This started out as a normal repair than they lost power, it made my job a bit more difficult but in the end all was well.
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00:00 SPONSOR CARD
00:10 CONTEXT
00:29 VIDEO START
02:00 WTF MOMENT
02:49 RECOVERY MACHINE TRICK
07:54 GO FIGURE
09:06 CONTEXT
09:27 A FEW MONTHS LATER
10:03 IMPORTANT SAFETY TIP
11:00 NICE BENDING TIP
11:27 BRAZING TIME
15:08 INSULATION TIP
15:25 FINAL INSTALL DAY
15:46 IMPORTANT CRANE TIP
18:39 NITRO TIP
19:32 EVACUATION TIME
22:23 INITIAL STARTUP
23:10 COMMISSIONING
27:43 CLOSING WORDS

This video is brought to you by sportlin quality, integrity and tradition. To give some context, this video starts out i'm coming after another service technician. I had another service technician go out, he changed a compressor, it was kind of a late evening. Service call and i had to follow up and come back out and change a dual pressure control and fix a refrigerant leak.

So i'm gon na go ahead and get on to it interesting one. I'm working on a walking, cooler, repair and the power goes out to the whole area. Um i've been waiting for about 45 minutes and it's been taking so long that i actually sent a service technician to go. Get me my portable generator, because all that i have left to do is vacuum the system down and charge it, which i know how much this system takes 14 pounds.

So i was just going to do it with the generator and the recovery machine and pump the refrigerant in, but again my guy hasn't showed up yet, but then all of a sudden i hear power restore or what i think is power restore because the equipment starts Buzzing, but it wasn't right - and i ran over to that ac right there and checked power and everything single phase, and they only reset two legs of power, so i ran downstairs, shut down all their three-phase breakers and uh. Let them know, but this entire complex of this restaurant right here is single-phasing right now you got ta watch this stuff. This is why i tell people whenever there's power outages to go turn off all the three-phase breakers and tell and just leave a couple breakers on single-phase ones and wait for everything lighting-wise to restore. You know as a customer before they check or before they completely turn everything on, especially if it's like a planned power outage or something this one's uh.

Luckily i was here, you know you know. Sometimes the three-phase equipment will recover from that, but if it's uh, if it's motors that are already on their way out and stuff like that, they can, they can burn up. You know so anyways my guy's still coming with the generator so we'll see if they have power properly restored by then or not check this out. One leg to ground has 80 volts.

Another has 122 and another leg has 40 volts. So it's not even single phasing. They haven't restored, there's a weird power problem going on this sucks man again. Luckily, i was here they're gon na have uh, i mean yeah.

Who knows this whole complex, though you know, other restaurants are going to have this problem too. Honda generator for the wind, no problem, starting up that vacuum pump either because the vacuum pump. It's the field piece vp85. It has that uh soft start feature on the dc motor, so super super awesome.

It's like a slow ramp up all right! Well we're gon na. Let this thing evacuate and then, if we have to we'll we'll push the gas in with the recovery machine too, all right, we still don't have proper power um, it's still all jacked up, so i pulled a vacuum. Um the decay came to 1061.. This thing's a piece of junk - i'm not worried about it, so we're going to leave it at that.
So what i've done is i recover or i vacuum down. I've still ball evolved off, and i have this closed right here. Okay, so um, i'm gon na purge. My gauges real quick, so what we're gon na do is we're gon na pump the refrigerant in backwards.

So the inlet is coming from the tank going into the machine and the outlet is going into the hoses and we're going to pump all the refrigerant into the receiver uh. We know that the system takes about 14 pounds of gas. That's going to have to be good for now until we can come down and pump it down, so we're going to go ahead and start this process. But first i have to purge to this hose right here, so we're going to go ahead and turn this guy.

On okay and then we're set to recover we're set to here go ahead and turn this guy on, and i should be able to purge right here. Okay, so now we're purged and the other hoses are still in a vacuum at this point. So the next thing we're going to do is go ahead and front seat the king valve on the receiver by front seating. It.

The refrigerant, is going to flow into that port right there and it's not going to come out going downstairs. So we're going to front seat it put as much into the condenser and receiver. Well we're going to put 14 pounds in and we've got the scale right here so we'll get that started all right. I'm going to finish front seating! This king valve right here nice and tight um these caps, these valves always leak on the packing.

So i'm going to go ahead and slap that on there just finger tight. So now we're ready to turn this guy on now, keep in mind, um running off of a generator isn't the best thing, because sometimes the inrush of these things can be a problem but again on this field. Piece pump because it has the soft start, the it has a very low in rush, and we shouldn't have to worry about anything with that. So we're open here.

