Nice to see you both "The Engineering Mindset" and "HVAC school" together i follow you both, you both doing great job and its very informative helpful, to the point and accurate
I'm going to be working in "startup" for hvac and this video; was so much more in depth than anything else I found online. This man took the time to explain every process of how to do it. At the same time explains why you do what you do. While everyone elses videos. they said some really wrong information that I lowkey at first thought was like okay its part of the job. This man with his videos basically called out these other "hvac tutorial lessons" and made them look like a work of fiction. I will be working my way down the entire playlist of 88 videos. Thank you so very much for your time, your explanations, and your brain power to help others succeed. Thank you sincerely. I'm a man who has earned everything himself no hand outs.. so this makes me feel respected as a newcomer trying to learn the trade, versus the other guys making me feel like i can ignore real problems and move on to get paid for doing a crap job. You are certainly a cut above.
It is so appealing to hear you explain things. Someone as brilliant as yourself (in any field, not only HVAC) who cares about sharing your hard-earned knowledge and wisdom is truly inspiring. I am someone who does not work in HVAC and still I love to watch and listen to your videos. You are a great teacher.
I am a retired electrical engineer. I designed radio & TV antenna systems, microwave links, and did human exposure to radio frequency energy safety studies. I like learning about other systems, plus it helps understanding my house's central AC system. Excellent tutorials, thanks for explaining terms and why it matters.
These videos are such a blessing my online HVAC course goes through a book that doesnt explain these concepts well at all. Thank you for taking the time to break down these topics its tremendously helpful.
Holy Cow !! All I wanted to do was to replace the AC compressor on my Volvo. I've discovered a whole universe just based upon air conditioning. completely overwhelmed.
Don't be overwhelmed, it's a lot easier than you think. Just take your time replacing the parts and have a local repair facility do the leak check, evacuation and charge. You'll save a lot of money and feel good about doing something for yourself.
Thanks for posting this video, we just did some training with our team this morning and used your video as part of the training. Our entire team was very impressed. One comment was that it is difficult to find a video that mimics the process we have as a team. Thanks again and keep up the great videos
Bryan, Great video explanation on how to properly set up equipment for evacuation. I once had to evacuate a low temperature drier used in a leather tannery. We had to install a new coil, which the factory had pressure tested with water. Multiple evacuations and multiple oil changes over several days just to get the coil dry. It also helps, when dealing with a wet system, to do partial evacuations, breaking the vacuums with DRY nitrogen which, will soak up some of the moisture. Also slow DRY nitrogen purge, before evacuation is started will help speed things up. Not all nitrogen is DRY. I once used up a small nitrogen cylinder, and opened the valve an inverted it when it was empty, and water ran out!
Like WOW Bryan you are one of the most intelligent tradesman tech that I have ever seen. Nice balance you do not waste a word and speak with data and useful information. Great video.
thank you i have been in commercial hvac for 25 years and have always evacuated the same way. through my manifolds. i have been working on trane wshps recently and it takes a 1 ton 6 hours to get to 800 microns and that is with triple vacuuming it. now with your way i can do it in 10 mins and get 250 microns
Never knew that there is such a delay in both measuring points where the micron gauges tap into. This clearly tells us that the refrigerant system needs to be levelled out before proceeding. Thanks for the hot tip, Sir.
I really appreciate your tutorials. I stumbled on a nifty procedure to help eliminate moisture in a system I’d like to share since your speaking on the subject of nitrogen and moisture; I had a situation where line set had been cut at condenser for a change out and left open- uncovered overnight and it rained hard that night. I had installed a site glass with moisture indicator ring and reached a vacuum of 500 microns, but my moisture indicator was still very pink( high moisture content). I tried multiple evacuations as per described in this video and frantically searched forums. It was the end of the day now, as I’d removed and replaced the 3rd floor apartments inside and outside units by myself. In desperation, I charged the unit with 200 psi of nitrogen and let it sit overnight ( I didn’t run across this exercise anywhere I looked). The following morning, I pulled a vacuum again and in very short time my moisture indicator went to green ( dry ). Pulled to little over 300 microns and all’s well. Cheers!
From my experience im 30 year old with 3 year of hvac experience 1 year of duct work and the two on the technical side..and im just now fully understanding refrigeration and its flow..you just need to practice every single day to understand it ..once you understand how everything flows you can diagnose bad txvs without being wrong..but when youre new you say its this and that and realize 3 parts later it was something so simple
I am about to show my hvac students this video. We our going over Refrigerant System evacuation, refrigerant system charging, and trouble shooting air conditioning system. I hope this video will be beneficial for them.
Hey, this is great! This is long for a RUclips video, but short and very snappy for a LECTURE. I feel like I'm back in school, in a good way. I'm here for general technical interest, have worked with vacuum systems in general, and also Neon. Slowly becoming aware that what we're doing when making a Neon tube has some overlap with what people are doing with the HVAC vacuum pumps there.... I've been looking at that gear my whole life and never really understood what people were trying to do with those gauges. Now halfway through one video it seems surprisingly clear! I'm sure this is a simplified presentation and don't want to mess it up, (but) at 18:30 or so, talking about slight rises in pressure, there are little leaks of course, but then there are "virtual leaks" which are not in software, no! They are what we deal with all day in Neon, or in other high-vacuum work. It's well known that when you exhaust something with a mechanical pump your troubles have just begun! So, a quick evacuation can remove the bulk water, but there's still LOTS of water sort of stuck to the surfaces inside the system, and it takes some force to get it out. Either LOTS of heat (you hint at this with the heat gun), or electric discharge (as in Neon processing) or TIME. So you could evacuate a system for a long time with a high vacuum pump, and it WILL "harden" in time. This information is a few generations old now, but not widely advertised. Anyway, the time for a system to degas itself under high vacuum might be DAYS if there's no heat involved. SO, trying to put all that into like one sentence: It might be that if you do everything right, clean and tight, fresh oil in the pump and everything... there will be some rise in the vacuum and NOTHING is leaking. Hey, don't you guys have "dryers" in the system to take care of these last few molecules? Anyway, I thought that might be good news, and also it's just something that's a big issue in my own life right now. Thanks for this dynamic and clear explanation! I'm going to finish the video now.
