@@cliffanderson7544 I just serviced one from 1975. Someone cut the blower cap out and it has been running without a cap for I don’t know how long. The condensing unit is from 1995. Still chugging along.
Industrial generator tech here/ I have to say I enjoy your teaching style. I do not work in this field but your teaching style makes me want to listen. Be
In 1979 at the tender age of 19 I went to Frigerator College. Ended up being a welding and rigging contractor for 30 yrs, but I can tell you all my ACs work perfectly and all of my vehicles are as cool as the other side of the pillow including my 64 Econoline (dual evaps) and my 32 coupe. AC has been good to me.
A friend of mine is a chemical engineer that lived through 40 years of these changes. He said it is NOT for the environment and never was. Twisted data on the effects of these chemicals was done deliberately. He said these changes keep the industry selling new equipment and the chemical companies like the one he was in management for, making new product.... He was very high up in a company you all would recognize. Our government is not what you think it is.
BINGO. Back when the Ozone problem was invented, R12 cost $1/lb in retail consumer sales. The stuff was used, as an example, for BB "machine guns" and to chill glassware for mixed drinks and so advertised on TV. Why so cheap? Off patent. Funny thing, the replacements were only manufactured when the maker paid a license fee.
@@footiefan51 In the the 30 years I've been running my R22 unit, a typical newer system would've been replaced 3 or 4 times. How could the manufacture and disposal of all those POSSIBLY be better for the environment? "Efficiency?" If the new stuff is so much more efficient, how come 15,000BTU is still the max for a 15A circuit? You could get a 15K BTU window A/C that drew 13A in 1985. You'd think we'd at least be up to 18K BTU by now??
Ozone problem wasn't invented. A kind reminder that the CFC's were patented things that drove up the cost compared to the older non-patented refrigerants of the 30's like sulphur dioxide or.. r290. They banned those in favor of CFC's because they were safer - according to DuPont's lawyers. Anything they can patent and do. 1234yf is the new patented expensive stuff. R290 or R600a at least isn't patented and I think R32 is also out of patent. @@GilmerJohn
The two teachers taught well as usual.The class was interesting to learn from.The best class to teach with no mental health distractions with skybox proofreading.#GreatJob!
Chevron chevron is going to be overturned in our lifetimes. It's definitely on the chopping block. At least 3 justices are vehemently opposed to Chevron, and a couple more have significant concerns about its 'as applied" constitutionality.
32:03 We used nail plates on wooden studs where NM cable is run in the wall closer than 2 3/4” to the wallboard (I think that’s even in chapter 70 of the NFPA code). We affectionately called them kickplates. But that was years ago, now.
Im in SC and work on appliances and have R600 in my hot van and never had it explode. I just cut both ends on either side on refrigerators when working on the sealed system (filter drier and low side process stub). Only thing that happened so far is at the compressor after cutting open the system I'll get a flame out. Just like a lighter flame.
10:46 cuba did this at a national level during the r22 phasedown. They had some issues when instructions weren't followed. R290 is starting to make a comeback in some appliances.
32:09 - I think it's called a nail plate in the Code; but, it is affectionately known as a "kickplate" in the electrical trade. We use them on wood studs with NM cable running closer than 2 - 3/4" to the rough wall.
I've spent the last couple of years doing commercial almost exclusively and only heard a little about this changeover, so was very nervous, but this video is very helpful. Thanks so much for great information and presentation, as always.
Just an update, I'm taking a certification class for it through my union local and I feel way, way better about all this. I'm not sweating this at all.
Great presentation…. Very in-depth knowledge of materials and actual repair/installation experience is very obvious and makes the training very understandable and relative….. Bob
Let's hope so. Common sense should prevail to keep costs low for consumers, such as removing the leak repair requirements. None of these refrigerants are an issue with the environment, they are all about selling products covered by patents for maximum profit.
Unfortunately I I think it would be too late to go back . All of the manufacturers all of the supply houses everyone is basically converted over to manufacturing and selling these new refrigerants. Except for the contractors who actually have to deal with this crap . All these extra sensors and Manufacturing lines and all this extra crap that we need is going to raise the cost of a residential system 30% at least. These big shops are going to start charging $50,000 for these freaking systems
The part about not unsweating anything and to cut it out because of residual refrigerant in the lineset. Does this apply for example if I am changing a filter dryer, compressor or evap coil and I have the system recovered and shraders pulled and have nitrogen flowing? I would thing the nitrogen would have pushed any residual refrigerant out including displaced the oxygen to keep anything from igniting.