Our scale is zeroed out we're good here, um yeah, that's pretty much it! I think. Let's see, we've got gas going all the way to here. So that's a good sign. Uh yeah we're ready to turn it on.

So we're gon na go ahead and uh open up the high side, all the way and then go ahead and uh making sure. I'm not messing anything up. Nope, i'm not open this guy up. It's already taken a little bit of refrigerant we're gon na go ahead and turn it on.

We also got ta make sure that we don't flood too much liquid into the machine. You got ta, listen because if it over, you can uh throttle it. I guess i should say if too much liquid starts running through so we're gon na. Let this process happen uh, i believe, there's nine or ten pounds in this tank and then we'll have to put a little bit more.

This is our 22., so all right, uh, this couldn't have been running for more than a minute and a half two minutes and we're already at 11 pounds three ounces um, so we're just about maxed on. What's in here, you can see my tank pressure's at 7. Psi right now, so we're going to go ahead and pull that down. Also being that we're using the mr45, it actually will have the auto shut off.
So, theoretically, you could just let it keep running, but we won't we'll go ahead and do that and then we'll add the extra refrigerant here in just a minute, everything's a little bit off, because we do have a little bit of gas trapped in the hoses and Stuff, but we think we're looking for about two pounds right now and again: it'd be easier if we could turn the system on, but because there's no power we can't so we're having to do with what we have so we're going to go ahead. We hooked up this guy um we're going to zero out the scale i already purged it up to here. So we're good to go on that. I'm going to open this guy and then i'm going to go ahead and open this guy and then we're going to go ahead and pump in until the scale reads: two pounds we'll probably go just a hair past that just to compensate for any gas.

Luckily, this machine also has a self purge, so you're able to get most of the trapped gas out of it. Um everything's ready turned back on we're good to go. We're gon na go ahead and turn this on see the soft ramp up. Also, you got ta throttle it because we are pumping liquid just to make it go faster.

So so you see how fast it's pumping we're pumping super fast, so we're gon na go for about two and a half pounds. That's an estimation oops, my bad. I throttled my thing there you go, but i actually throttled here like i would normally with refrigerant, but you can't do that because that's theoretically the discharge, so okay, so we're about two pounds: eight ounces, that's about all that we're gon na put in the system! Right now, with no power again we're doing all this because they have no power, so we're running everything off the generator. We're going to tell the customer how to restore power.

I have all their breakers turned off right now, so that nothing would burn up and they'll. Just have to turn them on later and we'll probably do a follow-up visit. The kicker is, is it's christmas eve eve it's december 23rd right now, and i really don't want to have to work tomorrow, so we're trying to do this, hopefully get power restored in an hour or two, i hope or something well also, that condenser looks a little Dirty so we'll blow it out with my air blower, it's funny how that works. Power just turned on when i finished with the repair, but that's cool.

So at least i can see everything operate now. Um at this point, we're ready to turn on power and open up the king valve. We should turn this on. Nothing should happen because the pressure control um yeah, so we're just gon na open this guy up start this up and make sure it comes down in temp we're gon na back seat.
The king valve should turn on here in just a second positive pressure. You can go ahead and pull the schrader core removal. I mean the vacuum gauge off there. We go it's running ready to finish doing this.

I still have the schrader removed from this guy right here. Side glass is clear: we're gon na give it a little while to run it's kind of high in temp. So, okay, now that i completed that we're going to fast forward to once we had to change that compressor. We actually brought to the customer's attention that the equipment was in horrible shape.

Okay, we had to get it operating by changing the compressor, but we inevitably talked them into replacing all the equipment too. Okay, so we're going to go into that equipment replacement right now. Today, we're getting started on a walk-in cooler replacement. We've got existing equipment, we're going to start running the line set today and penetrating down inside the box.

It's going to work out pretty cool, actually, so all right, the new coil, the refrigeration lines, are in different spots. So that's how we're able to leave the existing one hooked up, we drilled a new hole so that way the p-trap can come down, go over and then go into the coil, which will be this way so we're gon na go. Do that hole over there now and then uh. We got a decent little area, it's a little cramped as far as the height goes, but we can get up in here.

It's nice all right. We have uh this one now drilled, two! So that's perfect and we're gon na just start getting some copper up here and all the other good stuff whenever you drill these holes like right now, someone just went in the walk-in box and it used this as a pressure relief. So all the crap comes flying up, so you always want to be careful working in the attics after you've drilled, a new penetration it'll blow that polyurethane foam up into your eyeballs. All right got a crap ton of insulation and a crap ton of pipe and we're gon na lay it out uh get an idea where everything's going to be now.

