HVAC Brazing In The Evaporator Coil, Filter Drier 🔥

In This HVACR Training Video, I go over The Process of Preparing and Brazing in an Evaporator Coil from Start to Finish. I show the flowing of Nitrogen, How to Shield the TXV and Bulb from Heat, and What Pressure to Test the Coil up to. Supervision is needed by a licensed HVACR Tech while doing this as Experience and Apprenticeship garners Wisdom and Safety.
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
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#hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #lineset #brazing #braze #copper #tubing #refrigerant #evaporatorcoil #coil
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Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal.

[@acservicetechchannel]

Tool List- www.amazon.com/shop/acservicetech Support- www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Here is a link to the Nitrogen Flow Meter amzn.to/2brvoBg Here is a link the Nitrogen Regulator amzn.to/2bXdR5f Here is a link to the Air Acetylene Torch setup- amzn.to/2aQalsb Here is a link to the 15% Silver Brazing Rods- amzn.to/2gVLyLc Here is a link to the Appion Valve Core Removal and Vacuum Tool- amzn.to/2t5ogIb Here is the link to a 5 pack of Uniweld Hammer Swages- amzn.to/2uqWHqs Here is a link for RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn Here is the link to the pack of 25 C&D valve cores- amzn.to/2J1lurm Here is the link for the C&D Valve Core Wrench, Container, and 3 valve cores- amzn.to/2EVGkps Here is the link to the Yellow Jacket 1/4" by 1/4" heavy duty hose straight- amzn.to/2umtcod Here is the link to the CPS Vacuum Micron Gauge- amzn.to/2v1nM3O Here is a link to the JB 6 CFM Vacuum Pump amzn.to/2nqbvo8 Here is the Link to the Appion Blue 3/8" to 1/4" Vacuum Hose- amzn.to/2uYlVyc Here is the Link to the Appion Red 3/8" to 1/4" Vacuum Hose- amzn.to/2uYg6Ro Other tool links can be found in the video description section. All of the ACSERVICETECH Playlists- kzbin.info/door/OZR-1IqsAer9wzlvFgb4mAplaylists?view_as=public Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal- www.amazon.com/shop/acservicetech

[@Raverdelight84]

Been HVAC/R certified since 2003 with updated schooling for 410A, but still coming back and watching your videos to learn new things or to get familiarize myself with new technics is never bad.

[@fabianvazquez5259]

Love the videos!!! I’m a beginner in the HVAC industry it is nice to have a channel the refreshes all that is being taught at school in a real time practice !!

[@abaidaramex2818]

I watched more then 20 videos about brazing and i give rating about then this video is on TOP of all which clear my all answers Thanks for have such nice videos

[@LexVance]

Awesome video! I've been replacing 2 to 3 year old leaking Goodman coils like crazy. I recorded 2 coil replacements on my channel. All the AC units are the same on the property so I can't record all of them because it'd look like the same video over & over. 👍😂👍 Love your work man!

[@acservicetechchannel]

Thanks a lot Lex! I appreciate you and your channel! Great videos! 😁

[@phillipjoy8191]

Thanks for your reply. I have been using Staybrite 8 for 38 years on my new installs, I don’t want to over heat those service valves.It does take more time to use .You got to make sure it is very clean and tight joints.You have some Great videos, I tell a lot of people about your channel.Great Job

[@acservicetechchannel]

Thanks a lot Phillip, I always appreciate your comments!

[@Gasparifanboy]

Do you think staybrite is ok?? Aka any issues with flux getting into the system?

[@brianbrittain84]

I love your Channel! I went to HVAC Vocational School my Senior year in High School & then went into the Trade, on & off for about 9-10 years, I'm getting back in after like 2 years away & the Videos are a great refresher- thank you.

[@acservicetechchannel]

Thanks glad to help Brian!

[@douglasmccoy2571]

All I have to say is thank you for your detailing and thorough videos. I’ve learned a lot from my dad and hands on and reading a manual about an ice machine lol but ur detailing walkthroughs really help out Lot.

[@acservicetechchannel]

Thanks a lot Douglas!

[@bigant8231]

I only watch you and word of advice tv..you guys are the best

[@acservicetechchannel]

Awesome and thanks for letting me know!

[@jackpast]

Another great hands-on video. Great job, Craig! Thanks!

[@acservicetechchannel]

Thanks Jack!

