I always pulled the suction brass compression nut back, put a wet rag on aluminum side and brazed copper to brass with flux...worked every time.

i dont know why people complain ....this man is taking his time to show people how to do something and have idiots asking and saying dumb shit......but good job sir i like watching your videos!!!

@NathansHVAC

7 жыл бұрын

Thanks for the comment.

Very interesting. Thank you for the demonstration.

Excellent job ! Thank you !

Thank you for the video!

Great job

Nice repair job, never fixed aluminum/copper . Have made aluminum coil repairs on Trane outdoor, and Carrier indoor coils with couplings ..

nice job

very good man

Great job and video, the cut hole is a piece of cake to cover back up, who cares as long as the system is up and running, not a structural issue and the next repair will have access. How come no backing flame shield against the evap or insulation just for good measures?

never done it so i cant say for sure but i think your supposed to heat the copper mostly and let the heat transfer to aluminum. but its nice to see somone not on lucas payroll use it before i dish out 30 bux for a few sticks lol

well done...

I like your cosmetic mirror

Great job! I am all for fixing stuff. Does the copper to ali joint need covering once done? I have seen some solder here but they recommend the joint is covered with heat shrink to keep the moisture out to prevent corrosion.

@NathansHVAC

8 жыл бұрын

It probably would last longer if covered. I usually use silicone instead of heat shrink.

Now how do you fix a hole in the side of the evaporator coil?

Finally found a aluminum to copper repair in the field. Only question is why not slide the evaporator out instead of cutting the hole ?

@NathansHVAC

3 жыл бұрын

That design doesn't let the coil slide out. It had to be lifted and then slid. The hole was easier.

Did you use the same size tip for normal brazing

Nice repair but maybe pull the coil next time? You did a neat repair but anyone who comes behind will slander you because you cut that big hole

@NathansHVAC

8 жыл бұрын

On this one the coil wouldn't pull without huge effort.

@rookieinvestments3663

6 жыл бұрын

Exactly

You could have cut out the leaking "O" ring and just braze in at threaded part of coupling with low temp solder. (Carrier gave this option on original installation last century.)

If you hook up a vacuum pump, crack the valve putting the system in a slight vacuum and heat the copper, you'll get full penetration and won't need to move the torch around the joint.

@NathansHVAC

4 жыл бұрын

I always wondered about that. I'll search some videos on vacuum soldering.

@jasonkoning9306

4 жыл бұрын

@@NathansHVAC it's just my theory based on my own trial and error. Before hooking up the pump, I would always end up with a pin hole leak. Hit that and another would turn up in a spot that was already sealed... Only thing I can think of is residual oils getting trapped in the joint and expanding from the heat before the filler metal solidifies.. maybe the slight vacuum counters it, but what do I know, I'm just a stupid refrigeration mechanic

I like your Pink mirror LOL

@NathansHVAC

7 жыл бұрын

7 years bad luck if I break that little pink bastard:)

I'd be careful with regular brake cleaner around heat. You should use the brake cleaner in the green can (non-chlorinated) if you're gonna use hot processes around it. I'm not sure about soldering heat levels, but I know a lot of welders have either died or had life long injuries from chlorinated brake cleaner.

@jpcallan97225

4 жыл бұрын

Heated Brakleen can decompose into chemical weapon agent phosgene gas (COCl2). But Brakleen boils away at room temperature, so gently preheating the parts to joined removes any residue. It's a great degreaser. Check the ingredients in the so-called "green" Brakleen formulation - it's got loads of acetone, which softens or strips any paint it might splash on.

Can I send you an inspection mirror?

Any recommend supplier for AL 822 rod?

0:53 and is it not evident that the nut on the liquid port of the same burst , it dragged

that hole.... the coil wouldn't come out?

Brother, over all good Job, Bravo! However, Why didn't you use new copper for the new connection? that old nasty copper? Why didn't you pull out the coil and do it, vs cutting a hole in cabinet? now you have to use blockout n cover hole up n pookie/mastic it

@NathansHVAC

3 жыл бұрын

Old copper is fine. On this particular job I wanted to spend the minimum amount of labor. cutting the hole allowed faster access because that coil has to lift up and out rather than just slide out.

How long have you been using that mirror to check your solder? Im betting ever since your wive founded on your truck. Just kidding ;-0

you cut a gaping hole in the unit just to solde some tube

@NathansHVAC

8 жыл бұрын

Not just any tube. Copper to aluminum. Nobody does this in the HVAC industry.

An urgent reply I have the problem at my project Package AC Unit condensing coil and copper joint leakage, I need to braze the Aluminum condenser coil and copper joint area trying to weld but it's not getting joint. Please, any one can help, How to solve the problem.

@NathansHVAC

7 жыл бұрын

These joints aren't that bad. It might take several attempts, but keep trying. Make sure to de-grease all oil with solvent. Use the AL-822. All the other solders are bad. It is normal to take a few attempts. Use soap bubbles to check for leaks after every attempt. Keep the joint very cool. Too much heat is bad. If you smoke the joint, pull it apart, sand and try again.

I hate copper to aluminum Haha where I work all our line sets are aluminum and then we add copper when connecting the air handle and condensing unit. It's tough to get those copper to aluminums to hold and not leak.

@orlandojohnson5742

5 жыл бұрын

Alek Gutierrez aluminum line sets!? Yuck 🤢!!! That's gotta be harder to deal with!? Sounds like the bosses need to do a few jobs.... they'll probably see the big picture afterwards!!! Call back city!

Was this 25 year old system worth this repair?

@NathansHVAC

7 жыл бұрын

dave donahue. I just wanted to try out the fix for you guys. I do it, you watch the video, and you can do it too. but on a newer unit of course.

Does anyone know the difference (practically) between this AL822 and a similar alloy AL802? Chemically this AL822 braze rod is 22% aluminum, balance zinc. Whereas the AL802 is 2% aluminum, balance zinc. But practically, why would you pick one over the other?

@jonsaircond8520

5 жыл бұрын

Manufacturer says the 822 will fill larger gaps and best for repairs. 802 needs a 6 thousands or less

You want to use the Green Brakleen,not the red

крууто

Can You give us a udate..lol i want to know if this is still alive and kickin...)

@NathansHVAC

4 жыл бұрын

I haven't heard. No news is good news I suppose.