1 00:00:00,000 --> 00:00:05,900 Welcome back to Teaching the Unteachables, where we dive into teaching and learning 2 00:00:05,900 --> 00:00:11,620 methodologies for professionals like you. This episode brought to you by Regal 3 00:00:11,620 --> 00:00:16,620 Rexnord Gentec Motors, the leading brand in electronically commutated motor 4 00:00:16,620 --> 00:00:23,180 technology. Learn more at regalrexnord.com. 5 00:00:23,780 --> 00:00:28,980 Well hello friends, thank you for joining us once again. So we have a very special 6 00:00:28,980 --> 00:00:33,680 series to bring you, brought to you by our good friends at Regal Rexnord. Chris 7 00:00:33,680 --> 00:00:38,660 Mahali, how are you sir? Very good, thank you. So we're going to spend four sessions 8 00:00:38,660 --> 00:00:41,860 together. So we're gonna do four different months the first Thursday, the 9 00:00:41,860 --> 00:00:46,300 first show of the month, and we're gonna dive deeper into ECM motors. So this week 10 00:00:46,300 --> 00:00:50,220 we're gonna talk about ECM constant airflow motors. The following month we're 11 00:00:50,220 --> 00:00:54,300 gonna dive a little deeper into ECM constant torque. Then we're gonna go into 12 00:00:54,300 --> 00:00:59,380 ECM condenser motors, and then we're gonna talk about the effects of airflow on all 13 00:00:59,380 --> 00:01:03,420 of the different ECM motors. And you go, well why are we diving into ECM motors? 14 00:01:03,420 --> 00:01:07,300 Well for me personally, it's a great topic to talk about. So when we start 15 00:01:07,300 --> 00:01:10,660 understanding motors in general, and the differences between like permanent 16 00:01:10,660 --> 00:01:16,380 split capacitor motors and DC motors, and ECMs in particularly, it gives us a 17 00:01:16,380 --> 00:01:20,100 better understanding of technology, right? We're spending a lot of time talking 18 00:01:20,100 --> 00:01:24,660 about inverter technology and transitions into new generations of heat pumps. And 19 00:01:24,660 --> 00:01:31,060 if you have a confident understanding of ECM motors, you'll actually have a more 20 00:01:31,060 --> 00:01:35,860 confident understanding of inverter compressors. So Chris, thank you so much 21 00:01:35,860 --> 00:01:41,500 for joining us today, and let's dive a little deeper into ECM motors. All right, 22 00:01:41,500 --> 00:01:46,880 well let's dive into, I consider you one of the motor masters of our industry, one 23 00:01:46,880 --> 00:01:51,300 of the lead technicians and trainers. And I always like to president that, that a 24 00:01:51,300 --> 00:01:54,300 lot of people don't understand that you can be a technician and not be a good 25 00:01:54,300 --> 00:01:57,300 trainer. You could be a trainer and may have never actually been a technician, 26 00:01:57,300 --> 00:02:00,340 but when you have the combination of the two of those, that's when the magic 27 00:02:00,340 --> 00:02:05,900 happens. That's why I enjoy hearing you so much. You can speak the truth about 28 00:02:05,900 --> 00:02:11,740 what we see out in the field. So, yeah, so all right, let's see a little bit more 29 00:02:11,740 --> 00:02:17,340 about constant airflow motors. All right, just an overview of, you know, when we say 30 00:02:17,340 --> 00:02:22,780 constant airflow motors, the industry knows these motors by the term variable 31 00:02:22,780 --> 00:02:26,700 speed. Yes. And I don't like the term variable speed, but that's, you know, once 32 00:02:26,700 --> 00:02:30,540 you get to know me, you know, I have pet peeves just like everybody else, and 33 00:02:30,540 --> 00:02:34,740 variable speed is one of them, because if you take a single speed motor and you 34 00:02:34,740 --> 00:02:38,980 change its load point, its speed changes. So every motor is variable speed if you 35 00:02:38,980 --> 00:02:44,340 go by that definition. Oh, so the reason I like the term that our engineers 36 00:02:44,340 --> 00:02:48,380 gave this motor way back when constant airflow is, if you really just focus on 37 00:02:48,380 --> 00:02:52,660 the words, it's a constant airflow motor, it's kind