How to Braze Air Conditioning Copper 

Good Job 👌🏾

I did this today. Brazed my refrigerator compressor with only the info from RU-vid videos, brazing rods and a Mapp-pro torch from Lowes. Turned out perfect.

Just started as an HVAC installation helper and plan on moving up and making this a long term career. This video is such a huge help!!!!

I'm in school for hvac and I gotta say these videos are essential.

Within 3 seconds of your video, I saw "flow with nitrogen" and you have just earned my sub. Nobody teaches that, the company that hired me from school had nobody doing it, even the "masters"... The company I'm with now, crazy. You KNOW your with real masters or listening to one, when they tell you this right stuff to do. Loving the field, and loving how much I'm learning from the true pros in the field. 3 years I'll have mastered the trade too. Guaranteed.

Thanks. This is a quick and clear tutorial. It surprised me how much harder it is to braze in the field in awkward positions, rain, and wind compared to in the lab.

one of best video to technicians related to hvac brazing work

Don't be intimidated. It's not that hard to learn. All of my techs learned it in a matter of minutes. I've been in business for 33 years.

Let us hope the guy before me saw this educational video and did not forget to purge, flow and melt the seal around the factory valves... do it right once and build a little confidence. Thanks for all your great videos about hvac service, it gives tje senior technicians a place to go and wind down after a long day. Two years, two months, two years, two months...to go. 👍🏼

This channel is getting better and better, i like it thanks

your voice is very engaging, explanation very clear, your English sounds beautiful

Loud and clear speech that I can understand easily 👍

thnx so much I've been working for LG for almost 2 years and im just now getting into brazing and this video was perfect and simple to understand great stuff will subscribe 🤘🤘🤘

Excellent job explaining the process!

Another awesome training video, Thank you

Exactly what I was looking for.

While soldering/brazing copper when you think you have it clean enough clean it again! This from a 30+ year tech.

Thanks so much for everything that you do, God bless you every minute of your life.👍🏻🙏🏼

I have found that selecting the correct tip size and setting the acetylene and oxygen pressures correctly makes a big difference in bringing the joint to temperature and getting a good braze. If the tip size is too large or the gas pressures are too high you can easily overheat the metal and melt it. At the opposite end, an undersize tip and low gas pressures may take a long time to get the joint to temperature, if at all. A poor braze will result that may have leaks.

Good job 👍 and great exploration

Sharing this with the newbie for sure thanks again for a great video my guy 👍👍😎

nice video, a few years backI installed a unit for my son......while in HVAC wholesale asked 2-3 different techs about nitrogen trickle....all said they never bothered....only one said he would use it on large refrigeration units only....can see why things dont last,everybody just doing whats faster and easier rather than better.

Excellent tutorial!

lol, I am watching this because I want to work on my DIY

Another great video tank you very much.

Listen. All of this information is absolutely true, and well explained, and all of it is correct. But I promise: this is super duper easy. Just take your time, preparation is everything, and you'll get it.

Outstanding video. Thank you

GREAT video!

Good teacher.

You are great teacher I like all information from this channel

THAT'S COOL. AND THANKYOU FOR ALL YOURS TIPS.

Thank you for suggesting that a DIY'er not attempt this. As a DIY'er I accept your challenge. I've been emboldened to find me a torch and a bunch of copper tubing before I set my sights upon my LG Refrigerator.

To create a nice fillet apply your brazing alloy just after you remove your heat, it will quickly solidify creating that nice fillet at the joint boundary. Penitration is the key, but the fillet is just a visual conformation that you have a good quality joint.

Been in the trade for 7 years plus and just started brazing. Been wanting to have that braze time but never happened til now except for a couple times. Purposely trying to fill in gaps on scrap copper, put in different positions and use various sizes

Really good video,👌 👍

Another side note for this video is that WESTERN ENTERPRISES makes a very good Nitrogen regulator- the VN-500 that actually has Purge/Flow/test pressure settings exactly made for brazing properly. I also use their internally regulated Oxy Acetylene regulators as well and they are amazing.