This is because this is a dual evaporator um. We did the calculations and we're coming down with 7 8 for proper velocity, and you know oil return back to the compressor but uh. Once we get to the second coil we're going to reduce down to 5 8., it's actually going to come out of a t and go 5 8 to each coil. But we're going to run 5 8 from that coil over to here, because there's no sense in running 7.

8.. All right! So we're working with hard drawn acr today and uh we just annealed. It got a nice clean bend out of it. So it's nice! When you have room up here to work nice clean bend, swaged it right there and we're just going up so we're just sliding the insulation on and working our way back, we'll do the liquid line next, just like i've been doing for everything else, we're annealing the End and then i just swaged it with the swage bit on the drill, nice and clean good, raise it on all right.
We're in we've been flown with nitrogen too. So this is just my drop down into the walking coil. We reduce down to 5 8 and then this is the main run to the condensing unit. That's the run to the other coil, so we're going 5 8 to both coils.

All right. We are just about done. We got to go up onto the roof now and we're going to use soft, copper and put it down here and then make some braze joints right in here, but we still got to support the lines but as far as everything goes, the line sets ran. It's going right there, it drops down and then over at the other end right over there.

It drops down too so we have one solid line set, so we just got to support and then the day of the job we got to come up here, cut the old line set out and foam the holes and stuff, but so far so good, and we Were able to do it with all hard drawn and just anneal it? So no um, you know normal brazed in elbows or anything, so that was cool. So this is my existing equipment walk-in freezer. This is the one that we're changing, walk-in cooler. So this is the top side of what we were looking at earlier.

You can see my lines right there, so what we're gon na do is just cut this out with the sawzall right here this little section and then we'll break this conduit, free and we'll use that right now and we'll just kind of bend the lines over and Leave them right there we're not going to do this job for another week or so, but i wanted to be 100 done with the line set, so we're gon na knock this out right now. This is all that we're gon na do today. We've just got the line set up here now. It looks like crap right now, but when we do the job we're gon na eliminate this line set and we'll be able to straighten everything out and make it.

You know neat a little bit more. I guess i should say um, so we still have to braise in the attic. So we don't have those pinched off yet or capped, so we'll pinch them off and tape them when we're done. But we got to go down there, cut braise and then uh then we'll be done for today.

All right final, two connections right here, then we'll tape it up. I got my guy downstairs. Turning on the nitrogen, we have the nitrogen flowing from all the way down way over there in the box all the way up here to the roof. So i had pulled the insulation down with the tubing cutter and pulled the insulation up with the tubing cutter.

So then i braised it on and i let the tubing cutters go and they perfectly met just gave them a tape, taped the liquid line to it, and that's it again. We're just uh support a few things and we're off to the races. All right. My crane is getting set up uh.

What i did was pump the unit down all the gas into the receiver shove my service gauges into the unit, we'll have a tech recover it on the ground. We got the unit, disconnected the electrical disconnected right. There line set cut, condensed unit unbolted, so the crane's going to lift up the new unit we'll take down the old unit. You got to watch out for the vaults right there, so you got to make sure you set the crane up accordingly, where it's not going to collapse a vault, so uh.
You can see the reason why we're changing that coil! It's just completely disintegrated and it's vibrating to all hell. It's been a bunch of leak repairs up in here it's been a nightmare, so it is time for sure, so it wasn't gon na work. It was gon na be too weird with the original wood. So i very carefully cut the wood in place without going through the roof, just kind of notched it and then broke it off.

We're gon na move some things around now. This isn't gon na be perfect because eventually we'll change that walk in freezer, but the conduits were secured to those four by fours. I'm not going to be able to make that look perfect, because i'm not going to replace all that conduit so that conduit is probably going to look like crap temporarily until we change that condensing unit um, but yeah we're moving along to make life easy. The condensing unit's going to set back a couple inches from where it used to sit and i'm going to go ahead and do these bends or try to do some of these bins.

Now. So i'm going to pitch it down towards the unit and then do a bend into the unit before i set the unit there. So that way, it's easier to work and i don't have to fight the unit you know and all the equipment in it we're going to take these two valves and get an approximate measure from center to center. So we're going to go with about a half inches and then uh.

I've already got the suction line, bent where i need it, so we'll make this bend three and a half inches further than the suction line. So hopefully it'll line right up. That's the plan at least, and then i got ta figure out a way to cross it over and make it look good. It turned out nice nice good, pitch kind of acts as a trap too or reverse trap, or whatever um cool.

I, like it, we're gon na braise these guys in the last thing i need to do before i finalize this and braise. This is. I need to hinge that exhaust fan to make sure that it's not gon na hit when it hinges um. I was just thinking about that right now.