of like if you focus on the 38 00:02:52,660 --> 00:02:56,780 words cruise control on your car. When I set the cruise control, it maintains 39 00:02:56,780 --> 00:03:01,660 70 miles an hour. When I have a constant airflow motor, I might be maintaining 40 00:03:01,660 --> 00:03:05,540 airflow, and that's exactly what the motor does. So you get a, you kind of get 41 00:03:05,540 --> 00:03:08,820 a better understanding of what the motor does when you think of the, when you, when you 42 00:03:08,820 --> 00:03:13,180 listen to the words constant airflow, constant torque, constant speed. And so 43 00:03:13,180 --> 00:03:16,940 we'll start off with the constant airflow motor in this session, as you said. I do 44 00:03:16,940 --> 00:03:20,620 like to, for just for people that are maybe not as familiar with these motors, 45 00:03:20,620 --> 00:03:25,900 to know why. Being that it is our premium level product, it's typically found in 46 00:03:25,900 --> 00:03:31,020 your premium level HVAC equipment. So your, your two-stage, which, you know, 47 00:03:31,020 --> 00:03:35,460 entered the industry back in the late 80s, same time ECMs entered the industry. 48 00:03:35,460 --> 00:03:43,380 Right. Wait, wait, what? 1980s? Yeah, late, late, late 80s. I may or may not have had a mullet back then. 49 00:03:43,380 --> 00:03:50,900 Oh yeah. I wish I still had some of that hair. So yeah, late 80s with the two-stage, 50 00:03:50,900 --> 00:03:55,220 and then that obviously progressed into three-stage, and now we have modulating, 51 00:03:55,220 --> 00:03:58,660 you know, systems. That's where you're going to find the constant airflow variable 52 00:03:58,660 --> 00:04:04,100 speed motors. Not so much in your single-stage equipment, and not so much in your, not, not 53 00:04:04,100 --> 00:04:10,260 really at all in your, you know, builders grade level, low level equipment. So what, if you don't 54 00:04:10,260 --> 00:04:15,460 sell premium level systems, or you don't work on premium level systems, or a lot of them, you may 55 00:04:15,460 --> 00:04:22,100 not be as familiar with these motors as others. So I'd like to cover that early on. These motors 56 00:04:22,100 --> 00:04:27,300 are also what I like to call communicating, and I like that word because it immediately 57 00:04:27,940 --> 00:04:33,700 says something different than multi-tap. Absolutely it does. You're not going to be moving 58 00:04:33,700 --> 00:04:37,860 wires from one tap to another to change the speed of the motor. You're going to be doing 59 00:04:37,860 --> 00:04:43,460 something else because the motor is actually communicated with information from the OEM 60 00:04:43,460 --> 00:04:50,180 control board to the motor, which dictates how the motor performs. So to change the performance of 61 00:04:50,180 --> 00:04:55,700 the motor, you're going to be adjusting dip switches, or jumper pins, or you know, lately 62 00:04:55,700 --> 00:04:59,860 many manufacturers are moving to the fully communicated system where the thermostat's 63 00:04:59,860 --> 00:05:05,300 communicated and all the menu selections and even fault codes are at the thermostat. Absolutely. 64 00:05:05,300 --> 00:05:09,300 And we've talked about that quite a bit on the communicating systems that we're typically using 65 00:05:09,300 --> 00:05:14,500 a variable five volt DC signal. So it's not like a light switch of 24 volt AC. You know, 66 00:05:14,500 --> 00:05:18,340 like if you think about it like a standard thermostat or a PSC motor or a single or two 67 00:05:18,340 --> 00:05:24,740 stage compressor, we're talking about a switch that applies voltage so that we have a load on 68 00:05:24,740 --> 00:05:28,660 something. When we talk about communicating, now we're talking about variable signals, 69 00:05:28,660 --> 00:05:33,940 just like we're talking about an internet connection, any type of a serial signal where 70 00:05:33,940 --> 00:05:38,980 we use variable inputs and outputs, like all of our inverters are using pressure transducers and 71 00:05:38,980 --> 00:05:43,540 temperature thermistors, typically all from