All right to start this off, I just wanted to say real, quick that I am gon na be working on a glycol chiller, it's like a mini chiller or a power pack unit, and essentially because I know I'm gon na get a million questions about this. Essentially, you have a beer walk-in and we have remote kegs in the bar, so the kegs are stored in the beer walkin and we have beer lines running underground or in the ceiling. Usually they go underground and the problem is is that those beer lines can get warm in between the 36 degree, beer, walk-in and the beer tap, where they're supposed to be pouring 40-ish degree beer coming out of the handles okay. So what we have is we have a little chiller or a glycol unit or a power pack unit.

You can call it either one and what it does is it circulates glycol through some carbonator pumps with a motor attached to it, and it circulates that really cold glycol. We usually run it at about 28 degrees, ish. Okay, so essentially it has a propylene glycol in there mixed with water. So we can get the right freeze point that glycol is pumped around the beer lines as they're running underground, so it maintains the beer temperature.

The glycol does not mix with the beer. It's at its own polypropylene line. I think I think it's polypropylene anyways. It says in its own line, that's wrapped around and then insulated really well, and that line just goes around and then there's a return line that comes back okay.

So that's the unit that I'm working on we'll get on with the video. Now this video is brought to you by sport'ln quality, integrity and tradition. All right today, all is on a glycol unit, but the problem is when I talked to the manager last night. He said one of them was down, but he shut him both down which sucks, because that means I got ta figure out which one was down now.

It's interesting, but he said one was temping. One wasn't so we're gon na turn. Him back on, looks like you, shut these off and we'll go through them and see what we can figure out. You may recognize these units because uh, maybe a year ago I did a video where I changed this suction service valve as it was leaking.

If I remember right, we put on a dryer still don't know which unit is the problem. This is the left and the right. The right seems to be coming down to temp a little bit faster, all of the pumps by putting my hands on them, they're, nice and warm. They feel like they're moving fluid, but that doesn't mean anything as of yet.

This really does kind of make it difficult. Cuz. Now I got ta wait to see which unit was the problem. We're gon na watch him for a bit and see what happens.

What I did very quickly. Don't want to do this for too long, but I went ahead and turned off all the pumps on each unit. Okay, I'm thinking that my problem might be with the left unit, because I've been here for 15 minutes and it has not dropped below 67 with the pumps running, but my right unit, it's dropped, maybe like a degree or something. If I remember right, but I shut off the pumps to both of them - and I want to see if we drop in 10 on either units that way, I don't want to clean condensers or anything yet, because I want to see the problem so we're gon na.

Let them run for a few more minutes with just the condensing unit running and we'll see if we get any drops in town. So, like I said you have to be careful, both units started flooding back to the compressor because their automatic expansion valves this one still hasn't dropped in temperature. This one started flooding back to this one dropped a little, but I'm still not completely convinced on which unit. There's the problem - and I really don't want to apply service gauges with 11 ounces of refrigerant until I absolutely need so we're gon na start handing out pump motors and going through that.

So my confidence that it is this left getting higher and higher, because we are not going on about 25 minutes and it has not dropped in temperature at all vital signs. Without putting my service gauges, we've got a cold suction. Coming back, we've got a hot discharge and we're just not dropping in temp and then also looking at each one of the pumps, the actual pump that's connected to the motor each one is sweating, which is a good sign. The next thing that I did was looked at the pump motors and looked at the the max current draw or the r-la, and I believe it was 2.3 amps, so I've isolated all the wires for each pump.

It's kind of a really tight situation up here, but and we're just going to ample now to see what we're getting 1.74 1.68 1.86 there's a little bit of a discrepancy there, but we've got cry and draw on all of them. This is interesting. This is a predicament and I'm getting closer and closer to having to put service gauges on this, but I'm doing everything I can to make sure on for no reason. The next thing I'm gon na do is check the actual glycol temperature and see if the temperature sensor is reading accurate, I'm not going to pull the temp sensor as of yet and ohm it out, I'm just going to check the glycol temperature.

Well, that's certainly interesting. So I wrapped my temperature sensor right around digital controller sensor. We got a little bit of a discrepancy there, I'm reading 37 Dixon's reading 69, which kind of adds to the story, because yesterday, when the manager called me, he said he just noticed that this was saying high temperatures, but he said his beer temps, weren't high. Yet so yeah, okay, well we're gon na investigate that a little bit further.

So I'm pretty confident in my failed temperature sensor. Diagnosis on this guy do not have a temp sensor. Don't think that my local suppliers have a temp sensor, but they do have an entire control package, so I'm gon na go in the head there I'll question them. I know they have the controller.

It's a dick selects. R60. It's a universal 230 volt controller. So I'll go ahead and pick that up and then, while I'm there I'll have them look for a temp sensor, because if I can get away with the temp sensor I'll do it, but if not we'll just change the whole control now.

Yes, I certainly could order a temp sensor, but it's a matter of the unit freezing up in this situation. If we let it run past about 27 degrees, we're gon na start to freeze up the beer lines and that creates a problem yeah. The customer could turn it on and off every night, but I mean I could put a control in here and just beat so we'll see we'll see what I can get my hands on. That also gives me the opportunity for this one to watch.