I don't want the grease cleaners to come, drop it on the condensing unit, kind of a thing, all right, nope we're safe, we're good. It has chains holding it up and that's not grease by the way. That's just water from the rain um. You know it's not ideal having this this close to this exhaust fan, but i'm not going to really reinvent the wheel here uh.

So this is what it is and it'll be fine. This isn't a grease hood by the way they don't even cook anything under this hood anymore, because they've redesigned their kitchen, so it really does a whole lot of nothing. All right got these two done. Braids turned out.
Nice valves are nice and protected um all right. We are going to uh, i'm gon na, have someone start on the electrical on the roof and i'm gon na go downstairs, and hopefully the guys have the coils hung and i can start uh brazing, the suction line and liquid line in down there. So i'm gon na go ahead and let this go because it's being held back with the tubing cutter it'll slide right over and then we'll keep the nitrogen on, but i'll just turn it off at the valve. Right now and then, when i'm ready to braise down there i'll have my guy up here turn it on okay, we're doing a nitrogen pressure test right now, um the uh get up to about 150 psi and see if it holds um, yeah everything's doing good.

But look at that that discharge temperature controller clamp thing is on the ground, we'll have to make sure we get that put back on. Hopefully the clamps not missing all right, i'm confident in my welds. You can see i'm in pressure test mode or tightness test mode. On the field piece manifold, so we've been running for approximately three minutes: i've lost 0.1 psi.

The pressures aren't changing. I actually didn't lose 0.1. I gained 0.1 um, i'm confident we don't have any leaks, so we're going to go ahead and get the vacuum rig, set up and pull the evacuation. Now.

This is a pre-charged unit, so the refrigerant is sitting behind this valve. I can actually the whole time we've been working. I can see the refrigerant moving around on the side glass, so all we're doing is evacuating the line set and the evaporator coils we're going to go ahead and start with the one hose evacuation. If i find that it's not keeping up then i'll put on the second hose, but i don't think i'm going to need to because it's just the line set in the coil, so we're pulling through the suction side.

And we have the core or schrader core removal tool on this guy and the micron gauge on the little process stub on that, so we're getting a true vacuum. Reading all the way through to the liquid line, i'm going to start putting panels on and wrapping things up just to try to make use of my time while i'm just waiting up here, i run the gas ballast open until i get below 1500 microns, or so You can see we're at about 9 30. So, oh, you probably can't see that but yeah we're at about 900 microns right now, true vacuum, so we're going to go ahead and close the gas ballast and uh again we're going to get it down. To probably i'd say about 400 microns is what i'm aiming for um and we'll do a decay test and go from there, but it's kicking ass, just on one hose when you're not pulling through oil and stuff like that it pulls down super quick.

We also got to get started on removing the old line set from the attic we're gon na yank. It all out, go cut it up and then i'll put the lid on and yeah. That's it like. I said this electrical right here is going to have to look crappy when we change that condensed unit, which i'm sure will come soon, we'll clean it all up and make it look pretty, but i can't really do a whole lot about it right now.
I'm going to start the decay test when you work with these things, you want to slowly close them. Let it run for a minute, then close them again, because there could be a little air pocket in there we're at about. I don't know if you guys can see that 242 microns right now, so we're gon na go ahead and start the decay test. I'm not gon na.

I can do the timer on on the blue vac app. If i wanted to, but essentially i just don't wan na see it rise too fast. So uh we got ta let the vacuum catch up with itself. First, because you see how it's still dropping right.

Now, even though i've got it valved off because it's still making its way through the system so we're gon na, let it sit there for a few minutes make sure within five minutes it doesn't come above a thousand microns and i'll be pretty comfortable with that. Ideally, you want to see it like if you're, if you're pulling down to 400 - you probably i don't know - maybe don't want to see it come above 800 microns or something like that. So all right, it's been about five minutes, we're at 185 microns and we're not even we're still dropping so i'm confident we're good on our evacuation. Um we're gon na go ahead and open the system up.

Let the refrigerant through and turn on the condensing unit. I'm gon na go ahead and start the system up with my normal gauges, so i'm actually before i opened up anything we're still in a vacuum. I'm just vacuuming down my hoses all the way up to the vacuum core removal tool all the way in my manifold and everything. So that way we don't contaminate the system.

You know with air in my hoses or anything like that, and you know i try to do that when i can, because i have the tools up here, i might as well just run the quarter inch hose pull it on the manifold set and then we'll open It up to the system pressures and all that we're started up and only one fan motor is running, so i would assume that one of those controls right there is a fan cycle control, i'm trying to think if i've ever seen them stage where they do, one Which is the best way to do it, but really they should have two fan cycle controls, one for each motor, but we'll see we're at about 223 psi right now, 448, a so, let's give it a minute and see if it kicks the other fan on. I i turned it made sure it wasn't locked up or anything so and there we go it kicked in. So i think we're doing good, so they are cycling. Only one fan which again in a perfect world, it would be better if they had two cycle switches.

