This video is brought to you by sportlin quality integrity and tradition. Well, we got a walk-in freezer, not working and uh, it's pretty full of stuff um, but they just got a delivery right now. That's why it's like that. I walked in here uh they're, complaining that it's warm in here the thermostat says 31 degrees um, you get a little ice accumulation there, but there's no ice on the coils, so we're gon na start up on the roof and see what's going on up there.

So we walk onto the roof and i can already hear it: let's open this guy up, walk in freezers, this compressor to the right and uh we're off on a bypass. So it's like a pressure relief between suction and discharge inside, usually because of an overheat situation. So, let's come over here, see what's going on with the rack and the rack is plugged solid. So that's why we got a plugged up condenser on this bad boy, so we'll put gauges on it.

But this sound that we're hearing is a internal pressure relief and it's a safety protection that the compressor has built into it. When the pressure differential gets to be too big between high and low. I don't know the exact numbers, but it's basically bypassing to save itself. Um, so the only way to do this is to reset it let the pressures calm down and then start it over all right.

There is so much information, i'm going to stop the video here, real, quick, and i want to show you guys something, and this is going to help you greatly. Okay, when you're working on something, especially a copeland product. This is really easy. All you got to do is google search copeland, mobile, okay, copeland, mobile click on the link, a lot of things guys, all you got to do is ask the google now.

This is an app based program, okay, that you can download to your phone, but they also have a desktop version. So i'm looking at the desktop version right now, but you can download it on android and or the apps apple store all kinds of great information. So i'm going to click, the desktop version accept their terms. I already looked for this compressor, so here's my model number zf13k, zf13k4e tf5 you're, going to select your situation, i'm doing low temperature 233 phase right here, we're going to click this one and here's.

My compressor information there's so much valuable information on this copla mobile application. Okay, so we're going to scroll through this really quick mechanical. You can find out what size, how much oil electrical! If it's a single phase, compressor they'll have your capacitor information on here. You can find all that this basically tells you all the necessary electrical information, the winding resistance, okay performance information, uh information about where to get it.

You can cross the compressor over to something else. If you can't find this compressor, here's a replacement for it. If it's a a compressor that they've discontinued they'll have a superseded number right here: diagnostics, gnome likature drawings, but this is one of my favorite features - is service parts guys if you ever worked in refrigeration and you work on oem racks like this, sometimes uh, the the Manufacturer of the rack will order a specific compressor that you cannot get at the normal supply house. It's very difficult to get an actual roto-lock compressor anymore.

It's a steel welded fitting that has a roto-lock adapter already built onto the compressor. When you go to the normal supply house to get a replacement compressor oftentimes, they will only have a sweat compressor with weld on connections, but no rotolog connections. Okay, if you go right here under service parts, look at right here! You have your part numbers for the actual rotolock valves. Here's the discharge, rotor lock! This will either guy go in the fitting the half-inch fitting on the compressor or over it depending on the size, and then you also have the suction one.

But if you go to view others look right here here is the adapter. It's a roto-lock to sweat adapter for the discharge, so this is going to be a half inch to a one inch, okay and then also uh. That's a one inch roto lock and then on the suction side, you're going to have an inch and a quarter. Roto, lock, adapter to a 7 8 inch, sweat adapter.

Now these are going to be brass fittings. You have to solder those on, but they are great - and this is really great information on here. If you ever need a replacement compressor, it does not come with the dtc valve and i recommend personally, if you're going to change a compressor. You change the dtc valve the dtc valve is a discharge, temperature control and or the easiest way to understand.

It is a temperature responsive expansion valve it's an expansion valve that is not adjustable, that at a certain temperature it opens and closes to cool off the compressor. The simplest way to understand it. Okay, here's the part numbers because oftentimes some of the supply houses might be confused, don't know it. I go to my supply house with the part number half the time, i'll go to the supply house's website and put the part numbers in and make sure they have.

It before i even show up okay, so lots of great information. Another great resource on this kopla mobile application now again is something called the ae bulletins. Okay, ae bulletins is actually an app you can download for your phone, but i'm on the desktop version. We click on ae bulletins, okay, and what we're going to do is i want to search application and engineering bulletins, okay, and what i'm going to do? Actually, click right here is i'm going to do application engineering bulletins right here and then i'm going to go to compressors okay, but you can find all sorts of other information i'll go back here.