Did after market automotive A/C yrs back and moved on to other things, so I did have my certificate for refrigerant handling etc,.. in the early 90's when 134a was fairly new to replace r12,there was a gas from a Chinese chemist called GU 2015. it was MORE efficient than 12 and was non cfc gas. Magic stuff. But 134 seemed to be the biggest thing on the market and Dow AND Dupont were cornering that market. We did buy some 2015 and used it for retrofits and customers were really happy with it. It was a straight replacement for 12. I heard of some shops replacing 12 with propane and I thought how crazy is that ?? Flammable refrigerant?? I bought a small window ac unit for my apt, and IT has flammable refrigerant. Crazy
Great crucial information explained very well. Thanks for your research and sharing this to help with the upcoming changes. This info is limited and we know we have a great deal of trial and error coming with these changes so this helps tremendously. Thank you
You release any moisture in the drier when you heat it up and technicians start trying to remove it before it's hot enough and it's not good for the tubing
Packaged system (no line set), 12 feet away from combustibles, solar powered, can only be installed and serviced by those who are EPA608+A3++A2L certified who are also members of the local union authorized to perform such work, used to chill water (special water subject to a special tax), that can then be piped into an air handler (also only solar powered), which provides you to be compliant with upcoming 2026 cooling regulations …
5:33 in Canada we've had to repair all leaks for a very long time, along with recovery (and the associated logging) I've honestly lost count on the number of refrigerants I've worked with. This phase down won't change much for me.
They could add a pump down solenoid on the condenser liquid line. Leak sensor sends signal to air handler board, board sends 24v signal with extra wire to condenser. Solenoid closes and pumps down condenser. Compressor shuts off on low pressure switch. Only added 1 extra part and ran extra wire to condenser which usually there is spare wires already ran with the thermostat wire This will also prevent the whole loss of the refrigerant in the house. Refrigerant will be trapped between the compressor reed valves and the liquid line. Will only loose what is in the evaporator and suction line
Can we sue epa for all the different refrigerants we breathed in. I got r12 22 410a 134 407c in my lungs every time I disconnect my gauges. My lungs are running on mixed refrigerants. Thanks Epa
What are you breathing when you are soldering and the refrigerant is In the atmosphere and flame burns the refrigerant and creates a gas that is very bad for you to inhale
Here is some scientific information that should be taught: A2L laboratory testing was not within the stoichiometric combustion range of the A2L Gas. This gas is combustable in concentrations of less than 13% at room temperature and normal atmospheric pressures. See the MSDS: "Flammable gases, Category 1 Gases, which at 20°C (68°F) and a standard pressure of 101.3 kPa (14.7 psi): (a) are ignitable when in a mixture of 13% or less by volume in air; or (b) have a flammable range with air of at least 12 percentage points regardless of the lower flammable limit.
Question on the RDS it is located within the equipment it was mentioned that when refrigerant is detected the fan will energize, and the cooling mode will de energize. Do you know if there is a visible or audible alarm just to let the occupants know or the blower will just continue to circulate the leakage through the ductwork.
The instructor says that r-454 b is a , " mildly " flammable refrigerant, although the msds says that r-454 b is an extremely flammable refrigerant and that the gas can be explosive when it's concentrated in an enclosed space.
Does R22 or 410A produce phosgene gas if exposed to a torch, during a compressor "unsweating" for example? Keep getting mixed opinions out there. Thank you for such informative videos, keep up the great work!
To Fully Protect the OZONE LAYERS in the atmospheric..... ALL Nations and All industries must Comply with the EPA....... NOT just AC manufacturers/ AC Techs 👍👏
What happens if mitigation sensor fails or blower fails will the concentrated leak in the evaporator coil become dangerous. Is there an audible alarm in this situation.
You made a comment in the video about leak repair requirements coming in Oct 2024 on systems with 15-50 lbs of refrigerant in them, do you have a link to more info on this subject ?
in my 60's i always took pictures of my work goldsmith / master jeweler 57 yrs experience photovoltaic / solar thermal technician (not NABCEP certified) not necessary for me DIYer in other fields classic cars etc. love doing the work myself, yes i'm a cheap bastard *enjoyed watching this video in it's entirety*
Just to replace AC in the future in a customers house with your brand. You may have to carry 3 different gauges. 3 different recovery bottles. 3 different vacuum pumps. 3 different recovery machines. That at least $6000.00 per truck just for AC just to work on any equipment.
Has anybody noticed a lot of 5 to 10 year old evap coils that are leaking. Especially the aluminum coils. Are they going to start building the equipment better?
higher pressure refrigerant (r410/R32) reducing equipment life and then race to the bottom on price means manufacturers compromising on copper quality.
@@mikafoxx2717 Thats the biggest crock in HVAC history. They are not making micro channel for efficiency. Micro channels use less metal to make For the so called carbon foot print crap.
It does seem like the most demanding industrial refrigeration settings tend to use flammable/hydrocarbon refrigerants... i think Dupont played up the dangers to get generations of Americans terrified of it so they could sell their proprietary, worse-performing HFC/FC refrigerants.
Anyone that's not afraid of propane, to a reasonable extent, doesn't respect that it can absolutely do major harm. Not respecting that fact can lead to carelessness and a higher probability of a catastrophic event. I'm not saying no one should work with it but we should all give it the respect that it demands because it can 100% result in death and property damage. Everyone should have a certain amount of fear to preserve the respect it requires.
Ozone depletion happens for the next couple decades due to the chlorine, global warming potential is how many times worse than CO2 it is for warming the atmosphere, but doesn't destroy the ozone layer which protects us from skin cancer etc. r410a is something like 2,200x worse than CO2 when it gets into the atmosphere but no Ozone depletion like R12 (worst) or R22.