Absolutely great! GREAT! GREAT! Great! Came out of early, early retire, to provide support to approx 5 contractors in my new are. Now spending most time, getting novice girls and guys up to snuff for their bosses. I never take "all" the credit! You're one of three I push them to watch. You all fit like a glove, and I look like a master. My love for this work is also flourished. Could I get another 30vrs of this. I do now. I'll make 80 easy, with new stuff to learn, & older stuff to learn better!!! Thank you so much!!
Great Tips and explanations for beginners and refreshers for the old timers too. Carrier doesnt advocate running your refrigerant lines underground though. i use CRTs on both sides of the unit and attach the 1/4" hoses to the side ports on the Appion CRTs that i have removed the cores from and pull from both sides into a 3/8" and the yellow 1/4" hoses attached to the Vacuum Pump, with the Micron Gauge attached to the Vapor side of the unit on the end port of the CRTs. In doing this i can isolate the system with the valves on my hoses and do the standing test and then once i know the system is good i can reopen my valves continue to pull a further vacuum. Close the valve on the CRT that is attached to the Vapor side and remove the Micron Gauge and then immediately replace it with the core that i had removed from the condenser and either critical charge the system before i release the refrigerant in the condenser. Basicly i can replace the cores and do what is needed without having to mess with anything other than taking a micron gauge off and switching it with the core all the while pulling an even deeper vacuum. My systems are always pulled down to 89 Microns and end a (seven minute standing test - Carrier Specs) between 180-230 Microns. Great Video though loved the detail and how much you know about this trade. Just wanted to lend my opinion on the hose setup and how its a little more convenient and will still end with the same result.
Most excellent explanation and instruction....I'm semi retired, in my 70's, still working the trade, not as often as I used to, but still humping and I'm still learning...This video, helped me get better...My thanks to the gent that make it.
I have been doing HVAC for 15 years and this video blew my mind! Very insightful, thank you for the knowledge sir! Can you please tell me where I can get the hose and clamps for that set up? I have never seen this at a supply house and it is very effective!
THANK YOU!! FINALLY SOMEONE WHO IS TRYING TO TEACH THE (PROPER VACUUM) TECHNIQUE!!! Just one thing though.. You (MUST) use a VCT on the vacuum gauge side to avoid the oil contamination on the micron gauge!! Once satisfied after "ISOLATION", shut off the vct and remove the micron gauge, once you are ready to put core in, you can purge some refrigerant just to make sure no air is in the core tool before you put the core in after vacuum gauge is removed! TIP 1: When pulling vacuum on "USED SYSTEM", Isolate when vacuum micron drop stalls, if the micron gauge drops during the vacuum isolation it is a indication of water or refrigerant trapped in old oil remaining which means you need to reopen VCT/VACUUM and let vacuum resume for longer time to try and boil said water off from oil... TIP 2: NEW LINE SETS HAVE (NOTHING) IN THEM!!!! So on a brand new system install you can pull a vacuum as (LOW AS YOU WISH TO GO) because the actual line set copper and evaporator has nothing but "TEST NITROGEN" and nothing more!! GO AS LOW AS YOU CAN FOR LONGEVITY I.E 25 MICRONS!!! The lower the better!! WELL DONE BRIAN!! WELL DONE INDEED!
iconbadgta vct on micron gauge side isn’t a must if it’s able to handle pressure like the one shown. The angled coupler is what protects from possible oil contamination. If the sensor does get contaminated, a little rubbing alcohol is all that’s needed to get the sensor back as good as new
@@jeffb8437 I (ALWAYS) use a Fieldpiece SVG3.. It is the (BEST) there is in my opinion with all the features and price range it is in.. Can be a bitch though to clean...
Concise with no stuttering or searching for words. A sign that he understands the subject very well. Every question I have ever had on this subject was answered. Brilliant job!
Excellent video Bryan . As the head on engineering at Javac I meet lots of seasoned technicians that don't know half this stuff . keep up the good work.
Great video, Brian. I little tip. Those oil quarts are meant to be held and poured from the other side. So it doesn't "glug glug glug" when it comes out.
Well Presented Video, great narration and equipment explanation. Process procedures revealed without a condescending attitude, also common errors exposed, with helpful remedies. 10 out of 10....Great JobGuys
Bryan you are the man. Your delivery and knowledge on this subject of HVAC is second to none. I am a big DIY guy who has done most DIY stuff except AC refrigerant type work. Probably never will but at least I know what it’s all about. I understand everything you say and it is clear you have great knowledge and passion for this subject. Great delivery. Thanks
Your highly appreciated this is the best tutorial video I seen on here. You rock 🪨💪🏿👁️ peace and light. You got a pure soul many more blessings 🙏🏿 coming your way
I’m currently going to school, your videos and a couple of other channels are really helping me out understand the information apart from the lectures and in class labs 👍💯
That is in a dynamic situation; if you stop the pump,(that becoming a static situation then),both readings will be the same; also, an experienced technician will do that while vacuuming ,and interpret the rapidity of the equalization of both pressures to look for obstructions in the system; but *rush* jobs do not allow for that....