a five volt DC signal, a lot of our communicating 72 00:05:43,540 --> 00:05:49,380 thermostats. And on that five volt DC signal, we teach, well, we're not here to learn how to read 73 00:05:49,380 --> 00:05:54,180 the command that's going through it. We're learning to read that there is a command, 74 00:05:54,180 --> 00:05:59,380 that there is something happening there. And so that same principle applies when we get into ECM 75 00:05:59,380 --> 00:06:03,460 motors. And when we understand that you can look at a motor now and be able to go, hopefully by the 76 00:06:03,460 --> 00:06:08,820 end of this class, you're going to look at that motor and you go, ah, that makes so much sense now. 77 00:06:08,820 --> 00:06:13,940 And yeah, this is a fun topic. Yeah, that's my hope. And actually I'll, you know, 78 00:06:13,940 --> 00:06:18,660 I'll kind of give away the presence early. You know, in my opinion, these motors are actually 79 00:06:18,660 --> 00:06:24,100 easier to work on induction motors, because there's really only a couple of inputs and 80 00:06:24,100 --> 00:06:29,380 outputs to check. And when we get to the point of understanding that an ECM is a motor that's 81 00:06:29,380 --> 00:06:34,260 operated by a control and that control is a circuit board microprocessor or whatever. 82 00:06:35,140 --> 00:06:39,220 And I'm sure you've taught this or had somebody on your show that's taught this, you know, any control 83 00:06:40,340 --> 00:06:45,060 diagnostics is just what's the input, what's the output. And once you, once you understand that, 84 00:06:45,060 --> 00:06:49,940 it becomes real easy. So the last bullet point I did want to mention before we move on is the 85 00:06:49,940 --> 00:06:55,540 constant airflow programming. Each of these motors actually has a constant airflow algorithm 86 00:06:55,540 --> 00:07:02,260 because that algorithm has to understand, uh, airflow in CFM has to understand static pressure 87 00:07:02,260 --> 00:07:06,820 and it has to correlate that to torque and speed in the motor. And we're not going to take a, 88 00:07:06,820 --> 00:07:11,380 we're not going to dive that deep into the motor in this particular show. I mean, we could, 89 00:07:11,380 --> 00:07:16,020 but that would be a whole. No, that was 100 feet would be good. Cause that a way every technician, 90 00:07:16,020 --> 00:07:20,980 every instructor knows, okay, I didn't know much before. So we started here and I got to 91 00:07:20,980 --> 00:07:25,460 here where I understand exactly. I'm not going to be an engineer. I don't need to know the hundred 92 00:07:25,460 --> 00:07:30,740 foot down into the algorithms, but if we wanted to go deeper, let me know in an email, let us know 93 00:07:30,740 --> 00:07:36,100 in the chat, maybe some other episode we'll dive deeper into algorithms and what those inputs look 94 00:07:36,100 --> 00:07:40,340 like to dictate the output. But for the most part, we're talking about troubleshooting and 95 00:07:40,340 --> 00:07:44,980 understanding how these things operate and that we're definitely going to be able to do today. 96 00:07:44,980 --> 00:07:50,580 Yeah. And the main reason I like to bring that bullet point up is so I get asked quite often, 97 00:07:50,580 --> 00:07:56,980 can I take a ECM from a carrier and it's, it looks the same, has the same plugs and put it in a 98 00:07:56,980 --> 00:08:01,940 train. Right. And I've even had people tell me, well, I've done that and it works. So what do you 99 00:08:01,940 --> 00:08:08,980 think about that? Cause cause they'll hear me say, no, you can't, you may be running, but it, 100 00:08:08,980 --> 00:08:14,340 is it running at the right airflow? Because that is demanding or right. Cause that, that might be 101 00:08:14,340 --> 00:08:20,020 like taking the computer chip out of a Chevy and putting it at a Ford. Well, if there were both V8s, 102 00:08:20,020 --> 00:08:24,420 it may, it might fire the system, you know, the motor up, but is it running at the right horsepower 103 00:08:24,420 --> 00:08:29,540 and running at the right oxygen levels and blah, blah, blah. So, so you need to understand that 104 00:08:29,540 --> 00:08:36,020 these motors are actually engineered, not just by us, but also by the end user, which, you know, 105 00:08:36,020 --> 00:08:42,900 my end user is the HVAC manufacturer engineered by them to match the performance of each system that 106 00:08:42,900 --> 00:08:48,580 they go into. And some of those manufacturers have algorithms that work opposing from each other. 