[@samuelvalenzuela4541]

Look a this technical expert with great skills, hard to find a handyman like him

[@mrnoodle43]

Great instruction all around !!!! school really stresses the importance of removing that bulb before brazing.. If it’s not removable as noted wouldn’t it be better to make the bulb removable..preventative measures just in case..also does it matter if we worked the brazing from the bulb out to dissipate the heat fr the bulb a little more. Thx again your work is impeccable. Awesome to watch.

[@yonofui9682]

I did a job like this one watching this video this guy is really good teaching keep it up with the video sharing man you rock

[@acservicetechchannel]

Thanks a lot yo no fui!

[@josephpuchel6497]

Hey I recently subscribed but been watching your website tutorials for awhile. You are very thorough. I also just purchased one of the books. Have you ever made repairs on a coil that has leak or two. I would attempt repair because coil is all copper and rest of unit is in excellent working condition it’s that the coil is I believe discontinued. Thank you again excellent tutorial

[@jordantyers119]

Hey man, you should wrap that drier with your rag. The heat causes the decassent to break down and clog txv screens, cap tubes, etc.btw great videos great content. It’s good to see our trade get passed on👍🏻

[@UltraHydrophobiccoat]

Jordan Tyers soft soldering plus heat block putty will be better

[@TheDave5619]

Great video as always Craig! But I had a question. When brazing the filter drier, is it preferred to use a wet rag to prevent the desiccant in the filter drier from being damaged?

[@pjip]

Great video as always. Quick question, why arent you covering the filter drier with moist rag or paper towel?

[@jimtalor7971]

Very good informative video. The tech who installed my system over three years ago didnt do half what you did,like they were in a race. Well my evap coil is now leaking and another company wants to replace it (warranty part} but wants 1.5k for labor etc.Im in Houston,does this sound right.

[@consumersgasman8376]

best series of videos ive seen, was wondering should drier not be protected from heat during brazing ? thanks

[@Sctronic209]

Really enjoy your videos.

[@acservicetechchannel]

Thanks HVAC1 !

[@shawnlatif1369]

You are the best. Great job 👍thank you for all the info.

[@tptm100]

I heard that a Turbo Torch gives off more heat to surrounding area and Oxy/Acetylene has a better control for brazing. I would like to get one of these Turbo Torches too.

[@DomReacts]

Yeah I’m just used to oxy/acetylene

[@pnp8849]

Does install filter inside make it performs better since it not subjected to hot weather? I'm wondering if it might help remove some heat. Awesome videos. thk

[@chenchris7576]

Another high quality video thanks

[@acservicetechchannel]

Thanks Chen Chris!

[@bmorekairful]

Best teaching vids online. How do you size liquid line filter driers. Is it by tonnage. Can't seem to find a straight answer. Thanks.

[@acservicetechchannel]

You could use this as a guide pages 12-15 - sporlanonline.com/literature/international/uk/40-10.pdf

[@pepethebull1]

so are you flowing nitrogen when your brazing the filter dryer ? love the vids

[@jonathanraul4086]

Thanks 4 a another great video

[@acservicetechchannel]

Thanks Jonathan!

[@quocbui5012]

Great video, seeing that wet rag was applied, but it still sees black marking on joint after cleaning, is that oxidation marking? And could you tell me the kind of filler which was used in the video

[@mahmoudibnemir8704]

Great video. Which Turbo Torch tip did you use for this brazing job A-5, A-8 or A-32? Please let me know and thanks.

[@jpechacek80]

thanks! One question, Is it beneficial to use flux for brazing?

[@alarmedmutant]

Was the vertical tube too long? It looked like the vertical tube put some pressure on the joint and evaporator. Just trying to learn, thanks!

[@alarmedmutant]

Nevermind, I saw the curved top of the pipes.

[@andygonzales9469]

Great video.

[@acservicetechchannel]

Glad you enjoyed it

[@MiiSbk]

Just found the channel today (and subscribed). Really interesting to watch, although I don´t work on brazing and plumbing.

[@acservicetechchannel]

Thanks 164795!

[@yonofui9682]

Thanks for sharing man I learned a lot from you

[@acservicetechchannel]

Thanks!

[@yonofui9682]

AC Service Tech LLC do you ship tools

[@acservicetechchannel]

@@yonofui9682 I link tools that I use with amazon links and at amazon.com/shop/acservicetech . If anything is purchased after entering those links, it provides a commission to the channel while keeping your cost the same. We ship the paperback book and send the ebook ourselves at acservicetech.com thanks!

[@MrJr669]

Love these videos great learning tool..

[@acservicetechchannel]

Thanks MrJr669!

