I really don't understand. I i didn't even realize this - why they didn't take this old receiver out, it's flange mount. It's got four screws holding it in seems kind of silly why they wouldn't have taken it out in the first place, the previous people. This video is brought to you by sportlin quality, integrity and tradition.

The customer's complaint today is that their walking cooler is not working. This is their walking cooler, so i turned the system on and i noticed the side glass is flashing very violently and i haven't put gauges on it yet, but i just peeked back here and there is oil all back here. The whole line is covered in oil, so we know we have refrigerant leaks, yeah this thing's a mess. This looks like we're gon na need to fix this.

I'm not gon na fix it today. So what we're gon na do is uh. If i can, i'm gon na try to get away with just putting gas in it for the night. This is towards the end of the day and i have a live stream to do so.

Let's see, though, but we got to make sure i will in any moment cancel the live stream. Oh that scared me. There was a spider web i'll cancel the live stream if i have to, but i just need to make sure it's not going to leak out. It looks like the leak might be down here.

It's pretty wet right around that head pressure, control valve dtc, valve's, working on that freezer, compressor yeah, it's really wet down in here up in there. So i think i can get away with putting gas in this guy. Okay, um. Also, in order to shut this rack down, i had to turn off uh their ice machines because they're piped into here, so you always got to be careful turning racks off.

What do they control? What's the repercussion, so i shut those down and then shut down. All the other equipment that way i can get in here, it's kind of a pain. I've never worked on this walk-in cooler um, so we're gon na probably need to do some cleanup get it all fixed looks like the vibration absorber might be leaking too. There's a lot of oil there so we'll probably have that in our quote, for a new vibration absorber and then do a re-pipe and clean all that crap up again, where i'm at right.

Now we actually don't even need head pressure control valves, so i might even just take that out of the picture. I mean i don't mind having them, but we don't really need them per se out here on ice machines. You do but yeah everything's, that's another compressor. Okay, i'm just kind of looking at everything else in here this one uh.

If you guys recognize, i did a late night walk in freezer took me like all night. I left it like three or four in the morning. This is a video like six eight months ago, something like that. Just trying to identify this lake - and i get down here to see how wet that oil is and oh look, nothing's even secured.

No wonder it's got a leak nothing's secured at all. That receiver is just sitting there and all these lines are just sitting there. Nothing all right looks fun: okay, uh, we cleared the sight glass up, it took about four pounds and then i added an extra two pounds as a guesstimate for the head pressure control valve. I don't think it's going to bypass right now because we're in the middle of summer anyways, but i added the gas just so that i wouldn't have an emergency call in the middle of the night um.

We are going to come back, but i want to do a quick leak check and see if we can figure out where this guy is leaking. It's definitely something right there and then let me twist back this way. You know it looks really bad back here. I'm not picking anything up literally picking it up right here.

Okay, let's go down here! Also, i walked into the evaporators and the box itself to walk in the evaporators are filthy, so i want to do a leak check down there too. I'm gon na get some bubbles on that guy down there. Some big blue right here i go on a stream setting like that and let's get it down there and see. Okay, so you've got a little hairline crack right there, big blue is picking up it's a little guy.

I think that i'm gon na be okay because they want me to quote this too. If possible, i mean i have approval it's an emergency, but i think we'll be okay, all right. We got an idea there. Let's see, i'm not just gon na quote fixing that, because this whole thing's a mess.

I have a bracket to set that receiver on to bolt it down properly and then we'll re-pipe. This, because they've got pipes rubbing against crap, it's a mess and then we'll change that vibration eliminator. But we got to clean the evaporators first see if we got any other issues down there, so this guy's actually leaking right here too right on this packing and i tried grabbing it with a um. I can't think of whatever you want to call it the thing that has two forks and you twist it like a clip, retainer screw thing or whatever.

They also have a packing tool, but um, it's not tightening, so we might have to quilt that receiver. I'm gon na try one more time. I think i might have one more. I might have an actual packing tool in my van.

Let's see if i can loosen that and tighten that um, if not we'll, take down this information and we'll make this part of our quote all right. I'm gon na turn this guy back on, tighten everything up, and then this should get them through the night. We were back this morning. I came out it's uh saturday morning, i'm behind so i came out to do this on a saturday just to get it done.

I'm gon na go ahead and start with recovering the refrigerant. We got a new receiver, we're gon na re-pipe. We've got a new head pressure, control valve liquid line, dryer side glass, and i picked up a new vibration eliminator for this line right here. So all right we're getting set up for recovery right now, uh we're hooked up to the high side and the low side on the compressor got the recovery machine.

The scale we're gon na zero out the scale. I dig how you can get the weight on the handle and you can get the weight on here. I like that, because uh redundancy that way uh if something happens, to either one or something like that you've got the weight on both. So i dig that all right, so we're going to purge the system so we're going to open up the high side - and i left this loose that way.

