Compressor Replacement! Using Triple Vacuum Evacuation! 

So the more I thought about this one the more I’m thinking there is an issue with the TXV staying open too far. Usually a non adjustable TXV has a Minimum Superheat setting which keeps the superheat positive. I am getting a 0 superheat. Even after I put the bulb in 32° water, I only got about 8° of super heat. The TXV should have closed a lot more than that in freezing water. I am following up in a couple weeks to replace the filter drier (standard practice after a burnout) and I will bring a TXV with me when I go back. Jeff

Any time I have a non working compressor, a new TXV goes right along with it! I can sell the TXV on the bid proposal much easier than sell the TXV, consumables and labor after the compressor is in. Customer looses confidence in you when you add additional cost after the fact. I like to put the bolts in before brazing the compressor. If not properly aligned it puts strain on the copper and you may not be able to find the holes after the copper is in. If the lineset was causing a substantial restriction there would be flashing along the way and this would be visible in by reduction in liquid line temperature at the TXV. This would be more evident on a hot day, because the heat gain along the line would reduce the SC. 11 degrees of SC is there to make sure the refrigerant has few degrees of SC at the TXV. When charging a split system on a 115 degree day I may back off on the SC a little if my CTOA is around 20 degrees.

That txv over feeding is probably what killed the compressor in the first place...

Best how to video of unbrazing! You earned my subscribe! Was nice of you to clear the leaves out for home owner.

Yellow jacket makes a vacuum rated stubby hose . I use it to attach my micron gauge and then close the ball valve on the hose when I’m ready to charge so oil never hits the sensor

I subbed. Im in school to become a tech and that was a very good video of a triple evacuation. Im always looking to do things the best I can when I work. Thank you for the video, I saved it to look back on.

the TXV is probably borked from the junk that came from the old compressor. it should always be replaced after a violent compressor death. dont forget any check valves and/or the 4 way valve! and ensure its running proper in both modes. its really sucks if you have to replace those...

Brilliant job👍👍👍

And I believe your pinned comment is correct , I bet the txv is most definitely over feeding . That sucks because those type of things there’s really no way to know that until you get the system back up and running . A lot of guys at my company when compressors fail are starting to always add TXVs to the repair quotes just to cover the ass and I’m probably going to start doing the same thing , within reason of course

Outstanding!!! Love the bulb test. Does no super heat mean you have liquid going back to compressor? Yeah something is up, maybe that 5/16 is kinked somewhere or the meter device on the outdoor unit is gunked up. 🤔

That little of missing insulation will not hurt anything, it just looks a lot cleaner.

Jeff, a couple of weeks ago we had the exact same problem compressor making weird noises at starting, well same thing low super heat and sub cooling wouldn't rise, replaced txv and compressor and what a difference, su cooling went up and super heat is at where it should be

Nice job bro what size of tip use for compressor lines and how to set torch I mean how many pressure for acetylene and oxygen? Thank you

close suction isolation valve and no leak from compressor

My compressor inlet and outlet is copper plated steel. Would you recommend flux and a 45%or 56% silver braze in case us newbees burn through the copper plating on the steel compressor ports? I figured it's the safest bet so it would work with either metals.

I used to always put in a suction filter after a burnout

What did take out the compressor? I think I would go back and change the liquid line out because there was not enough discharge. to get rid of the heat and I think the compressor overheated. I also agree with Jon Hvac I would also change the TXv would not be a bad idea

I don’t think it’s the size of the discharge line because your head pressure was normal. I think Txv

I'd change the TXV

Maybe airflow, also don’t see how adding that extra refrigerant would cause it to start flooding back again. Did you let it run 15 minutes after that?

dode it was gray , just miss one think every time you change an compressor change the tsv

What tip did you use on your torch? You were able to heat it up fast. Does breaking vacuum hurt the micron gauge?

At least now you know what killed that compressor

Copeland wants stubs on compressor, Do Not beat it shut.

Hi. I need to replace a Mitsubishi compressor. Will map pro gas get hot enough to separate the lines from the compressor? Are you using oxy acetylene?

What kind of brazing rod did you use for the compressor? silfos15?

Hi Jeff I’m curious you could have quoted a new condenser right?

Glad that’s a Copeland. I am not a fan of LG.

Don’t those tests say must be running compressor and take sample of vapor refrigerant??

Running no superheat is really bad for the compressor no wonder it burned up.

Never charge on the low side. Liquid in the compressor.

You just killed the new compressor