So they could cycle them both at different pressures, but they don't do flooded. Uh head pressure, control valves on these things, so this is their only means of head pressure. Control is just fan, cycling back uh the next morning. I wanted to come to a follow-up and check evaporator superheat.
You see my control is satisfied. Therefore, my evaporator fan motors are spinning slow on both coils, that's normal for these new high efficiency systems and as it turns on you, can see the fan motors speed up. So you're going to start to see that more and more with the new awef walk-in requirements. So all right everything is looking good, we're monitoring everything from on the roof.

I'm gon na go ahead and pull up the system vitals on a screen record right now and show you guys what measure quick was showing me. One thing i will say is: we've got one condenser fan motor. That is cycling on head pressure, so it's got a fan, cycling switch on it, so that is going to affect our sub cooling readings and the overall system vitals. So keep that in mind when i pull up this screen share right now, so to see the multiple super heats.

What we do is hit the little snowflake icon in the front go down here to multiple superheat tests and then we can assign the different probes. So i know it's the top two probes or temperature clamps, so you can see on one evaporator, i'm running 11 degrees, one evaporator, i'm running 12 degrees. So i like that that looks good to me again we're aiming for about 10 degrees, but i'm not too overly concerned with that. All right, real, quick before my system satisfies we're.

Looking good right there, the sub coin's a little bit high, but the condenser fan motor. Just turned on the second stage, so it's still kind of stabilized now, but my box is literally about to satisfy right now at 34.9 degrees. Let's go ahead and see what my evaporator superheats are we're looking at 11 and 12.. So that's still doing really good.

Don't see any problems here, condenser td is dropping as the condenser fan motor uh since it turned on so there we go. That's a more realistic sub cooling for sure. Okay, so you can see the system's kind of operating pretty good. I mean you know, because that condenser fan motor cycling like it is it's kind of skewing a few of the numbers, but it's okay.

Overall, our system is doing good. It's maintaining proper temperatures. You can see that these new condensing units and evaporators that meet the new awef requirements um they run a lot more efficient as far as energy efficiency and that's the whole goal of the awef requirements. Okay, it's really important to uh to know what it is that they're doing here and why they're doing it, because we're really trying to save energy.

If we can reduce the energy consumption, then we can save the customer money and or relieve the stress on our power grid too. Now, there's some problems because of it. You know i'm not taking a political stance either way, but i mean this is what we have to deal with some interesting things that i take away from these new awef compliant condensing units and evaporators. One thing is measurable: sub, cooling, okay, that's a trip because normally on a refrigeration system, you would not have very much measurable sub cooling when you have a receiver, but this one, as you guys see, i mean i have pretty darn good sub cooling.
Currently, right now, with one condenser fan motor off we're running a little high 19 degrees, sub cooling, but uh when that condenser fan motor cycles, i'll typically see anywhere from eight to ten degrees, sub cooling on the liquid line going downstairs to the evaporators okay, so uh, That's pretty cool, so what they're doing on this system is they're simply taking the the liquid refrigerant coming out of the condenser? Okay, it goes into the receiver. Then it comes out of the receiver goes back into the condenser. Does another pass through the condenser then comes out goes through the liquid line, filter dryer through the sight glass, then down. So you get that extra added sub cooling circuit to try to maintain efficiency um.

If we can uh lower the condensing temp but still maintain proper sub point and still keep a clear sight glass, then obviously we can operate on a more efficient system. So overall it's a decent install. Like i mentioned you know, i'm not really going to do much about those refrigeration lines right now for the walk-in freezer, because we will be changing that equipment very soon, but the walk-in cooler looks nice and good um. I would have loved to have set it back from that exhaust fan, but again it's not a grease or even a heat bearing exhaust fan.

It's not even being used anymore. My customer buys their own equipment. It's not my favorite brand of equipment. It's rdi i mean, but it's functional, it gets the job done it's just not pretty.

You know they don't do a very good job tying up the wires, and you know just little things like that and i don't really care for those little peanut pressure controls that they use the little encapsulated ones but hey again the equipment's functional and it operates. And it's what the customer wants: okay, so essentially we're coming out and we're installing the equipment for them, but i had to you know: let them know like hey. We really need to consider replacing this line set for a couple reasons: okay number one: the line set was really deteriorated when you pulled back the insulation, it was already turning green and it was really pitted out. So inevitably, it was gon na leak, eventually, okay, but on top of that, because we changed over to r448a, the refrigerant lines were way too big, okay and we needed to reduce them down to maintain proper system efficiency.

