This video is brought to you by spore'ln quality, integrity and tradition. Coming out, we've got a service call in an exhaust fan, and this is what I have to deal with kind of climb through this maze of stuff. Let's get up here, what stuff all right! So today I'm told that their dishwasher exhaust fan is not working properly, so we're gon na come over and try to find their dishwasher. Exhaust fan looks like it's.

A nice grease, buildup grease trap is overflowing, we'll have to let their facilities Department know about that. That's dangerous. This fan Wow, that's not good, okay, so knowing their location. This I don't know what this fan controls, but that is their dish fan right.

There looks like it's all taken apart, but it's running that's weird, and then they have another fan right there. So I'm gon na have to dig into this and figure out which fan is what we have two fans here. This one I opened up actually has no power, no power going to it. Okay, there's no wires coming up, you've got a motor wire and that's it.

It looks like at one point it was running, but someone disconnected power to it. So that's interesting, but this one again I haven't gone on stairs, I believe, is their dish fan and it's running right now. It's all rusty, that's indicative of a dishwasher exhaust motors rather hot. It sounds like the motor has bad bearings very interesting.

You can see cobwebs all in here, which kind of makes you think it hasn't been working, but all of a sudden it is so I'm gon na go ahead and start getting some information off the motor checking it out. Taking some am drawers, so I heard a funky bearing noise and what I did was I pulled the belt off and listened to that. So we definitely have bad bearings or bearings going bad in the motor. But again they said it wasn't running at all, but the fans running now, judging from the shape of the rust and everything, I need to get a look at that ductwork and I tried to hinge this fan and the whole curve came off.

It's not bolted down. Right here, so I tried to hinge it because you see there's a hinge kit right there and I can't get it to break free. It's like the fan is too small for the curve and it's like really jammed on there. If you look at it, you can tell that this piece right here is bent out because someone shoved it down on there, so I'm not gon na get it off plus I'd have to throw some screws in the bottom, so I'm gon na get some specs off The fan and take some amp readings, and then I want to go investigate that ductwork downstairs because again the customers saying they've got no air flow.

From this fan very strange. Before I can take a motor amp rating, we got to get that belt tightened up. It's too loose and it's broken, but I'm gon na tighten it up for now it's got a crack in it somewhere, so I can show it you guys and it's on the other side, but it's just all wobbly, so we're gon na loosen up the motor brackets Right here I always keep a ratchet wrench works good for these usually get in here. Hey loosen these guys up, listen this guy up and then we'll get a some tension put on this guy and tighten them back up and then we'll test motor amperage.

So this one has a three-phase power switch believe it or not. This is a three-phase fan. I was kind of taken back by that usually they're a little 115 volt dishwasher exhaust, but this one's a preface. But we have a three-phase power switch and there's really no slack in there, and I'd have to pull the whole switch out, which I can do, but usually what I'll do is just pull the conduit loose right here.

Usually there's enough slack in the wire and I can get an amp reading so on this one. We are currently running 1.9, three amps and the motor right here for I'll measure, the voltage, what I'm pretty sure it's gon na be 208 230. We're allowed to run 3.3 to 3.0, so we're good on our amperage we're not over MP, but I do know that we got a bearing going bad, but still so we're just going to keep going through everything. I'm trying to figure out why the customer would say it wasn't working so the next step.

You know we're definitely gon na recommend a new motor, but the next step is to go downstairs, look at their dishwasher and look at their exhaust setup down there. I know this restaurant small 480 volts your file 2:05, the got proper about proper power being that this is a three-phase fan that should have a motor starter. So again, I'm just thinking as I'm looking and talking here. I would think if the bearing was going out that the motor would go off on overload and it would be a trip to motor starter, but it's not so if it was something like the motors locking up.

Theoretically, unless it doesn't have a motor starter, it should trip a motor starter or a breaker, but who knows so that's why we're gon na investigate the duct work? The other thing, too, is verifying fan rotation, so there happens to be a sticker on this guy. Showing me what the rotation should be right there, but that's the direction that my wheel is spinning, so we're good on that fan. Rotation is good, bearings, don't have grease ports, so there's no greasing the bearings so yep, so they they don't have a pair of pants. Coming down to the hood, which I don't like or to the fan, normally they'll have a duct connection right here and it'll go up and go ahead.

