Brazing Training for HVAC Technician

In this HVAC training we do a intro and refresher into brazing and soldering. HVAC welding is a critical skill to have as a hvac technician. I discuss regular copper brazing, steel to copper brazing, and aluminum soldering (aluminum brazing). The critical skills to develop are proper cleaning practices and temperature control. All service technician should develop their repair skills by improving brazing practices.
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[@HVACTIME]

chilleracademy.com/p/intro-to-chillers Get support today.

[@israelperez4260]

I am always amazed by how some professionals are willing to share even the basics of the trade. I am ever thankful. Great introduction video and great instructions! Keep up the good work.

[@derrickenbuenosaires]

Nice tip on burning through the copper to get an access fitting on there but it is pretty tough to eye out the hole you need. I usually pressurize the system to about 70 psi or above 50 and below 100 psi and drill through. That way your shaving will blow out. It isn't ideal but sometimes you gotta do what you gotta do and wear eye protection ! Them shavings come out flying at that pressure. Take care Yah bless.

[@FrostHVAC]

Per refrigerant manufactures, oxidized copper mixing with these newer refrigerants now create a detergent like chemical that causes more damage. It amazed me lol

[@dioncurtiscurtis3188]

The best example iv ever seen was brazing with out the rod in the flame. Literally just the heat from the pipe should melt the rod

[@randomrefrigeration4564]

Really great thing you are doing by instructing these apprentice Taking time out of your busy schedule to pass on knowledge As you and I know we do not have enough new techs coming into the HVACR trade. All it takes is one look at Indeed and you see the massive shortage of skilled techs just by the shear volume and amount of positions available and most for immediate hire. You win the Walter Payton award for hvac lol if such a thing existed Thanks

[@HVACTIME]

Id like to thank my friends and family who supported me to get here! Id also thank the award academy....

[@bunnyman6321]

​@@HVACTIME What's the award academy?

[@qua7771]

Just the thorough tutorial I was looking for, with no wasted time. I'll be practicing at home, and will likely cut the joint open afterwards to see.

[@HVAC544]

Never used oxy to braze everyone around here uses turbotorch. An A14 has got me through pretty much everything; throws off a lot of heat really got to be careful. Can see the advantages to oxy in a service setting when brazing components in a tight area.

[@mbahcarrier1629]

success always for "HVAC TIME" Indonesia is here

[@abdel-hadikaddourn2bricola725]

سلام عاليكم و رحمة الله و بركاته ، أخوكم متتبع من قلب الجزائر ، شكرا علي الفيديو الرائع

[@HVACChillin]

🤙🏼 Your techs receive some of the best training. Great job.

[@calex9398]

This brings me back

[@scottkrisher2215]

I’ve learned that a slow circle pattern on both vertical and horizontal braze joints gives you 100% penetration to pass a test.

[@al.e123iis7]

Best teacher ever man... thank you for posting ur videos

[@rodgraff1782]

Why are you letting some of these students braze without goggles? Have you ever had filler pop and get into your eyes? Easy way to loose an eye. Some don’t even have gloves. Hope no one gets hurt. I guess they will have to learn when they get burned by the torch or a piece of rod. I taught Union HVAC service apprentices for over 30 years, and would have been fired on the spot, by the coordinator, if he ever caught students brazing without proper protective gear. Guess you guys don’t teach or enforce safety in your program.

[@rodgraff1782]

😊

[@jwessonsr7503]

3 flames are... 1, 2, 3, by feather carbonizing, neutral, oxidizing...never heard them described as mentioned. Carbonizing=more acetylene than oxygen... Neutral=equal parts acetylene & oxygen... Oxidizing=more oxygen than acetylene

[@Jonesy1978]

Agreed

[@Kevin-mm6xm]

Still searching for an "ionizing" flame. Maybe he means "oxidizing" flame? Naw, he's the expert on brazing....:)

[@fsoileau]

I think you are correct, a plasma cutter is a kind ionization .