Okay for oil return, refrigerant velocity, so the suction line of the exhaust, the original equipment was uh inch and an eighth, and then it ran to the first coil and then it dropped down to seven eighths to each coil. Okay and the liquid line was a half inch, the entire way, all the way to both coils with r448a. I did the calculations using the sporlan's virtual engineer and we calculated uh because - and let me let me preface this by saying two: we also downsized the equipment, because what was there was uh oversized. I think they had a three and a half ton or a three ton, uh condensing unit with two 14 000 btu evaporators.
I think, if i remember right and what we actually when we did the load calculations being very generous with our load calculation. We actually went in with a two and a half horsepower condensing unit and two 9000 btu evaporator coils, okay, and that was much more closer to what the actual uh heat, infiltration and load calculation told us. We should have okay with that being said, because the equipment went down in size and also because of the r448a refrigerant we had to adjust the line sizes. Okay, so um, that's what the you know.

We really needed to adjust that, and if we didn't, we potentially were going to have too big of a liquid line, which would make the system take more refrigerant than it potentially needs, which could also lead to our receiver, not being big enough to hold and or Pump down the entire charge into the condensing unit, so that's something you got to think about and then the suction line, being too big can mess with your uh refrigerant velocity and your oil return coming back. Okay, um! Certainly, you know, as i'm editing the video and even while i was doing the job i realized you know i probably should have put a p-trap on the riser going up to the equipment, but that was marginal, whether or not i needed it. Okay, i had p-traps on both evaporators and we had a reverse trap on the you know coming up on top of the walk-in box. You know so yeah, it's kind of you know.

Should i have put a p-trap going up to the equipment. I guess maybe um it kind of would have led to uh having to redo a few things, but it could have been done. You know, certainly it's really easy when i'm done with these jobs, to watch the video and watch the footage and be like. Oh yeah, you know i could have done that and that probably would have been better but hey.

It's there. It's functional. I really don't see us having any problems that that rise from the walk-in box, where it goes up onto the roof, is probably five feet. I really can't see that being a problem, but in theory the the potential of an oil issue is what we're trying to prevent by putting those uh p-traps.

Okay, so um, you know we could theoretically have oil get trapped on top of the walk-in, and maybe we wouldn't have the velocity to push that oil back up, but again because i size those lines accordingly, i really don't see us having those problems. Okay, um, if you want to know where to get that information from uh, you know you can open up any refrigeration. Installation book they'll often have line sizing charts in there. You can open up the old copeland manuals.
I've got them over here. The blue paperback manuals. Just look up copeland refrigeration manuals. You can open up your uh, your refrigeration, textbooks that you had in trade.

School uh also go to um, sporland's website sporland.com and look for their virtual engineer and on the virtual engineer you can actually do line sizing on there too. So essentially, once you do your load calculation once you size the evaporators, then you size, your condensing unit to you know, have enough to be able to uh run the evaporators. I was tripping over my words right there once you come up with your condensing unit and your evaporators, then you're gon na go ahead and come up with your line sizes for the refrigeration lines figure out where you need p traps and all that good stuff. Okay, so there's lots of great information.

All you guys got to do is research. It so check out. Sporlen's website. Look for spoiler virtual engineer.

You can even just google sporland virtual engineer and i'm sure it'll come up too okay um but yeah. So hopefully that makes sense. I know the video kind of started out with that. You know service call right after i came and changed the compressor.

So the time span between those two uh sections of the video from when you saw me, using the generator to charge the system to using uh to doing the installation, i would say, was about three months. I kind of knew it was coming. So i was just waiting on that footage. As far as the generator goes.

You know, i've actually never ran into that problem before. That was something interesting and i'm glad i had that small portable generator or we would have just been at the mercy of the power company um. I had actually just bought that little portable generator from my own house and uh. You know probably a couple weeks prior to that, because we've been having a lot of wind events out here with the santa ana winds that we get in southern california and they've been shutting our power off because of it.

So i went and bought that generator, and i'm thankful that i did because you know it. It worked out really well to be able to do this, and you know charging the system with the recovery machine. That was interesting too. I'd never done it before i mean it's, nothing really crazy! If you think about it, you're pulling the refrigerant out of a system.

Why can't you push the refrigerant into the system? I like pushing it into the receiver, though, like i did, especially with that king valve front seated. So then you know it's just going into that receiver. That makes it very nice and something that i mentioned in the video that i could have done that i didn't do was since i was pumping that refrigerant into the receiver and the king valve was front seated. I could have used a heat producing device and heated up the receiver and checked the liquid level from the get go.
I actually did it after. I started the system up after the power was restored and checked it, but i could have done that because essentially we had a pump down system. You know once i got that full charge in there so anyways. I really really appreciate you guys making it to the end um.