My dryers are flare dryers and the reason why it is is it's much easier to uncrack a nut. If you worry about the leaks on the flare, put loctite Why they don't do the same on the compressor except the discharge line
If the insides of my vents are sweating, that air space is already sealed and dehumidified. The entire system is in the crawls space (4 ft high cinder block walls, mostly closed with several vent openings). Should I encapsulatr the crawl space and run a small window AC during summer to cool that air slightly? I'm in North Alabama, very muggy and hot.
encapsulate and dehumidify Your crawl space has high humidity issues. And if your ducts are sweating on the inside. your air is moving too slow and colder. Do you have a 2 stage system or an invertor?
@@smacleod69 Nope, single stage. Trane XR14 2.5 ton. Split unit, handler is in middle of house in crawl space, compressor outside. All ducting is in crawl space. It was installed 2 years ago, replacing the original heat pump from when the house was built only 16 years ago. The ducting was in good condition so we just used that. On closer look, I don't see the vents sweating, no sign of moisture on any of the vents or duct interior and it's 90 degrees outside, while I keep the inside 69. I may have been incorrect about the sweating, the service man said there was moisture getting in the system somehow because of the signs we were seeing. While some of the registers still look brand new, a few have rust spotting on the inside surfaces and those also have heavier dust buildup inside the ducts. One of them is so bad the register is nearly engulfed in rust and the inside of the galvanized duct is getting rust spots. How could some look brand new while the others are rusting? If it's not sweating from cold air on warm surface, what could it be?
@@4wardnthought234 69 degrees? Thats one problem. When your new system was installed, did you keep the original duct system? And if so, were the boots sealed inside with duct sealant? Are the boots insulated up to the floor in the crawl space. You can use spray foam around the boots to seal.
@@smacleod69 Why would 69 be a problem? Don't worry about what temp people like in their house, that's not your concern. Tell them how to get the air quality they want. My followup reply answers 2 of your questions - we kept the original ducts and they are sealed from end to end with ¾ or 1 inch thick fiber type insulation and the metalized wrap. The original installer did a quality job, I haven't seen any serious short cuts. All the joints are sealed with metalized tape, even the connection to the floor. Make sure you read my followup reply - I'm not sure that it's moisture. Since my first comment I looked closer and couldn't find any moisture. The seasonal service guy just said he thinks there's moisture in the system. But he was fairly new. He said that because a few registers that have significant grey/black deposits on the underside and in the first foot or so of ducting. And those registers are starting to rust in small areas, while the other registers and the inside of their ducts still look brand new. It's definitely not Stachybotrys, I've had that before, I know what it looks like. I don't even think it's regular mold, it just looks like dust buildup, but it's not evenly spread like dry dust. It's more like splotches or bundles, like dust that accumulates on water droplets. One register is very bad, literally covered in rust. And the gunk buildup in the duct is very high. But it's like dry dust and cobwebs. Maybe it was wet before at times, but I found no moisture and it 90 degrees today.
@@4wardnthought234 First of all, Ive been in this industry a long time. I know what I am talking about! 2nd, Most of my calls are from people who have tstats set below 70. I will tell you how it is! It will make the system work harder. 3rd, that low of temp is having the sytem run longer, sending much cooler air through your ducts and if your air flow is set right and moving slow can cause issues the one your facing now. 4th, if your duct work is incorrect for the 2.5 ton system you have now, plus duct an R4 instead of R6 or R8, that is contributing to the problem. 5th, if you have dust in your ducts, dirt captures moisture and can create problems. 6th, have your a proper service tech do a static pressure test done on your system! 7th, have your ducts cleaned. Get a thermal scan done of your house. Find out the R value of your duct work. And lastly, you can have whats called a "Duct blast test" done to find out the percentage of duct leakage.
If I have a residential air condition and it's operating with propane freon, I will put in a suction solenoid a liquid solenoid at the The evaporator together with a propane detector when it detect a leak is shut off. The solenoid is shut down the compressor
I HAVE FEW QUESTIONS; 1.WILL THIS REFRIGERANT REQUIRE DIFFERENT COILS? CAN WE USE CURRENTLY MANUFACTURED COILS BY JUST CHANGING PISTONS OR TXVS? ARE THERE PISTON CHARTS AVAILABLE FOR R32? 2. DIESEL EFFECT MEANS EXPLOSIVE, IF SOME INCOMPETENT TECHNICIAN INSTALLS AN AC WITHOUT PULLING A VACUUM AND CONDENSER GETS REALLY DIRTY UNDER A DECK WITH PRESSURES 500-600 (I HAVE SEEN IT MY SELF 650PSI ON MY GAUGES R410 WAS OVERCHARGED.) IMAGINE YOUR KIDS PLAYING NEXT TO IT…. 3. IF R22 HAS ONLY 0.055 GWP AND MUCH LOWER ODP THEN R410A WHAT WAS THE POINT OF PHASING OUT R22? CAN ANYONE EXPLAIN IT ? WHAT AM I MISSING? IS IT POLITICS MONEY OR WHAT? THANK YOU FOR SHARING GREAT VIDEOS!
It is all about money and power. There is nothing noble about these regulation changes. but If you wanna save on cooling. Move to a dry climate and build a "Wind catcher" system in your house and save 1,000's of dollars each year.
