Compressor Replacement! Using Triple Vacuum Evacuation!
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- เผยแพร่เมื่อ 12 พ.ค. 2023
- In this video we remove a compressor that Burnt Out and blew a pin. Install a new compressor, and pull a triple Vacuum!
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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
Best how to video of unbrazing! You earned my subscribe! Was nice of you to clear the leaves out for home owner.
Appreciate that. I did get most of the leaves out of the base pan.
Brilliant job👍👍👍
Thanks man.
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.
Thanks for watching, and subbing!
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
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...
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
Yea it certainly does suck having to go back to the customer with the news but usually they understand in the long run.
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
That little of missing insulation will not hurt anything, it just looks a lot cleaner.
Yup. I didn’t have any to put back anyway. 😂🤙
I used to always put in a suction filter after a burnout
I considered that but where the acid test came negative I decided against it.
close suction isolation valve and no leak from compressor
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. 🤔
Yea no super heat means liquid is coming back. I’m going to follow up in a couple weeks to change the filter drier anyway. (Usually always do that after a burnout.) And I might pull the outdoor piston and clean and also maybe check that indoor TXV again. It was working but i have a suspicion it might not be working properly.
When you go back to change the txv and drier will you use the same refrigerant? Or do you have to go back in with virgin 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
The stuck TXV took the compressor out.
dode it was gray , just miss one think every time you change an compressor change the tsv
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
I’m not exactly sure what size the tip I use is but I set my pressures at 7 acetylene and 14 oxygen. Some guys due 10-20 but I’m good at 7-14.
I'd change the TXV
Yea I am. I pinned a comment about it.
What tip did you use on your torch? You were able to heat it up fast. Does breaking vacuum hurt the micron gauge?
Just a standard tip. No, the micron gauge can handle a little pressure.
That txv over feeding is probably what killed the compressor in the first place...
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?
It was a bad TXV.
What kind of brazing rod did you use for the compressor? silfos15?
Harris Stay-Silv 15. 15% silver 80% copper 5% phosphorus
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?
I don’t think Map gas will get it hot enough. And if it does it will take a really long time. Your gonna need Oxy acetylene (recommended) or turbo torch.
I don’t think it’s the size of the discharge line because your head pressure was normal. I think Txv
Yea. I pinned a comment about it.
At least now you know what killed that compressor
Sure do!
Copeland wants stubs on compressor, Do Not beat it shut.
Didn’t know that. Been beating them shut for 20 years. Thanks for the advice.
Hi Jeff I’m curious you could have quoted a new condenser right?
This one is going back a ways but I’m thinking this compressor was under warranty.
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??
Ideally yes. But where this compressor was bad and blew a pin, I had no choice.
Running no superheat is really bad for the compressor no wonder it burned up.
Never charge on the low side. Liquid in the compressor.
That's the only way you can charge when topping a system off. A heat pump has a suction accumulater which protects the compressor. I agree you don't want to slug a compressor with liquid while it's running but charging with liquid slowly through your suction side is the only option most times on AC systems.
You just killed the new compressor
No.