You know the end of these videos. You know they may get a little bit longer and longer, but i'm really trying to answer all the questions that people ask me and i can kind of predict the questions that people are going to ask me. So if you haven't already check out the hvacr tools, youtube channel will be a link in the show notes of this video remember i do live streams monday evening at 5 p.m. Pacific on my youtube, channel, uh work permitting, of course, and then i also go live on the hvac overtime youtube channel on friday evenings with my buddies, just to kind of hang out and relax and talk about the week.

So hopefully, we'll see you guys on one of those uh live streams or on another video. Okay, really appreciate you and we will catch you on the next one.

45 thoughts on “They lost power in the middle of the repair”
  1. Avataaar/Circle Created with python_avatars DESU! says:

    One time at my office we lost one leg of 3-phase power and one of the partners realized immediately that the big 3-phase roof units needed to be killed. Saved the units. It got warm for a bit until they brought back the 3rd phase and the units were turned back on.

    They were still replaced a few years later tho lel. one of them was over 30 years old and the control board would keep locking up, and the other one wasn't as old but it just up and died. I'm pretty sure the main office area was the old one because when those compressors kicked in you could hear them vibrate the entire roof.

  2. Avataaar/Circle Created with python_avatars John White says:

    I fail to see why you have to braze the fitting now days? Are you in Ottawa ?

  3. Avataaar/Circle Created with python_avatars Brennan Wheeler says:

    Imagine replacing your compressor just to have the tech be like yeah replace the evaporator and condenser/linesetโ€ฆ

  4. Avataaar/Circle Created with python_avatars Donnie Robertson says:

    Great job and video like always Service area Nepean??

  5. Avataaar/Circle Created with python_avatars Gordon Davidson says:

    How do you calculate the need for additional refrigerant to accommodate the line set from the condensing unit to the evap?

  6. Avataaar/Circle Created with python_avatars Elwood Noble says:

    You are an incredible perfectionist! Great work!

  7. Avataaar/Circle Created with python_avatars tube-dude says:

    How often do you go for training on new A/C unit electronic design & Test Equipment?

  8. Avataaar/Circle Created with python_avatars tube-dude says:

    Never understood why Black foam is used, when White foam will soak-up less heat from the sun!

  9. Avataaar/Circle Created with python_avatars Leo's Bag of Tricks says:

    It's great to follow someone who really knows what they are doing.

  10. Avataaar/Circle Created with python_avatars TRANSMITTER GUY says:

    What do you do with those defrost timers, set to go off for an hour, when the power goes out?

  11. Avataaar/Circle Created with python_avatars Texas A.C says:

    Awesome job ๐Ÿ‘ bro as a tech we to do the craziest things to get the job done

  12. Avataaar/Circle Created with python_avatars John Rece says:

    I've ran into a lot of faulty headmasters on those heatcraft units

  13. Avataaar/Circle Created with python_avatars EpieVlog says:

    yeah i love installation.nice layout odf pipe goodjob sir chris

  14. Avataaar/Circle Created with python_avatars Ronald Zeigler says:

    I have see this happen power out . In as. They always single phase here

  15. Avataaar/Circle Created with python_avatars Artur Ovod says:

    You have an interesting job! And when I was a little boy, I was 11 years old, I helped in the Boiler Room in the pool, my mother worked as a swimming coach (helped local masters) To get a kitten out of the ventilation was in 1990! In the Pool in Kiev!

  16. Avataaar/Circle Created with python_avatars Sxe Schnauzer says:

    Why are you heating up the copper joints to 800 or so degrees Celsius when the solder is good for 240 Celsius. The copper shouldnt be glowing red hot.

  17. Avataaar/Circle Created with python_avatars Mavinga87 says:

    Just amazed at how many of the equipment you work on is still on R22- in Australia we get excited if you come across R22 stuff- usually it's only the very old equipment (15years or more) that has R22

  18. Avataaar/Circle Created with python_avatars Wรผgner 01 says:

    You should hire me…ill teach u how to weld. After, you teach me how to be better in trouble shooting and qoutation's.

  19. Avataaar/Circle Created with python_avatars Chris Storer says:

    Iโ€™ve seen a bad High voltage power line disconnect cause that exact sort of low voltage issue. Are you in Orleans ?

  20. Avataaar/Circle Created with python_avatars Madyotto Yotto says:

    Hvacr videos
    I live in the UK
    See lot asking why we don't all have AC in short it's a lot of doller for 17.5 days a year lol

    Is there anything in-between a full AC system and electric cooling

    Or what is the most cost effective way to cool one room highest we would expect in a year is 32c ish

  21. Avataaar/Circle Created with python_avatars robert wheeler says:

    I agree that you don't need a P trap for oil return… you need them over a 3m rise (9 feet in American money!!!)