It completely come down to temp and satisfy now another thing that I'll tell you when I shut off the pumps, and I watch them start to flood back to the compressor. I noticed that this one right here flooded back a lot harder and a lot more. There was an ice pattern on the compressor that was huge. This one right here had a very small ice pattern and I tend to notice that this one suction line is not getting this cold.

Now I have not put service gates on here, and we certainly will do that because I'm kind of wondering if this on my AB low charge this one right here. I made a repair on this about a year ago and wait in the factory charge. So I'm pretty confident this one is charged correctly and I'm the only person this location, so I use some vital signs. That's gon na you know give me an idea and I might put service gauges on this, but we'll see when I get back so I'm gon na go pick up the parts so some further investigation.

I realize something - and I don't know how easy it is for you to see. That's my temperature sensor right down there right over. My finger is that okay and it comes into here too right there and I was doing some investigating and I realized that the sensing probe, the metal part of the probe is four inches long. So that's not a standard Ixil temperature sensor, so I am gon na.

Have to order the factory OEM part, so we're gon na have to do something temporarily. This dick soul, controller right here is wired to where the compressor is completely separate and they're running to a contactor. I do got to give her like some credit, because other manufacturers don't do this. All the pumps are running off of relays and the compressor is running off of a contactor, so that way, they're not overloading the controls or the switches.

Other manufacturers just put the full load on the switches and the switches burn out over time. Anyways I'm gon na throw in a temporary temperature controller to get them operating. So that way I can order the proper part. Now, ideally, you know what I'm gon na have to do is going to kind of hack it up, but I'll make it as safe as possible.

It's only gon na be for a day, because I'll have the part next day aired and I'll. Have it tomorrow out? Okay, so temporarily, what I did was, I grabbed the two wires from the compressor right here. These two ones over here went right into male connectors. That way, they're nice and say rounded it out - ran the sensing bulb down into here temporarily in the return and that's the return and then we're just going to set the control up here over out of the way we've got some extra cord, which is fine and Again, this is a major temporary repair and then we'll order, the part, so I'm going to power it up and then we'll we'll check everything out.

All right. We just shut off and it's at about 30 degrees we're gon na go. I turn it just a hair colder because we want to maintain usually about 28 degrees in these things, so pumps are still running controls working. So I'm gon na go ahead and put my probes on this guy and we are gon na check it real, quick and then we'll compare these numbers, because this unit pulls down really fast.

We'll compare these numbers to that guy! That's taken a little bit longer so that guys still have 34 it's pulling down, but I have a feeling: it's just a hair low on refrigerant people tend to put gauges on these things. Like you know, I have service texts and stuff and when I said earlier that I'm the only person to me my company's the only person, so we got to make sure that we're not low uncharged, I don't see any places where it could be leaking. There's really not much to these units all right, I'm using the field piece probes and you know really important when you're working on a system that has such a critical charge. This unit takes where's it at refrigerant eleven ounces of refrigerant.

You know normal service gauges. They aren't going to fly okay. These probes are great because I know I can put them on there and I don't lose too much of the refrigerant charge. It's awesome and it's even better than there's no Schrader, because I can just valve it off and then you have minimal loss.

You don't have that spray back that you get sometimes with Schrader's right now we're looking pretty good. We were running about 153 154, head 155 somewhere in there, and I pulled the filter off. The filter was dirty for the ambient that we're dealing with right now. This is not bad.

It's about 75 degrees. In this kitchen we have a mini-split dedicated just to this. These glycol units, it's very dirty, though okay, there's like mold and crap. It's nothing needs to be clean for sure, but so this gives us a baseline of where we're working with, and I know that this unit is working.

It's currently at 30 degrees and the high temperature was 32 before I turned back on, so I'm just logging, the temperature. So I can see the cutting and cut out, but really cool. You know wanted to point out the field face probes, because you know you have minimal refrigerant loss and they work great in situations that you have minimal refrigerant charge, very, very low loss on those things, but yeah we're looking good. Everything else is to be expected.

This unit, you treat it like it's a fixed, orifice metering device because it's an automatic expansion of. So it's really no change. It's. You know the difference between uh.

I don't even know why they have an automatic expansion valve. I mean, I guess no okay. I should take that back the reason why they have an automatic expansion valves, because, typically you can adjust them for your superheat and make changes to the system and dial it in versus just a capillary tube on a popular. You have to add refrigerant, I guess so, who knows but anyways we're looking good.

We have some numbers to compare this other unit to now, so the other unit is coming down, but it is literally taking a very long time. It's at 33 degrees right now. So I will also verify that the other sensor is working correctly on this unit before we order just the one - it's already valves off this valve it just to show you the amount of loss that you get from this barely anything I mean it's equivalent to taking A Schrader off when the depressor is working correctly looks like I need to change my gasket, but it's very minimal loss really like the fruits for that a bunch of hoses or anything for refrigerant to get stuck right. We are gauged up this guy's actually running very similar.