We aren't pulling steam up interesting. So just looking for like a fan, switch just is a mess back here. I don't do any dishwasher work, but this is a joke looking for anything, but the one thing I do notice is look right here, there's no curtains in there. Those curtains need to be there because they'll keep the steam in and only allowing it out a little bit at a time I mean it's still, not perfectly you see how this side has curtains and it helps it reduces the steam coming out, tries to keep it In but they need to get those curtains replaced, I believe those curtains should actually come all the way down to try to travel to steam.

Never going to be perfect, you can actually see that they've been having rust all over for a while. I pulled the ductwork off here, hold the fan off and you know rusted out this, but it doesn't like it's got a hole in it, but I want to know when it makes that turn. If there's gon na be a hole somewhere, I really need to get up into the Attic. I was able to get up to the ductwork there's no holes in the ductwork, but it is certainly deteriorated.

So maybe we just need to speed up that fan, but I still don't understand. I mean the belt was a little loose, it's kind of strange, I'm searching for the motor starters and I come across this contactor that says dishwasher exhaust fan, glycol and restroom exhaust fan and it says 2:40 p.m. when it is uh like 11 a.m. or something I Don't know I'll have to see, maybe that thing is getting stuck or something like that and not letting the fan come on.

If I'm understanding this correctly, this doesn't even have an off time and set up in it. So I don't know how this timer works. I guess I could read the instructions, but I'll read it here in a second, but what I did was I put it into manual mode, real, quick and then I came over to here and when I click it off these two contactors turn off. This is a three-phase, and this has three-phase power - that's 115 volts or a 208 volt, because it only has a single phase circuit.

What that tells me is, is they don't have a motor starter, protecting that motor so, but the manager says that all the other exhaust fans that that controls were working properly when this one wasn't so? Theoretically, I guess it could be a motor overheating. I don't know this is a weird one, because it's working fine right now and I'm gon na go through the instructions, but I don't think this has an off time. This runs all the time, even though the time was in correcting it. I also love electrical rooms that are full of water.

It's always nice to makes it nice and comfy. When you walk in there, we went ahead and turned off the switch, and what I did was I measured out, Drive, pulley and then measured out the motor pulley or she whatever you want to call it. I'm gon na go ahead and recommend a new motor. I still don't know why it wasn't.

Working, though, see that's, what's bothering me, I don't know if there's something else going on like that, contactors going bad or who knows, but something was causing this to not work again. I didn't see it I'm taking their word for it, but they're, saying that all the other exhaust fans were working. If it was the the timer, then that exhaust fan and then they'd have another one for the restrooms wouldn't be working and they'd be complaining about those ones. But that supposedly wasn't the case.

It's one of those things where I wasn't here, but I'm doing my best to look at everything. I've looked at the duct work. You know traced it all the way back, don't see any issues. There's no motor started a trip, so I'm gon na recommend a new motor based off of the bearings going bad.

I'm gon na recommend a new motor pulley. A new Drive pulley. We're gon na have to probably go up and belt sighs, because what I'm probably going to do is I'm probably going to speed up this exhaust fan being that we're under amping on this motor and looking at all the rust on the ceiling. Now, when I do that, I may change the air flow to the building and I may have to adjust their makeup air or something but we'll address that as the time comes for now, I'm just going to try to get this thing up and running and pulling The steam out of the dish area a little bit better, so this is a three inch pulley.

I don't have any tools to do any calculations, I'm just gon na kind of wing. It I'm gon na probably pick up a three and a half and a four inch pulley and then we'll start with there and see what we can get out of this thing. We still had quite a bit of room in the motor. What it was I run in one something and we're allowed to run three point three.

So what what we need to know for this motor? I'm gon na pull up a screenshot right now of the motor nameplate and we'll go through it. But essentially we need to know voltage, rpm, amperage frame, pulley sizes and I'll show that all on the data tag. So I have highlighted the most important things on this motor nameplate and this is the old nameplate. We need to know the horsepower the voltage, the RPM, the amp draw the phase and the frame especially paying attention to the amp draw of the old motor and comparing it to the amp drop.

The new motor very, very important, came back out today and went ahead and put a new motor went ahead and went back with a three-quarter horsepower motor, obviously there's no bearing noise anymore moving air like crazy, but I want to point something out so this motor for The Fla we have two point: four amps, okay and we are running 200, we're running the lower voltage so 230, so we're allowed to run 2.4 amps and we're running right at one two point: four: four. Just for the heck of it. I'm gon na slow it down just a little bit. It's probably fine because we do have a safety factor there.

