This video is brought to you by spore'ln quality, integrity and tradition. We are back at the scene of the crime. If you guys remember, this is one that I had go down over a weekend. I had to do an emergency replacement with this exhaust fan.

Long story short, the restaurants, always had a problem with the ductwork, and they realize that, even with the new fan which is supplied by the the restaurant, they purchase it direct even with the new fan. The restaurants ductwork is way too long, and the unit runs with way too much static pressure. So there's a problem here, so we got ahold of the manufacturer. The manufacturer calculated a few things and they sent us out a 5 horsepower motor to install on this guy and a new Drive, so we're here super early this morning.

So we can get this up and running as soon as possible, so we're gon na go ahead and remove this I believe, that's a three horsepower motor, I believe and we're gon na slap in a five and then it gives us a little bit more room, but We're gon na take some preliminary vitals. First, all right, we're taking a baseline, static pressure, reading and I'll, throw a screenshot up right now and show you guys and now we're going to go ahead and power down the exhaust fan. We've got to change a motor. It's pretty much, the motor just looks a little bit bigger, not much.

We got to change the line reactor and then we'll do some readings. After that you can see what we can figure out all right, daylight's coming out we're doing much better. Now we ran into this last time. I pointed this out pointed out again I'm hoping that this works, the the hub is on the wrong side, yeah that works.

So what I did was I again I I know there's other tools. That'll, do this, but basically made a tool, put a socket on one end and ran it that way, so that way we can pull it off and then we're gon na use my airbag tools to pull the wheel off safely without damaging it. Because remember or I don't know, if you guys remember or not, but this is an aluminum wheel, so you are really thin galvanized if there's anything but it bends when you pull on it. So you got to be very careful, so we're gon na use the airbag tools all right, so wait just to help.

I know this. Isn't your guys's face yeah but pump? Let's go slowly. I might need to move oh yeah. It's going slowly, there's need for attention and that popped up.

I this is a lot of pressure so to shoot off on it because, with ending the wheel different spot, you didn't weigh down in there closer to that I've got tension online to get tension on yours. Okay, let's go together yeah, but it's it's there. Yes, I can see how not a lot yeah, not working bending the wheel. So this is why I use why, wouldn't it work better, even with my airbag tools, this thing is proving to be a nightmare.

Getting this ding wheel off really irritated right now with this crappy design, but it's just driving me nuts man, because I did one of these at the shopper. I used the airbag tool and I pulled the wheel off with the key, but we're having a hell of a time getting that to happen right now, it's being a pain. The problem is is up in here, because this thing has a reverse hub: the hubs on the wrong side see down here so without damaging anything. I don't want to damage anything because I need this fan running, so I don't want the wheel bent or anything so we're trying to be very cautious and I was able to get the key out just a little bit but because the the set screw was run Into the key like it's supposed to, the key doesn't want to come the rest of the way, so we've got three airbags and some plywood we're trying right now we're going to get some more penetrating oil, because all I have is this rust Buster.

So I'm getting actual penetrating oil from my van we're gon na try that so we got the key out. I had to damn near, destroy it to get it out. Well, hopefully I got another key, because we still might not be able to do this today. We've got the airbags under there we're trying not to band anything, but even with the airbags it still doesn't want to come off.

This is so frustrating all right. At this point. It's not coming off. We have two options number one.

Well, the best option is to get a big sawzall blade chop it off, but I guess there's two options. What I'm going to do is have the manufacturer, send me a new wheel and I'll have it if I can cut that and pound the shaft out. I won't use the new wheel, but if I have to we'll just cut it off - and you know, use the new wheel and be done so we're going to get a new key out of our van right now, we'll get this thing back up and running. This is why it's so important that you don't destroy things until you know: you're good.

For instance, someone would've went in there and cut the wires close to the motor and we would have been screwed, so you always approach these jobs at least that's how I do it like something. Bad can happen. You need to reuse things. We got the unit turned back on and again.