[@Kevin-mm6xm]

@@fsoileau I was making fun about it, but to be fair, he does call it oxidizing later in the video. :)

[@tmmyjay]

Did I miss the part where they discussed which brazing rods to use?

[@kancaputra4896]

Great video really appreciate a person who willing to give knowledge about welding in hvac Maybe you can give the tips or theory about welding in aluminium coil or microchannel condenser

[@jasonjohnsonHVAC]

I like to have the orange ( 56 % ) brazing rods on my van for just this sort of thing. I like that they have the flux built into the rod. Definitely very important thing is TO CLEAN THE PIPE AND PREP IT PROPERLY. DE-BUR, SAND THE PIPES FOR BOTH CONNECTIONS AND USE NITROGEN PURGE DURING THE PROCESS. Whether correct or not, i like my rod to follow the torch tip. Torch leads, rod follows. Please correct me if that isn't correct. It hasn't let me down ever, but i always like to know the correct way

[@HVACTIME]

Sounds like it works well for you. My point in the class was not letting yourself get tricked into thinking your good because your flame was on your rod.

[@jasonjohnsonHVAC]

@@HVACTIME you did an excellent job. I was actually curious as to your input on what you think of what I said. Do you have any advice or constructive criticism. I generally want to learn and do tasks the correct way. You are a great instructor and mentor to the next generation. Getting them started off the right way...not like a lot of us who started the wrong way and had to learn the correct way.

[@derrickenbuenosaires]

@@jasonjohnsonHVAC Just to add my two cents, In my opinion you need the torch to correctly pull in your filler material into the female joint. He was stating this at 27:00. Your filler material will follow your torch just don't go overboard or you'll have all your material within the pipe lol usually with BPHE's I will use this exact method of heating the copper first then the steel and the filler material will draw into the joint, afterwards you can cap off the top. BTW 56% rod doesn't even exist where I live. I've been getting away with the harris blockade rod and some stay-silv flux. Does a super job with dissimilar metals. It sais it's for brazing copper to bronce but does a good job with other metals as well. I would urge you guys to give it a practice on some scrap and see how it welds.

[@kellyhoneyfeloncdljourney]

Awesome teacher

[@DWAYNE2ism]

great video I prefer air acetylene torch

[@robertpeters9438]

You are using adhesion to wet the metals and capillary attraction which is cohesion of the solder attracting to itself to pull in and fill the void.

[@raindogs451]

MAPP 700 degrees. Turbo torch 3400 degrees. Oxy/ acetylene 5500+. Stay Bright liquifies 500 or so, Dynaflow 1300 or so. Copper to copper, Stay Bright is the champ. .

[@scottkrisher2215]

Bucket of water is always important with wet rags

[@jameshendry9906]

This is real cool I wish when I did my brazing class we went this far. My class only was a few weeks and only went over the basics. Can you recommend a good torch set up I have a turbo torch set up but would like to invest in a oxygen and acetylene setup.

[@thesilentonevictor]

Great lesson 👌

[@DWAYNE2ism]

only when brazing expansion valves I oxygen and acetylene to get in quick in and out

[@drhvacr9477]

The phosphorus in the silphos reacts with the steel and causes failure

[@rodgraff1782]

I think that is BS. It would have been discontinued if that was true. I used it for 45 years and never had a failure.

[@brandonskater911]

What size rosebud tips are you using? I could use one on my Victor kit. Thanks for the great information as well!

[@TropicBreezeRealty]

Is it possible to use a mix of argon and co2 shielding gas instead of nitrogen?

[@Brokentwobutton]

What risks do we run burning in a tap hole for stems and tubes? I've always drilled a piece, separate from the circuit to avoid introducing chips, and it adds a couple extra joints. My concern seeing that technique is weakening the wall we braze the tube into. Is that a non-issue due to material we add? Are there other concerns besides that and using nitrogen? The demonstrated way would definitely save me time.

[@HVACTIME]

Its possible but its been a standard industry practice. Ive never created a failure.