You can click on the types of compressors that you're going to use. If i go back to the engineering bulletins, you've got, i mean all kinds of things: tons of information, about controllers, motor protectors, motors condensers, so all sorts of information. So i'm going to hit refrigeration, compressors, okay and then what we're going to do is um. We are actually gon na find our compressor information.

Okay, so uh i've got a zf compressor, uh application guidelines for low temperature, one to two and a half horsepower. That's not actually the one that i want. Okay, so we're gon na go to. We can actually do a search right here, so if we go up here to uh zf um 13 k, let's input that and hit search - and here we go application guidelines for k-4 refrigeration, scroll compressors, two to nine horsepower when we click on that.

What we're going to find is a lot of great information on here about this compressor and the important protection devices. So if you want to find out about liquid injection boom, it explains how the liquid injection works. Okay, i get so many questions about that and it's really not that difficult, but it's confusing because you know someone will go up there like. What is this thing you know, so it explains it.

It explains how it works. It even gives you part numbers and stuff. Okay, so i'm gon na go back up here to the top and it also explains the compressors protection devices built into it, okay, so the ipr valve, if we go right here, the ipr valve have internal pressure relief valves with opens at a discharge to suction differential. So understand it's the difference between discharge and suction of 375 to 450 psi.

The high pressure hot gas is diverted to the motor protector and then eventually it will trip the motor protector. Now, in my situation, it wasn't tripped as of yet more than likely it had reset itself, and then it tried to start again or something who knows okay, but you also have information about the motor protector. The oil charge guys so much great information so definitely definitely check out the copeland mobile application. I was going to put my gauges on it, but we're not going to we'll just shut it down, because there's no sense right now: okay, walk-in freezer is system g as in george right here, but we're gon na have to shut down the whole rack.

So we can clean it, so we got it shut down now we're gon na disassemble, this guy, give it a thorough cleaning and then we'll troubleshoot after that, with everything turned off um. What the best thing to do is actually put these panels on so that way the water doesn't drip onto the compressors um. The other side has a catch pan and then uh. Let it sit.

We're gon na use the brightener cleaner because that's the heavy duty one rinse it out and then we got to clean the trough out and you'll see that when we're all done too, so we started by rinsing from the top down now we're going to rinse from Up here and just kind of knock the big chunks down and then we'll apply cleaner, trying to get some of this big stuff off of there, but look at how dirty that is, and it's crazy too, because that was cleaned like i don't know two three weeks Ago - and it just comes back this, this restaurant - we have a couple of them that this pollen crap attacks it, and i don't know if you guys saw right here. I have a swamp cooler that i had to install. I mean, if you guys, are og. You might remember, but i had to install this swamp cooler, because we've changed that compressor, probably three times all because it just keeps going off on high pressure bypass, basically or not high pressure, but bypass, because it's just locking itself out.

So we put this on to help cool the rack and it's primarily just blowing on the walk-in freezer side. It's just probably marginally sized look at the steam just coming off the compressor because of how much it's been overheating, we're gon na be lucky. If this compressor is not bad, because the customer told me that this started yesterday and they waited until today to call so this thing's been going off on bypass for a while, and if that happens enough, the the chingus that bypasses goes bad, which i've had happen On this exact compressor, which sucks so we'll have to see when you guys are cleaning these racks, i've shown this before this is specific to the kyrak racks. I want you to see something.

There's a giant trough over the compressors that catches, the water keeps them from falling on the compressors. You have to clean that trough out and if you don't, what happens is hold on all the mud just gets stuck in there and then, when the water evaporates, the mud sucks back up onto the condenser, so you've got to make sure you're cleaning those troughs out When you're doing these just get up in there with the hose wash that stuff out or you're just going to be back even still here, it just plugs up, but you've got to make sure you clean those troughs out, so we'll apply the cleaner and then just Let it sit and do its magic and we'll probably do another uh, we'll probably rinse this and then do another bit of it just to be safe, make sure we get all the big stuff out, but we're being very cautious not to get the motor. This cleaner is highly corrosive, so he's very cautious all right. We let it sit for about five six minutes, while i was cleaning out the coil gun.