The thing I'm worried about is that most the contractors in our trade are not doing things properly now. And now we're going to put flammable refrigerants inside people's homes that requires a lot of extra preparation in precautions when most guys in our trade don't even read the freaking manual on the equipment they installed
10:43 fun fact because you're rightfully sweating about telling people about the compatibility of r290 with r-22 systems: Automotive engineers long assumed that flammable refrigerants would unacceptably raise the risk of fire in a crash when compared to r-134a. At some point in the past several years (I don't remember exactly when), someone conducted a test of the safety of an r134a system in a crash and found that the lubricant would start a fire on its own when it got sprayed onto the hot exhaust manifold in a crash. I hope nobody is dumb enough to read my comment and think it's safe to put 15lbs of propane in their residential system - it won't matter how much or how little lubricant is in that system
In the early stages before recovery was introduced, I was recovering gas in the Caribbean to save money and reusing back the gas before mainstream become a recovery requirement. I've been doing refrigeration since I was 14 years old with my uncle And that she's the one. I am 54 years old now
My 27 yr old A/C hasn't leaked. That is good for the environment. I looked into getting a heat pump. For me, there are no government grants at this time. I was quoted $7500 for a 3 season heat pump. Likely more when the new and improved flammable refrigerant comes into use. $7500 buys a lot of clean natural gas. I think I'll keep what I have
Tec bell. I agree R-22 was fine but they feel they need to change things that don’t need fixing.it’s like the old saying if it’s not broken don’t fix it!!!!
i also wondered why they shut down the outdoor unit. i imagine some of the new stuff could be programmed to pump down for mitigation. Your right, the people making the rules don't know anything about hvac.
We can solve that problem with the lines in the wall to prevent that problem. Just like how they use electrical pipes, double shielded or even you could probably use green Field protection but you want to keep the gas flowing if there's a leak from one end of the tube out the other end of the tube on the double venting a line within a line like a channel. We can move the gas outside the building
And in a free country you have every right to keep and use R-22. I do not believe for a second that R-22 deplete the Ozone layer. Ozone can be created and they do not want people talking about that, so we have to wonder why that is. The CHICOM will use R-12 no matter what our EPA orders.
Great info. Bryan. Thank you.
R-22 "significantly lower pressures" , yeah and equipment that lasted 20-30 years plus
100% correct
Been doing hvac 16+ years now. Still have a 23 year old r22 system that runs perfect. I will run it until I no longer can!!!
@@cliffanderson7544 I just serviced one from 1975. Someone cut the blower cap out and it has been running without a cap for I don’t know how long. The condensing unit is from 1995. Still chugging along.
The house I grew up
In had an American standard that went 35 years till it blew a condenser. The Heil replacement only made it 7 years.
Service three 1995 Lennox 5 ton condensers at a shop and all have the original compressors. They don’t make em like they used to..
Industrial generator tech here/ I have to say I enjoy your teaching style. I do not work in this field but your teaching style makes me want to listen. Be
Hi this is Mike Simmonds. I. Worked with you at delair I like your casts . I'm 65 now and
Still learning. You are never to old.
It's all about the price. Nothing to do with what it actually affects. Glad you brought up propane.
You really know your stuff Bryan. We appreciate you explaining the significance of the new refrigerants that will become the industry standard.
In 1979 at the tender age of 19 I went to Frigerator College. Ended up being a welding and rigging contractor for 30 yrs, but I can tell you all my ACs work perfectly and all of my vehicles are as cool as the other side of the pillow including my 64 Econoline (dual evaps) and my 32 coupe. AC has been good to me.
A friend of mine is a chemical engineer that lived through 40 years of these changes. He said it is NOT for the environment and never was. Twisted data on the effects of these chemicals was done deliberately. He said these changes keep the industry selling new equipment and the chemical companies like the one he was in management for, making new product.... He was very high up in a company you all would recognize. Our government is not what you think it is.
BINGO. Back when the Ozone problem was invented, R12 cost $1/lb in retail consumer sales. The stuff was used, as an example, for BB "machine guns" and to chill glassware for mixed drinks and so advertised on TV. Why so cheap? Off patent. Funny thing, the replacements were only manufactured when the maker paid a license fee.
Nope.
@@footiefan51 In the the 30 years I've been running my R22 unit, a typical newer system would've been replaced 3 or 4 times. How could the manufacture and disposal of all those POSSIBLY be better for the environment? "Efficiency?" If the new stuff is so much more efficient, how come 15,000BTU is still the max for a 15A circuit? You could get a 15K BTU window A/C that drew 13A in 1985. You'd think we'd at least be up to 18K BTU by now??
Damn , I'd like to hear what your friend has to say. That's wild to hear as a young HVAC technician. Thanks for sharing.
Ozone problem wasn't invented. A kind reminder that the CFC's were patented things that drove up the cost compared to the older non-patented refrigerants of the 30's like sulphur dioxide or.. r290. They banned those in favor of CFC's because they were safer - according to DuPont's lawyers. Anything they can patent and do. 1234yf is the new patented expensive stuff. R290 or R600a at least isn't patented and I think R32 is also out of patent. @@GilmerJohn
The two teachers taught well as usual.The class was interesting to learn from.The best class to teach with no mental health distractions with skybox proofreading.#GreatJob!
I'm v. To
55:00 You will eventually will have to have some type of mitigating active system in storage areas with sensor and a means to ventilate.