Thanks for the video =)

Very good video

Duidelijk filmpje. Dank!

great information

Good videos!!!!

Thanks 🙏 a million you’re dope!

Thank you!!!

Super video

I'm sure there are talented DIYers out there that can handle this type of work. With some practice, anyone can blaze copper tubes. Safety first, of course. People often learn from mistakes. Don't be afraid if you make mistakes.

So many fields to get good in my case

Awesome 👍🏼

Thanks so much for the great explanation. I've never done this before and, despite the warnings, going to attempt this on an inexpensive window unit for my van. I've tried to find an AC tech in my area that will do it for $$ but there are no takers so it's time for me to acquire a new skill.

Good info

Thanks

I learned at the top company here , to soft solder , I know how to braze but I still love soft soldering most my joints if it’s not inside the condenser

Thank you

thank you

Brian, You Rule.

Thank you for the great video! Question for all you pros outthere; how far away do you hold the flame from the copper? I understand there are many variables to this question.

Awesome

Wish they teached this to me at my trade school

Great video what regulator u recommend to get and allso for the nitrogen and the acetylene tank regulators to??

Great vid Brian I am going to share with the whole company. It makes me crazy to watch someone not deburr a 1/4” line after cutting with a dull tubing cutter that feeds a 15kbtu fan coil off the BC. What’s the actual diameter, 1/8”???? The other thing I noticed, is how much quicker and deeper the vacuum decay test works on a system where nitrogen was used. Also, look up the size of the stainless screen used on all these Mitsu strainers-minuscule. Can’t afford to have garbage in the lines.

Thanks! great instruction. Do you have a pdf for the graphic at 6 seconds? or can you tell me where to get it?

I am totally going to braze some copper stuff this weekend, then try to see what pressures my joints fail at.

Nice

awsome

thanks for this nice video. just wondering can we use yellow bottled mapp gas for brazing ? i used it for water pipe soldering, since it got temperature of 3700, should be enough for blazing just a little slow , right ? thanks

Hi, Is there any videos on brazing medical gas copper pipes. All principiles are mostly the same but it would be helpful if you guys can also include it along with your HVAC. This will immensely help.

Great video. When I’m swaging a pipe, should I aim for a real tight joint? If it’s to tight will filler material still be drawn into joint? Thanks for video. Only one I found that mentions that joint should be tight.

What do you think about diversatech brazing gauge that has 3 settings off purge braze

Where can we get the cone tip for nitrogen flow for open lines that has no valve and cores ?

When I clicked on the video I didn’t see what channel it was coming from and I assumed it was from the engineering mind set by the image 😅

Fun story.... I'm just a home owner that read the install manual for our new AC unit. HVAC guys come out to install....I ask them...are you going to flow nitrogen while you braze? Installers said I've been doing this for 20 years and never heard of that. Company owner came out to do the install and show his installers how to do it.

I’ve seen HVAC guys replace compressors on a few units and I’ve never witnessed them purge the lines with nitrogen or evac the system and pull a vacuum. Typically they change the part and put the refrigerant back into the system and they are done.

4:05 why does it matter if you use a striker to light your torch?

I have a factory joint in a 4 year old unit 410A heat pump that has a small leak. Can this be repaired with Stay Brite 8 or does it need to be taken apart, prepped and brazed?

"Don't use this as a DIY tutorial." Me, using this as a DIY tutorial, "And I took that personally."

Yeah I know this question has nothing to do at all with the video but I do want to know about the phosphorus rods see I make stuff out of scrap copper and want some thing to match and I intend to use a butane torch will this be enough heat and if not what type of product could you enlighten me to Thank you in advance

What is the best rod for vechicle air-conditioning oxy-acetylene gas welding with a t joint

I like the tools to other country unlike in the philippines no tools like that you are unit like portable acetelyne..thats why my ambition is to go other country to work and buy all good tools for aircon repair and service.