Basically exactly what I do. The only thing I might do different is if I'm working on a system that is flat to start. In this case I hook up a charging hose with an isolation valve at the end hooked up to the port on the core tool with the valve closed, with the hose charged with refrigerant. The reason I do this is to not loose any vacuum after I do my pull down and decay test while hooking up a hose. This allows me to go straight from the decay test to charging.
Sou Brasileiro, e essa é a melhor aula que eu já assisti sobre vácuo, muito completa, des do início teórico até a prática final. Parabéns, muito boa a aula.
Wow, One of the best evacuation procedure videos I've seen in a long time. The ONLY thing I would add (sorry if I missed it) is to clear the air behind the "ball" on the ball values by actuating them (close and open) a few time when
That was an excellent tutorial of a complete residential HVAC system. Other than when a system has been repaired it's my understanding that there would be no leaks other than a small leak at the presser compressor when the clutch engages and disengages, as in an automotive, HVAC set up. in theory, we know that a perfectly sealed system will last indefinitely as long as the mechanical components remain in working condition. And example of that would be your parents refrigerator from the 1950s or 60s. They're still going because there's less components a.k.a. no sensors no crap. There's only one part the compressor and possibly a fan to blow the air through the refrigerator. Those systems back, then were all done by hand, rather than buy machine or robot, decreasing chances of our unintentional leak from a weld joint etc. I know nowadays time is money and the air-conditioning systems of today while more efficient. Yes that comes at a cost of quality. I feel that if I repair is done correctly as per an automotive HVAC system. There should be no microscopic leaks other than the microscopic small leak at the compressor clutch being driven by the Engines serpentine belt, which drives many other accessories as well. It's not uncommon for an automotive HVAC system to go 15 sometimes 20 years before it starts to become low on refrigerant if the maintenance has kept up and what not. Does that theory hold through with modern residential HVAC systems when compared to the 1950s and 60s large, inefficient yet bulletproof HVAC systems? As always keep up the good work!
First let me say I know nothing about HVAC systems. I am retired and basically I watch these videos for entertainment . I like learning new things and this is a good way to do it. My question “and this may show my stupidity” but when is the evacuation of a system necessary. Is it only done when components are changed out or at the initial installation I love watching your videos so keep them coming. Thanks
Anytime the system is opened to air you must evacuate it before refrigerant can be put in. Air and moreso water in an air conditioner will cause issues. Air is non condensable and will raise the high side pressure and can cause something like a vapor lock where the air blocks liquid refrigerant flow in the condenser. Water can freeze in the system causing all sorts of problems.
@johnwhite2576 most systems will have service ports where you can attach a hose to add refrigerant. So as long as there is still pressure in the system you can add refrigerant without pulling a vacuum. But some systems cannot be accurately with that method and the charge must be weighed in. In those cases all refrigerant must be pulled out and the entire charge is weighed in.
Nice Brian.... same micron guage and procedure I use! Although after evacuation I always pre charge the line set and evap coil with a little reefer before opening the service valves.
We once ran a vacuum pump for 4 days. Broke the vacuum with nitrogen once a day and did about 6 oil changes on the vac pump to remove moisture from a system. That pump still works, and so does the system but as you said, very time consuming and can’t be good for the pump
Hello, A micron is a measurement of distance, pretty much it will tell you how close you are to a perfect vacuum. Great video. This channel is absolutely a great contribution to HVACR community.
To be more accurate, the microns used in HVAC are “microns of mercury.” A micron itself is a thousandth of a millimeter. A micron of mercury is a measure of pressure. It’s so small that traditional bourdon tube gauges aren’t accurate enough to measure it. Digital vacuum gauges actually measure temperature and convert to pressure.
Wow.. very comprehensive. Worth a replay. I now have a question.. If you are pulling from both sides with two hoses to the pump, where should the micron vac that's be placed and will it over estimate the depth of the vacuum ? Ahh I just heard the answer at the end on second play..
Great video. I just had a technician come out and change my liquid line filter that was leaking and I noticed he didn’t pull vacuum. When I asked why he said you don’t have to when it’s a quick job. System is 10 years old will this damage my unit ? He added refrigerant check the pressure and got paid. A/c is cooling great but now I feel like it won’t last. Thoughts?
Very detailed and very good, however, way over the top. Any day I'd rather have too much info than not enough, and for this I applaud you for sharing this! You are truly an AC expert. For most folks, this job really isn't super complicated; don't be scared to do this yourself. This may be good info, but you don't need to be super scientific about this unless your installing a very expensive commercial system. Anyone can do this just as well with a set of cheap gauges 1/4" and a small vacuum pump, albeit it will take more time.
I’ll admit it, I haven’t used nitrogen to pressure check a system since I’ve gotten trublu hoses and a vp85 vacuum pump because I can tell on a residential split system if it is leak free in a matter of about 1 minute instead of 20 to 2-3 days. The other thing that has screwed with me before too is the fact the nitrogen is not as inert as people think and if you pressure test a system overnight and it’s colder the next day you may waste a significant amount of time tracking down a leak that doesn’t exist.