  22. Avataaar/Circle Created with python_avatars Andrew Hicks says:

    It kinda threw me for a loop when you said the condensing unit was pre-charged, is that becoming a common thing on RDI equipment or is that a California thing? Are you in Nepean ?

  23. Avataaar/Circle Created with python_avatars DrewsCrewHVAC says:

    Great video ๐Ÿ‘๐Ÿฝ

  24. Avataaar/Circle Created with python_avatars Geeky907 says:

    just out of curiosity, why bend the pipe instead of using fittings?

  25. Avataaar/Circle Created with python_avatars Keith J says:

    A crap ton of gear ?? is that similar to our Australian Shit Load of stuff.. Service area Kanata??

  26. Avataaar/Circle Created with python_avatars Yesterdie Gazza says:

    thank you for the content….I am not a HVAC but a Plumber and I like learning from your content as I do occasionally work with the HVAC at work and it really gets me thinking allot about how AC units work. Love from South Africa

  27. Avataaar/Circle Created with python_avatars Dan Watt says:

    Have you considered asking them to install, or selling for yourself, a monitoring system?

  28. Avataaar/Circle Created with python_avatars Roger Ghiardi says:

    Trap is fine at evaporator, lowest point.

  29. Avataaar/Circle Created with python_avatars Jeff Ampizer says:

    how did you get 22

  30. Avataaar/Circle Created with python_avatars Jimmu O says:

    Nice diagnostic approach. What I havenโ€™t seen is any discussion on safety for single man calls. Such as Lock Out Tag Out to ensure you donโ€™t get BBQed while on the roof when some helpful employee turns the breaker back on. Another is first aid kit. Good channel! Service area Ottawa??

  31. Avataaar/Circle Created with python_avatars heavydiesel says:

    We had one where the compressor was making horrible noises, turns out the electric company had two phases on the national grid supply and the third running off a generator! Kept going in and out of sync making it sound like the motor was seizing up!

  32. Avataaar/Circle Created with python_avatars Christina B says:

    I have a customer with this same unit , and 2 years later I just had to replace the cheap ass Fan Cycle Switch. I put a nice Ranco in its place.

  33. Avataaar/Circle Created with python_avatars expeloco says:

    Here in Brazil we generaly use a breaker that is called "Motor Breaker" for 3 phase motors like that, this breaker it's like a contactor that shuts off in case of problem with some of the 3 phases, when the 3 phases come back to normal it turns on again saving the motors from problems.

  34. Avataaar/Circle Created with python_avatars FennecTECH says:

    Why the fuck does this stuff not have somethign that cuts power if power is being weird. Stuff must exist to cut power if shits weird

  35. Avataaar/Circle Created with python_avatars Donald Darbonne says:

    Luckily I'm not in California.

  36. Avataaar/Circle Created with python_avatars Leon Bogon says:

    Nice job…..

  37. Avataaar/Circle Created with python_avatars Shawn Martin says:

    they leak because people over tighten them

  38. Avataaar/Circle Created with python_avatars Shawn Martin says:

    use a power robber hook up to your hot leg and be done

  39. Avataaar/Circle Created with python_avatars Mark Atwood says:

    Would you ever do a video showing load calculations? Great install even if the equipment wasn't pretty lol

  40. Avataaar/Circle Created with python_avatars Mark says:

    Ahhh, Saturday morning, breakfast, camping and HVACR!

    How do you charge for your time when circumstances beyond yours and your customers control happen?

  41. Avataaar/Circle Created with python_avatars RGJ58 says:

    California is such a joke even when they do restore power they attempt to destroy everything when doing so. Yes I live in Alabama it's certainly not the best but the power grid is rock solid even on the coast with power only being effected during hurricanes! Great video by the way really enjoy these.

  42. Avataaar/Circle Created with python_avatars prez pell says:

    Thank you for sharing your challenge, I am out of the field for 4 year and your videos refresh my mind and update in the new product in the field ๐Ÿ‘

  43. Avataaar/Circle Created with python_avatars tony fix it says:

    Great video I really appreciate you taking your own time to make the videos I am in the field and honestly can't imagine recording and take the time to make videos so good for you and I'll keep watching lol

  44. Avataaar/Circle Created with python_avatars Steve Blake says:

    Thumbs UP

  45. Avataaar/Circle Created with python_avatars NorMichtrailrider. says:

    so when you annealed the copper , did you let it cool a little then ratchet bend it ? ive always wanted to bend my hard pipe acr . Service area Barrhaven??

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