bring it around this way deep inside down there you go and then just keep it right there.

Yeah, it does look like you're running out here. There we go. There we go. we got that off and last one's up on the top.

All right. Same thing, just kind of. Bring It Around We are running out, so hopefully we get this last one because then this evaporator can come out. I Don't think it's gonna work? Yeah, you're dead.

We're done. We'll have to get into a settling and oxygen. We have a couple people on this job so we can move through it. Um, another thing is pretty common on these units.

They have Zone sensors for the thermostats are down in the ductwork and this one was run through the compressor section. That's really common on these and I don't like that. So given the opportunity I like to move the Zone sensor. so we're going to move it over here and we'll run it.

you know, this way around into the where the economizer wire used to go through here and then down into here and we'll drop it down that way. So I'm gonna get some thermostat wire but I pulled out the old stuff. it was connecting right here. That good? Um, and we're just working on getting everything undone.

We'll get the evaporator out in a minute. Now in the bigger evaporators I tend to find that most of the time you don't have to cut them and the smaller evaporators. everyone that I've done, the metal is too wide and the copper lines hit the side of the unit in there. so I'm hoping we don't have to cut this one and it looks like I still got to get some screws out of there too.

Got the evaporator out. We got to be very careful, but we're going to pull the drain pan out right now. Whenever we do these. we change the drain pan because it's a lot easier than when the evaporator's in there.

And these drain pans? they always crack when the fiberglass gets old. So we're going to swap that out then start building it back with the evaporator. I don't know I'm gonna take a couple people get it put back in. it's not like the other ones because if you look it's like it's I don't know.

we're gonna play with it some more. but I think I'm gonna have to cut it because it's hitting the lines all on the sides right there and I don't want it to hit. So I'm gonna try again to see if I can pop it into place. but I think we're gonna have to cut this piece which I've had to do on the smaller ones where you cut a straight line down the middle that stinks.

Take the inside lip all the way down and all the way up off and it'll it'll work. Got this dye? uh, whatever you want to call this all right? I cut a good chunk off of both sides so hopefully it fits now. All right, so that is much better. It actually like clears now and doesn't hit.

so we ran it all the way down each side. so I'm glad I cut both sides. it's all screwed in. We sanded this up so we're going to get ready on doing the suction line piping to the compressors and do all that and then we'll put the condenser in last.

All right, we are going to braze in this section right here. So we're putting a suction dryer in and braise this. We are purging with nitrogen. Um, and we've got the Viper wet rag the heat blocking compound by Refrigeration Technologies on here to try to help from burning everything up.

So we'll do that part and then we'll do the other suction line and then we'll put in the condenser. And you know, doing all that other stuff so a little bit at a time. All right, we're just getting fitted for the second one now. We often will use props and different things because everything wants to move right.

So we've got some Nitro flowing again more the Viper wet rag on this one. This guy's all all done and in right suction line. We haven't done any liquids or discharges. Oh yeah, that's right.

we got to pull this cap off because we want to relieve the pressure. Now we're just using a tiny bit of nitrogen. it's on the braze function and it's just slowly moving through the lines just to make sure we do our best to clean everything up, you know, and protect it as much as possible. So we're going to start with this one because this is kind of a cruddy joint.

We ended up cutting it short because it had broken when we were trying to unsweet it, but it all worked out. It worked out because we ended up putting a suction filter in filter dryer. So we ended up cutting the line shorter and we were able to make up that difference when we cut the suction line. If you're very careful about it, all right, let's get to braze.

Okay, we got the compressor in cooled so now we're just going to do this dryer real quick over here. and then this last one. So we're doing it in baby steps and we makes our life a lot easier. Okay, and so over here while that's being brazed in, we've got the evaporator filter rack back together.

We'll throw the filters in right now. We got the whole side panel back on. You got to be really careful with these because there's a bunch of screws right? and they go right between the copper tube so you don't want to use like a long screw. You got to use the right screws.

so we're going to put a couple more screws in there drain pans. All good. We'll definitely be running some water in it and flush out the big chunkies. We tried to vacuum as much as possible as we were going, so this is all back together back in here.

It's really important to get these screws back in. Those are tricky screws. There's that cruddy spot. but I think we're going to be okay.

So yeah, we're moving along. Everything's looking good so far. Getting ready to put this condenser back in, but we're going to give it a rinse. It's not really dirty, but we're still going to give it a quick little rinse before.

but we got to be careful not to get water. so we put some caps on the dryers and then we'll get it over there and get it all braised in prepping the condenser. Now we got the old dryers pulled out. Um I think it goes like this I Straighten everything out.

we'll secure everything there. You can see that there's some goobers and stuff from Salt but that's okay guys. it doesn't have to be perfect. that's just from excess solder.