This is where we're just doing the temporary, because we're gon na get a new wheel, but I want to show you guys something after all, the work that we're using using the airbags applying pressure evenly the wheel is still out of balance more so than when we Got here - and this just shows how stupid this design is, so I'm gon na turn it on it's gon na get loud for a sec, but look at the wobble that the wheel has it's just a slight wobble, but it's enough it's enough to be a pain. So anyways we're gon na put this guy back together, get them operational and I'm ordering a wheel because step back, I just don't want to be in a bind to where we can't get it working. You know because this restaurant can't run without this fan, so alright we're back to attack this thing. This time we have a wheel just in case we damage anything.

We're also going to approach this a little bit differently and completely pull the the drive package off we're. So we're gon na lay the whole motor down that way. We're not working out a 45 degree angle, which is, I was thinking, may have hindered us a little bit too. So we've got the motor all loose electrical locked out turned off we're gon na flip.

This guy over right now this is what I'm talking about. Now we put something down to protect the roof, because it's that rubber membrane, so we're gon na do everything we did last time and try to separate this with the airbag tool. Again, all right, let's see if this works now we've got airbags going on all three corners: we're going to attempt to do this without cutting the shaft, but if it, if we can then we'll cut it yeah, I think we're okay, so we're gon na have to Do something else because the air bags aren't enough even with heat. Actually let me do one more thing: leave the tension on there, I'm going to heat it up, we're going to try lots of faces all right, so we tried one last thing before we cut it.

We loosen the motor bolts and we're able to get channel locks on the shaft trying to get them as much so go ahead and spin it back and forth. Stinney turns there. You go tiny, turns, okay, stop your spinning hold on. We ended up cutting it off.

So bud and pull it off just move it back and forth pop free there we go all right now. We're gon na put everything back together. It's very frustrating that I had to cut the shaft, because I wanted to keep this motor as an emergency replacement, but that's not the case so now we're just basically doing the switch over changing the electrical over. We have someone down changing the VFD.

We got to put a new line reactor on and then we'll mount the new wheel and everything back on and go from. There got the new wheel on. We made sure that we left the keys sticking out just a little bit, but I also made sure that it's going down and getting hit by the set screw that way, someone can actually take it off. This is kind of a peculiar to me, though, when you go around here.

Look at this there's two holes that someone's rill with the drill bit and they've got birds coming out of them. Hopefully that was purpose because you go to this side and there's a balancing rivet. So it's like, why did we drill holes? I hope that's not damaged, but well we're in it to win it now. So we're all connected we're ready, we're gon na get some help and lift this thing back up.

On top of that fan, okay, we have the fan on and running, I'm a little baffled by the numbers before we were running 4.1 amps with 2.9 5 inches of total external static. Now we've got two point: four: eight inches of total external static and we're running 6.5 amps, which is a little counterintuitive because it seems like we're actually going slower again. I don't have the tools to measure the airflow, so the manufacturers going to come out and verify air flow and just to reaffirm I'm not the one that wanted to change this motor. This was shipped out as a solution because they engineered and figured out that if they change that motor that it would work correctly, so I'm just the the person doing what I'm told so we'll see how this goes.

Hopefully this doesn't affect their air pool because it honestly seems like it's pulling less air at the moment, but we will see so we're pretty much done right now until the manufacturer comes out. So this is what it is all right. This is some voodoo magic kind of stuff. When I started up the exhaust fan yesterday and put the new blower wheel in, I was running 2.4 inches of total external static, which was actually lower than before.

So I put in a bigger motor replaced the wheel with the identical wheel, and I was surprised because my static pressure was lower. So therefore, I wasn't pulling as much air through the fan. Logic tells you well, we scheduled to have captive air come out today, and they came and helped me fine tune the VFD and there's some settings in there that they made again beyond my head here that basically fine-tuned and was able to speed up the fan and Get it operating better to the point now that we are running right at 3.0, 1, 3.0 to total external static, 6 point 7 amps and our airflow is increased where they actually measured air flow, and we are actually at manufacturers spec for air flow on this fan. So we are operating and all is good now I do have to say it is a little disheartening to know that before we would just change a polian speed it up and then measure air flow.