I wish I could get the guys at the company I work for to understand this. I only do ductless systems. Nobody uses a torque wrench, nobody pressure checks to the right pressure and evacuations are just a joke. I’m the only one that installs and evacuates properly. The funny part about this whole thing is that I’m not an HVAC guy. I’m a licensed electrician who installs ductless units better than all the HVAC guys. I’m so tired of theses guys doing the customer wrong that I’m seriously considering going back out on my own. Thanks for all the good videos.
Hi, continue to to do your best best it will be rewarding. I've allways done my way toward a big achievement I've learned all by myself All the best Good on you Mate DomIJ
Great video! Definitely going to be sharing this to my co-workers. One question sir, At the end of the video when you are pulling with 2 hoses and you hook your micron gauge into the service port on the valve core removal tool do you need to take that schrader out of there so you're micron gauge can read properly?
Yeah, I've always wondered about pressurizing a line set that has a 'Hard Shut Off TXV'. How does the pressure get from the high side to the low side. Now I know. Interesting. Thanks for the info.
I forgot how much but when I bought my appion half inch hose the difference was significant. Regardless it will take years for a hose to take a dump if taken care of
The appion ones are much better. That's what I use. They will last forever if you take care of them. Just replace gaskets periodically and lube them w vac pump oil before you hook them up
Great video as always. Really appreciate your knowledge in time ..quick question in this video you’re showing a female a female quarter inch fitting hooking to your micron gauge. I’ve been looking all over for this fitting but cannot find it. Is there a certain description for this fitting. thanks again. You guys do a great job educating us HVAC guys good thanks
Very nice video and well explained , I would like to see - how and when one should vacuum one side of the unit.- High and low side of the unit.... thanks if you can and thanks even if you don't want to... thanks again. you do good work!!!
Great video great information but I do have a question tho why did you open the liquid line first instead of the suction side don't you want that oil to suck right back to the compressor instead of traveling all through the system and back to the compressor?
Awesome videos. I heard you say in one of them that you were in Florida, so I went and looked up Kalos Services and got excited when I saw you had a 352 area code. Unfortunately , you don't service my area (Citrus County). Bummer. But again, awesome videos! I certainly appreciate all the information.
In a system change out. Would it not be right to also change the evaporator coil?usually when the condenser has to be changed, I would think it makes sense to also change the evaporator coil.🤔🤔🤔🤔🤔
Great video, Bryan. So many good tips!
TEM you see that's the way on speaking english.
Same with yours Paul. You and Bryan are one of my 5 go to channels. Keep up the great work guys, it's appreciated more than you know👍👏
Nice to see you both "The Engineering Mindset" and "HVAC school" together i follow you both, you both doing great job and its very informative helpful, to the point and accurate
They h TY up Stui r Hugh juju I
Great work guys👍
I'm going to be working in "startup" for hvac and this video; was so much more in depth than anything else I found online. This man took the time to explain every process of how to do it. At the same time explains why you do what you do. While everyone elses videos. they said some really wrong information that I lowkey at first thought was like okay its part of the job. This man with his videos basically called out these other "hvac tutorial lessons" and made them look like a work of fiction. I will be working my way down the entire playlist of 88 videos. Thank you so very much for your time, your explanations, and your brain power to help others succeed. Thank you sincerely. I'm a man who has earned everything himself no hand outs.. so this makes me feel respected as a newcomer trying to learn the trade, versus the other guys making me feel like i can ignore real problems and move on to get paid for doing a crap job. You are certainly a cut above.
Page is called HVAC school for a reason
W comment
THIS is how you know someone knows their stuff. They explain complex things in a simple way. Thank you!
Aircondeshion systom 2methad self evcacuom methad evertiveing typed vacuom -0to-30 ppint methad vacomed colde chergeing methad very good shering methad vacuom pump using micro mercury cul methas psi using ..
It is so appealing to hear you explain things. Someone as brilliant as yourself (in any field, not only HVAC) who cares about sharing your hard-earned knowledge and wisdom is truly inspiring. I am someone who does not work in HVAC and still I love to watch and listen to your videos. You are a great teacher.
Thankyou gues shering good
Same here I’m an electrician but am enjoying this
I agree 100 percent if it wasn't for you.having great mentor s makes all the difference in the world. Thank you so much for sharing your knowledge
I am a retired electrical engineer. I designed radio & TV antenna systems, microwave links, and did human exposure to radio frequency energy safety studies. I like learning about other systems, plus it helps understanding my house's central AC system. Excellent tutorials, thanks for explaining terms and why it matters.
😊
Sounds interesting. Where can i learn more about effects (if any) of exposure to radio freq energy?
Thanks
Can you tell us how we block millitary/ harrp frequency emf? They are frying us ALL to death...Please help!
What frequencies did you do your studies in?
These videos are such a blessing my online HVAC course goes through a book that doesnt explain these concepts well at all. Thank you for taking the time to break down these topics its tremendously helpful.
Holy Cow !! All I wanted to do was to replace the AC compressor on my Volvo. I've discovered a whole universe just based upon air conditioning. completely overwhelmed.
Good shit ain't it
Welcome to the world of hvac. We take our vacuums serious.
Don't be overwhelmed, it's a lot easier than you think. Just take your time replacing the parts and have a local repair facility do the leak check, evacuation and charge. You'll save a lot of money and feel good about doing something for yourself.