THOSE hvac HAIR CUTS :)

Молодцы😇

Hi Bryan, do you recommend using Stay-Brite 8 with Stay-Clean flux instead of brazing? So it not need of purging nitrogen? Hope to hear your thoughts.

Awesome video with great info. One question I have is "Is there any health effects (toxins) to the silver phosphorus solder like compared to electrical soldering(cadmium, lead, etc?)" and if so will face masks/filter be required soon like as in electronics area?

Solder with stay bright 8 and stay clean

Has anyone used the Diversitech nitrogen purging tool to flow nitrogen during brazing? I'm wondering if it's a good buy.

Harris brazing guide is gone now?

I'm specifically looking at these videos as a refresher before I DIY. My problem is that the reputable companies are solid booked 3 months in the future and aren't taking new customers. The ones that have time aren't willing to do what I want because all they'll get paid is labor. No commission or markups because I already bought my supplies. This isn't rocket science. Purge, Braze it, pressure test, pull a vacuum, charge it, check subcool. Plus, I get to keep the tools I bought for future projects. It's a win-win. I really hate the elitist mentality some technicians have, like other people can't read, watch videos and learn. Guess how they teach people in HVAC school? A lot of reading, watching videos, and a lab to practice what they're learning.The tip about practicing on some copper pipe beforehand is really good advice and a good confidence builder. I've got Argon which I'll be using to purge, since I already have a tank and regulator for it. Another cool thing to try if you like welding is TIG brazing. Check out This Old Tony's videos.

what about stay brite8 i see lots of people using it ??

My reason for watching this and other utube video is that I have a ac unit and it want to turn it to a heat pump and add a water transfer unit to heat my hot water as well as one to transfer heat from and to well water and I don't want to buy a new unit starting with adding a reversing valve and diverting valves to switch from one to the other I'd rather have a professional do it but they don't make as much money per hour as they do on commission selling a new one

what about using CO2 instead of nitrogen? I could get n2o, but I already have the other.

I am retired HVAC tech, I did just trouble shooting and repairs and replacements. When soldering the dryer i ran the heat from the tubing side to the dryer and never had a burned dryer. As for the service ports again never used a ret rag or anything.. As for silver soldering, back then there was a 3 ton york unit that whistled. My boss called me in and told me I had to add mufflers to 4 units at one house, I said your full of shit.. But he was right.. I used turbo torch with a number 10 tip and sli fos 15% .. Also if I ran into different size copper and did not have the adapter so ( and not proud) put the tube inside and crimped it and filled in with the sil fos..

Had to light a torch with a grinder and a peice of unistrut because someone jacked our striker. Grinder and the strut make enough sparks that my partner could light it

💯👍

Just use Stay-Brite 8 and Stay-Clean. Most people who braze don't use nitrogen, resulting in soot in the lines.

Need more emphasis on having a fire extinguisher standing by!

Gotta use brazing flux, will make the whole brazing flux fool proof. That "draw in" is specifically called capillary action and the flux is the one which is responsible for assisting in "draw in" (capillary action). Never rely with the incorporated flux in the brazing material because it sucks, always use a brazing flux designed specifically for the metal(s) in question.

Question: Does the filter line dryer catch all the oxides from a vacuum comming from the coil braze, if you don't flow nitrogen from when you braze it? Some techs tell me this. Just for my sake, I want your answer.

So what is the purpose of brazing vs soldering? I've heard you are supposed to braze flammable gas and O2 lines inside buildings so the joints won't fail in a fire, but these are outside.

In bahrain middle eas i m going training they first flow the n2 after brazzing and they cut cooper tube 4 inches and they chek the cooper tube from inside brazzing rod melted shoud reach into the inner side male and female joingts. Not all technians done perfects lotts people here in bahrain faile e. R. L. Exams

I gotta say that wet rag sucks cleaning afterwards, tradituinal wet rags cut to right size works the best, wet rag stuff is really good for watercooled like trane tiny ptacs reversing valves, txvs etc..botgerwise I wouldn't use that sruff on anythibg large

Detail no given below.

OK.what gas and which torch using for brazing.How much it cost.Reply.