The head pressure is definitely higher. Let's go ahead and now pull this filter off and see what happens filters a little bit dirty condensers clean, not just on the surface. I can see right through it. Sky drop in Tampa another possibility is that they could be working fine and this unit right here.

I remember the manager called me yesterday to tell me one of his glycol drainage units was reading high temperatures. He said he saw like 55 degrees, which is not what is that right now. He said, though, he just noticed that when he was walking by, he wasn't having foamy beer problems or anything so without being. This unit may have been freezing up the glycol lines because when I got here in the morning he had both unis shut down and he didn't he again.

He told me he was not having temperature issues. So it's a very good possibility that this unit actually was freezing the beer lines which in theory could have still been cold. Basically, so when I turned it on that could be why it came down to temperature so fast, because the glycol lines could have been frozen, which these units do usually take a long time to come down. We're still, I mean we're, not bad, not bad at all.

I'm not really going to make too many changes. We're just gon na watch it for a little bit. So I'm not adding gas, but that's! This does not look that to me at all we're looking good 32 degrees. 32 degrees censors doing good, so we're gon na leave this one be we're gon na order that sensor and we'll return and they'll be fine temporarily all right.

We are back today we're gon na change the sensor hopefully, and that fixes the problem. I also brought in a universal 208 volt dick sill controller, just in case the sensor doesn't fix it, so we're gon na get this thing all taken apart. It's been running great with the temporary temperature controller the entire time, but I want to put it back to the factory one and the one next to it is running perfectly good. So let's get going on it all right.

So there's the new sensor and the old one, but if you guys can see that down there, it looks like this nut, there's a nut right there. It looks like if I loosen that I should be able to slide the sensor out, but I expect that glycol is gon na pour out of there too. So I put a towel down and I'll try to do a hot swap, really quick, because I don't want to drain the glycol out of this thing. If I don't have to, I know it's hard, but right back in there.

What I'm going to do is get a crescent wrench on here and I'm hoping that when I twist that I'll be able to slide the sensor out and push the new one in real, quick, that's the hope but I'll make it a giant mess man. I went to go, pull that damn sensor out and there's a compression ferrule on it and it's not quarter-inch. It's like five sixteenths, which I'm not going to have. I have three eighths and I have quarter-inch quarter-inch won't fit, and three eighths is too big man that pisses me off they're gon na get it's just gon na be ran over the top, like the other sensor was temporarily, but this is gon na be permanent I'll.

Just put some insulation tape down that irritates the heck out of me. These guys can't send the ferrule that you need. So basically, it works just like a compression fitting for like a waterline when you tighten it down, the ferrule gets stuck and then it pinches on it and creates the watertight seal on this guy. So from the looks of it I and it and it started to leak, and I tried to move the ferrule and it wouldn't move.

So it's really compressed on to that line, so I don't think I'm gon na get it off. You know what I was kind of able to shove a quarter-inch ferrule on there. Maybe I can get it in all right. I take back the bad stuff, I said about them.

It is a quarter-inch compression. Now the only bad side is is this is stainless steel and brass. I don't think we're gon na get any kind of a corrosive thing going on, because the other one was steel and steel, but it is what it is. I'm gon na try to put that.

Quarter-Inch ferrule on there and see if we can't get it in all right. It wasn't too bad as move some stuff on the way, but it did have a brass ferrule on it. The array, so I was able to pre - put that on and just shove it in it's in there it's going into there and I've got it hooked into that control. So we're gon na push this back up here and then power this guy up and see if it solves our problem, turn on a disconnect switch.

Hopefully nothing blows up. Yup 33 degrees BAM. Alright, so check this out, because this was a pain to order. I went ahead in order.

Two of them: they've got identical units. I know I'll leave it in this unit right here and it'll be ready. Just in case we ever have to change another one, all right that one wasn't too bad right. My thought when the manager called me the night before he said he had one unit down, but he said his beers were not temping high.

Okay, he just said that one unit was was reading really high and he didn't want to have beer start foaming, but he also didn't want to make an overtime call out of it, which was surprising because usually they want us to come out nine one one for These units, beer is one of their biggest profitable things there, but I ended up showing up the next morning and both units were off, so I was a little perplexed right. So I'm thinking that because it had a bad sensor, the sensor was reading 80 degrees. The unit would never shut off, so my thought was eventually it actually froze the beer lines which can happen and then you'll get foamy beer or it'll start causing problems, no beer or whatever. So my thought was: maybe they froze the beer lines and he just shut down both units.

Again, I never figured out why both of them were shut off but anyways. When I arrived, I had to wait for them to come down to temperature, which, on those glycol units, they tend to take a long time to come down, which is just kind of a waiting game. But eventually we found the bad sensor. I went ahead and did a temporary repair installed a temporary temperature controller just to get him by okay versus them, shutting it off, because if they would have been shutting it off every night, they would have called me every single day until I came back so just Through in that temporary temperature controller, it ran perfectly for about a week.

I ended up coming back about a week later and replace the sensor, and everything was good. Both units have been working. Great customer was happy, so not too bad. I really really appreciate you guys taking the time to watch these videos as usual.

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