@@keithglynn9237 i want to replace my HVAC. I am confident I can learn how to. Thanks for that tip
Mvac is nothing compared to hvac. Mvac is bottom of the barrel of this world.
Thanks for posting this video, we just did some training with our team this morning and used your video as part of the training. Our entire team was very impressed. One comment was that it is difficult to find a video that mimics the process we have as a team. Thanks again and keep up the great videos
Man you go in deep into hvac then my instructor ever did i have a epa universal and i still learning alot more with each of your videos
Yes he's terrific!
I'm not an HVAC tech, I just walked into that test and got my universal.
Dude - perhaps the easiest to understand tutorial on the web. Good on you sir - awesome post!
Bryan, Great video explanation on how to properly set up equipment for evacuation. I once had to evacuate a low temperature drier used in a leather tannery. We had to install a new coil, which the factory had pressure tested with water. Multiple evacuations and multiple oil changes over several days just to get the coil dry. It also helps, when dealing with a wet system, to do partial evacuations, breaking the vacuums with DRY nitrogen which, will soak up some of the moisture. Also slow DRY nitrogen purge, before evacuation is started will help speed things up. Not all nitrogen is DRY. I once used up a small nitrogen cylinder, and opened the valve an inverted it when it was empty, and water ran out!
Like WOW Bryan you are one of the most intelligent tradesman tech that I have ever seen. Nice balance you do not waste a word and speak with data and useful information. Great video.
thank you i have been in commercial hvac for 25 years and have always evacuated the same way. through my manifolds. i have been working on trane wshps recently and it takes a 1 ton 6 hours to get to 800 microns and that is with triple vacuuming it. now with your way i can do it in 10 mins and get 250 microns
If every inspiring HVAC student watches your VERY WELL DONE INSTRUCTED VIDEOS they would be LIGHT YEAR'S AHEAD of the CLASS.
GREAT JOB.👍🏻
The little connections and how to adapt to every set up was awesome. No to mention the depth of detailed technical info.
This is great. 5 years in the industry and I love learning ways to make my job easier and systems last longer
Never knew that there is such a delay in both measuring points where the micron gauges tap into. This clearly tells us that the refrigerant system needs to be levelled out before proceeding. Thanks for the hot tip, Sir.
I really appreciate your tutorials. I stumbled on a nifty procedure to help eliminate moisture in a system I’d like to share since your speaking on the subject of nitrogen and moisture; I had a situation where line set had been cut at condenser for a change out and left open- uncovered overnight and it rained hard that night. I had installed a site glass with moisture indicator ring and reached a vacuum of 500 microns, but my moisture indicator was still very pink( high moisture content). I tried multiple evacuations as per described in this video and frantically searched forums. It was the end of the day now, as I’d removed and replaced the 3rd floor apartments inside and outside units by myself. In desperation, I charged the unit with 200 psi of nitrogen and let it sit overnight ( I didn’t run across this exercise anywhere I looked). The following morning, I pulled a vacuum again and in very short time my moisture indicator went to green ( dry ). Pulled to little over 300 microns and all’s well. Cheers!
This is one of the greatest technical videos I've seen, period.
From my experience im 30 year old with 3 year of hvac experience 1 year of duct work and the two on the technical side..and im just now fully understanding refrigeration and its flow..you just need to practice every single day to understand it ..once you understand how everything flows you can diagnose bad txvs without being wrong..but when youre new you say its this and that and realize 3 parts later it was something so simple
I am about to show my hvac students this video. We our going over Refrigerant System evacuation, refrigerant system charging, and trouble shooting air conditioning system. I hope this video will be beneficial for them.
Hey, this is great! This is long for a RUclips video, but short and very snappy for a LECTURE. I feel like I'm back in school, in a good way. I'm here for general technical interest, have worked with vacuum systems in general, and also Neon. Slowly becoming aware that what we're doing when making a Neon tube has some overlap with what people are doing with the HVAC vacuum pumps there.... I've been looking at that gear my whole life and never really understood what people were trying to do with those gauges. Now halfway through one video it seems surprisingly clear! I'm sure this is a simplified presentation and don't want to mess it up, (but) at 18:30 or so, talking about slight rises in pressure, there are little leaks of course, but then there are "virtual leaks" which are not in software, no! They are what we deal with all day in Neon, or in other high-vacuum work. It's well known that when you exhaust something with a mechanical pump your troubles have just begun! So, a quick evacuation can remove the bulk water, but there's still LOTS of water sort of stuck to the surfaces inside the system, and it takes some force to get it out. Either LOTS of heat (you hint at this with the heat gun), or electric discharge (as in Neon processing) or TIME. So you could evacuate a system for a long time with a high vacuum pump, and it WILL "harden" in time. This information is a few generations old now, but not widely advertised. Anyway, the time for a system to degas itself under high vacuum might be DAYS if there's no heat involved. SO, trying to put all that into like one sentence: It might be that if you do everything right, clean and tight, fresh oil in the pump and everything... there will be some rise in the vacuum and NOTHING is leaking. Hey, don't you guys have "dryers" in the system to take care of these last few molecules? Anyway, I thought that might be good news, and also it's just something that's a big issue in my own life right now. Thanks for this dynamic and clear explanation! I'm going to finish the video now.
Absolutely great! GREAT! GREAT! Great! Came out of early, early retire, to provide support to approx 5 contractors in my new are. Now spending most time, getting novice girls and guys up to snuff for their bosses. I never take "all" the credit! You're one of three I push them to watch. You all fit like a glove, and I look like a master. My love for this work is also flourished. Could I get another 30vrs of this. I do now. I'll make 80 easy, with new stuff to learn, & older stuff to learn better!!! Thank you so much!!
