So it is compressor day. We've got a burnt-out 4/10, a compress that we're gon na be replacing this guy's. The culprit looks like it's a nasty one too, so I don't know what we're getting into. I went ahead and brought a new compressor contactor and then also brought a new TXV high acid, suction, dryer, high acid, liquid dryer and we're just gon na see what happens.

Don't know it's a new customer, so I really don't know what I'm getting into so see. What we can show you guys so the first thing we're going to do is just try to make our job easier. Verify that everything that we have is correct, verify that we have the right compressor we're going to go through it all. So what we're looking at is a ZP 61 KCET f5.

It's like we're correct, three-phase 208, that's correct! So compressors good. I already confirm the TX v. Tx v is good, so now we're just going to disassemble. Now we can make this easier, because if you look at this job, I got to put a suction dryer in here and I'm gon na put that suction dryer right here.

So with that being said, why not cut the line up there unbrace it? Then I got a lot more room to work in there, while I'm putting the new compressor in see, try to make it easy on yourself. You know same thing on the discharge line. If we can go ahead and cut that, maybe back where there's a coupling or something will do so, if we can we'll see, I'm gon na take this panel off it's that way we can get in here and work and I'll do the same thing in there With the TX visa will take panels off screws out and just kind of try to stay cool it's hot out here today I got a nice little sunshade up radio and basically my whole van. You know I brought a nice chest up here too, with some waters and some cold pizza for lunch.

You know it's the little things that make this job go easier. Yes, it took me a few more minutes to bring all this stuff up. You know I do have a helper here doing something else today too so he'll be up here working with me, but you know it does help to bring all this stuff up and bring a little extras. You know, yeah a radio, you know that's a nice luxury.

Yeah and easy up, that's a nice luxury, the same thing with the ice chest, but you know what it's actually gon na make me more productive. So you know yeah. I may take an extra few minutes and it seems like oh man, just get the job done. You know I see some of these people posted on Facebook, that a compressor should take you freaking four hours, hey guess what that's great! If it takes you four hours, it doesn't take me four hours, I'm not working like that.

I bid this to my customer as two guys eight hours. I really don't think it's gon na take that long, but hey I've got the room and it's not like I'm working slow, I'm just working smart and I'm doing things properly so take your time. Do it right and then you know we can find some problems. I also had to give myself a little wiggle room, because I don't know what made this compressor go.

Bad, obviously, we're gon na have to turn it on and find out. We may find other things wrong too. Now it doesn't that make it look a little bit easier, got access to the discharge line, nice and easy got access to my TXV and my liquid dryer, so work smarter, not harder guys. So I got the compressor refrigerant lines out of the way like I said, I just pulled them off of pieces.

You know I got a header right here for the suction header, for the discharge and then we're gon na slowly start putting the compressor back in there. Always have your safety devices, you should have a fire extinguisher up here and then you should always have a wet towel with you to just you know just to be safe. Just in case you never know. I don't know about you guys, but when you, if you can't have a fire extinguisher too, you know a water hose, is also acceptable.

What you usually have on the roof, but um. I don't know about you guys, but a lot of times I'll, find oil trapped and discharge loops and stuff. And then, when you light, your torches it'll shoot a little flame out of there. And you know if you're in a confined space or something that could be a problem, especially if you come upon a system that someone has put natural refrigerants in, you could have a problem with that.

There are some of those blends that have hydrocarbons in them too. That could be a problem. You know, because they're flammable so just always want to be careful that a small little tip is sand. Your fittings before you pull the rubber plugs up sand them as best as possible, and then that way you don't have any other chance of the crap getting in there.

There's always a little bit. You may have to sand on the end of it, but you know just make your job easier stand it before. So one of the things you want to pay attention to when you're, taking the compressor out and the whole time you're doing this job is you're trying to find the reason why this compressor failed. In the first place I mean there's always the possibility that a compressor just failed, but usually, if it's a grounded out compressor most of the time there's a cause haven't seen anything yet.

But what I did is again trying to ensure. I wanted to make sure that maybe the compressor didn't run out of oil, because when I was testing the crankcase heater on the old compressor it it's not it's no good. The current case, heater didn't, have any resistance across it so in there, but it wasn't grounded the crank case heater. So I just wanted to make sure that maybe our compressor didn't run out of oil.