Go Chevron Deference ! This is crazy that we keep changing rules when patents run out
Good to see someone gets it. The excuses for doing this, are just that, excuses. Gwp, ozone depletion, what a massive scam.
@@drewtronics7406The Ozone cycles in and out and has nothing to do with R12.
Happens with pharmaceutical world as well
@@troydspain1099 💯!!!!
Chevron chevron is going to be overturned in our lifetimes. It's definitely on the chopping block. At least 3 justices are vehemently opposed to Chevron, and a couple more have significant concerns about its 'as applied" constitutionality.
Propane with something like 10% iso butane was supposed to be a pretty much drop in for R12. However there used to be significant fines for doing it
32:03 We used nail plates on wooden studs where NM cable is run in the wall closer than 2 3/4” to the wallboard (I think that’s even in chapter 70 of the NFPA code). We affectionately called them kickplates. But that was years ago, now.
I always learn a little more each new video, THANK YOU !!
I have been doing this crap for 40 years, it's always nice to keep up
I'm in IT - watched the whole thing. You're a great presenter.
Well hopefully the chevron case will significantly affect the EPA being able to make declarations about what can and can't be used
You are truly a blessing to this industry
I'd love to work for your company the training you provide to your employees is awesome most companies could care less.
Im in SC and work on appliances and have R600 in my hot van and never had it explode. I just cut both ends on either side on refrigerators when working on the sealed system (filter drier and low side process stub). Only thing that happened so far is at the compressor after cutting open the system I'll get a flame out. Just like a lighter flame.
10:46 cuba did this at a national level during the r22 phasedown. They had some issues when instructions weren't followed. R290 is starting to make a comeback in some appliances.
This looked like perfectly done presentaion. It would be facinating to see some of the notes that the people who were there took.
32:09 - I think it's called a nail plate in the Code; but, it is affectionately known as a "kickplate" in the electrical trade. We use them on wood studs with NM cable running closer than 2 - 3/4" to the rough wall.
I've spent the last couple of years doing commercial almost exclusively and only heard a little about this changeover, so was very nervous, but this video is very helpful. Thanks so much for great information and presentation, as always.
Just an update, I'm taking a certification class for it through my union local and I feel way, way better about all this. I'm not sweating this at all.
Great presentation…. Very in-depth knowledge of materials and actual repair/installation experience is very obvious and makes the training very understandable and relative….. Bob
The SCOTUS RULING striking down Chevron Deference may affect EPA powers going forward.
Let's hope so. Common sense should prevail to keep costs low for consumers, such as removing the leak repair requirements. None of these refrigerants are an issue with the environment, they are all about selling products covered by patents for maximum profit.
It's cancels them. EPA cannot write rulings that have legal effect.
@@hallkbrdz I'm guessing you consider Thomas Midgley Jr to be a hero?
Unfortunately I I think it would be too late to go back . All of the manufacturers all of the supply houses everyone is basically converted over to manufacturing and selling these new refrigerants. Except for the contractors who actually have to deal with this crap . All these extra sensors and Manufacturing lines and all this extra crap that we need is going to raise the cost of a residential system 30% at least. These big shops are going to start charging $50,000 for these freaking systems
@@jakbo_ Time to produce our own open source designs. I'm tired of this rat race.
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Explosive vs flammability are not one in the same.
E O.D. 😂
Lol there will be less Juan and Jose working on the side coz will probably explode
The part about not unsweating anything and to cut it out because of residual refrigerant in the lineset. Does this apply for example if I am changing a filter dryer, compressor or evap coil and I have the system recovered and shraders pulled and have nitrogen flowing? I would thing the nitrogen would have pushed any residual refrigerant out including displaced the oxygen to keep anything from igniting.
Why does the vacuum pump have to be A2L certified if the system is empty? Just a crazy question for thought.
Did after market automotive A/C yrs back and moved on to other things, so I did have my certificate for refrigerant handling etc,.. in the early 90's when 134a was fairly new to replace r12,there was a gas from a Chinese chemist called GU 2015. it was MORE efficient than 12 and was non cfc gas. Magic stuff. But 134 seemed to be the biggest thing on the market and Dow AND Dupont were cornering that market. We did buy some 2015 and used it for retrofits and customers were really happy with it. It was a straight replacement for 12. I heard of some shops replacing 12 with propane and I thought how crazy is that ?? Flammable refrigerant?? I bought a small window ac unit for my apt, and IT has flammable refrigerant. Crazy
Good job Brian. The regulations is almoust the same in Europe to. Love your videos. Learn a lot from . Ciao
I have always cut out components especially driers because when you heat up a drier it will release any moisture in the drier
Great crucial information explained very well. Thanks for your research and sharing this to help with the upcoming changes. This info is limited and we know we have a great deal of trial and error coming with these changes so this helps tremendously. Thank you
You're not supposed to sweat the filter drier off but it's okay to braze it back on?
Yes, you are flowing nitro at that point
You could flow nitro while you unsweat but pulling apart under flow is still not a great idea
You release any moisture in the drier when you heat it up and technicians start trying to remove it before it's hot enough and it's not good for the tubing
Is there going to be a rule about sitting the condenser 10feet away from the home?
