Відео

As a small contractor in the Dallas area that replace propbably 25 evaporators a year, i have never had to replace an outdoor coil and never ran into a leak outdoor from corrosion. All my leaks are from copper evaporator coils that leaks where the copper U-bend gets in contact with the metal plate before the fins. In some case the coils only last 2 years, all residential, different brands, different systems (a lot of geothermal hp and a lot of slim ducts mini split). All the unitary units I install have aluminum coils and are problem free. I'm at the point where i'm looking at spraying some type of sealant to protect the copper coils from corrosion. Not sure what else is out there. I know i'd lose efficiency but homeowners rather have a lower efficient system that no AC when it's a 105F and having to pay hundred of $ to replace a 2 year old coil. Any advise/ideas are welcome. Going to the same houses every 2 years for the same leaky coil feels like Groundhog day. It's by far the most frustrating part of the business.

If we are willing to adopt refrigerants that are sufficiently flammable to require the additional cost and complexity of mitigation against fire and explosion, maybe we should go all the way and just switch to R-290 for residential comfort cooling. R-290 has some compelling benefits, including being dirt cheap and being so environmentally friendly with a GWP of 3 that it can be legally vented to the atmosphere. Given that refrigerant charging and recovery (or venting if desired with R-290) takes place outdoors, taking the necessary safety precautions when installing or working on such equipment would be relatively easy.

Where would you insert the probes if you installed a heat pump air handler, with the system being a horizontal left, the coil being on the right and the blower on the left side?

Thanks. As an HVAC instructor who teaches A2L I picked up a few additional bits of information requiring me to investigate what I just learned so I can go to a deeper level. Good podcast/video.

Where is your location

My question is, if you open all the damper/vent and achieve 0.50 wc and the furnace is running optimally, but one day granny closes some vents cause she is cold and it ramps up the static pressure to 0.80 wc, wont that damage the blower motor? Is it better to set static pressure at lets say 70% of max to allow for variances? I thought I heard it in another video, but has only come up once that I know of. Thx

I got some esco prep course and it has been no help. I actually forgot that I was told not to do that and that if those of us in our class go that route to speak to our teacher first. To avoid problems. The one I got won't allow me to use any of the stuff I bought until I watch hours worth of stuff I don't need. I don't understand why the product was made that way. I just wanted some stuff to make certain I pass my EPA exam. I'm 90%+ sure I pass core and type one and about 80% on type 2 and about 70% or better on type 3 but I would wish I were above 90 all the way down the line. It's too late to help me, my test is today. But, you guys could improve it for future technicians. I'm doing the test through you guys today.

Nicely done, guys and gals, thanks!

Very very good

Where its location im from algeria how can i register please

Inverters are really nothing new. It's been in the heavy commercial and industrial sector for decades now....its only because it's crept into residential market that it's being talked about....

Nicely shown with bulbs which I never seen before. Thank you ♥️🙏👏

We would like to extend my deepest gratitude for the ongoing partnership between Fujitsu and HVAC Excellence. It appears that our missions are closely aligned, both dedicated to enhancing technical competency and innovation within the HVACR industry. At HVAC Excellence, we are committed to evaluating HVACR educational programs to ensure they meet established standards, credentialing instructors to verify their retained knowledge, and validating students' proficiency through Employment Ready Certifications. These efforts are critical in maintaining high standards of technical expertise in our industry. We are currently witnessing unprecedented changes within the HVACR sector driven by technological innovations aimed at improving system efficiency and addressing environmental sustainability. To thrive in this era of rapid transformation, embracing change is not just an option, it's a necessity. Understanding that Fujitsu is at the forefront of these innovations, we believe it is crucial to collaborate to advance our educational programs. However, we also recognize the challenges ahead. Instructors often lack knowledge of new and innovative systems, necessitating comprehensive education. Once these concepts are understood, they will require robust training resources to integrate this technology into their programs effectively. While we continually express our gratitude to Mr. Grunstra, we want to ensure that all of you at Fujitsu know how much we value and appreciate our partnership. Your support and collaboration are instrumental in driving the progress of our shared mission. We look forward to continuing our successful collaboration in the future. Thank you once again for your commitment to advancing the HVACR industry.

You guys are awesome…got my universal today…the 608 book you offer is excellent. The staff over there is amazing. Seth has helped me tremendously on a few occasions. Will be coming back shortly to get an A2L cert.

👍

24v c is reference to ground

I have installed many of your heat pumps with convential systems and Unico high velocity, why is it when they start up in AC mode they always come on in heat mode, I talked to your tech at Bosch and all they said is that's how they work , when all other brands don't do this, can someone tell me a detailed explanation for this ty Tony

AS FOR I KNOW EVERY MOTOR NEED A CERTAIN ABOUT AMPS TO START THE MOTOR . AND IF A MOTOR IS STROGGINS TO DRAW THOSE AMP TO GET IT STARTED IT WILL EVENTUALLY BURN OUT THE MOTOR. EVEN IT SLOWLY GETS THODE AMP. SO WHAT DO U THINK ABOUT THIS.