So that's something i do. Is i always clean out my coil gun to make sure that there's no corrosive chemicals left in it and then now we're just going to town rinsing this guy out getting the big chunks out and it's just nice and slow? It's not a race because we want it to be perfectly clean when we're done literally got ta go row by row so make sure you get everything out of there and you know i said on the last clip you want it to be perfect. I mean it's. Never going to be absolutely perfect, you just do the best that you can get majority of the stuff out and then the key is going to be to get that trough clean when we're done.

That'll give us no joke we'll be out here in another three weeks, but at least we get some time um. You know in between these calls by having these panels, it keeps all this water that's coming down from unnecessarily dripping on the compressor, and while it will probably be okay, it's just a good idea to do that now. Another thing we need to do is yeah very thoroughly, we'll change the the setting to the shower setting and then wash all this stuff down. Just double check wash the sides, the tops just to get all the coil cleaner.

You see like coil cleaner and then you come over here and it's sitting there and all that stuff is going to become corrosive and cause a problem. So you always want to wash all that stuff off being super thorough, and i know this is uh. This seems time, time-consuming and silly, but you've got to take the time, even if you're going to be back in three weeks, you've got to take the time and do it right um that way it lasts as long as possible. So, while we're rinsing over there, you can actually see over here that there's no water coming out of that drain.

There's a drain right here, it's just plugged! You know now it actually drains down but yeah. That trough is a real big problem, while it saves the compressor from getting wetted and the same thing like when it rains outside. It really does a good job of keeping the compressor from getting too wet, but the stuff just builds up in there got the panels back in. So we're going to attempt to turn this guy back on the ice machines, nice and slow turning them on.

Okay, it's going to take a minute for the condenser fan motors to cycle because they are on uh fan cycle controls motors right here. Look at that compressor steaming like crazy man, nothing's hot. Let's hope that this thing's not permanently damaged all right. We are running um we're going to get and you notice the head pressure's dropping because we have a wet, condenser and uh.

You know it's evaporating that water, so the motors are probably gon na cycle on and off a few times, but uh we're gon na go. Get a thermometer down in the box kind of watch it stabilize out for a while, while we're waiting for it to come down to temperature. I came over here and the swamp cooler's dry. It doesn't have any water in it and the water float was like stuck in an off position.

It's weird! I don't like these. Cheap ass floats they're junk um, so we're gon na get this guy running and make sure that it actually works, because this swamp color has to work in this heat for sure all right. We got the swamp cooler running um, i'm gon na talk to them about putting new pads a float and a water pump, because it's time to rebuild that guy for this summer the pads are just super hard um, the system's running. It's coming down in temperature.

We're gon na tell them to keep an eye on it. I'm sure that's gon na help it a lot. It seems like the compressor is gon na be okay. So at this point, we're not gon na watch paint dry because it'd take probably two two and a half hours for that box to come down to temp.

It was a good 30 degrees in there. So it's going to take some time, especially with the product being that high, but this evaporative cooler we have it set on a temperature controller. So that way it turns on and off when it needs to, and it's literally there just helping cool off the walk-in freezer. So with that not working the dirty condenser and the heat over the weekend, we hit about 105.

Definitely this thing was just struggling, so i'm gon na have a talk with a customer too, because they're lucky, if that compressor, is not bad, because when this freezer goes down, they need to call us they waited. They just dealt with it through the weekend and i appreciate that. But you know it's like man, i'm gon na change, the compressor now you know so we're gon na put all the screws back in the panels and just keep monitoring it. It is running and it's getting cold and it's at 13 degrees, so we're going to tell them to keep an eye on it, that's it for now.

I realized that maybe i didn't explain everything enough in this video. Okay, what happens when you have experience and you've seen this happen? A lot is, i can walk up and i can hear that sound from the compressor and know exactly what's going on already now i do have history at this restaurant too, like i said, uh we've changed this compressor like three times. Okay, now um we solved the problem by really getting on them by putting that swamp cooler on there and uh. In my opinion, the equipment is just marginally sized and it always happens that it fails.