Lol no
Body Armor and helmets will be required
Packaged system (no line set), 12 feet away from combustibles, solar powered, can only be installed and serviced by those who are EPA608+A3++A2L certified who are also members of the local union authorized to perform such work, used to chill water (special water subject to a special tax), that can then be piped into an air handler (also only solar powered), which provides you to be compliant with upcoming 2026 cooling regulations …
5:33 in Canada we've had to repair all leaks for a very long time, along with recovery (and the associated logging)
I've honestly lost count on the number of refrigerants I've worked with. This phase down won't change much for me.
They could add a pump down solenoid on the condenser liquid line. Leak sensor sends signal to air handler board, board sends 24v signal with extra wire to condenser. Solenoid closes and pumps down condenser. Compressor shuts off on low pressure switch. Only added 1 extra part and ran extra wire to condenser which usually there is spare wires already ran with the thermostat wire
This will also prevent the whole loss of the refrigerant in the house. Refrigerant will be trapped between the compressor reed valves and the liquid line. Will only loose what is in the evaporator and suction line
Can we sue epa for all the different refrigerants we breathed in. I got r12 22 410a 134 407c in my lungs every time I disconnect my gauges. My lungs are running on mixed refrigerants. Thanks Epa
😂 does that affect your freeze point?
My saturate lung temp is 45 degrees
What are you breathing when you are soldering and the refrigerant is In the atmosphere and flame burns the refrigerant and creates a gas that is very bad for you to inhale
Here is some scientific information that should be taught: A2L laboratory testing was not within the stoichiometric combustion range of the A2L Gas. This gas is combustable in concentrations of less than 13% at room temperature and normal atmospheric pressures. See the MSDS:
"Flammable gases, Category 1
Gases, which at 20°C (68°F) and a standard pressure of 101.3 kPa (14.7 psi):
(a) are ignitable when in a mixture of 13% or less by volume in air; or (b) have a flammable range with air of at least 12 percentage points regardless of the lower flammable limit.
Highly surprised the insurance companies are not changing the requirement for the piping on the new refrigerant with the widespread installations.
Greetings: I miss the days of Servel and sightglass days. Fortunately, some R still around. Thx 4 the share. Bsafe
How efficient is a commercial duct application or duct design on a residential home in Florida...
Question on the RDS it is located within the equipment it was mentioned that when refrigerant is detected the fan will energize, and the cooling mode will de energize. Do you know if there is a visible or audible alarm just to let the occupants know or the blower will just continue to circulate the leakage through the ductwork.
A2L systems are currently prohibited on Massachusetts
Good stuff.
So...r-32 could go in a 410 system but it wouldnt have all the new safety parts so we shouldn't retrofit?
Does it have a smell like propane
The instructor says that r-454 b is a , " mildly " flammable refrigerant, although the msds says that r-454 b is an extremely flammable refrigerant and that the gas can be explosive when it's concentrated in an enclosed space.
Mildly flammble is the actual ASHRAE designation
Extremely well presented, valuable info Bryan.
Does R22 or 410A produce phosgene gas if exposed to a torch, during a compressor "unsweating" for example? Keep getting mixed opinions out there. Thank you for such informative videos, keep up the great work!
That's what I was told it's just like mustard gas used in the military
Excellent training presentations; thank you
Are the compressors noticeably louder with A2L? I've noticed aprilaire dehumidifiers with A2L the compressors are annoyingly loud
To Fully Protect the OZONE LAYERS in the atmospheric..... ALL Nations and All industries must Comply with the EPA....... NOT just AC manufacturers/ AC Techs 👍👏
What happens if mitigation sensor fails or blower fails will the concentrated leak in the evaporator coil become dangerous. Is there an audible alarm in this situation.
Can’t wait for this transition to complete so I can finally upgrade my r-22 seer 10 unit from circa 2000. Skipped 410a entirely 😅
Sounds like a guaranteed and great investment just stocking up on 410 right now. Might sell off some stocks and buy a warehouse of 410 tanks.
You forgot to mention no smoking while working on a system
That just makes it easier to find the leaks. @@darylfortney8081
Why wait? Propane is available now, and is an upgrade in efficiency and performance to boot!
@@joez.2794 because they haven’t even really begun to release all their new models yet.
You made a comment in the video about leak repair requirements coming in Oct 2024 on systems with 15-50 lbs of refrigerant in them, do you have a link to more info on this subject ?
It's not like any sensors that have been done in the past fail sometimes or anything
Your presentation is very informative and easy to understand thank you for sharing!
in my 60's i always took pictures of my work
goldsmith / master jeweler 57 yrs experience
photovoltaic / solar thermal technician (not NABCEP certified) not necessary for me
DIYer in other fields
classic cars etc. love doing the work myself, yes i'm a cheap bastard
*enjoyed watching this video in it's entirety*
Just to replace AC in the future in a customers house with your brand. You may have to carry 3 different gauges. 3 different recovery bottles. 3 different vacuum pumps. 3 different recovery machines. That at least $6000.00 per truck just for AC just to work on any equipment.
what about R-1234YF used in vehicles can you tell me about that? and why its so expensive
Has anybody noticed a lot of 5 to 10 year old evap coils that are leaking. Especially the aluminum coils. Are they going to start building the equipment better?
higher pressure refrigerant (r410/R32) reducing equipment life and then race to the bottom on price means manufacturers compromising on copper quality.