U need to be commended for your collaboration efforts you are making with other channels on RUclips. Thank you very much
Great Tips and explanations for beginners and refreshers for the old timers too. Carrier doesnt advocate running your refrigerant lines underground though. i use CRTs on both sides of the unit and attach the 1/4" hoses to the side ports on the Appion CRTs that i have removed the cores from and pull from both sides into a 3/8" and the yellow 1/4" hoses attached to the Vacuum Pump, with the Micron Gauge attached to the Vapor side of the unit on the end port of the CRTs. In doing this i can isolate the system with the valves on my hoses and do the standing test and then once i know the system is good i can reopen my valves continue to pull a further vacuum. Close the valve on the CRT that is attached to the Vapor side and remove the Micron Gauge and then immediately replace it with the core that i had removed from the condenser and either critical charge the system before i release the refrigerant in the condenser. Basicly i can replace the cores and do what is needed without having to mess with anything other than taking a micron gauge off and switching it with the core all the while pulling an even deeper vacuum. My systems are always pulled down to 89 Microns and end a (seven minute standing test - Carrier Specs) between 180-230 Microns.
Great Video though loved the detail and how much you know about this trade. Just wanted to lend my opinion on the hose setup and how its a little more convenient and will still end with the same result.
Most excellent explanation and instruction....I'm semi retired, in my 70's, still working the trade, not as often as I used to, but still humping and I'm still learning...This video, helped me get better...My thanks to the gent that make it.
still humping? what does that even mean, pretty lame way to talk
@@gracida6 Humping is an old expression of laboring for a trade...Not knowing what it means says a lot about you bud...Not very worldly in short.
I greatly enjoy your videos. It’s nice to see a a young man making the industry better one Conversation at a time.
Glad you enjoy it!
I keep rewatching your vids to beat this stuff into my head. Thanks so much for sharing this clear and detailed information for free.
Glad it was helpful!
I have been doing HVAC for 15 years and this video blew my mind! Very insightful, thank you for the knowledge sir! Can you please tell me where I can get the hose and clamps for that set up? I have never seen this at a supply house and it is very effective!
THANK YOU!!
FINALLY SOMEONE WHO IS TRYING TO TEACH THE (PROPER VACUUM) TECHNIQUE!!!
Just one thing though.. You (MUST) use a VCT on the vacuum gauge side to avoid the oil contamination on the micron gauge!!
Once satisfied after "ISOLATION", shut off the vct and remove the micron gauge, once you are ready to put core in, you can purge some refrigerant just to make sure no air is in the core tool before you put the core in after vacuum gauge is removed!
TIP 1: When pulling vacuum on "USED SYSTEM", Isolate when vacuum micron drop stalls, if the micron gauge drops during the vacuum isolation it is a indication of water or refrigerant trapped in old oil remaining which means you need to reopen VCT/VACUUM and let vacuum resume for longer time to try and boil said water off from oil...
TIP 2: NEW LINE SETS HAVE (NOTHING) IN THEM!!!! So on a brand new system install you can pull a vacuum as (LOW AS YOU WISH TO GO) because the actual line set copper and evaporator has nothing but "TEST NITROGEN" and nothing more!! GO AS LOW AS YOU CAN FOR LONGEVITY I.E 25 MICRONS!!! The lower the better!!
WELL DONE BRIAN!! WELL DONE INDEED!
iconbadgta vct on micron gauge side isn’t a must if it’s able to handle pressure like the one shown. The angled coupler is what protects from possible oil contamination. If the sensor does get contaminated, a little rubbing alcohol is all that’s needed to get the sensor back as good as new
@@jeffb8437 I (ALWAYS) use a Fieldpiece SVG3.. It is the (BEST) there is in my opinion with all the features and price range it is in.. Can be a bitch though to clean...
Concise with no stuttering or searching for words. A sign that he understands the subject very well. Every question I have ever had on this subject was answered. Brilliant job!
People don't deliberately stutter just to annoy you. Some of the worlds best educators have a speech impediment...
Excellent video Bryan . As the head on engineering at Javac I meet lots of seasoned technicians that don't know half this stuff . keep up the good work.
Great video, Brian. I little tip. Those oil quarts are meant to be held and poured from the other side. So it doesn't "glug glug glug" when it comes out.
Yes, I always forget that
Well Presented Video, great narration and equipment explanation.
Process procedures revealed without a condescending attitude, also common errors exposed, with helpful remedies.
10 out of 10....Great JobGuys
Bryan you are the man. Your delivery and knowledge on this subject of HVAC is second to none. I am a big DIY guy who has done most DIY stuff except AC refrigerant type work. Probably never will but at least I know what it’s all about. I understand everything you say and it is clear you have great knowledge and passion for this subject. Great delivery. Thanks
Your highly appreciated this is the best tutorial video I seen on here. You rock 🪨💪🏿👁️ peace and light. You got a pure soul many more blessings 🙏🏿 coming your way
I’m currently going to school, your videos and a couple of other channels are really helping me out understand the information apart from the lectures and in class labs 👍💯
That's a great demonstration of the difference in vacuum at the pump and in the system! Excellent video!
That is in a dynamic situation; if you stop the pump,(that becoming a static situation then),both readings will be the same; also, an experienced technician will do that while vacuuming ,and interpret the rapidity of the equalization of both pressures to look for obstructions in the system; but *rush* jobs do not allow for that....
