So i'm up here working doing what i need to do and check this out. They drilled, they cut a hole with a torch into a structural beam. I can't believe that i don't think you're supposed to do that. This video is brought to you by sportlin quality integrity and tradition.

Well, today, we've got a walk-in cooler, that's not working properly. The evaporator section is uh running the fan. Motors are running and uh. The box is like 55 degrees, so up here on the roof at the condensing unit, nothing's running we're gon na go ahead and open this guy up and check out the electrical section, all right so uh condensing unit.

The first thing i want to do is uh. We're going to check voltage, obviously, but i'm going to do a couple. Visual checks of everything. Um compressor is not too hot.

We're going to spin the connect. Oh yeah got a locked up, fan motor for sure. Let's check what are the odds? They have two locked up fan motors um. Well, then, we can probably just jump right over to this high pressure control.

It's a manual reset right here, push it there. You go two back 10 inch fan motors. This one tried to turn they're both trying to turn so we got two bad finisher fan motors they're locked up, so let's go ahead and turn off the disconnect switch. Here's our evap everything here is gon na need to be clean because this thing's nasty yeah but we'll get those fan motors changed out and then see what we can figure out see if there's anything else going on, not that i need to do this, but just To be 100 sure, 208 volt to the left, motor and there's the right motor so definitely two bad motors.

It looks like okay, we change the right one in 12 and then change both of them in o5, with my notes so anyways we'll get it changed out. Try to make this as easy as possible take off as many panels as i can now watch out, because sometimes these fan motors will be uh, the blades will be broken or cracked, so got to watch for that little 5 16 ratchet wrench saves the day all Right here we go well, that's why you got to test fire things and make sure there's nothing hitting so i'll have to zip tie that up, but we know they work now much better. So we're already running a clear sight: glass we're gon na go ahead and put some service gauges on it, and uh watch nina, come down in temp and i'll start, putting the panels back together and stuff all right. This is our r22 system.

Pressure's look half fast decent. The box is about 50 degrees, so saturation temperatures yeah 37, 40, 36 right in there. That's not too unheard of it's about 97 degrees outside both of those motors are spinning the correct rotation. It's just the camera.

Shutter speed. It's about 96 degrees, yeah everything's, looking good, i'm gon na watch a sizeable temperature difference. We got a cool suction line. Coming back hot discharge line coming out.

Compressor is not overheating. The time clock time was off, so i set it for the correct time. We are going to be coming back, i'm going to have another technician: clean the condenser and clean the evaporator and i'll. Have him verify that the time clock has the right time on it when he comes back so it's cooling down in here? It's probably i don't know in the low 50s now, but it was damn near 60 degrees.

When i got here so it's coming down, i told them it's going to be a long time. I want to clean this evaporator, but i need this box temp to come down and to properly clean. It's going to take me another hour or two we're not going to do that right now. I'm confident that the box is going to work and we'll come back next week and i'll have someone else.

One of my guys come out here and clean this thing thoroughly and then clean the condenser. Also all right need to clarify and give some context here. The video first off started about i think, september of 2020 and when i sent my service technician back out to clean the evaporator and condenser and everything the evaporator was really rotted out. So we brought that up to the customer disintegrating with the age of all the equipment and everything and they opted to go ahead and replace the equipment.

So, let's get on to the next part, so we're doing a walk-in cooler replacement. Today, um i've got the crane just getting here right now. What we do is we come up here and we pump the unit down at the receiver and then we'll recover it on the ground. We do that just to save time, because we like to get the crane out of here as soon as possible stay out of the way.

So this guy's pumped down power's, turned off disconnected. I've got guys working on the evaporator right now and we try to be as efficient as possible, so the crane is going to bring a unit up and then we're going to take a unit down and we're going to get him out of here. Everybody's safe staying out from under the load, and that's it all right - the evaporator is out of the way we're going to redo electrical and all that stuff with the new evap, it's probably going to fit right in the about the same spot. More than likely it's not too bad of an attic, i can get it over here, so we're going to go right in this area right here we got our old bolts and everything we're just cutting out the old line set at the moment.