Because trying to braise these things in place, it can be difficult, you know? So it is what it is I Mean, you know, Yeah, it may look ugly, but it's not the end of the world. Now if if it was on a braised joint, not pulled in like on the evaporator, that's when I get concerned. But if it's just from someone just trying to braze a dryer upside down, it's not a big deal. and then when I go to do this over here, we gotta switch the braising to this.

Okay, we may even be okay where we're at I'll probably have to have you like push that when I braise this one. but I'm gonna do this one first. So where are we connected? Okay, uh. torches in through here Shady Yeah, no a wet towel can you give me my lineman pliers? Just tap it in.

tap taparoo. Tap it in. It's time to go to your home. Yeah, are you too good for your home? Your gloves are on fire.

Is that good from that side. I Can't see? Yeah. plenty of heat. I'm gonna get rid of that big old pimple.

This is good Over here. Okay, what's next? Uh, get that discharge line moved. Yep, the position it out of the way. I'll do the dryer real quick which should be this one right here, right? Yeah, the first stage.

hold on. you. See the this one should be good. I should be able to do this because the Nitro is still in there.

Can't see that. Is it good? Uh yeah. I'll probably give it a little bit more solder. Is that good? Yeah.

I think you got that. U-Box Look, look for good? Yeah, okay. our discharge them right? Why don't we? uh go get vacuum pump rubber from my van and extension cord and True Blue hoses. I Already got an extension photo.

Okay, so True Blue Hose is vacuum pump? Well, vacuum pump too. Yeah, we'll do too. Let's go down with them. Does yours have a double for the extension part? Yeah.

okay. tell me to go down. I Want you to hang just for a second and make sure I don't need your help. Solder you gotta pulling down? Yeah all the way around.

Yeah, we're good. Okay, you didn't open up right here. Put a lid on that corner. There you go.

Okay got that guy. that guy and that guy. He got top of the dryer. So now we need to switch the Nitro over other side.

Um, where are we going to put the Nitro on this one? I Guess this is not up yet. That's why I was like confused. Okay, so this is up. I'll probably just have to have you push like up here with something.

Yeah, maybe even my channel locks or something like alignments and then I'll do that one. to do that, one should flow there. I say just put it on this. Okay for now.

Yeah, a minute when it comes time. Okay, so I'm just going to hold that. I'm not going to want to. You're going to want to use this.

What about the channel? I think I could grab it better. Just be careful when you're grabbing it because it, uh yeah. it squishes. especially.

It's just I'm just gonna use it to hold it. Okay, that's good. I'll do this one first. Probably put it right where this is because there's more rigidity there.

You're more or less just pushing. No, no. I would do it back here. but you're just pushing is all you're doing.

Dude, you're not even holding so just keep pressure flowing over there. What's that? Seems like it's flowing over there? Yeah, yeah. just hold it. don't move.

It should be able to let it go. Okay now I need to do this. Top one. Nitro's still flowing.

Thank you very much. All right. everything is braised in I think so. We did a lot of stuff.

We ended up adding liquid line ports. by having those, we can get a true subcooling and also it gives us the ability to pull a true evacuation not having to use the high flow Schrader Course We went ahead and replaced the high flow Schrader cores, the coremax fittings so we'll be able to pull down on the suction line, filter dryer, and the liquid line. Port Everything's good. I'm going to hang in here until we do a pressure test just to make sure in case.

I Gotta braze anything but we're just kind of in cleanup mode and then we got to fix all the thermostat I mean the pressure control wires that I cut and all that good stuff. All right. We went ahead and did a pressure test, didn't see anything wrong the pressure test. So now uh, we're doing evacuation.

We're gonna take lunch and um, well, two of us are going to take lunch. one person already did. That sounds really loud. Why? It's probably because I have the gas balanced open I'll have to look into that.

That's a little funky, but um, yeah, we're uh, just letting the vacuum run now. So we've got Micron gauges over here. All right. the evacuation is done, everything's looking good.

no big problem. so we're going to start unhooking that we're assembling the unit. We ran the new Zone sensor over here and uh, we're gonna start getting ready to charge this guy up. Um I've got about six pounds of gas in this one.

We are using the recovered R22 but we're running it through a filter dryer just to be safe. Um, yeah, so we're just about done. This one takes something like nine pounds so we're putting it in through the high side, letting it take because it looks like it might be taking about as much as it can and we may have to switch over to the other side. We're currently wiring up the pressure switches that I disconnected and then we got to wire up the compressors and then we can do the startup all right.

Got the compressors wiring cleaned up and got them wired in where I think it should be. Um, we got the con, the pressure controls all connected back in. Uh, we need to check phase rotation now. So we have our indoor blower motor I disconnected compressor contactors and the indoor blower contactor by pulling the coil voltage.