Basically exactly what I do. The only thing I might do different is if I'm working on a system that is flat to start. In this case I hook up a charging hose with an isolation valve at the end hooked up to the port on the core tool with the valve closed, with the hose charged with refrigerant. The reason I do this is to not loose any vacuum after I do my pull down and decay test while hooking up a hose. This allows me to go straight from the decay test to charging.
Great info. Bryan and guest. Thanks for keeping us well informed.👍👍👍👍👍👍👍👍👍👍.
Sou Brasileiro, e essa é a melhor aula que eu já assisti sobre vácuo, muito completa, des do início teórico até a prática final. Parabéns, muito boa a aula.
Wow, One of the best evacuation procedure videos I've seen in a long time. The ONLY thing I would add (sorry if I missed it) is to clear the air behind the "ball" on the ball values by actuating them (close and open) a few time when
That's was i was told once by Ritchie Engineering tech support.
Excellent teacher, and fully detailed. Couldn’t be better!
Awesome video. This is the type of content this industry has needed
That was an excellent tutorial of a complete residential HVAC system. Other than when a system has been repaired it's my understanding that there would be no leaks other than a small leak at the presser compressor when the clutch engages and disengages, as in an automotive, HVAC set up. in theory, we know that a perfectly sealed system will last indefinitely as long as the mechanical components remain in working condition. And example of that would be your parents refrigerator from the 1950s or 60s. They're still going because there's less components a.k.a. no sensors no crap. There's only one part the compressor and possibly a fan to blow the air through the refrigerator. Those systems back, then were all done by hand, rather than buy machine or robot, decreasing chances of our unintentional leak from a weld joint etc. I know nowadays time is money and the air-conditioning systems of today while more efficient. Yes that comes at a cost of quality. I feel that if I repair is done correctly as per an automotive HVAC system. There should be no microscopic leaks other than the microscopic small leak at the compressor clutch being driven by the Engines serpentine belt, which drives many other accessories as well. It's not uncommon for an automotive HVAC system to go 15 sometimes 20 years before it starts to become low on refrigerant if the maintenance has kept up and what not. Does that theory hold through with modern residential HVAC systems when compared to the 1950s and 60s large, inefficient yet bulletproof HVAC systems? As always keep up the good work!
First let me say I know nothing about HVAC systems. I am retired and basically I watch these videos for entertainment . I like learning new things and this is a good way to do it. My question “and this may show my stupidity” but when is the evacuation of a system necessary. Is it only done when components are changed out or at the initial installation I love watching your videos so keep them coming. Thanks
Anytime the system is opened to air you must evacuate it before refrigerant can be put in. Air and moreso water in an air conditioner will cause issues. Air is non condensable and will raise the high side pressure and can cause something like a vapor lock where the air blocks liquid refrigerant flow in the condenser. Water can freeze in the system causing all sorts of problems.
@@Redtooth75so does that mean when tech tests for refrigerant change and it’s low he has to evacuate before adding refrigerant ??
@johnwhite2576 most systems will have service ports where you can attach a hose to add refrigerant. So as long as there is still pressure in the system you can add refrigerant without pulling a vacuum. But some systems cannot be accurately with that method and the charge must be weighed in. In those cases all refrigerant must be pulled out and the entire charge is weighed in.
This helps out so much. I just started to learn about this and you explain it so well. Very understanding
Wow, excellent video. Thank you for the intuitive video! I should have watched this video before my first system evacuation lab.
Nice Brian.... same micron guage and procedure I use!
Although after evacuation I always pre charge the line set and evap coil with a little reefer before opening the service valves.
We once ran a vacuum pump for 4 days. Broke the vacuum with nitrogen once a day and did about 6 oil changes on the vac pump to remove moisture from a system. That pump still works, and so does the system but as you said, very time consuming and can’t be good for the pump
Customer's system is happy though
This is collegiate level information...presented in a professional, clear way!
It's actually elementary level information. Day one shit!
@@ericgass9790 Elementary..."I do not think that word means what you think that word means."
It means exactly what I think it means.
Thanks!
Bryan is such an excellent teacher!!!
Blessings!
Best video ever. This guy is from another planet. Kudos
Straight to the point - well explained. Appreciated!
Napakahusay at detalyado nang iyong paliwanag👍
Hello,
A micron is a measurement of distance, pretty much it will tell you how close you are to a perfect vacuum. Great video. This channel is absolutely a great contribution to HVACR community.
To be more accurate, the microns used in HVAC are “microns of mercury.” A micron itself is a thousandth of a millimeter. A micron of mercury is a measure of pressure. It’s so small that traditional bourdon tube gauges aren’t accurate enough to measure it. Digital vacuum gauges actually measure temperature and convert to pressure.
thank you for sharing! You're very knowledgable. I could never make use of this information but my grand children will as they are in the trades.
Best video i have found on pulling a deep vacuum.
Wow! By far the best video on this subject, thank you!!
Back to this amazing vid again, had a question. How do we vacuum a working AC system that's suspected to not cooling properly?
Great video Bud thanks for all that time you spend on doing this videos
Excellent presentation. Clear and concise. Thanks for sharing!
Well I presented this system to the managers yesterday. This will be upfitting 20 to 30 techs.
WOW! Perfect explanation!!! I will be installing my Airhandler and Condenser in my Mobile Home!