[@VTdarkangel]

I personally have drilled holes for taps, but I will admit that I use some techniques to prevent chips in the pipe. I always have a positive nitrogen pressure to blow out any chips that could get into the pipe. The second is not so much of a technique, but the nature of the systems I work on. I work on large commercial refrigeration systems. These systems have filters everywhere that are routinely replaced protecting valves and compressors.

[@5822huron]

I need tips in gettin under the suction line on a compressor. I did by a captain hook. But sometimes i struggle. I really need any tips you have. Thx

[@mbahcarrier1629]

Please describe for additional ingredients when brazing

[@2bnax]

13:46 SAME FLAME AS ...21:10 ONE IS CALLED NEUTRAL , THE OTHER IS CALLED REDUCING

[@raindogs451]

Soft soldering is SUPERIOR to brazing if bursting strength is the issue. Sure, plumbers use soft soldering, but it is a common misconception we braze because we work with 600 psi. Take a one foot piece of ACR, and braze a cap on one side, and a male adapter on the other. Then burst it. To begin with, BOTH will stand up to our pressures. But where you burst will be near the cap. Your 5500 degree torch weakens the copper. It will burst around 2500 psi. Feather in a patch and burst it again. It will still burst near the cap, but now around 1900 psi. Stay Brite is a SUPERIOR connection for both tensile strength and bursting strength.

[@rodgraff1782]

The only problem with stay bright # 8 is it won’t meet a lot of specifications on large commercial jobs. Then there is also the chance of getting that flux in the system where it gets in the oil and makes it acidic, which can takeout the compressor windings. I’ll admit I have used the stay bright on quite a few instances. There are OEM’s like Liebert, who install their expansion valves with it. I have also used it where I have a real close connection to something I don’t want to get too hot, such as a sealed sight glass. It’s ok, but there is much more prep, and cleanliness is critical. Good thing is it won’t form scale, and you can use a simple map gas torch.

[@HVACRTECH-83]

We don't braze because of strength of joints. We braze because it's code first off, and that's because of the liquidity of phos copper vs any soft solder available including stay rite 8 which is the highest at 530 or so

[@quinnmath4722]

Brazed in 12 Condensers today.. had 1 squeaker of a leak .... tsk tsk im sad

[@mikewhittaker5984]

Heat is not needed for capillary attraction

[@Rado88]

You are saying to solder with 56.% silver solder?

[@HVACTIME]

Yes

[@cuongvochi3535]

What is the soldering iron to solder copper to iron? Where did you buy it, I want to order it to ship to Vietnam to use

[@aaronxu6120]

we are brazing alloys factory, maybe i can help you.

[@cuongvochi3535]

@@aaronxu6120 Hello . Thank you for taking the initiative to contact me. Currently I need to buy iron and copper soldering iron as shown in the video, can you give me your information so that I can contact you privately?

[@jnewv]

Do not mix 15 and 56 if you end up with a leak there you’ll never be able to fix that leak

[@seanflame2975]

I invented a machine that uses air instead of oxygen acetylene, air flame machine

[@miguelanacleto2556]

What’s up man , I live in Buda and I was wondering if I can get some training from you. I’m willing to help you on weekends for free I just want to learn the commercial side if that’s okay if course

[@HVACTIME]

Send me an email [e-mail]

[@Jdog651]

Were are you guys located?

[@HVACTIME]

Austin Texas

[@sheldonlionel8694]

I thought I had floater in my eye

[@damnitdang]

Most time these new guys just work too slow and can't multitask. And eventually they become techs and they still suck throughout the years. Let them heat up the material first.. they're all pretty much cold brazing

[@rodgraff1782]

Yea a lot of people use the torch to melt the filler, instead of the thing the fitting hot enough to melt the fitting. It looks like candle wax dripping on the outside of the fitting

[@damnitdang]

@@rodgraff1782 I tried to teach newer guys to braze scrap coppers together, so they'll get a good visual on the heat. And can repair a hole if it happens. Then they'll know when to back off the heat. Or distribute the heat further down a pipe where it's colder