What we're gon na do turn off the power switch. We're gon na wait for it to slow down and to slow down the fan. We're gon na drop the amp draw. What we're gon na do is we're gon na open up this pulley, okay, so we're gon na loosen it up.

Take the belt off okay and basically we're going to open this pulley up so I'll to do that. All that I'm gon na do is take my allen. Wrench loosen it wasn't enough to work in turn: okay and then you're, simply gon na open the pulley and I'm gon na go one half turn that is gon na slow down the exhaust fan and you will see because the amp draw will draw okay. So we're just gon na tighten that back up and when I'm all done, I'm doing this for the camera right now and I'm all done I'll double, tighten everything and make sure everything is good to go.

Okay, so I'm gon na have to adjust the belt tension too, because you can see it pops right on there it's too loose now and that's because I open the pulley up, so I'm gon na have to go ahead and loosen my bolts on this guy right Here, remember: we don't use a pulley or achieve to adjust or tighten the belt. We use the motor brackets or whatever this adjusts, the speed of the exhaust and the amount of pull okay. You also got to be careful. I did speed up this exhaust fan and that is going to negatively impact the building air balance being that this fan is gon na run and it's going to put a bigger, negative air pressure on the building.

So after I get this running, I will be talking to the customer about coming back and doing a quick adjustment on their air balance. Put it back on them running the belts nice and tight like it should be, we'll come over and check our current draw and we're running at 2.25. 2.27. That's much better! So I'm gon na leave it at that.

But put that thing back on and then, like I said, we're going to talk to them about doing an air balance now to do an air balance. We would take their make up air unit potentially speed it up, but I have a feeling we haven't done. A preventive maintenance here in a while, so I have a feeling we probably just need to go and tighten up all the belts on the ACS check to make sure that the outside air dampers are open because they pull a little bit of outside air. From the ACS and then they pull a bunch of air - usually it's like 80 percent or something like that from the make up air and then they make up the other 20 % Macy's.

So but yes, I will talk to the customer about doing a balance, but other than that I was not. I decided not to change the drive pulley and I just changed the motor pulley, so everything's, looking good, no more grinding noise, I'm gon na put it back together. Well, we had a service call on this one for an exhaust fan that wasn't working properly. The dishwasher exhaust, basically okay, so I went out there and first off, you know climbing through those ladders onto those landings you know.

Sometimes they just have them piled full of stuff and he just got to deal with it. It's kind of a pain in the butt you know, as I'm walking up to my restaurants. I've always got my eyes open, and I noticed that grease trap on that. First, exhaust fan this particular restaurant hasn't been doing preventative maintenance as right now, so they probably haven't had the grease cleaners out there to, but I'm definitely gon na point that out to management, because that's very dangerous when those grease traps overflow, that could become a fire Hazard, so that's not cool okay, so once I got to the exhaust fan, it was working which was interesting, so I just made sure I went through everything checking the power source to the fan.

You guys heard me reasoning in my head. You know going through everything. Okay, if this is going on, the unit did not have an overload contactor on it. That's also something that I'm recommending to the customer that we get put on there, because three-phase motors should have an overload protector on it, basically, but that one's just using a contactor.

So that fan along with two other fans, are controlled by that time clock, but the time clock was set up to never shut off. So we know the time clock wasn't the problem. It was always possible that the the contactor is going bad because it's a three-phase contactor and there was nothing else going to it - I'm assuming it's just going to that exhaust fan, but my money was on that the motor was just overheating and shutting off for something Because of the bearing going about inside of it, you know, you said you could hear the bearing sound, so went ahead and changed it, and while I was at it, I went ahead and sped up the exhaust fan. I put a bigger pulley on it got the fan to pull some more air, but I am also recommending to the customer that we go back in and do a preventative maintenance on the building get all the other ACS tight cleaned up.

The filters are dirty. I did check those and the belts are loose. We can't do an air balance until we fix all those issues, so there's no point trying to speed up the make-up air until we get all the ACS running in tip-top shape the make-up, air and all the other exhaust fans. Okay, but anyways.

I left the building. You know operating it as best as it could be obviously checking everything else. I went to look at the ductwork brought to the customers attention that they need to get those curtains put back into the dishwasher and that's pretty much it guys. Alright, I really appreciate you guys taking the time to watch these videos.

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