So what I did was, I came over here and I poured out as much oil as I could get my partner that you're helping me isn't here right now. So it's a little difficult for me to tip that thing over, because it's a big boy, but I did my best and what I found is it has almost all the oil charge it's missing about 10 ounces. I think it calls for 56 ounces and I think I pulled 46 ounces out of it. I really don't doubt that there's more oil in that compressor, it's just really difficult for me to manipulate it and tip it over correctly, but just to be safe.

I am going to go ahead and disconnect the condenser coil and we're gon na blow the condenser coil out with nitrogen, make sure we don't get any oil blowing out of that and then we'll also do the same when we get the TX v out well blow. The evaporator out and make sure that we're not pushing any oil out of the evaporator also so again, I'm just trying to saw it save a headache later because you'd hate, for you know the whole oil charge to be stuck in the evaporator of the condenser and Then it come back and then ruin your new compressor. So what we did was we cut the lines everywhere we could and we flushed, that everything out nitrogen and we use the little rx 11 now I know they say not to use chemicals, but you know what this was a bad thing and we had to so. I was very careful not to use it in the places where it could get stuck.

I was confident I used it in the condenser, but I was confident I only used a little bit and I was confident that it came back out but liquid. I did not use it in the evaporator because I know I'm not gon na be able to get it all out of the evaporator, so we flushed the evaporator with just nitrogen. Nothing really came out of the evac, we're just kind of mocking everything up right now. Getting ready to weld we're gon na do a nitrogen purge while we're brazing and that's pretty much it so we're just kind of moving along nice and slow a little bit okay, so we've got the compressor in it held a really good vacuum.

Got it down to about 400 microns and it held so we're good. The next thing we're doing is I'm charging the unit right now. So what I did was because it was a grounded, our compressor turned on power and tested the blower and everything else and then disconnected the compressor. So we can make sure that there's no other electrical shorts in the unit and everything is running right now.

So the next step is to go ahead and put the compressor in to the picture and see how it run. The system is running, the compressor was running backwards, so I had to reverse the rotation and we also change the compressor contactor back in there, just because cheap insurance, as far as the suction dryer goes, it has about a 2 psi drop across it. I'm not a super fan of that, but I'm gon na let it run for a couple days and then we're gon na come back and go ahead and change that out again, because I'm worried that that is uh plugging up. I'm also getting a lot of black sludge coming out.

If I open up my discharge line into a towel, it's just the oils pushing out block, so we're gon na definitely come back out and change the dryers again just see. If we can clean this system, up still haven't found the exact cause as to what burnt this compressor out, but we're just gon na keep monitoring it alright. So I got all the panels put back on everything's, looking good, I'm getting an error code across the board right now and if you guys can't read it, but it says enthalpy sensor a seven failure. So I'll look into that but, like I said, the pressure drop right now is 2 PSI across that suction dryer, I'm going to come back, probably on Monday, it's a Friday right now we'll test it and we're definitely going to change it out again.

Now, because I want to try to clean out that stuff, like I said when I you know open up the high side a little bit on my gauge is usually black oil out, so we got a clean how to oil up other than that everything's. Looking good. I'm just putting it together and we're just rinsing some other coils off right now, so just a little recap: we went out to change a compressor. It was a compressor that we found while working on their walk-in freezer.

They had said that an AC problem we went over then we found that it was grounded out and blew the terminals out. So we went out there. We replaced the compressor, the contact or the electrical plug. We added a suction dryer liquid dryer purge the system cleaned it with nitrogen.

You know went through all the nine yards of everything, I'm let the system run for a little while the suction filter dryer had about a two psi pressure drop across did after everything was done, so we are gon na go back out in a couple days, replace That dryer also replace the liquid dryer again and then test the system for acid, I'm sure it's still gon na show up, so we might even have to go back out again, we'll have to see we're just gon na monitor it nothing jumped out at me. That said, this was the cause of the compressor going bad there's an air inside the board for an enthalpy sensor, but that wouldn't cause the compressor to go bad, so we'll just have to keep an eye on it. You know it could have been just something as simple as a loose electrical connection. It could have been a defective compressor.

More than likely it wasn't, there's there's a cause for it, but we went ahead and clean the condenser on it. Everything seemed to be doing good, so we'll just keep an eye on it and you know we'll see if we can get some video when we go back out to change the suction dryer. I don't know if it'll be myself or someone else so we'll see, but other than that. That's it.