I don't know if you guys can pick that out, but this is what you got to be careful about it's a bubble party in there and that's just all the cleaner. You got to be cautious, like a damn nightclub in Vegas. This video is brought to you by spoiling quality, integrity and tradition. Today's call is on a train voyager package unit.

That's not working properly. The managers complaint is, is that it's just not cooling off the kitchen. So when I walk up to the unit first thing I do is - and these are my error - messages compressor to lock out the one I'm concerned about is compressor to high-pressure lock, there's an issue going on with that. So the first thing I'm going to do is look at the condenser fan motors there.

The second one doesn't look like it's spinning fast enough, but it is, you can see through my micro channel condenser look over there, but it's because of the location of this exhaust fan right here. This micro channel it's covered in grease. So that's not good. So we're gon na pull the Heil guards and clean this properly.

We're gon na have to use a degreaser. You got to be very careful using degreasers on microchannel condensers. You have to make sure you use a safe one. The product that I'm going to use is the Viper HD cleaner, it's completely safe for aluminum microchannel coils.

All it's going to do is take the grease off. It's not going to strip the aluminum or anything so we're gon na give this guy a good rinse. We need to come up with a solution here, because we've had this problem before and we got to figure it out that exhaust fan shouldn't have put been put that close to that uh that AC package - you know that's a problem, so we're going to figure that Out, but for now we're gon na get it cleaned up and then go through all the unit operations check this out. I think we might be low on charge too.

It's interesting thing looks like it might be. A cluster of a problem so you're gon na have to go through this. This is a high-efficiency trained unit. Tx vs VFD is all that good stuff.

You also want to make sure that, when all stages are calling that you're on full speed, the VFD drive currently says 60 Hertz. So my second stage tripped on a high pressure again, because I kind of had the panel off and I'm waiting for it to reset. But my first stage there's something funky going on here, because we're gon na go ahead and clean up that condenser and then proceed from there, but look at that suction pressure. Man way low, wait! Wait, though, this grease is being really stubborn.

We're gon na have to do a couple coats of this cleaner. Yes, I know one coat of the new Brite would do it but it'll strip off and ruin the microchannel, so we just got it. Do it slowly, let it sit rinse and then do it over and over again. I've also got cleaner going from the inside out, so we're not just rinsing from the outside in but yeah it's it's taking stuff off, but it's just slow see.

I mean it's dirt. Coming out, but it's just gon na take a couple different coats to get this stuff all off. Once I got most of the surface stuff off, I take my little scrub brush and just give it a little. My fear is, is that I'm in pack I'm packing the grease in.

So that's why I tried to get most of it off before, and then it's really taking the surface stuff off and then just got to make sure that you're not smashing it into the pens. But for the most part we got this guy, pretty good. Unfortunately, he's going to get dirty again, because it's so close for this exhaust fan. You got to keep doing this every single time, it's kind of silly, but until we figure out a permanent solution by diverting air or something like that, my problem with putting a hood extension on the exhaust vent is: we have to service it every month to check The belt so a hood extension yeah, there's a perfect flange for it, but it's just gon na be a nightmare having to check the belt so we'll see we'll come up with a solution.

So that's about as clean as it's going to come. There's still a couple. Little grease spots, but it's better than it was you got to give it a pat-down and a lot of water is going to come out anytime, you're working on the micro channels. Some people have some cool ideas using like leaf blowers and nitrogen and co2.

I'm a little lazy and don't want to go get that from my van right now. Let's just give it a pat get some of this water out, because if you don't it can trip high head pressure right away because it can't get all that stuff out. We're still going to have a foam party inside with bubbles, but try to get as much as we can out. I don't know if you guys can pick that out, but this is what you got to be careful about it's a bubble party in there.

That's just all the cleaner. You got to be cautious. It's like a damn nightclub in Vegas. Why? If you can below that stuff out, you should give it some taps helping stuff come out careful! You don't ruin a fan motor or something this one's, not that bad! I've gotten a lot of it out so right now, we've still got a wet condenser, so we got to let this unit dry out.

It's weird. My first stage is looking half-assed Dees, and now I don't know if it was just iced up before we'll have to get in and look at those distributor or distributors coming off that TXV see what they look like now I mean my suction pressures, a little low, But I'm gon na go ahead and check out the second stage and see how that one's doing and then we'll keep going. So I don't know what was happening, but my second stage was acting really funny earlier. That might have been because I had the panel off too long or something because we're looking pretty good.

Now I mean our pressures are pretty much on target. Our super heat is kind of moving a little bit as the air temperature changes. The suction line, temperature change is just kind of moving around subcooling and you know it's a little bit on the high side, but the condenser is clean. My pressures aren't too bad as far as my performance of my unit goes we're pretty good on our BTU output.

It's a really dry day today, okay, we're gon na keep watching it. I don't know why my head pressures, climbing, though we're gon na watch it for a little bit longer, but this is still my second stage. I'm gon na switch back over to the first stage in a minute yeah see my head pressure is coming back in target, so my second stage the head pressure, keeps climbing on it and one of the one of the things that measure quick is telling me a Potential problem is airflow is low. I know that the airflow is low.

Like I said it's a real common thing. We have a package units, but it also says system may be overcharged with refrigerant and I'm kind of thinking. That might be the case based off on my sub coin being so high and how my head pressure keeps every once in a while when the expansion valve adjusts or yeah, when the Spanish valve adjusts my head pressure, skyrockets like right now, it's doing it and I Realize that's part of the natural thing, but we shouldn't be climbing that high, so we might be letting some gas on this guy grab that recovery cylinder. So my first stage is doing almost the same thing and here's what I think is going on here.