[@briancurran9729]

Good detail. Thanks

[@damnitdang]

I alwys wait acouple min before wrapping the wet rag. Just to be safe.. gives me time to sort other things while it's cooling

[@MJ-iy4fb]

Hi Craig, thanks for another video. One question. Have you ever had trouble getting the last joint brazed when flowing N2? I had some trouble with a pinhole like area when flowing, almost as if the N2 was blowing out the hole and keeping the final brazing from bonding.

[@pizzasub3194]

Maybe you had too much nitrogen flowing in the pipe and creating too much pressure?

[@Goobermint]

it seems like the torch head just bakes the copper before you can do anything. if you use a tip or rosebud you can just put the braising rod right into the copper without baking it red left and right and all round. but the job was fine and fast.

[@phillipjoy8191]

Great video.What are your thoughts on using Staybrite 8 on service valves? Thanks

[@acservicetechchannel]

Phillip, you certainly could use it. It will hold and wouldn't have to worry about the heat as much on the valves. It is just the acid introduction, thanks!

[@acechoice45]

Very good content thanks

[@acservicetechchannel]

Thanks ACE!

[@Fox9582]

Nice video! I have a question why aren’t you using oxy/acet torch here and what’s the difference with the torch in this video?! Thanks

[@acservicetechchannel]

You can choose to use either an oxy-acet torch or an air-acet torch. Either one will get to the right temp for residential light commercial systems up to 1 1/8" vapor line. If there is a lot of wind and you can't block it on a roof top then yes an oxy-acet torch would be better in that instance, thanks!

[@mrcoz1764]

Let me get this straight,,,you said you can solder those lines instead of brazing??????? and looks to me like your just using a regular soldering bottle,,,,? Am i correct?

[@sebastianmarino6439]

Is an Acetylene torch hot enough for brazing a 1 1/8" lineset or do I need an oxyacetylene torch?

[@MJ-iy4fb]

I like your videos. I would like to say, I think your torch gets it way too hot. I would use an oxy-acetylene rig personally.

[@acservicetechchannel]

The tips are interchangeable and regardless of whether air acetylene or oxyacetylene are used, we are only bringing the temp up to 1500 degrees, getting the rod melted in the joint as fast as possible, and cooling, thanks

[@darthvaider4347]

also why you said you don't have to flow nitrogen when brazing filter?

[@davepenprase]

thanx for the knowledge great video

[@acservicetechchannel]

Thanks David!

[@acrepairnearme]

Cool video. Thank you. Very nice. I like it!)

[@acservicetechchannel]

Thanks Tapch!

[@michaelcostello6991]

Thank you for another practical video. I was surprise how close you can braze to the bulb especially with the nitrogen flowing towards the bulb. I know you had a wet rag. Did the bulb get hot at all ? I have no practical experience with air conditioning work yet but have brazed a good few copper water pipes. What is the hottest you could let the bulb get without risk of damage to TXV valve. Thanks Michael

[@acservicetechchannel]

Hey Michael, well the joint has to get to 1350 degrees in order to melt the rod so it was a little hotter than that. That was a large rag soaked in cold water and I got in and out as fast as I could. I am sure there are a lot of people that just braze without thinking of protecting the bulb and then the service tech is left with trying to clean the problem up. You just don't want to have the txv be jammed or stuck when it is done. The bulb was more than warm but it was not that hot once I got my hand on it after taking the wet rag off. I did not take a temp reading and I usually disconnect the bulb from the suction line, thanks

[@darthvaider4347]

any particular reason to connect nitrogen on low side instead of high side?

[@gk_filer]

how come you do't have to draw down the refrigerant?

[@alfonsoramos5597]

What is the nitrogen line for?

[@emailfilters]

7:20 - For the reasons you discussed, does it make sense for a technician to choose to replace the filter drier outside with pipe and install the new one inside (to make a longer lasting system with a little extra work)?

[@ishalljr]

Depends on the climate

[@amedhossain6032]

very nice..

[@popsmccartney435]

What number tip are you using?

[@bernieclement3373]

I dont have a nitrogen flow regulator i just adjust the main regulator until i get a tiny his feel on the other line.

[@joeshearer1247]

Sometimes regulators don't do very well at that low setting and can slowly stop the flow

[@bernieclement3373]

yes i need to get one

[@acservicetechchannel]

Hey Bernie, Joe is right, I had that problem of the pressure lowering before I was done back before I had a flow meter. I also had a leak when brazing once by accidentally having too much nitrogen going through while trying to flow without a flow regulator. It was just a pin hole. I was on top of a commercial fishing boat and the only thing I forgot was the flow regulator. I said, ehh, I will just try it with the nitrogen being lowered by my manifold gauge set. Ha ha, I went and got it after that.