So when I turn this on, nothing should theoretically turn on. Let's see if that's accurate though. If I can get this to go in there, there we go and uh, see what happens. Okay, nothing's on now.

what we need to do is just bump the blower contactor and it's going in the wrong direction. I Think Wait, we didn't change the blower though. No, that's the right direction. Yeah, so blower is good, but we never changed anything with the blower contactor.

That's right. But what we do need to do is because we have the unit off. They have customers in the building now, so we need to bump that by hand and have someone downstairs on the phone with me let me know if there's dust blowing out. But the next thing, let's go ahead and bump the compressors.

They both sound decent. I Don't really see any problems with the way that they sound so they don't sound like they're going in the wrong direction or anything. So okay, we're going to finish putting it together. we're gonna bump the contactor for the blower and then after that, we'll uh, we'll fire it up and test all the stages we got to finish charging this one.

This one takes another two or three pounds of gas so this one took the whole charge. All right, this is looking pretty darn good. so we got both of them charged to the factory charge. Um, we are running lower than normal pressures and obviously I have a panel pulled off right now, right? But it's also 64 degrees outside right now so we don't have a very big load inside the building.

I Have it jumped out with both compressors running, but it's looking great. Saturation temperature is low, right? but that's gonna happen right now. This one's pretty low too. This one's at 33 and it it's a fixed orifice metering device so it takes a few minutes for the pressures to build up.

Notice, look at, we're Rising right now. These things always do this. They start out low and then they slowly start to build up once the Um condenser loads up and everything. So we're looking good.

So far, we're going to let it keep running and we'll probably probe up with the Job Link probes and start cleaning up all our messes. So this particular job, we've got a bunch of trash over here. We have an evaporator. We have two compressors.

We're actually going to be coming back for that because we have another job for that little AC right there where we got to do the same thing evaporator compressor. It's a whole thing. so we got to come back another day. Lift up the equipment for that other.

AC We'll take down this equipment, but we'll just clean it up. so that way there's not a big mess up here and we're looking pretty good so far. So condensers, you know, pretty beat down. You know, in a perfect world they change this unit, but we couldn't get a 10 ton unit right now.

just can't find them. So right now I Just turned it on about two minutes ago so it really hasn't stabilized out too much yet. But so far we are getting an accurate true subcooling reading because I added liquid line pressure ports. Okay, so circuit one does not look too bad now.

notice our saturation temperature is low. it is going to build, but also there's not a very big load in the building. Notice that we're within range, right? because there's not a huge load. Okay, so we scroll over.

I mean it's 63 degrees outside and it's 64 degrees return air, so it's there's no load, right? so that's expected. Temperature splits about 22 degrees so that doesn't seem too bad. Okay, let's scroll over to the second stage second stage sub pulling. Still kind of high, but we're going to give us some time to stabilize out again.

Um, and it's dropping slowly so we're gonna let it run for a little bit longer. but I mean it's not scaring the heck out of me yet. Airflow seems about where it should be. It's a 10 ton unit delivered capacities within range.

So yeah, we're looking good. We're just gonna let it run for a bit. So at this rate we're gonna have to wait till it's a little bit warmer outside because we have no load. My saturation temperature just keeps dropping.

we're at 28 degrees, but we're looking good as far as sub cooling and stuff goes. So yeah, I'm not too worried about everything. Super eats. A tad on the high side, but again, we'll analyze everything later.

but it's like night and day. I mean both compressors are running. They're going to be a okay, super stoked and like I said, the temperature split across the unit is decent. Yeah, um, they.

I will say one thing too is I'm pretty sure that our return air Grille downstairs is really dirty because I was looking down through the Ducks and it looks like it's real dirty so we'll definitely have to address that on a PM or something too. but that's pretty much going to be it for this one. I Mean there's not too much more we can do, especially when we don't have a load on this building and it's so cold outside. It's weird how two weeks ago I was in the 90s and now it's 60 something degrees outside.

Kind of crazy, but polishing a turd right? it's better than it was and uh, it'll probably last another summer. All right, let's wrap it up. we'll hand the keys to the customer and we'll catch you on the next one. That one was a long time coming that AC had been down for quite a long time and this was, uh, done.

Let's see it is now February 28th of 2023 This video was filmed I think back in September of 2022. So um, it took a while to get all the parts. the evaporator and stuff for this unit took a couple months to get it. You know shortages and all that stuff and you know I know a bunch of people are going to be asking why did I use R22 Why didn't I use an alternative Okay, right off the bat this last summer I started using 407c I do a lot of these carrier package units I did actually probably five or six of these identical repairs where I'm changing evaporators because the fixed orifice metering devices were plugged up and you know all that stuff, right? So I did several of them where I used a 407c and I ran into a lot of problems Now I realize it's probably just to do.