107 00:08:48,580 --> 00:08:54,580 So even if something happened to run, when you get a call for G as the, it, the speed is demanded to 108 00:08:54,580 --> 00:08:59,380 increase, the algorithms could actually be calculating the opposite direction and slowing 109 00:08:59,380 --> 00:09:05,380 a motor down. That's a whole nother story. So it's crucial that we're matching the correct 110 00:09:05,380 --> 00:09:11,460 program. And it actually comes down to even model of the furnace because the same model series of 111 00:09:11,460 --> 00:09:18,820 furnace, I need different air flows for a 60,000 up flow and down flow, 80,000. So it's very specific 112 00:09:18,820 --> 00:09:23,620 for the actual controlling to get that airflow. You bet. And you just covered one of my slides 113 00:09:23,620 --> 00:09:33,540 coming up. So they're good. So just to take a little step deeper into what is communicated means 114 00:09:33,540 --> 00:09:39,940 our motors. And so the first motor we ever built, and when I say we, the ECM technology was introduced 115 00:09:39,940 --> 00:09:45,860 by General Electric back in the late eighties, we acquired the 48 frame motor business from General 116 00:09:45,860 --> 00:09:52,980 Electric, including induction and ECM in 2004 ish rebranded it under GenTech. So that's why I keep 117 00:09:52,980 --> 00:09:56,980 saying we, even though it wasn't we, you know, kind of the, what does that say? It's saying the Royal 118 00:09:56,980 --> 00:10:05,220 We's. I don't even know what that saying means. But if you go back to even the early nineties, 119 00:10:05,220 --> 00:10:11,380 all of our constant airflow variable speed motors have two plugs. They've got a line voltage plug 120 00:10:11,380 --> 00:10:17,220 and they've got a communication plug. And actually from the early nineties all the way to today, 121 00:10:17,220 --> 00:10:21,940 there's really only two different motors. There's motors with a five pin line voltage plug 122 00:10:22,580 --> 00:10:28,340 and a 16 pin communication plug. And then you've got motors with a five pin line voltage plug 123 00:10:28,900 --> 00:10:34,180 and a four pin communication plug. And here's, I'll warn you, here's one of my really bad jokes. 124 00:10:34,180 --> 00:10:37,140 You know, what's the difference between the 16 pin motor and the four pin motor? 125 00:10:39,380 --> 00:10:42,260 12 pins. I told you it was going to be bad. I told you. 126 00:10:45,380 --> 00:10:52,100 But the difference in all sincerity is the type of communication. Right. So, and I, 127 00:10:52,740 --> 00:10:57,140 anyone that's been to my class has heard me refer to these motors like printers. I use printer 128 00:10:57,140 --> 00:11:03,940 analogy, computer printer, motor, OEM board. Right. So if anyone that's listening had a 129 00:11:03,940 --> 00:11:10,020 printer 15 years ago, right. You remember that the cable between the computer and the printer was a 130 00:11:10,020 --> 00:11:15,300 very wide cable called the parallel port, I believe. A lot of pins in there, easy to bend them, 131 00:11:15,300 --> 00:11:20,660 not get them in the right place. Right. That was the technology of the time, early nineties, 132 00:11:20,660 --> 00:11:24,900 when those 16 pin motors were designed. Absolutely. And I get asked often, well, 133 00:11:24,900 --> 00:11:29,460 why do you still make them then? I mean, the printers don't use that technology anymore. 134 00:11:29,460 --> 00:11:34,820 Well, we keep making the motor because the manufacturers, they keep asking for it. Right. 