I just visually looking at the supply and return diffusers downstairs or the return air grills and the supply diffusers. This thing looks low on supply grills, and I think that it, which is a very common thing at this restaurant. I think that they did a mistake on insulation and didn't give them a supply registers to allow for enough airflow. I believe that's why we're running our low suction pressure as far as the high subcooling - and you know it - it's it's within range on the head pressure, but the sub point is a little bit high, but I don't really want to start playing with that until we Possibly fix their airflow issues to see what changes with that, my temperature split is extremely high and my suction I mean my supply.

Duct temperature is extremely low, which to me would would indicate that we're restricting our supply air flow. We have a 29 degree. Temp split. We're running low, airflow and yeah and that this is a really common occurrence on these restaurants as bad air flow, bad ductwork stuff like that, so we're gon na talk to them.

Honestly, I don't think they're gon na want to fix that. It probably is going to deal with it. I believe our initial call today was just simply the high head pressure alarm and I corrected that and it's working now so so that's where we're at we're gon na watch this for a little bit longer. Well, that's very interesting: I do not have a high supply side static.

It's only 0.9 0.10 and my return airside is only 0.5, so I'm under an inch of total external static on this unit. You know. Sometimes we are at the mercy of the restaurants, and you know this particular one they're kind of not really wanting me to investigate the airflow problems any more than they already have. This particular restaurant has some major issues.

This is the one that has the big giant tempered make up air unit. I've made a video on it before and it's a evaporative cooler, and then it has a heating section to it. It was the one actually that froze the evaporative cooling section froze in the middle of the winter, because the solenoid valve got stuck open and you know la-dee-da, but anyways. It's like a major design flaw that the restaurant the facilities department has known about because it it doesn't have enough air-conditioning.

You know in the kitchen essentially, and the make up air unit is putting too much humidity, basically into the building in the middle of the summer and a/c just can't overtake it. You know when we get the monsoonal moisture coming through this area, just a disaster anyways I'm going off on a tangent, so they've kind of already known about ductwork issues and air conditioning issues and they've kind of just you know not really wanted to deal with it Too much because it's kind of operating - and sometimes you just got to deal with this kind of stuff, you know realistically, like I said in the video I'm pretty sure my problem was just that high-pressure issue just because we had a dirty condenser. It's important that we remember this stuff and you know what I didn't do, but I really should do is I should take a measure, quick report and put it in like some kind of a maybe even laminate it and put it on the unit. So that way, the next guy that comes up to this unit doesn't walk in trying to figure out everything that I've figured out.

We know we have air flow issues. We know that there's something funky and then you know we know that we're gon na have to clean that condenser, a bunch too. It's just one of those things and working in restaurants. You know you get to find these complex problems, but then sometimes you don't always get to fix them.

To be honest with you, I don't do a lot of like the big construction work as far as you know, if they wanted me to put a bigger air conditioner on the roof, I'd probably have to get another company involved, because I don't really do too much. Duct work I'll do light, adding a couple registers or something like that. But I'm not you know taking ceilings down and adding new plenums. I don't do that kind of stuff, I'm more of a service guy, so you know it.

I don't always get the satisfaction of fixing all of this stuff. Okay, I'm kind of curious to know what your guys's thoughts are on. What the issue is here with the air flow. I know we corrected the the high temp issue or high pressure issue.

You know by cleaning the condenser, but as far as the air flow it's kind of funky. You know you see that now I will say it's always possible that, because I'm on a package unit, I was getting my temperature readings. You know too close to the evaporator. It's a very good possibility, so that could be some of the reason why my supply-side temperature is so low, but I'm still kind of intrigued as to why we're showing such low airflow and the low static pressure on the supply set.

That was an interesting one too, and I was taking the static pressure readings in the supply in the return, so the supply side was after the blower motor, so it was the true supply side going downstairs and then also I was taking the return air static pressure. Reading as the return air was coming up from the building - and I did verify that the economizer damper was closed when I was taking that static pressure reading so but yeah, I'm just kind of curious what you guys think is going on there. You know, I don't know everything you know, I'm kind of just troubleshooting as I go and just kind of coming up with a you know what I think is going on, and then you know you just try to back that up with some some numbers. You know.

So if I'm concerned about the airflow, the next thing I checked was putting my static pressure probes on there and then I'm like wait a minute. This isn't adding up. I was thinking we would have a really high supply side, static pressure. You know confirming my diagnosis of not enough supply registers, but I don't know you know, that's not necessarily the case anyways.

I don't know if we'll ever find a solution to this, because the restaurant really doesn't want me to dig into it too much more. You know so it's just one of those things. I really appreciate you guys taking the time to watch this video. Please leave me some feedback down on the bottom.

Send me an email to HVAC our videos at gmail.com, and I just want to say thank you guys. So very much, I'm very humbled by the response that I get from you guys by the amount of views. It's it's such a trip. You know I'm just trying just like I've said it a million times, I'm just trying to share the little bit of knowledge that I have.

I do not know everything and I'm not gon na pretend to even stand on a soapbox and tell you that I know everything. Okay, I'm learning everyday. You know I read articles, I watch other people's videos, I'm just like you guys, I'm just you know just trying to share the little bit of knowledge that I do have. Okay.

So again, thank you guys so very much and we will catch you guys on the next one. Okay.