We've purged all the gas and we've got clean, and this is already a recovered cylinder. So bam super easy to do it that way, all right with that being said, scale zeroed out scale, zeroed out we're gon na open this guy up right here. Let the system push in what it can just via the pressure in the system and then i'll turn on the machine and let it run uh. We got to be careful not to let the machine run into a vacuum, because the system has a leak, and i want to try to reuse this refrigerant uh, the fractionization, i'm not too worried about it with 404.

So we're going to try to reuse what we can possibly we'll see how it goes when all is done, all right, that's pretty much it we're going to hit start all right, we're good and i'm going to start prepping everything sanding everything. Okay, i recovered right about 10 pounds, 10 pounds of gas, so we're going to go ahead and uh, take the recovery machine down and then start bringing up the materials. Before i cut anything open, i'm going to bring up all the parts the new receiver make sure. I have enough copper because i don't want to get in too deep and then realize something's wrong.

You know, so i made a mistake and i didn't have as much copper as i thought. That's going to be very close to do exactly what i want to do. So i may not be able to completely re-pipe this the way that i want to, but i'm going to try to do as much as possible. So it's going to be tight, i'm going to get in here and start demoing everything just getting the receivers out.

Everything out and then i'll start assembling it get a nitro purge and then we'll start brazing. I'm trying to leave the rack running as much as possible, so everything doesn't come up in temp. But obviously i need to get in here and get my head going in here and i'd rather not have it super close to the fan blade. So i shut it down temporarily, i'm going to get in here and demo some stuff and then i'll turn it back on and let everything run again just kind of do it on and off a little bit here and there i really don't understand.

I i didn't even realize this why they didn't take this old receiver out. It's flange mount. It's got four screws holding it in seems kind of silly why they wouldn't have taken it out in the first place, the previous people all right, i'm realizing that i'm not going gon na. Have enough copper, like i said, to do what i want um, but i'm just gon na eliminate the head pressure control valve.

That was. My initial plan was taking it out of the picture because we really don't need it. So i'm gon na go ahead and do that and then i should have enough copper, so uh discharge, line's, going to go straight into the top of the condenser liquid line comes out over there goes into the receiver comes out of the receiver goes through. The dryer connects to the liquid line going downstairs, so i'm going to go ahead and get this guy bent up right now.

This is going to be my discharge. Line going out got a giant mess going on, but we're all piped so swaged over there into the receiver coming out. The back of the receiver swaged right there and then over here we're swaged going up right there and then coming into the vibration eliminator up into the compressor. So i'm going to open everything up, get a nitrogen purge going and we're going to braise this guy up.

We're going to take some nylog assembly lubricant loosen up the flare nuts, i already uh put some on the dryer, so that's good! So essentially you want to put a little bit right here where the flare touches on the bottom. So this bottom part, when it seals, is going to be all the way up here, put a little bit right there. So that way, it has a smooth surface to spin on just put a tiny bit on the threads right here and right here, tighten them until they're snug with your fingers and then we're going to torque them down now uh. Before i go any further, i never tighten the nut on the bottom of the receiver, so i need to tighten that on real quick before we get too crazy on this guy.

There we go so this bracket. I have them custom-made. We do a lot of receivers. Okay, now we're gon na torque.

These guys down do, as i say, not as i do and use a torque wrench all right. The flare nuts are all torqued down. I need to put some screws in this guy. Uh pull the evacuation and uh hopefully get this guy started up because i'm sure their walk-ins getting a little warm.

I'm gon na do a few things to secure some of the lines while i'm down there too so going ahead and doing a nitrogen pressure test. So i'm going to go ahead and hit enter and it's going to time it i'm going to start taking some things down. Getting the vacuum pump leak, detector refrigerant! I got a giant mess up here. I need to clean up so we're going to let the tightness test run, while i'm kind of cleaning up keep in mind on these really hot days.

These uh canopies really really help so it started off cool this morning, but by the afternoon it's supposed to hit a hundred. So this thing's good. You know that way: i'm protected from the sun, so we weren't holding pressure. So i went inspecting we lost 10 psi in 27 minutes, so i went inspecting everything and look at that.

We got a leak right on that guy. Now, let's see if the packing is loose see if that solves it, tighten the package. Just a little bit looks like that might have solved it definitely not bubbling like it was, so it's always got to be careful. Make sure that you uh have the caps on it's best to have the caps on when you're pulling an evacuation.

I was doing a pressure test, but yeah everything else looks good um. I soaked up all my joints over here too. Nothing so we're going to go ahead and hook up the vacuum rig release the nitrogen charge. All right.