135 00:11:34,820 --> 00:11:41,300 Absolutely. But we did introduce the four pin motor, which is akin to a USB port. If you ever 136 00:11:41,300 --> 00:11:45,700 look at a, and I think I might have one here, if you ever look at one of your USB plugins, 137 00:11:45,700 --> 00:11:50,420 I know you can't see that, but if you look at your USB plugin inside, there are four pins. 138 00:11:50,420 --> 00:12:00,180 And those four pins are communicate, transmit, power and common. So when you want to communicate 139 00:12:00,180 --> 00:12:05,060 with something, you really only need two wires. So for the OEM board to talk to the motor, 140 00:12:05,060 --> 00:12:09,460 I only need two wires to come in and send information to the motor. But if I want the 141 00:12:09,460 --> 00:12:15,540 motor to provide communication back, you know, I'm running, I'm here, I'm running, then I need a 142 00:12:15,540 --> 00:12:20,580 transmit channel back. So that's how the current four pin motor works. So when you look at the 143 00:12:20,580 --> 00:12:24,900 four pin motor, you know, again, trying to make things simpler in your mind, not those big scary 144 00:12:24,900 --> 00:12:31,380 ECMs, just think about a motor with a five pin plug and a USB port. Cause that's really all that 145 00:12:31,380 --> 00:12:37,140 four pin plug is. Yeah, absolutely. Well, and like when we talk about things like pressure transducers 146 00:12:37,140 --> 00:12:41,380 on a inverter system, or even your pressure transducer that is on your digital manifold 147 00:12:41,380 --> 00:12:48,340 gauges, you know, we've got a hot, we got a common, and then we have a variable coming back. So when 148 00:12:48,340 --> 00:12:51,620 we start getting into serial communications, that's typically what we're talking about is 149 00:12:51,620 --> 00:12:55,700 we're talking about supplying a constant and returning some kind of a variable so that we 150 00:12:55,700 --> 00:13:01,540 can talk both ways. Sometimes we have the extra where we can variable forward and variable backward. 151 00:13:01,540 --> 00:13:07,060 We're just talking back and forth on a simple wired connection. Yes, sir. And a little later, 152 00:13:07,060 --> 00:13:10,980 we'll talk about what some of those voltages are, because obviously you're not going to have an 153 00:13:10,980 --> 00:13:16,100 oscilloscope or a device that can actually read that binary code, but you can measure most of 154 00:13:16,100 --> 00:13:22,260 that communication with either AC or DC voltage settings on your meter. Nice. All right. Yeah. 155 00:13:23,140 --> 00:13:27,700 So, so what does the communication do? The communication is the on off command for the 156 00:13:27,700 --> 00:13:33,700 motor. The line voltage to an ECM is connected continuously. Yeah. And we do that on purpose. 157 00:13:33,700 --> 00:13:38,180 And I, I didn't take my motor apart, but I'll, I'll do it while I'm talking. Do you have one 158 00:13:38,180 --> 00:13:42,020 taken apart? Yeah, absolutely. Let's say Daniel will throw that camera. You got the control off 159 00:13:42,020 --> 00:13:45,540 already? Yeah. No, but I'll do that. No, no, you got one right there, right there next to you. 160 00:13:45,540 --> 00:13:50,820 You got a control. Yeah. So if you look at that control that's next to you there, um, inside, 161 00:13:50,820 --> 00:13:54,580 you're going to see, um, some little capacitors. Look at those cute little guys. Aren't they 162 00:13:54,580 --> 00:13:59,860 adorable? Uh, those capacitors are about a thousand microfarads a piece. Um, so they, 163 00:13:59,860 --> 00:14:05,860 they carry a punch. So the reason I bring this up is I get asked all the time, why is the motor 164 00:14:05,860 --> 00:14:10,180 continuously powered? Why not switch the line voltage on and off instead of switching the 165 00:14:10,180 --> 00:14:14,900 communication? Sure. And it's because of those capacitors. Every time the line voltage is turned 166 00:14:14,900 --> 00:14:19,220 off, the caps discharge, discharge it, take every time you turn the motor back on, they have to 167 00:14:19,220 --> 00:14:25,300 fully charge and they draw a significant inrush of power, uh, to do that. So we