What would happen in a scenario where the blower motor fails to come on and the system keeps leaking in evaporator. Can this cause refrigerant to ignite.

Why is there loud music when we want to hear whats going on??????

ok i am confused. you said "to point it in the direction of the air flow" its an up flow unit. shouldn't the tip point up? please clarify. thank you.

do you sell that book?

Thanks for the video. You mentioned the gas furnace will shut off when refrigerant is detected. The schematics I have show only the 24 volt (Y) circuit to the outdoor unit is interrupted. What model sensor are you demonstrating and is there a schematic available?

While some refrigerant detection systems may detect multiple refrigerants, not all will do so, and even if capable of detecting more than one refrigerant the response time may not be the same. If needing to replace a failed refrigerant detection system (or sensor) follow the manufacturer instructions to ensure use of an acceptable make and model that will function as intended.

Very well said, gentlemen. Mitsu guy here - 12-24dc fluctuating on S2/S3. Outdoor sends 24vdc, indoor responds with 12vdc. That’s how you troubleshoot. Also, fun fact although I’m not sure if it’s true, but they are able to share the S2 wire because AC travels on the outside of the line and DC travels in the middle.

An important point was missed. The GWP effect is when there is a LEAK! not while it's in the system. When & IF it leaks when there is a fire, it will propagate the fire!!! Also, very important flammable A2L (R32 or R454B) might and could INTERNALY explode. This is true if the vacuum process (must be higher than R410A an A1 class non-flammable, non-explosive class) is not perfect (presence of moisture/oxygen) as when compressed the temperature could reach the lubricating OIL ignition temperature, and in the presence of flammable refrigerant (any A2, A2L or worse A3) the oil might ignite the flammable refrigerants! This possibility will not exist if A1 class non-flammable refrigerants are present. Neil Afram Director of Space Air Ltd. distributor of AC & Heat Pumps since 1980.

It would be great if we could tie all the refrigerant flows of all the units in a building to maximize efficiency. For example, connecting the refrigerator to the heat pump water heater, and the heat pump dryer with the HVAC heat pump.

** It is my understanding the Yellow Can Blow Off is actually R-1234ze per the MSDA Sheet. Did someone misspeak?

Great review! I’m a certified tech support and instructor for Mitsubishi(Yeah, Juan’s TTT class was super fun…), Fujitsu, York, Ruud, and Bosch. Also, recently became a proctor for Esco’s EPA. Mitsubishi hands down has best training out of all those. It’s a lot, especially if you do both M&P and City Multi(including controls), but you will be very confident after you take the classes and start applying your knowledge. I’ve always loved Esco, and I think Esco+METUS would be a great partnership. PS - if you can’t get into a classroom for training, listen to every METUS Tech Show podcast and you’ll receive abou the same amount of knowledge.

Please investigate indoor A2L R32 gas leakage fire blast reason in pakistan . Three to fiur cases are recently happened in asia pakistan

Chuck “Cliffhanger” Allgood

Anybody here from the cliffhanger video?😂😂

Oh ok

Great information here! Thank you guys.

Clifton, What is your source for the dusters? Everything I see is R152 based. Thank you.

Clifton and Tom, Thank you very much for creating this video. It shows HVACR professionals how a typical RDS will work, giving educators and trainers a great tool for the classroom.

Always great video's Clifton

Great job guys. Keep up the great work.

Excuse me , Can I take an EPA certification without SSN ? I'm a new immigrant

R-1234YF? and R-454B? Are we running out of numbers?!

Bro, you chewed the hell out of that sheet metal. Couldn't you just loosen the screws for the lid, install the box, and then screw the lid back in? ua-cam.com/video/I18b5ViTdxo/v-deo.html

Does anyone know what size orifice piston sizes for 32?

This was needed. Thank you team. We often get focused on the winnings till we forget or neglect our health which is our personal wealth

Great job guys!!!

How I can get started on all my certification courses exams EPA core-1‐universal And H2L

Thanks for doing this, you're a great teacher.

It would be nice if the manufacturers would agree on communications protocols. For those who might wish to delve further into how to create a list of those protocols for the IR remotes, you could consider programming an arduino to read the signals from different remotes and creating a chart showing what each button does for each manufacturer, then converting that signal using the arduino programming. This would, of course, be an exercise for those who wish to understand this better. This link explains this process and also how a person could easily use their phone to see the IR light coming out of your remote if you don't happen to have an IR scope. ua-cam.com/video/8E3ltjnbV0c/v-deo.html Now if we could just get those manufacturers on board so that the technician could see the signal with the oscilloscope then verify that the PWM is correct rather than just seeing if it is there.

Does this soft start unit work on a Lennox 4 ton 2 stage compressor? I don’t see ny 2 stage compressor mentions.

Great video guys. Good information.