So i'm up here working doing what i need to do and check this out. They drilled, they cut a hole with the torch into a structural beam. I can't believe that i don't think you're supposed to do that this one's not going as smooth as i want it to so they have these penetrations and they're really nice, but down in here it was all sealed off. So the holes were perfect for the old lines and stuff, so i had to get in there with the ban or with the sawzall cut open, a hole and i'll clean it up a little bit more because i got to go down below so my line.

Set's going to be coming up, i open this section up right here, it'll 90 over down and then go in and then electrical is going to connect into this box come out flex and we're going to mount a disconnect switch right here. So we're running into problems with the drain and the coil too. Usually these things are cookie cutter, but this one's being a pain like back and forth back and forth. So i was able to come down here, cut it a little bit cleaner, so my line set's going to come up hit.

The top of the box right here run over we've got a penetration drilled right. There we've got our coil. I just tightened up the coil bolts too. I need to figure out little rubber things to protect us from getting our knees.

Broken we've got a new power run right here, we'll secure this box down in a little while they had mc running in there. So we're just about ready to run the line, set, we're working on the drain line right now, so so this new coil has uh. The drain is taller, so we weren't able to use the drain so we're having to uh, run a new drain line completely. All the way outside the box and then we're gon na penetrate the box over here, and we found a floor drain way down here so um.

It used to pipe in with all the other walk-ins, but it was gon na be a nightmare to have to lower the drain and stuff, because the new coil is about two and a half inches taller, so the drain was too low now. So it's not gon na be perfect, but i got the line. Set somewhat ran it's going into the walk-in box. We got extra soft up here.

I'm gon na work my magic with the benders um. What i ended up doing was capping off this end. Always save these caps, if you ever get them from line, sets capping off that in and i'm gon na cut the insulation way down here. Pull all the insulation off we're gon na.

Do the bend there there and there and it's not going to be perfect. Trust me and then we will uh get everything going. Well, it's not too bad bent it here, it's nice and good here here and then we'll go into the suction line. So i just use this yellow jacket, ratchet bender, with the reverse, bender attachment go back and forth between the reverse, bender and the knot, but it turns out pretty good for the 3 8.

I just use a normal hand, lever style bender, so all right. So what i usually do, because i've got the insulation pulled back up top, is i do everything with the last brace joint and then i'm going to slide the insulation on pull it back? Do the braze joint go go to town? So that's the last one. We got to do so, you can see i was purging with nitrogen, so the lines are completely clear: yeah we got a solid cupping action going on right there. So we're going to push this guy on the insulation is being held back by that guy and then we're done down here getting ready to braise these two guys right here, um yeah and then we're good, and we only have to pull a vacuum on the line Set because the unit comes pre-charged with 448a, so it'll be a quick vacuum everything's looking good so far, and do a pressure test, real quick to about 150 psi looks like i overshot it a little bit but it'll be okay.

You typically don't want to go over. The test pressure of the evaporator because we're testing but we're going to let it stabilize out and then test everything so there's a leak. I can. My pressure is dropping - and i come up here - and this is a factory brace joint right here.

They stub it out to here bastards, it's all good. They charge all this stupid money for this piece of junk equipment with these crappy ass valves and all this junk and then uh. They finally got rid of those sanhua valves, though, and they went to emerson valves but still junk man. This irritates me from the factory.

You know how crappy is that all right, i'm thinking i should send that to the factory and tell them that's what a braze joint looks like put some solder on there stop skimping dumb asses we're gon na. Do another pressure test make sure there's no other leaks, but we're good to go for now all right, uh we're looking good. Now it's been running longer than three minutes point four or nothing so before it was just pissing out, so i'm gon na go and do an evacuation now. I think we're gon na be good.

So my evacuation's at about 400 microns right now, we're gon na go and do the decay test and then uh. We should be good to go and uh according to the blue vac and pass my dk test, but i'm still going to let it sit a little bit longer. I realized someone told me that they have. I don't know if this is true, but there's an algorithm in there, because even though it takes a short amount of time, it still pays attention to the amount of rise and does some math to calculate that it's going to pass or not.