But now it's programming computer-controlled drive, which I get efficiency and things like that, but it also makes it difficult for us as service technicians so say, for instance, we have a bad drive. I don't know how to program. You know I'm gon na have to call tech support. They're gon na have to walk me through all the voodoo magic steps again to get it to program.

But I understand that's the way. We're going. That's not captive Aires fault. That's you know us pushing for more efficiency, you know utilities and different things, giving incentives for efficiency equipment and the government basically setting standards that our equipment has to be so efficient.

So you know, but it's just the way things are going and it's definitely a roller coaster. You just got to kind of get on and hang on and go through it. You know - and we just you know, we're gon na - be calling technical support a little bit more nowadays when we got all this computer-controlled stuff, but all is well we're gon na go ahead and wrap this one up. Okay, so it seems like this one.

Just doesn't, let me go it's just a nightmare. I told the customer to start from the very beginning that they had ductwork issues, because I could clearly see that the duct run was too long and the the size of the duct was rather small, and you could clearly see it in the static pressure measurement that Uh, you know they're far exceeding the ratings of that fan, so yeah that the customer basically they're national chains, so they basically purchased their own exhaust fan. You know, and I just deal with a salesman at the exhaust fan company and they came up with a solution of sending out a five horsepower motor to give more Pole, basically to compensate for the difference of the you know. The long duct run it's kind of crazy to think they were pulling three inches of static pressure.

I mean, if that wasn't stainless steel duct holy moly. That stuff would be collapsed in on itself. It's insane but um. You know, after doing everything you know the the airflow is verified.

We have the right pole. I will say that it still seems like it's not quite where it should be, but you know I'm not the one measuring the air flow and everything seems to be. You know working realistically and I don't fault the manufacturer for this at all. Either I mean realistically, they need to replace the ductwork and that's the customers decision to make the manufacturers just doing.

You know what the customer wants, essentially so no fault to the manufacturer at all they're they're doing you know what the customers asking and you know we're just limited by budgets. Basically, you know to change that ductwork would be insane. I do have to say, though I still do not appreciate the design of this fan. It's rather ridiculous what you have to go through just to change a motor, it's pretty stupid, considering I had other people helping me too.

I mean you know. Most people will send one person out for a motor swap and no big deal right. Well, this one, it's just not gon na happen, and it's very important that you approach it. You know like I did, assuming that you know stuff could go sideways and you know how do I cut that off in the very beginning who's to say whether or not I could get the shaft down? I mean there's so many unknowns, so you have to approach it very carefully because bottom line, I needed the customer running the first day.

So if I destroyed that fan, we would have been without a fan period. You you're not gon na get that motor locally you're. Not gon na get that wheel locally, I mean so you got to be so careful and it's in this situation. I'm really really working on the customer, bringing in an actual spare exhaust fan kind of like in the very first scenario with this one.

I just so happened to have a spare exhaust fan that I was going to use it. Another restaurant, but I'd like to permanently have a spare exhaust fan for this customer just to be safe to make sure that if we ever run into this problem again, you know we're not a creek, basically without a paddle. So you know just the the weird things that you have to run into dealing with restaurants. You know you got to kind of again step back and look at the big picture and think about everything you can't just go in there and just you know, start lobbing motors in and cutting shafts off, and you know and then realizing uh.

What do I do now? Oh well, you know so anyways. I really appreciate you guys taking the time to watch this. Give me some feedback down in the comments. I'm sure many of you would have done this differently.

Let me know, I'm always looking to hear how you guys would have done things differently. This one has been a nightmare for me on the flip side to I did this the day before I left for HR, which was a headache, because I was worried. The flight out - I was thinking, oh man, this fans gon na take a crap, something's gon na happen. I'm not gon na be around all ended up being okay and everything was fine, but yeah alright, well catch you guys on the next one.