leave, and that 168 00:14:25,300 --> 00:14:31,300 would cause the manufacturer's circuit board to have a more robust relay. If we were to be turning 169 00:14:31,300 --> 00:14:36,660 that line voltage on and off, controlling that load, I didn't rush load. Yeah. Exactly. So we 170 00:14:36,660 --> 00:14:41,860 leave the motor powered all the time and, and again, uh, relating it to something like the printer 171 00:14:41,860 --> 00:14:46,420 or even your home stereo or, I mean, do you unplug your microwave when you're done working it? 172 00:14:47,460 --> 00:14:52,500 No, it's energized all the time. You press the on off button and that sends the command to the devices to 173 00:14:53,060 --> 00:14:57,780 turn on and off. So that's why we, uh, that's why we do it that way. And the communication controls 174 00:14:57,780 --> 00:15:03,380 that. Um, but it also controls the, the communication also controls the airflow. 175 00:15:03,380 --> 00:15:08,660 The motor is going to operate it. So if the dip switches, uh, you can see the square around the 176 00:15:08,660 --> 00:15:13,540 circuit board on the screen, if the dip switches are not set correctly, even the motor turns out, 177 00:15:13,540 --> 00:15:17,780 even though the motor might turn on, it might not be producing the right airflow. And the only way 178 00:15:17,780 --> 00:15:24,420 to adjust that is to change the communication coming to the motor. Right. Because, uh, and I get, 179 00:15:24,420 --> 00:15:28,740 I have been asked, well, so what if I take the wires out of the 16 pin and move them around? 180 00:15:28,740 --> 00:15:33,380 Um, well, usually that's going to cause the motor to not run because you've rearranged the 181 00:15:33,380 --> 00:15:38,340 communication and it's not going to like that. Um, so it's, it's not a tapped motor. You're not 182 00:15:38,340 --> 00:15:42,340 going to change speeds by adjusting the wires. Exactly. You're going to adjust the dip switches 183 00:15:42,340 --> 00:15:46,660 on that board on the screen, which is going to change the communication coming to the motor. 184 00:15:46,660 --> 00:15:50,740 Sure. It's going to change the voltage or the pulse width modulation of that voltage so that 185 00:15:50,740 --> 00:15:55,220 it gets an idea what the command is or the serial communication. If we're talking about the four pin 186 00:15:55,220 --> 00:15:59,540 motor. Exactly. Yep. The last bullet point I did want to touch and where I think we're going to 187 00:15:59,540 --> 00:16:04,500 get it on the next page as well, but you are going to need the OEM manuals to adjust airflow. 188 00:16:04,500 --> 00:16:10,340 Unlike popular belief, uh, the, you know, HVAC systems don't come from the manufacturer perfectly 189 00:16:10,340 --> 00:16:15,140 set up for everyone. They're going to go into. Yeah, I know it's a surprise. They're, they're 190 00:16:15,140 --> 00:16:20,260 a drop and go package, aren't they? Plug and play, right? You just plug them in and they play. 191 00:16:20,260 --> 00:16:24,980 These things are so smart. I don't have to do anything. I just, these new variable technologies 192 00:16:24,980 --> 00:16:28,980 and communicating thermostats, I just hook them up and go. You know, they are getting smarter, 193 00:16:28,980 --> 00:16:34,100 especially the ones with communicating thermostats. They, the thermostat can talk to the outdoor unit 194 00:16:34,100 --> 00:16:39,300 and actually set that airflow. Yeah. Uh, but you, you will need the manual for some of the settings. 