I got some straps holding the lines down. There's one on that, i put one on the back of the vibration absorber so that way the vibration absorber, hopefully doesn't shake the discharge line over here. I don't have a method to secure these, yet i need to figure something out here because we don't want it rubbing against this, like it has so um i'll have to figure that out, but i did secure that line right there. All right, uh we're just pulling the evacuation.

It's going to be a while. It's like at 8, 000 microns right now. So this is a pretty big system. So i'm probably gon na have to change the oil here in a few, because it's looking pretty bad, but i'm gon na let it run a few more minutes all right, we're gon na do a quick oil change.

Super easy on this pump just open this guy up. Let it fill up close it. You don't have to stop the vacuum at all. Pour the new oil in easy, as that didn't even mess up the vacuum.

I went ahead and front seated the king valve on the receiver and in putting this was almost an empty cylinder. So i let it suck the rest of this end and then i'm going to go ahead and hook up my full cylinder and put as much as i can into the receiver. While it's still pumped down that way, the refrigerant's just storing in there and then once we get a little gas in there, we'll turn the breaker back on and let the refrigerant flow all the way back up all right. We've got a bit of gas in there.

Um, i got the other cylinder on here now i have the compressor contactor disconnected, but i have power turned on so that way the solenoid valve downstairs is open and what we're going to do is go and let the refrigerant flow through we're going to let it Come up into the high side and we're going to do a leak check, and if that looks good, then we're going to go ahead and start the system up and then finish charging it got a new spoiling catch all on there. Pressure control just kicked on looking good, i'm gon na go ahead and fire up the leak detector. Remember when we charge this one, because there's no head pressure control valve we're just gon na go for a clear sight. Glass now all right, so this guy should fire up it's warming up right now, let's just hit all my braze joints and my flares to make sure there's no leaks.

Looks good. Here, looks good! Go back in here! There's a braze joint right down here, nothing and last but not least, right down there. Nothing and we need to hit the back of this guy because there's a flare back here make sure there's no leaks on that flare looks good. Okay.

I need to put some panels on and start this bad boy up. All right. We've got vapor in the sight glass, it's probably hard to see, but it's just pure vapor we're gon na go ahead and uh clear that bad boy up now, this unit's under a heavy load. The expansion valves are flooding.

If we clear the sight glass when it's under a heavy load, theoretically, you could put too much gas in there, but we have an oversized receiver now that does not uh use a winter charge. So it's not going to be a big deal. If i go ahead and clear up the side glass, so i'm gon na keep putting gas in here, the head pressure was really starting to climb it's even still high, but once i i had to like put the panels on so that way, it wasn't bypassing. So much of the air, we are almost clear, still flashing, but it's it's almost clear.

I can tell so you see we're running 330 head right now, 125 degree, condensing temp, it's about 99 degrees outside right now, so not looking too bad. All right. Our system is fully charged we're staying consistent with, i don't know, just under a 30 degree, condensing temp over ambience, so at 30 degree td side glass is clear. Looking good on that everything's cool, i'm gon na, let the system come down and temp a little bit more and just kind of monitor everything we got a pretty large double coil walk-in looks like their thermometer says, like 42 degrees, i'll get mine in here.

In a little while - and i did get uh someone out here and they went through and leak checked, these evaporators and didn't find anything also had him clean them, while he was in there. So all right, i want to talk about the compressor superheat on this system. Right now, i just finished a system repair we're running 30, 36 degrees, compressor, superheat, that's real time. So it's going to change.

Okay, one of my evaporators is running 20 degrees. Superheat and the other evaporator is running 17 degrees, superheat, okay, the compressor superheat and both of the evaporator superheats all work together: okay, along with proper insulation, on your suction line. Now this is foam tape. This is not proper insulation, but unfortunately, because the way the manufacturer designed this system, i really can't get anything else, but foam tape, it's better than nothing.

Okay, because there wasn't anything on there. When i got here today now, i would imagine that we're running higher than normal compressor superheat, not horrendous. Okay, typically 30 degrees is the highest you want to see, but i'm not gon na freak out if we're at 35, 40. Okay, but you've got to look at a few things before you start going crazy.

Look at this vibration eliminator the vibration eliminator is not insulated, so that is basically absorbing heat, bringing my compressor superheat up now. How much that's questionable? Okay, but the moment that i start adjusting on my evaporator superheats, we are gon na change. The compressor superheat okay, now both of my evaporator superheats, are running a tail on the high side, especially since my system is at 34 degrees. My system is just about to satisfy right now: okay, um, i'm probably going to go ahead and adjust both of those expansion valves just a little bit to try to reduce the superheat, okay and but remember either way.

Adjusting the super heat more super heater, less superheat is adversely going to affect your compressor superheat. So keep that in mind all right. We have one of my expansion valves right here and we're going to try to bring the superheat down so we're going to adjust it. So i adjusted it four quarter turns down that's one full turn down and we're gon na.