No, manufacturers are not building equipment better. New coils are micro channel.
@@smacleod69It's for higher efficiency, they need more cleaning at least.. but they did microchannel back then too.
@@mikafoxx2717 Thats the biggest crock in HVAC history. They are not making micro channel for efficiency. Micro channels use less metal to make For the so called carbon foot print crap.
.. curious, why do you not "unsweat" or desolder anymore?
Will there be a new flush to purge with nitrogen for existing linesets?
What is the best performing refrigerant regardless of safety/enviro?
It does seem like the most demanding industrial refrigeration settings tend to use flammable/hydrocarbon refrigerants... i think Dupont played up the dangers to get generations of Americans terrified of it so they could sell their proprietary, worse-performing HFC/FC refrigerants.
Anyone that's not afraid of propane, to a reasonable extent, doesn't respect that it can absolutely do major harm. Not respecting that fact can lead to carelessness and a higher probability of a catastrophic event. I'm not saying no one should work with it but we should all give it the respect that it demands because it can 100% result in death and property damage.
Everyone should have a certain amount of fear to preserve the respect it requires.
So what's the difference between ODP vs GWP? and which is the more determining factor these days?
Ozone depletion happens for the next couple decades due to the chlorine, global warming potential is how many times worse than CO2 it is for warming the atmosphere, but doesn't destroy the ozone layer which protects us from skin cancer etc. r410a is something like 2,200x worse than CO2 when it gets into the atmosphere but no Ozone depletion like R12 (worst) or R22.
My dryers are flare dryers and the reason why it is is it's much easier to uncrack a nut. If you worry about the leaks on the flare, put loctite Why they don't do the same on the compressor except the discharge line
If the insides of my vents are sweating, that air space is already sealed and dehumidified.
The entire system is in the crawls space (4 ft high cinder block walls, mostly closed with several vent openings). Should I encapsulatr the crawl space and run a small window AC during summer to cool that air slightly?
I'm in North Alabama, very muggy and hot.
encapsulate and dehumidify Your crawl space has high humidity issues. And if your ducts are sweating on the inside. your air is moving too slow and colder. Do you have a 2 stage system or an invertor?
@@smacleod69
Nope, single stage.
Trane XR14 2.5 ton.
Split unit, handler is in middle of house in crawl space, compressor outside. All ducting is in crawl space.
It was installed 2 years ago, replacing the original heat pump from when the house was built only 16 years ago. The ducting was in good condition so we just used that.
On closer look, I don't see the vents sweating, no sign of moisture on any of the vents or duct interior and it's 90 degrees outside, while I keep the inside 69.
I may have been incorrect about the sweating, the service man said there was moisture getting in the system somehow because of the signs we were seeing.
While some of the registers still look brand new, a few have rust spotting on the inside surfaces and those also have heavier dust buildup inside the ducts. One of them is so bad the register is nearly engulfed in rust and the inside of the galvanized duct is getting rust spots.
How could some look brand new while the others are rusting? If it's not sweating from cold air on warm surface, what could it be?
@@4wardnthought234 69 degrees? Thats one problem. When your new system was installed, did you keep the original duct system? And if so, were the boots sealed inside with duct sealant? Are the boots insulated up to the floor in the crawl space. You can use spray foam around the boots to seal.
@@smacleod69
Why would 69 be a problem? Don't worry about what temp people like in their house, that's not your concern. Tell them how to get the air quality they want.
My followup reply answers 2 of your questions - we kept the original ducts and they are sealed from end to end with ¾ or 1 inch thick fiber type insulation and the metalized wrap. The original installer did a quality job, I haven't seen any serious short cuts.
All the joints are sealed with metalized tape, even the connection to the floor.
Make sure you read my followup reply - I'm not sure that it's moisture. Since my first comment I looked closer and couldn't find any moisture. The seasonal service guy just said he thinks there's moisture in the system. But he was fairly new.
He said that because a few registers that have significant grey/black deposits on the underside and in the first foot or so of ducting. And those registers are starting to rust in small areas, while the other registers and the inside of their ducts still look brand new.
It's definitely not Stachybotrys, I've had that before, I know what it looks like. I don't even think it's regular mold, it just looks like dust buildup, but it's not evenly spread like dry dust. It's more like splotches or bundles, like dust that accumulates on water droplets. One register is very bad, literally covered in rust. And the gunk buildup in the duct is very high. But it's like dry dust and cobwebs. Maybe it was wet before at times, but I found no moisture and it 90 degrees today.
@@4wardnthought234 First of all, Ive been in this industry a long time. I know what I am talking about! 2nd, Most of my calls are from people who have tstats set below 70. I will tell you how it is! It will make the system work harder. 3rd, that low of temp is having the sytem run longer, sending much cooler air through your ducts and if your air flow is set right and moving slow can cause issues the one your facing now. 4th, if your duct work is incorrect for the 2.5 ton system you have now, plus duct an R4 instead of R6 or R8, that is contributing to the problem. 5th, if you have dust in your ducts, dirt captures moisture and can create problems. 6th, have your a proper service tech do a static pressure test done on your system! 7th, have your ducts cleaned. Get a thermal scan done of your house. Find out the R value of your duct work. And lastly, you can have whats called a "Duct blast test" done to find out the percentage of duct leakage.