195 00:16:39,300 --> 00:16:43,540 I carried books and reference and books to have the manuals today. You know, you're going to get 196 00:16:43,540 --> 00:16:48,180 them all on your phone. You're going to Google a model number and probably find it, but, um, 197 00:16:48,180 --> 00:16:53,780 become that technician. Sorry to take a segue here. No, no, absolutely. Um, please become that 198 00:16:53,780 --> 00:16:58,820 technician that on every job pulls up the manual and checks to see if the system has ever been set 199 00:16:58,820 --> 00:17:04,980 up properly, uh, and measures the airflow. You will just be amazed at how much better systems will run, 200 00:17:04,980 --> 00:17:10,660 how many fewer repairs you have customers that'll tell you, I never knew the air coming out of that 201 00:17:10,660 --> 00:17:14,420 furnace could be warm. I thought it was always out, you know, it's, it's a high efficiency. They 202 00:17:14,420 --> 00:17:20,500 told me it would be cold with one dip switch setting all of a sudden, Hey, yeah, that feels good. So 203 00:17:20,500 --> 00:17:25,540 there, there's my, there's my punch for the industry. No, absolutely. I seen it so much when 204 00:17:25,540 --> 00:17:30,420 I was doing technical support calls that, you know, I would do site visits. You know, first the call 205 00:17:30,420 --> 00:17:34,020 is all right, let's verify that we got proper airflow. Oh yeah. Yeah. I got proper airflow. 206 00:17:34,020 --> 00:17:39,300 And the most common call that I had on my constant airflow motors is that they were tripping out on 207 00:17:39,300 --> 00:17:46,020 blower fault codes. And the beauty of the communicating system is that it can send a signal back to 208 00:17:46,020 --> 00:17:51,700 the control board when it senses high temperatures and where do those high temperatures come from? 209 00:17:51,700 --> 00:17:57,620 Well, they come from excessive load on the motor and it is almost every time I would find excessive 210 00:17:57,620 --> 00:18:03,220 static pressures. And we'll dive into that later on, probably episode four, when we get into 211 00:18:03,220 --> 00:18:09,060 how airflow affects them. But we always have to remember that a motor is a motor and excessive 212 00:18:09,060 --> 00:18:13,940 pressures are always going to have negative consequences. So they can fix themselves a 213 00:18:13,940 --> 00:18:19,460 little bit. They can tweak, but they definitely can't fix bad habits. Yep. And we will touch on 214 00:18:19,460 --> 00:18:22,980 that just a little bit here for those of you that are going, ah, I was really hoping they'd talk 215 00:18:22,980 --> 00:18:27,700 about that today. We will talk about it a little bit. Oh, you got to come back for more. That's 216 00:18:27,700 --> 00:18:31,940 all your friends too. We'll tease them. Yeah. That's right. So, uh, you know, a big part of the 217 00:18:31,940 --> 00:18:36,900 setup is simply the cooling and heating airflow. Those have to be set correctly. Beyond that, 218 00:18:36,900 --> 00:18:43,380 everything else is creature comfort. But these systems truly do have some pretty amazing creature 219 00:18:43,380 --> 00:18:48,100 comfort abilities now and not just comfort, but even, you know, if you, I live in Wisconsin, 220 00:18:48,100 --> 00:18:53,220 right? High humidity for us is when the windshields are wet in the morning and we freak out because 221 00:18:53,220 --> 00:18:59,540 the dew points are high. And, you know, for those of you in Louisiana or other humid markets, you 222 00:18:59,540 --> 00:19:03,860 just laugh at us because, you know, that's your wintertime conditions, right? My peak summer. 223 00:19:03,860 --> 00:19:08,420 But, you know, there are truly some amazing features on these new systems that can adjust the, 224 00:19:08,420 --> 00:19:14,900 um, not only the amount of air, but the, um, the, the, uh, time that the airflow runs at certain 225 00:19:14,900 --> 00:19:21,780 levels to get more latent versus sensible removal out of the coil, uh, during a typical cooling call. 226 00:19:21,780 --> 00:19:26,580 So besides the fact you can have first stage, second stage, you can also then have a first stage 227 00:19:26,580 --> 00:19:31,780 and second stage that are running at part airflow for a certain amount of time and get more latent 228 00:19:31,780 --> 00:19:37,220 removal. And then, you know, of course, because the manufacturer has engineered all this in, 229 00:19:37,220 --> 00:19:41,220 you can get all that without having to worry about freezing the coil by just, you know, dropping a 230 00:19:41,220 --> 00:19:45,860 speed. And so those are all the other functions there. Um, some