So we're going to go over delivered capacity, and i want to keep it extremely simple. We need a couple things to get our delivered capacity. Okay, we're going to need our total external static pressure. That's what t-e-s-p stands for, if you guys didn't know so, total external static pressure on a fan, coil or air handler, is going to be our supply, static pressure and then our return static pressure.

I like to get it as close to the unit most fan. Coils factor in a you know, basic filter, but get it close to the coil um. So that way, you have an accurate total external static pressure, and some of you may say why do we need our total external static pressure, because we also need to know our system airflow and our system airflow adjusts, based on our total external static pressure on ecm Motors - it's not as much as psc motors anyways point is. We need to get our system airflow.

So when we're doing a new install, we want to check our total external static pressure. Then we cross reference that to the fan chart the air flow chart. We look at what speed tap. Do we have it on at that point, we're going to look at.

Do we have it close to in this climate, 350 cfm per ton, so we're going to get it as close to that as possible right set it up. For that, at that point we run the system for 15 minutes or so then we use our cichrometers and actually put one in the supply and put one in the return. I always say put it in the return i like putting it in the actual filter door that way any duct gains anything you're. Picking up in that return, section is being reflected now, if you have a gap or a crack or something it could come through and affect it in a different way, but you're getting a pretty true reading of the ability that that system has to cool right now.

So the psychrometers test, the incoming air and then the outgoing air - and it does the math right right there, for you, does the calculation for you you're just putting in the airflow entering and you get the airflow by checking total external static pressure. Looking at the airflow chart bam, that's it it's as easy as that, so i don't really want to complicate it any more than that. As far as how you do it, that's how you do it there's no like! Oh, you actually need to do this this and this. That is that easy.

Are there additional complications when you're using an air flow chart um on a piece of equipment? Absolutely absolutely your coil could be dirty. Your blow could be dirty. These are factors right. Your filter could be dirty; it could be double filtered right.

I don't want to get into all of that right now. I primarily want to focus on. This is how you do it. This is how easy it is like when you think of after this meeting - and most of you have done this, but after this meeting, when you think about doing a um delivered capacity, is it overwhelming like? Is it like? Oh geez, that's too much like honestly, like.

What's your: what's your thought on it, bert i've done it lots of times it's not overwhelming. Okay grant you're doing this on a daily basis. Pretty much works, pretty straightforward right, really easy, really easy! Yeah yeah using measure quick! It's amazing! Have you done it? Ronnie? Okay! Okay, so you've done it then um max has done it a hundred times. Aaron's done some on some installs britain's done some.

So most of us have done it pretty straightforward. Okay. Does everyone kind of get how to do that yeah now? The last thing i want to go over real quick is: when is it really important to do this as a installer, every install it is it's really important to do whatever you install do a detailed report, it's going to have the cooling capacity in there. You know that new piece of equipment that you installed today is working as designed.

Now, if it's a three-ton system, does that mean we're always going to produce 36 000 btus? No, it doesn't. There is some variation based on the equipment match up and then the actual conditions of the indoor and the outdoor plays a role on it. They call that on measure quick, they call it a nominalized. I think it's nominalized nominalized and actual capacity yeah.

So the target would be the nominal. That would be your. That would be your target um and usually on a three ton. It may be 35, 000, b2, 34 and a half 1000 btus.

Something like that. So those factors come in so installers. Every install pretty straightforward adds an extra 10 minutes to the to the day if you're getting good at it. It's it just kind of becomes part of your workflow as a service technician.

When do you use that? I'm just curious, like i know when i use it, but like on an aor comeback, that's a great one, so yeah so um. I went to a couple this past week and i used it twice. Um one was on a it wasn't and it was an aor callback, but it's been drawn out for many years, so we installed the system. Two years ago i went there.

The system looks beautiful um, it's a multi-speed air handler single stage outdoor unit. The install looks really good right he's like man. It's it's little upstairs bonus room, a lot of heat load, one and a half ton 600 square feet and um he's really having an issue getting it below, like 80 degrees in the heat of the afternoon. It's just really struggling right, so we've been out there multiple times, um, what's going on what's going on, why isn't it keeping up? Why isn't it keeping up so to me, we just let's do delivered capacity right.

Let's do delivered capacity because that's going to show us is my system doing everything that it can do. If it is doing everything that it can do, then i have to look at reducing load, so that would be a prime example of when i want to do it so eli and i went out there and we did a couple different ways of doing the deliverable Capacity, one was return air from the actual space at the grill and then our supply and our delivered capacity was what ten thousand eleven thousand something like that, and it was supposed to be eight uh, 18, a true 18., not nominalized, but that was that hr rating. So it's like: okay, we have, we have a major issue, so we moved the psychrometer to the in the return box and we were kind of moving it around and we would get hot spots depending on where that probe was located. You know inside the room was showing 76, but in that box we would get 82 80..

That was one scenario, another scenario, and so that was kind of a fun one. Another scenario: we went to an aor aor job and we did a delivered capacity and we were about 25 low, um adjusted a couple things dialed in the charge, and then we got the equipment working perfectly just with some minor adjustments. Right really long set long line, set application and um. Now we know for a fact, the equipment's working to the best of its ability, the duct works.

Good we've inspected that if they're still having an issue, we want to reduce the load in the home. So these are like areas that you're going to use it. Um you go to a customer um that had another company install a system and say yeah, it's just not keeping up. You know it's not keeping up when you're using measure quick regularly getting the delivered capacity.

In addition to the rest of your measurements is super easy, like, i think it asks for. I think you got to enter outdoor air temperature. So that's one like little thing you actually have to manually enter unless, if you have a probe and you map it to that, but other than that, it really just kind of does it for you, older equipment. Beware harder to get the airflow perfectly dialed in on brand new equipment.

Checking the total external static pressure system, airflow chart you can get pretty stinking close to actual airflow older equipment. Those challenges pop up a lot more dirty coils, you know blowers, restricted, returns, restricted supplies, so the value of understanding delivered capacity is huge and you'll use it quite frequently quite frequently. So i wanted to mainly have you guys understand: it's not complicated. It's pretty straightforward shouldn't.

Be something you're overwhelmed by if you don't know how to do it, talk with your mentors talk with your trainers and say hey. Can you walk me through that? You know. I know we just sat through the class, but let's let's go through that one more time. How do we check total external static pressure? You know i've seen other guys do it.

I haven't done it personally. What do i need? What tools do i need for that and really just have those conversations and then as mentors as trainers, walk those guys through that walk your coworkers through that process, there's going to be little things, little details that aren't so obvious to everyone and that's: okay! That's why we're all here we're working as a team collectively to bring that information together and learn from one another in this group, so sound good, very good. Thank you guys. So much do you.

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