Let the system stabilize out and see how it reacts all right. So now that i made those adjustments, my compressor super heats at 29 degrees right now, which is really good. Uh, i also brought the box temp up to about 37 uh because i popped the door open. So that way it wouldn't satisfy looks like i have one evaporator, that's at about 17 degrees right now, and i have one evaporator, that's at about 14 degrees right now.

So we're looking pretty good, i'm gon na let the system run a little bit longer, but i'm already extremely happy with that compressor. Superheat all right, i made another adjustment and i got ta say i really dig the fact that field piece lets you do. Multiple super heats so compressor. Super heats 26 uh, evaporator, 1, 16 evaporator 213.

We're going to give it a little bit more time to stabilize now it's really cool because, with the field piece jobbling system, i'm able to wirelessly connect to the walking cooler evaporator, that's below me right now: okay, i have the jl3 pc, temp clamps on each evaporator And that's how we're getting this measurement right here: okay and this measurement - and then up here i have field pieces, new, jl3, lc, large, pipe clamp. This can go on up to four and an eighth of an inch uh refrigeration line. Super awesome super cool, instant reaction. You can see right now uh here we go right here, we're at 28 degrees, so i open it up and we're going to lose, but the moment that it makes contact with the rapid rail technology we're going to immediately see temperature.

Okay, all right, i just connected it back. Uh looks like we're at 29 degrees super easy. So it's instant readings. That's awesome, okay, uh! So this system, i'm gon na, go ahead and give it the all clear uh, even though my evap superheat's just a tad high, i'm not going to go cranking on it too much.

I've already made some adjustments and i dropped it significantly. So i want to let the system stabilize out things don't always go as planned. I really wanted to re-pipe that, in a way that i could put the head pressure control valve back in in the end, when i was all done, it was questionable whether i would have had enough copper or not, but it was a saturday and i really didn't Want to go down the path of having to go open a supply house that unit really doesn't need a head pressure control valve. I just like putting things back the way the manufacturer set them up basically, but that rack essentially is meant.

You know they build these things kind of cookie cutter and they're typically meant to work anywhere within the united states for the most part, so they can send them to the desert where we're at where you can get extreme temperatures of 115 120 degrees, ish. Okay, it's questionable too, though, whether this rack can really handle the 120. I think it does okay at 100, but anything over that it starts to struggle, but - and they typically want them to be able to pull down to like negative 10. You know um.

They want to get the the main extremes of the continental united states for the most part. So with that being said, they usually put oversized receivers oversized condensers again that one's questionable with this master belt rack, because they do have some head pressure issues. But i digress. I'm going off on a tangent there, but um, and that's why they put the head pressure control valves in there.

Okay, you know in a perfect world. The head pressure control valve definitely does help you uh. It helps to maintain the pressure differential across the expansion valve to make sure that the refrigerant is flowing through the valve at the proper rate, at all points. So that way the valve can properly maintain the superheat.

With that being said, if i ever run into a problem, i can definitely throw a head pressure control valve back into the system, but i really don't think i'm going to have an issue with it out here. So i went ahead and re-piped it again. You know it's kind of confusing as to why people do the things that they do like, leaving that old receiver in there. That just seems silly like it was super easy four screws, 5 16 tech screws pulled that whole old receiver out.

So why did the previous guy need to leave that? In i mean honestly, i don't know you guys say it. I don't want to say it, but that's pretty ridiculous. So i went ahead and uh redid everything changed the receiver. You know redid the vibration absorber.

I will say, though i didn't catch it on video on the discharge line. Okay, you guys saw that i put a vibration absorber in there about three weeks later. I got another service call on that walk-in cooler. It was an emergency service call.

I rushed out there and the thing was completely out of refrigerant and i was like what the heck happened. You know my gut dropped. What actually happened was there's a clamp on the outside of the discharge line and that clamp was in the way that it was attached it actually cracked the discharge line. So the compressor has a slight vibration to it.

Nothing that i'm too concerned about, but it was just enough in the way that i put that clamp down that it broke the discharge line from just the normal vibration of the compressor, it's kind of a trip. So i ended up having to take that clamp out. Re-Secure, it put a better clamp on there that had a little more flex to it and recharge the system, and everything was good. You know what i should say: it wasn't completely flat, but it was damn near out of gas because i didn't even change the dryer because it was such a close time.

I just uh fixed the leak brazed it up real, quick evacuated it and recharged, because the dryer was still just in perfect shape. It was on the discharge line. Had it been on the suction line and it potentially pulled you know, moisture or something into there. Then i would have been a little bit more concerned and change the dryer, but anyways going off on a tangent again stuff does happen.

Okay, uh, i do get call backs. I mean it's normal. I wish i would have gotten on film, but i didn't so um but yeah. You know.

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