The compressor fails in a inopportune time, so you don't really have time to plan in a perfect world. Honestly, i would have talked the customer into letting me order a condensing unit and pulling it off the rack that way the condenser is adequately sized. The compressor is adequately sized and we get a receiver. That's big enough for the system.

Okay, but you know you just got to deal with what you got to deal with on some of these things. So when i walked up, i could clearly hear that the compressor was bypassing. I knew what was happening walked over found that the condenser was plugged and then eventually found that the swamp cooler that cools off the rack wasn't working either. I will note that that swamp cooler is highly inefficient.

It is a massive waste of energy, but it does serve a purpose because it blows cooler air to help keep this system from going off on high head pressure and or bypass. Another thing to understand, too, is the pressure control settings. It is important to make sure that you set your pressure controls appropriately, but in the summertime, when we hit 100 and 510, sometimes 115 hell one year we hit 120. um this equipment it it's not rated.

For that, okay and we will have nuisance pressure control trips and that just causes issues we end up having to go with auto reset on our pressure controls. If we put manual reset, i realize manual reset is the smartest way to go. I will literally be out there every time it hits 100 degrees resetting that pressure control. Okay, so this equipment essentially is designed to fail because it's not set up to operate in the higher ambient temperatures uh.

This particular rack manufacturer would size these racks and they would send them out all over the place and in my opinion, they just never size them appropriately for the extreme ambient conditions that we get. And then you add into the fact that the restaurants - don't do you know monthly preventative maintenances anymore. This particular restaurant does do a maintenance program, but it's like every three months. I think or something like that, but it's not every month um and even if it was every month, they typically don't want to pay you for 16 hours to go through and do everything properly you end up having to just kind of you know, go in there And just change filters check, belts, move on you know and then one month you come out and you you clean everything.

So it's never a full maintenance every single time. Anyways, that's a whole nother thing, so that leads to the failures of the compressors and issues with it: okay, but understanding how the compressors work is so important. Checking out that copeland information, i gave you guys those engineering bulletins, those are amazing. They have so much useful information, they explain everything so thoroughly and it really does help you to understand.

So i highly encourage you guys to research some of that information. The next thing i'm going to say is i highly encourage you guys to tear a compressor apart. If you ever have a failed compressor now, i'm not an expert okay, i could certainly not work for copeland um. I don't know enough about their compressors.

I know just a little bit. Okay to help me understand, but cutting the compressors open helps you to visualize. What's going on inside there, i've shown him a million times. I have a couple compressors, it's kind of funny.

I don't know about you guys. Do you guys have uh scroll assemblies that are door stops in your house, because my garage door, i have a scroll assembly like i just i have so many cut up compressors, because i have all the parts left over so um. I love cutting these things open when they failed. What you know trying to figure out what's happened inside of them.

Okay, so you've got a scroll plate assembly, they fit together. Um - and you know i mean it just kind of shows you how it operates. You've got the the seal assembly on the top. I mean there's so much great information.

You guys can find by cutting these things open and you guys can play with them now when you do cut open a compressor. What you're gon na find is that they're extremely oily okay. So what i do is uh. First off the first compressor you cut open, you're, probably gon na butcher.

It um. You know you kind of just remember how you cut it open. It's probably gon na be cut in weird places once you get used to them, you kind of know. The right places to cut cutting on the seams does help, but it takes a little bit longer be careful when you're cutting use proper ppe glasses, gloves all that good stuff.

But a good grinder, disc and you're going to realize too that you start to learn how to cut them open like if you take the grinder disc and you just go to town all the metal shavings from the grinder are going to go in the compressor. But if you very carefully kind of you know just very carefully cut it trying to limit the amount of grinder shavings going into the compressor, then you'll get a more true diagnosis of what's going on inside there, and you won't just see a bunch of metal shavings. Okay, so when you do cut them open, like i said it's going to be very oily, so what i will do is, i will take them apart and then i will soak them in an all-purpose degreaser. Refrigeration technologies has a all-purpose, cleaner.