In fact I'm know it has to do with the fixed orifice metering device and the high ambient temperatures. but for some reason when we get above 110 degrees ambient the the 407c, the way that it operates this unit Falls flat on its face, we start blowing fuses on the unit because it runs high current under heavy load situations. Okay, now as far as charging the unit with 407c I charge to Target superheat just like I did on this one. well actually this one I waited in, but you use Target superheat because it's a fixed orifice metering device and obviously pay attention to all the other vitals.

but I ran into a lot of issues. so this was the last one of the year that I did these big repairs on actually second to last one and we decided to use Go Back with R22. So we cleaned up the R22 from the operating compressor and then we had other R22 that we used for the other compressor in here. Okay, now just because it is, you know that's what works best in these units now.

I Have used 407c in several units with Txvs works just fine. No problems, but something about the fixed orifice metering devices. when it gets above 100 and 510 degrees, these units start blowing main fuses and they just run really high current. They run perfect.

You know when it's below 100 they run Perfect all day long. They're great, but to make it through the summer on several of them that I did the conversions on I had to run misting devices just to get through the rest of the summer and then as we come into the next, uh, spring summer, we may have to go back in with our 22. Now I'm not a huge fan of using alternative refrigerants. It took me a long time to start using 407c and then I even ran into problems with these ones.

So it is what it is I Realize some people love different alternatives to R22 I Personally don't believe any of the stuff that the manufacturers tell you of those refrigerants where you don't have to do oil changes and stuff. I will argue to my death that if you go into the manufacturer's installation instructions of all those different refrigerants that they say you don't have to use Polyoester oil with in the fine print, it says in certain situations it's going to be best to use Polyoester Oil okay in one way or another. They're going to say that in the fine print because they themselves know that yeah, they can add a hydrocarbon to their refrigerant to make it work a little bit better, but in certain situations it's still best to use Polyoester Oil. To me, that means if you are going to use an alternative, always use Polioester oil.

Don't mess with the mineral oil the trying to convert using all these different refrigerants. I'm just not into it. Okay, so it is what it is now. We went ahead and basically rebuilt this unit because we could not get a replacement unit at the time.

We were having a hard time finding the 1010 package units. Okay, so we went ahead and put a new evaporator because the fixed orifice metering devices were plugged up now. I Know there's going to be a bunch of people out there saying how come I didn't clean the fixed orifice metering devices. There's a method and I've tried it I may even have it on film or something, but there's a method where what you do is you pressurize one side of the system with really high pressure nitrogen and then the idea is is that you heat up the fixed orifice metering device and I Guess the theory is is that you're going to melt whatever waxy buildup is inside of there and it's going to push through the system.

I've tried it and I personally have not had good experiences with it. Okay, it's never really worked right then. what I did was one time and I have it on video too. I took one of these evaporators after I got done changing it and I cut out the fixed orifice metering device and I found out something that blew my mind in the fixed orifice or the accurator metering device.

For this particular carrier package unit, there's actually two orifices literally right next to each other two orifices. So the refrigerant goes through one orifice, then it goes into a little cavity, then it goes through another orifice. two separate orifices in this in each accurate or metering device in this unit. So this has a liquid header on it and it has like 15 or 20 different circuits right going off of it.

Each one of those has two fixed orifice metering devices in it. So let's think about this if the theory is that we're going to heat this up and put high pressure nitrogen on one side and we're going to blow out whatever's inside that metering device. Once it goes through one orifice, you're going to have some sort of a pressure drop and then it's going to have to go through another orifice. The odds of you pushing something through the system through two orifices is dang near impossible.

Then on top of that, let's think about what usually causes these metering devices to plug up and usually in my situation it's not from brazing, it's just from poor maintenance on the equipment, overheated oil that is just lined the walls of the liquid line, and it starts to restrict the metering device. Sometimes there's sediment and stuff, but majority of the time it's just bad oil that's been overheated that's just flowing through the system and it's just causing issues. Okay, so personally, I don't see any good I don't have any good luck with trying to clean these fixed orifice accurate and medium devices more power to you if you can do it. but I just don't see it.

So I'd rather just change the evaporator. they also make you can order just the liquid header. But really, when these evaporators are as trashed as they are, why not just order an evaporator? The customer's paying for it I quoted it with a new evaporator, lift up the evaporator, put it in, be done with it right, and then no questions asked. So went ahead and changed the evaporator, put all the dryers and necessary stuff on the equipment when we started it up.

It was kind of cool outside in the 60s, so the system seemed to be operating pretty decent, but we had low load conditions. You know, we really haven't had any complaints. We did have some more heat waves after that and the customer was super stoked with how the unit had been working. But other than that, that's it.

We did our best. Um I Appreciate you guys making it to the end of the video. Thank you so very much! I Mentioned at the beginning of the video that Hats are now available again on the website. If you guys are interested, go to my website: Hvacrvideos.com Great way to support the channel.

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