of, some of them are simple 231 00:19:45,860 --> 00:19:50,900 selections where you say, Hey, I want more dehumidification, or some of them are, uh, more 232 00:19:50,900 --> 00:19:55,380 sophisticated where you can pick a profile that matches your market. And some of them are even, 233 00:19:55,380 --> 00:20:02,500 um, more sophisticated where the unit will look at the humidist that or humidity sensor in the 234 00:20:02,500 --> 00:20:08,340 thermostat on the wall. And it will gauge whether it needs to go into dehum mode by what's actually 235 00:20:08,340 --> 00:20:13,060 happening to the conditions in the home. That's a whole nother topic. That could be a fifth 236 00:20:13,060 --> 00:20:18,340 conversation right there. Cause I can preach all day long on proper airflow for dehumidification, 237 00:20:18,340 --> 00:20:23,220 especially when it comes to inverter operations. So we need to bring in Rick Kinsel for that one. 238 00:20:23,220 --> 00:20:28,660 So he's the expert on that. But yeah, but, you know, so the thing to keep in mind is it's not, 239 00:20:29,220 --> 00:20:33,300 the cooling and heating airflow are not always going to be properly set up for every job the 240 00:20:33,300 --> 00:20:37,780 unit goes into, but all of those other settings, the creature comforts and the dehumidification, 241 00:20:37,780 --> 00:20:43,860 they're going to be set at a default setting for, you know, for general USA, not for, you know, 242 00:20:43,860 --> 00:20:49,060 Fargo, North Dakota compared to Miami, Miami, Florida, which is, which are going to be drastically 243 00:20:49,060 --> 00:20:53,380 different climates. So you'd have to go in and, and adjust those. And my, you know, my, my, my, 244 00:20:53,380 --> 00:20:58,660 my plug as a former technician, maintenance technician, service technician is, you know, 245 00:20:58,660 --> 00:21:03,060 this customer paid for a premium level system. They're not getting a premium level system. 246 00:21:03,060 --> 00:21:07,220 If we don't set it up properly, any, and each job is different. I mean, even here in Wisconsin, 247 00:21:07,220 --> 00:21:12,180 I would set up systems for maximum dehumidification. Why in Wisconsin? Well, 248 00:21:12,180 --> 00:21:16,260 I've got a family that never opens the windows. You know, they're asthmatic, whatever the windows 249 00:21:16,260 --> 00:21:20,420 are always going to be closed. What they're looking for multiple people living in the house. Maybe 250 00:21:20,420 --> 00:21:23,780 they're, and, and I hope I don't get in trouble for this. Maybe they're Italian and they cook a 251 00:21:23,780 --> 00:21:29,140 lot. Right. No, it makes sense. So, you know, there's going to be a lot of moisture in the house 252 00:21:29,140 --> 00:21:33,300 and a lot of showers in that house. And I want to get that humidity out of the house. So there, 253 00:21:33,300 --> 00:21:39,620 there are reasons to set those settings, not only based on re region, but also by the design 254 00:21:39,620 --> 00:21:43,780 preferences. Yeah. All right, everyone. Well, thank you so much for joining episode one of a 255 00:21:43,780 --> 00:21:48,660 four-part series next month. We're going to be diving into constant torque motors. You're going 256 00:21:48,660 --> 00:21:51,780 to go, wait a minute, didn't we just talk about ECM? So we'll go, no, we're going to talk about 257 00:21:51,780 --> 00:21:56,420 their cousins, the constant torque versions of those. Yes, we are. All right. Well, thank you 258 00:21:56,420 --> 00:22:01,620 so much, Mr. Mahali. And we look forward to seeing all of you again next week on, did you know the 259 00:22:01,620 --> 00:22:05,700 Esco HVAC show? Tell all of your friends about the great stuff that we're doing over here. 260 00:22:05,700 --> 00:22:11,220 Subscribe to the channel, turn on notifications. Now you can join us for these live conversations 261 00:22:11,220 --> 00:22:16,820 with the coolest educators you've ever met in your life. I've never been called that, but thank you. 262 00:22:16,820 --> 00:22:38,980 Absolutely. All right. Bye everybody.