It's the purple venom pack. You pour that into a bucket. You set all the parts in the bucket and you let it soak for two three days. You take it out and you immediately dry it before the air really starts to activate the resting process and it does a great job of degreasing.

These compressors i'll rinse them off dry them off and then just set them in a dry environment. And then i have these things to inspect and use as training aids to show people um. It's just fun. I just i i'm curious in the very beginning of my career.

I never did it, but now i love cutting them open and i usually like on the side of my house. I think i have a couple. Compressors smoke detectors that in the future i might do training with you know bad parts and stuff like that. So um.

I encourage you guys to cut that stuff open okay, so we got this restaurant operational. I did give them a quote. We haven't done the work yet, but they did approve us to go in and rebuild that swamp cooler put new pads. Now, whenever i do a swamp cooler rebuild, we do them annually.

They get new pump new pads new float, sometimes a new temperature controller, depending on the condition and they'll always get new belts too. I don't necessarily change the motor itself if there's nothing wrong with it, but we always change the pump, the float and the pads as a set okay, because the pumps they fail on a regular, the throwaway items. Okay, so we are going to rebuild this swamp cooler, get it operational 100 to where the float's not sticking anymore, and then, while we're out there doing that, we'll probably rinse the rack off again, because i guarantee it's going to be dirty understanding these restaurants. You know, i know that this location, it's like three weeks on the dot.

We have to go out and clean that rack again, it's kind of crazy so that swamp color helped us by by blowing cool air on there, but it still needs to be cleaned appropriately. So i really really appreciate you guys making it to the end of this video um. Please. If you haven't already check out my website hvacrvideos.com, you can get these shirts there, the hats there um, you know it's just a way that you guys can support the channel.

I've talked about the hats, probably in nauseam, but i designed these hats purposely to just say hvacr on them right here, because i didn't want them to be an advertisement for my brand per se, even though it is, but i mean i didn't want them to be A complete obvious advertisement for my brand. That way, you guys can wear these hats potentially at work and not violate uniform policies. Just says hvacr, you know, the hats are a flex fit style hat and i've talked about them before they have a black underbill purposely. So that way, our fingers don't get them nasty and what's interesting, you guys can't see this, but i can see light through this hat.

It is not a trucker hat, but it is a very unique style in that it's extremely breathable. Your head does not sweat near as much as you do in a standard hat okay, so this is a very breathable hat and when you get it, you guys will see like when you look at the texture. I don't even know if you guys can see this, but it is a and it's not really going to do it justice, but it is a very breathable texture, um again it's see-through, but it's not a trucker style. Okay.

They are flex fit uh. Large extra large small medium you can choose which size you have uh, i don't know that, but they are flex fit style. So if you're curious, what head sizes, the small medium will fit, just google search flex fit sizing and you can find it on the internet either a small medium or a large extra large there's other ways that you guys can support the channel. The easiest way is to simply watch the videos from start to beginning without skipping through anything.

Okay. By doing that, youtube shows you guys, advertisements and stuff, and youtube pays me for that. Okay, so it's very. I mean if, if you want to help to support creators, watch the video from start to finish, that's the best way without skipping through anything.

Okay, you can also, if you guys, are interested in purchasing any tools go to truetechtools.com. I have an offer code - big picture, one word at the moment today. It could change tomorrow, but at the moment today, using that offer code will get you an eight percent discount on your total purchase price of your order. You order five thousand dollars worth of crap.

You can save eight percent. Okay, i get a small commission when you do that. If you guys know what you're going to purchase, you can shoot me an email and i can actually generate an affiliate link and the affiliate link will help me a little bit more. I get a bigger commission and you can also still use the offer code and still save the eight percent as of today um.

So that's another way to help me uh. You can support the channel via patreon uh. You can donate via paypal, youtube channel membership. So there's several different ways guys.

I really really appreciate you. Uh live streams monday evening work permitting on youtube on my channel and then also live streams friday evening on the hvc overtime channel, with my buddies work permitting again and uh yeah, that's it we're gon na wrap this one up and we will catch you on the Next, one: okay.