I don't know if that's true i'll, be kind of curious. I guess i should probably read the instructions um, but yeah we're going to go ahead and gauge up on this guy now just started the system up. The compressor sounds good. The phase rotation is correct.

We're building up head pressure, condenser fan motors, should turn on any second there we go fan cycling and we're going to let the unit operate, stabilize out, make sure we have a clear side class. Like i said, these units are pre-charged, so all i really have to do is open up these valves and the receiver valve. But whenever you do these startups, you always want to make sure there's no other valves like on the heat craft units. There's like a discharge service valve, so you can isolate the compressor, those things i find them like in the mid position.

So you always want to check on your commissioning to make sure i do like the fact that they have big stickers that say 448a and then they also label the factory charge. That is nice, so all right. Well so far so good! Oh, i think i got it all right, um, we're kind of just waiting for this thing to come down to temp uh, the box temp's pretty high, so we're probably going to come back on another day and check evaporator superheat after everything's stabilized out wow. I think i really do have it um up here looks good line, sets nice and safe.

I do need to tape this liquid line up because it's floating freely right now, so we'll definitely tape that up it's at 42, so we're doing good um everything looks fine over in there uh drain line looks good, uh we're foamed up all the holes. We just have that reflective, uh, metal tape. That looks like i don't know if you guys have ever seen that, but it looks like the cooler texture see it's like the texture of the coolers. I like that stuff because it fades with the cooler.

So we got a power switch right here, like i said, we'll, be back and we'll check on everything um, but yeah. Looking good so far, i do need to set this guy for defrost now um, because i don't think it was set up automatically. So i think, if you hold this button enter there, you go so 35 degrees. Is our box.

Temp differentials for i'm good with that compressor starts per hour, should be off. That's good. Defrost per day should be four, i'm good with that defrost time, 30 minutes. No, we don't need no 30 minute defrost, we'll do 20.

all right. There we go. Everything else is just alarms and i don't care about it. So we're good to go on that.

So this guy shuts down the liquid line, solenoid valve and powers, everything down and uh yeah we're good to go for now and - and we took so, the old drain used to stick out right there and connect to the other walk-in boxes and because they're all interconnected. We put a union on it so that way we could pull it off in case we ever needed to blow it out, because we didn't go into the other box and rip it all out, all the old stuff so but yeah we totally knew one so they're Good to go all right, we're back to do our follow-up today, box is down to temperature notice. The fan motors are spinning, slow. That's because it's satisfied.

There are two speed motors, so i've got my uh. My probes hooked up here we're going to go onto the roof and get all the pressures up there and everything will wirelessly connect up. So all right we're up on the roof. Everything looks good, install's, nice and clean.

You know as good as it can be got all my probes on the system we're profiled on measure quick, so i am using the measure quick, app and uh. I basically input all my targets that i want box. Temperature tonnage really doesn't matter, it's a one and a half, though 1.5 um. Actually it's a little bit less than that, but yeah that doesn't really matter too much.

We are fan cycling again, everything's there, so we're just waiting for the system to cycle on. So we can check evaporator, superheat and just monitor how the system is going. Now i do have a sub cooling measurement clamp on there, a liquid line. Clamp, i'm just curious.

It's not really going to do anything for me, but it's good to have the information. So we can benchmark it and say hey on startup. This system was running at this because we have a receiver. We charge to a clear sight, glass, but sub coin still is something we pay attention to.

We just don't necessarily charge by sub coin on systems with receivers so again we're just waiting for the box to uh. Let's see what my temperatures are inside, the space looks like it is 39 degrees, so it should be turning on any moment now, because it's set, i believe, 35 with a 4 degree differential. So it'll probably turn on at the tail end of 39 right at 40. Would be my guess? Okay, so we turned on and uh it's a fan cycle system.

There's no head pressure control valve, so the fan's not on until our head pressure gets high enough. Uh, it's probably going to be doing around 250 would be my guess. Um we'll see here yeah about 240., so we'll see what happens we'll, let it run for a minute and then we're gon na monitor the, and so it did turn on right at 40.. We're going to monitor the superheat and see where it's at we're.