If I have a residential air condition and it's operating with propane freon, I will put in a suction solenoid a liquid solenoid at the The evaporator together with a propane detector when it detect a leak is shut off. The solenoid is shut down the compressor
Propane Freon 😂
Master Class, Thank you 🙏
"Pull the cores, draw the vacuum", you have now tested the system MINUS the cores. What part is the most likely to leak? THE CORES!
Great Information! Thank you for the class..
Would it be too much to ask for you to issue notifications for upcoming videos?
I HAVE FEW QUESTIONS;
1.WILL THIS REFRIGERANT REQUIRE DIFFERENT COILS? CAN WE USE CURRENTLY MANUFACTURED COILS BY JUST CHANGING PISTONS OR TXVS? ARE THERE PISTON CHARTS AVAILABLE FOR R32?
2. DIESEL EFFECT MEANS EXPLOSIVE, IF SOME INCOMPETENT TECHNICIAN INSTALLS AN AC WITHOUT PULLING A VACUUM AND CONDENSER GETS REALLY DIRTY UNDER A DECK WITH PRESSURES 500-600 (I HAVE SEEN IT MY SELF 650PSI ON MY GAUGES R410 WAS OVERCHARGED.) IMAGINE YOUR KIDS PLAYING NEXT TO IT….
3. IF R22 HAS ONLY 0.055 GWP AND MUCH LOWER ODP THEN R410A WHAT WAS THE POINT OF PHASING OUT R22? CAN ANYONE EXPLAIN IT ? WHAT AM I MISSING? IS IT POLITICS MONEY OR WHAT? THANK YOU FOR SHARING GREAT VIDEOS!
It is all about money and power. There is nothing noble about these regulation changes. but If you wanna save on cooling. Move to a dry climate and build a "Wind catcher" system in your house and save 1,000's of dollars each year.
Burned out terminal on the compressor that loses its complete charge with a shower of sparks … Boom
Lol maybe 50 yrs ago. Not today
I really appreciate these videos
What is HVAC School using to create those animations?
Can we still blow out drain lines with it?
Thanks for making these videos!
The thing I'm worried about is that most the contractors in our trade are not doing things properly now. And now we're going to put flammable refrigerants inside people's homes that requires a lot of extra preparation in precautions when most guys in our trade don't even read the freaking manual on the equipment they installed
10:43 fun fact because you're rightfully sweating about telling people about the compatibility of r290 with r-22 systems:
Automotive engineers long assumed that flammable refrigerants would unacceptably raise the risk of fire in a crash when compared to r-134a. At some point in the past several years (I don't remember exactly when), someone conducted a test of the safety of an r134a system in a crash and found that the lubricant would start a fire on its own when it got sprayed onto the hot exhaust manifold in a crash.
I hope nobody is dumb enough to read my comment and think it's safe to put 15lbs of propane in their residential system - it won't matter how much or how little lubricant is in that system
Any vaporized oil will ignite. Hence why diesel fuel burn!
Great video. Very informative.
Della and Senville are selling R32 mini splits.
We used to put propane in R-12 cars back in the day.
In the early stages before recovery was introduced, I was recovering gas in the Caribbean to save money and reusing back the gas before mainstream become a recovery requirement. I've been doing refrigeration since I was 14 years old with my uncle And that she's the one. I am 54 years old now
My 27 yr old A/C hasn't leaked. That is good for the environment. I looked into getting a heat pump. For me, there are no government grants at this time. I was quoted $7500 for a 3 season heat pump. Likely more when the new and improved flammable refrigerant comes into use. $7500 buys a lot of clean natural gas. I think I'll keep what I have
Very informational, Thanks!
Tec bell. I agree R-22 was fine but they feel they need to change things that don’t need fixing.it’s like the old saying if it’s not broken don’t fix it!!!!
Always awesome I formative videos. Thanks!
I use R290 in my 20 year old R22 system. It's not as efficient but it's close enough to not matter.
Great presentation, thanks
i also wondered why they shut down the outdoor unit. i imagine some of the new stuff could be programmed to pump down for mitigation. Your right, the people making the rules don't know anything about hvac.
We can solve that problem with the lines in the wall to prevent that problem. Just like how they use electrical pipes, double shielded or even you could probably use green Field protection but you want to keep the gas flowing if there's a leak from one end of the tube out the other end of the tube on the double venting a line within a line like a channel. We can move the gas outside the building
lp good 2 know .. i ? r12 was good stuff ?
a good torch is most important. ill show how ...free
I'm keeping my R-22 system forever.
And in a free country you have every right to keep and use R-22. I do not believe for a second that R-22 deplete the Ozone layer. Ozone can be created and they do not want people talking about that, so we have to wonder why that is. The CHICOM will use R-12 no matter what our EPA orders.
Nothing beats a Blue Rhino "R290" top off of a R22 system. True drop in right there 🤣
A really strong magnet will prove there's a steel striker plate when covered with sheet rock.
At 32:12 we call it nail plate.
It's also good to cut out a filter dryer so you don't push captured moister back into the system. But also good for A2L. So win win.
So what happens to the gas that is recoverd
10 years ago r410a