[@Gasparifanboy]

Filter drier question- I had an old r-22 2 ton replaced with a 410a 2.5 ton, the tech left the old filter drier (on the outside unit on the liquid line). I know the new unit has a filter drier located in the condeu unit........ Can the old filter drier cause damage ?? If so how ?

[@acservicetechchannel]

It could introduce old oil into the system and more friction on the liquid line, wow that is a shame, I am sorry!

[@Gasparifanboy]

AC Service Tech LLC it’s been installed and running for about 1 year, (BC I’m now educating myself from your videos how things should be done correctly, thank you so much) would you suggest I pump down the system, do evac...etc and braze in a new filter drier or maybe just put in a coupling ..... or would that cause more damage and I should just let it be ?

[@davidmarler7]

what kind of torch head is that

[@acservicetechchannel]

That is a air acetylene turbo torch. I have the setup I use linked at amazon.com/shop/acservicetech thanks!

[@gh3ypr0nlv3]

What size tip are you running on your torch?

[@acservicetechchannel]

Brian, that was an 11, thanks!

[@johncote2776]

Nice work! What's your thoughts on brazing with acetylene B tank versus OxyAcetylene?

[@acservicetechchannel]

Oxy Acetylene will handle pipe sizes larger than 1 1/8 and also heavy wind. Air acetylene will usually work as well for 1/8"- 1/1/8" and is simple. B tanks last a long time as well, thanks

[@chadreyes6109]

what do you call that octopus like copper connecting in evaporator? thanks.

[@acservicetechchannel]

That is the distributor

[@chadreyes6109]

thanks. this will help for my reporting.

[@wavelogic8471]

Why do you run hydrogen wile brazing?

[@acservicetechchannel]

Check out "acservicetech brazing with and without Nitrogen" thanks

[@tooterplumber1128]

To the best of my knowledge soldering copper piping does not hold up to the vibration of the pipes as well does brazing the fittings does.

[@acservicetechchannel]

Silver soldering such as stay brite 8, does hold the R-410A pressure without any more leaks than brazing however I usually choose to braze anyway, thanks

[@Oscarbm1234]

300 psi seems a little excessive,no?...... specially on old rusted,corroded coils

[@joeshearer1247]

If the unit is pumped down I never like to go over the standing pressure of the freon. I've had the nitrogen go into the condensor through the valves before

[@Oscarbm1234]

Joe Shearer what happens if it’s the opposite.

[@acservicetechchannel]

Hey Oscar and Joe, I usually teach the pressure testing for ac and heat pumps at the same time. That is why I said 350psi. If it were a heat pump, it would need to be checked at a higher pressure. Joe is correct that you could test it at a lower pressure if it is ac only like in the video. You could test it at the highest standing pressure that it could see for the specific refrigerant you are using. For some, that would be 95 degrees, for others that could be 130 degrees. I haven't had nitrogen go back into the system though. I always wait and watch if the pressure rises after pumping down and I am sure you both do as well. Great additions! Thanks both of you!

[@acservicetechchannel]

That coil was 8 years old with a max design pressure of 450psi, thanks

[@Oscarbm1234]

AC Service Tech LLC do you think it keeps the same testing condition from when it was new?..... or would time effect it’s state or performance when pressurizing?....

[@erdalkuzay5535]

Isn`t the brazing is weak. edges of pipes visible and it looks u are very economic with solder usage. At some videos more soldering are used when they braze the pipes

[@acservicetechchannel]

Hey erdal, the object is to try to get in and out quick for less heat on the components and I did apply a normal amount of braze. In fact, I don't stop brazing usually until there is a crown at the top to finish it, thanks!

[@robertnelson4755]

You deburred the upper line over the lower line so all your shards dropped right down the lower tube. you should've deburred the tube to the side of the lower pipe.

[@Fishyplumber1986]

What tip # is that on the torch

[@acservicetechchannel]

That was a size #11, thanks!

[@Mckenziebwood]

well I'm here because my drier is mounted outside, now rusted and leaks 🤦

[@scsclassics]

Thermopaste

[@acservicetechchannel]

Absolutely, I have used that quite a bit since I started in the trade too, thanks!

[@deanmartin1966]

Great Video

[@acservicetechchannel]

Thanks Deanmartin1966!