Typically, on these systems, we're looking somewhere between 8 to 12 degrees, evaporator superheat, so right now we're looking pretty good right at 11 and it's not bouncing all over the place. So that's a good sign, uh everything's, looking good, my pressures are within range um. I'm not scared by anything numbers. Look.

Decent, evaporator td is a little bit high, but the expansion valve's moving around and it's just satisfied see it comes down really quick. So all right, we already satisfied, but while it was running it was running uh right around 11 degrees, evaporator superheat, so we're going to leave it there. Everything looks good and we're gon na call this one done. I thought that it cycled really quick.

That's why it went into defrost. So i wonder if you can take it out of manual defrost by holding that down yep good to know. Okay. That made me wonder, because i was wondering why it cycled so fast, but yeah we're good to go one of those things you know um.

You always got to look at everything, so it started simple as just condenser fan motors, and i looked past that and said hey. We needed to clean the equipment too, because it was pretty dirty and that led to the equipment replacement, because the evaporator was rotted out. Uh this particular customer is very proactive with replacing their aging equipment, so we went in with new equipment that the customer did supply themselves, so i am installing customer supplied equipment. I get a lot of questions about that and it's just if you want to work for the big restaurant chains.

You've got to do that, okay, so this particular customer. Does that and uh you know i i mean i can choose not to do it, but this is what keeps me going during the slow times and trust me. We are slow right now with all the craziness, so i'm super thankful to be able to have any work at all um. You know, because in the restaurant industry here in california, it's dead, absolutely dead.

Preventative maintenances are out the window, you know, and it's basically survival mode, so anyways um the replacement itself went pretty decent. That was a trip, though, seeing that that that steel beam, how someone just cut a hole in it to use it as a chase. I believe they were running that up onto the roof, to use it as like lighting, uh power for the roof or something i have no idea. But that blew my mind.

Can you imagine that, like luckily, this is only a one-story building, but i mean still. I would imagine that's structural, because the building isn't all steel, the building's uh. You know a stick frame. Basically so yeah, that's a trip.

Huh to see someone cut a hole in a beam like that. I don't know. I'm not a structural engineer but didn't seem right to me. Anyways um, you know so the the changeout went pretty straightforward.

We ran into a few little problems here and there, but you know we do quite a few of these. I mentioned in it that you know. I figured it was going to be a cookie cutter, but you can't let that stuff sneak up on you. So just because i work at a lot of these same restaurants, and i do these installs all the time stuff changes.

So you have to be ready for that. Okay, and you have to learn to appreciate the small things like being able to climb into the attic and have actual space to be able to move around and stuff. You know, that's that's something very cool uh. It's the little things that make your day go by easier.

Okay, so um went back out. Did the you know start up on the equipment? Everything was working fine. So there really wasn't too much to be worried about other than some installation problems and the drain line issue. That was another little hiccup that we had to deal with.

But you know we just deal with it um as far as the drains to to clarify on the drain. So what happens? Is the new evaporator coil was like two and a half inches taller and the old coil the drain line? Pretty much ran out of the coil, maybe down a half inch and then hit the wall and went in and it would there wasn't just an easy way to be able to without taking you guys into the other boxes and showing you where it connected and stuff. It just wasn't going to be capable or possible for us to lower that drain any lower. So luckily we found that floor drain on the outside of the box, so we just had to run the drain in an opposite direction.

Lowered it down got a great pitch on it and it all turned out pretty nice. So hey. I really really appreciate you guys making it to the end of this video. As i always say, please, if you haven't already check out my website, hvacrvideos.com got merch available on there or for the crazy people, merchandise.

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I've got lots of cool merch available if you're interested. If you're, not hey, no big deal, i could care less. Okay, it's just cool. I put it out there because people ask for it and uh.

It's really really cool, but if you're not interested, it's cool, no big deal. Okay, you don't have to purchase my merch okay merch. Are you triggered all right? Um, remember. Live streams monday evenings 5 p.m, pacific on youtube.

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