Just in time:)
Amazing video. Easy to follow and fun knowing what is going on with each step. That said, I doubt I could do this.
just watched this video again. Such a great step by step video. Thank you
Wow.. very comprehensive. Worth a replay.
I now have a question..
If you are pulling from both sides with two hoses to the pump, where should the micron vac that's be placed and will it over estimate the depth of the vacuum ?
Ahh I just heard the answer at the end on second play..
Thank you for that video! This is deep knowledge and great quality product. Please keep going. And hello from Russia!
Great video. I just had a technician come out and change my liquid line filter that was leaking and I noticed he didn’t pull vacuum. When I asked why he said you don’t have to when it’s a quick job. System is 10 years old will this damage my unit ? He added refrigerant check the pressure and got paid. A/c is cooling great but now I feel like it won’t last. Thoughts?
this channel is a blessing, thank you, bro!
This is the greatest tutorial of HVACR video. Thanks.
Very detailed and very good, however, way over the top. Any day I'd rather have too much info than not enough, and for this I applaud you for sharing this! You are truly an AC expert. For most folks, this job really isn't super complicated; don't be scared to do this yourself. This may be good info, but you don't need to be super scientific about this unless your installing a very expensive commercial system. Anyone can do this just as well with a set of cheap gauges 1/4" and a small vacuum pump, albeit it will take more time.
I’ll admit it, I haven’t used nitrogen to pressure check a system since I’ve gotten trublu hoses and a vp85 vacuum pump because I can tell on a residential split system if it is leak free in a matter of about 1 minute instead of 20 to 2-3 days. The other thing that has screwed with me before too is the fact the nitrogen is not as inert as people think and if you pressure test a system overnight and it’s colder the next day you may waste a significant amount of time tracking down a leak that doesn’t exist.
I wish I could get the guys at the company I work for to understand this. I only do ductless systems. Nobody uses a torque wrench, nobody pressure checks to the right pressure and evacuations are just a joke. I’m the only one that installs and evacuates properly. The funny part about this whole thing is that I’m not an HVAC guy. I’m a licensed electrician who installs ductless units better than all the HVAC guys. I’m so tired of theses guys doing the customer wrong that I’m seriously considering going back out on my own. Thanks for all the good videos.
Hi, continue to to do your best best it will be rewarding.
I've allways done my way toward a big achievement
I've learned all by myself
All the best
Good on you Mate
DomIJ
Great video! Definitely going to be sharing this to my co-workers. One question sir, At the end of the video when you are pulling with 2 hoses and you hook your micron gauge into the service port on the valve core removal tool do you need to take that schrader out of there so you're micron gauge can read properly?
Great lesson! would you recommend running the evap motor to introduce heat to aid during the vacuum process?
Great video but question about if there is dye in the system and how does it affect the hoses and vacuum pump?
Yeah, I've always wondered about pressurizing a line set that has a 'Hard Shut Off TXV'. How does the pressure get from the high side to the low side. Now I know. Interesting. Thanks for the info.
The liquid line appears to have a compression fitting, instead of a common welding joint. Is this a special fitting?
Good info there! When it's time to replace my 1/2" Appion vacuum hose I'll try the blue ones.
I forgot how much but when I bought my appion half inch hose the difference was significant. Regardless it will take years for a hose to take a dump if taken care of
The appion ones are much better. That's what I use. They will last forever if you take care of them. Just replace gaskets periodically and lube them w vac pump oil before you hook them up
Great video as always. Really appreciate your knowledge in time ..quick question in this video you’re showing a female a female quarter inch fitting hooking to your micron gauge. I’ve been looking all over for this fitting but cannot find it. Is there a certain description for this fitting. thanks again. You guys do a great job educating us HVAC guys good thanks
Detail explanation on vaccum good this is very helpful for hvac service
Nice Video...clear voice and the the tutorial is easy to.understand. Thanks very much😀😀😀
Very nice video and well explained , I would like to see - how and when one should vacuum one side of the unit.- High and low side of the unit.... thanks if you can and thanks even if you don't want to... thanks again. you do good work!!!
Really informative detailed videos, thanks , as with all your videos.
I wish I could get people to follow these procedures at my job it’s insane how many guys are doing these simple steps wrong in the field !
Great video great information but I do have a question tho why did you open the liquid line first instead of the suction side don't you want that oil to suck right back to the compressor instead of traveling all through the system and back to the compressor?
How necessary is it to be this thorough on small systems such as a refrigerator?
Man you are a Monster no words to describe such a Great Wisdom on A/C matters God bless you ur team etc etc Excuse my broken English
Thank you. Better than any college professors
Why did you keep the pump running when the core removal tool was valved off and you were doing the decay test ?
Awesome videos. I heard you say in one of them that you were in Florida, so I went and looked up Kalos Services and got excited when I saw you had a 352 area code. Unfortunately , you don't service my area (Citrus County). Bummer. But again, awesome videos! I certainly appreciate all the information.
You guys are on a roll.
God bless you and your channel honestly, and everyone else whos involved. Thank you.
Not all heroes wear capes 🔥✊🏽
Is the unit on or off. Has the unit been evacuated first. I am not sure what you did before you hooked the hoses. thank you for the video.
As always, great job. Thank You 🙏
In a system change out. Would it not be right to also change the evaporator coil?usually when the condenser has to be changed, I would think it makes sense to also change the evaporator coil.🤔🤔🤔🤔🤔
It's nice to here someone with knowledge and Intelligence !!