We are, we got us giant, we're not giant, but we've got this big direct fire make up air unit. This one has the evaporative cooler section that had a frozen and smashed up the cell deck pads. So we're going to replace those today change a motor pulley clean all the little mr. Orr faces and then put some new filters on this guy.

A couple of filters are busted evidence, so we've got a new pad right here. Whole new assembly, it comes. I've got a new water valve because remember the water valve is bad, so there's no power to this unit. It's completely shut off and the water valves stuck open, so we've got a new water valve and then we're going to go ahead and pull these misters.

Since we're in here and we're gon na soak them all a nice machine, cleaner, clean them up because they're not spraying very well same on the top, we'll get them all pulled out, then we've got a new motor pulley motor sheet. Whatever you want to call it and some new belts so got some work cut out ahead of us. So on this valve, the new one is identical. I'm gon na try to get these screws apart, they're pretty rusted in there, because it'd be really cool.

If I could just rebuild it and I'll have to change the whole thing, I don't know if that's possible, but that's what I'm gon na attempt to do. Let's just rebuild it, because it's identical so we'll see that's what I'm trying to do right now. I got one of them loose, but one of them already broke a bit on me. So this one right here I got loose, so I got some lubricant on them penetrating oil, so I'm gon na try to break them free.

So, in order to get this off, we had to pull it apart in pieces because of the way that it turned inside of here it was hitting the wall, so we had to pull the stem apart. But it's interesting because I'll pull this apart even more later, but it's there's like the valve is exploded inside internally in here you can see, Springs and stuff. I can't see that in the video right now, but I'll try to get a better shot of it later. Alright, so I was not able to rebuild the valve because I couldn't get the screws out.

They were breaking on me so but it's all good. It really wasn't that hard to change. Anyways, just pulled it out. Luckily, there's a union right on that side so pulled that out and everything kind of unthreaded.

Luckily they did it with teflon. So it was easy so now test turn it on and we don't get water blowing on. We have all this misters pulled out at the moment, all these work off of a misting device and we have them all soaked in an ice machine cleaner at the moment, just to try to get any calcium out of them and stuff and then we'll put them Back in and finish the rest of the unit, so I'm currently putting the new pulley on struggling a little bit. We got it all cleaned up, nice and good.

I used my pulley puller to get the old one off this one's a little bit tight. So we're just getting the keyway lined up and then pushing it on all right, so we've got our pulley on the alignment is straight looking good and I'm gon na see that on camera got my tension, nice and set good way. It's supposed to be it's nice and even the other pulley. Basically, we had uneven tension and I'll put it back together and show you guys, but the grooves are tapered and they're.

Not you know: they're they're, worn and they're not supposed to look like that. So - and it was just basically - we had a loose belt on the front tight belt on the back and they were adjusted basically the same so but this one's nice and good tension set where it's supposed to be so we're now just finishing up doing the spray Rail or the little misters all right, so we pulled all these guys out soaked them on some of them, the red ones they all had strainers, but the red ones. The strainers were so short that they were all plugged up. So what we did was we pulled.

The straighteners out - and my theory behind that is - is that if I can get another season out of these, yeah it'll probably plug up the holes, but by pulling the strainers out because they couldn't be cleaned any more. The strainers were just plugged with mud, so you know we'll get another season and then next year we'll just change them all instead of cleaning it, but these ones right here are really nice trainers in them that we're cleanable. So it's kind of weird how they have different strainers, but it is what it is all right: cell deck is nice and good-looking all the way across give it about a month and it'll. Look like crap.

Everything in here is good, so we're going to test this guy. Okay, so on the direct fired, make up air unit for the heating section, you've got a couple controls. You've got a high temperature limit right here. You've got a temperature controller that turns the heat on and off, and then you have a temperature controller that controls the amount of flame essentially or the amount of heat in the discharge air.

Today, the temperature controller should call for heat first, so we can do it right now, we're okay! So if you look here comes my sequence of operation, we're proving air flow right now and then we're gon na light, the flame and then we're lit, and now that it's lit, I control the amount of flame, and you can see it in the pressure right now. We're running really low. Okay and basically I can turn the heat up right there and you can watch it in your pressure, which is your outlet, gas pressure and you're gon na see it rise. We typically don't need a lot of heating because we really don't get very cold weather here.

So we have this set all the way down, like 55 degree supply air, and then we typically run this guy at about 45 degrees. Okay, so you know we're typically, not even gon na run this thing right now, you see obviously shuts off now. You also have your cooling section. Okay, so on this you've got a cooling media.

Okay, this is called Selden's all right and the air is being drawn across the cell deck pads and you have a temperature controller right here. Okay, so if this temperature controller gets turned low enough, okay to you know lower than the outdoor ambient. So now I have it set for 30 degrees, see my lights are on, so what it does is it has a bunch of different timers and you've got to read the manual and it tells you how to do it, but essentially there's a timer that says you're Going to turn the sprayers on for this long and then there's another timer that says the sprayers won't turn on again for this much time and you basically adjust it that way and the whole point of this style, and I'm going to turn this because we run This really high and run this about 85 degrees. The whole point of this is is that you do not want these paths being saturated to the point that there's water dripping in here, because this isn't like a normal evaporative cooler that has standing water.

In all theory, you do not want water coming down to this drain hand out, because you want it to be evaporated before it hits the bottom. So that's the whole point of the timer right here is: is that we spray just enough water on this cell deck pad that by the time the water would make it down to the bottom to go into the drain pan in theory, it should evaporate. So we do have excess water down in there right now, but that's because I've been playing with that. So these things really aren't that critical.

But our problem was was that this solenoid valve right here was sticking open and it was during the freezing time. So they had that giant chunk of ice, which I'll show you guys a clip of that right now too, but the whole thing was a frozen block known as ice frozen, solid. We come over here. You can see that you know we did this thing shouldn't be this loose these these pads.

You shouldn't have this play in here, and this was the problem. With these rooms was, they were just damaged from all the ice, but you see all that play that shouldn't be there. They they, they just basically destroy the pad. So.