AC EXPERIMENTING WITH SUPERHEAT & SUBCOOLING DIFFERENT TEMP PROB PLACEMENT EVAP LOADING
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- Опубліковано 6 жов 2024
- This is a teaching video. to show you different possible scenarios under different temperature loads to show you what happens to pressures and superheat and cooling.
M measuring before, and after the internal heat exchanger IHX
MEASURING WHAT HAPPENS BETWEEN THE DIFFERENCE OF RECYCLE MODE OR FRESH AIR MODE WITH HOT AIR ENTERING EVAPORATOR
this is a long video 
Great video thank you Tom
Thanks for taking the time out of your busy schedule to make this video for us. I found it fascinating and enlightning.
Thank you
Thank you so much, detailed and very nice video.
I wish I had the time to do better. I could do so much better than this video.
But I just have too much work
But I will try to make some more experimental, teaching videos like this one
I've been waiting for a lengthy video. We know how busy you are, thanks for taking the time
It was an expensive video video.
It cost me to knock one recharge job off at the end of the day .
That’s exactly why I don’t do lengthy videos usually
Or do any editing or retakes?
The best way to prevent moisture getting in the system is to stop recovery before 0 PSIG to keep oil saturated with refrigerant. If you drill a hole on the disposable cylinder with refrigerant equal to atmospheric pressure, it will not come out of the cylinder unless you turn it upside down. I drilled a hole on several refrigerant cylinders several months ago. The leak detector can still detect it. The last time I checked was a few weeks ago . Refrigerant is so much heavier than air.
More long videos ,, with theory
I watch your videos every day, I've seen hundreds of them I cant remember a long video this thorough on theory. Thanks for continuing to share your knowledge which I hope improves the automotive industry You da MAN !!!!!
I did get carried a little away with that video a little too long.
But an instructor in the Facebook group
Automotive HVAC technicians
Said he was giving a class and he wanted to know more about superheat and subcooling
So I did a special for him
But by the end of the day, it cost me the loss of one because of the extra time I took
But I hope it helped a lot of people understand a little bit more
Ty for the long video
Have you ever repaired atc sensors?,, could you do videos of the sensors?
atc ?
Gracias maestro
Then the super cool comes out the dash vents! ;)
Super cool Universal refrigerant oil with dye
I wish the car manufactures made and test mode and published specs, so that we had a way to check charge level. I would love to be able to hook up pressure and temp probes and part of a normal service inspection and be able to let the customer know they have a problem.
This is exactly what every Shop should be doing for decades. These measurement instruments have been around for years. The only reason the automotive industry has not gotten into it heavily because there’s no education.
The other reason cheap the majority of owners of shops are cheap
Then there’s lazy
Everybody wants simple, cheap, and easy
Too complicated to use the brain . 🧠
This was the way I was taught as a child before high school from my father
And this is the exact same way my father was taught when he was a young man getting out of high school back in the 1950s going into the 60s by his mentor apprenticeship program .
This is not new and this is not fancy. It’s not technically advanced. The math level is that of a first grader to follow the formulas to arrive at the equations. .
@@coldfinger459sub0 the basic theory was taught to me in automotive classes, but then after that, its all left up to a "do it all" machine. Even master level training through several OE's only taught how to use the machine they recommended and that is all. Never heard superheat or subcool until coming acrossed HVAC school youtube videos. Your videos are the only thing I've found so far bringing HVAC practices to automotive. I wonder how many of the machines I've used over the years won't even pull a deep vacuum, or had contaminated recycle tanks.
@@andrewhennerfeind9879 since I own a refrigerant analyzer and I test the refrigerant before I recover it after it just came from another shop from being charged with the big machines
I could tell you, the majority of them are contaminated with either air or other gases and definitely 90% of them high concentrations of moisture
Because of how many times did you replace the dryer material and the big machines almost nobody ever changes them for years
Usually saturated after a few dozen cars and no longer doing anything just passing the moisture through .
Using superheat and subcooling using a micron gauge for deep vacuum . This was taught to me by my father and Automotive back in the late 1970s..
My father had three mentors for doing air-conditioning condition . And that was back in the late 1950s early early 1960s.. and his mentors who taught him about air-conditioning, taught him superheat and sub, sub, cooling and back then it was an analog micron gauge. Welsh , Vacuum pump.
So none of this information is new
It’s just the lack of knowledge and education that all the Automotive instructors who are teaching automotive air-conditioning are not qualified for the jobs that they’re teaching .
And this leads down to technicians who never taught properly in the first
So we have generation after generation of a majority of automotive technicians, never learning from the right instructors in the first place
Just because they were given the job title of being an instructor doesn’t mean they know what they were doing
Everything was performed minimum standards and got the vehicle tail lights out the door collecting money that’s it
Very interesting
For me to go over every topic and every subject and every possibility
I would have to hold a 3 to 4 hour long class 2 to 3 nights a week for an entire semester or two
And that would be just highlights
Damn that sounds like a trade school college class
🤔
so does the negative superheat on the liquid line going to the expansion valve mean there is vapor going into the expansion valve? I would have thought that the liquid line going through the internal heat exchanger pipe would cause it to go more positive since it should be cooling it down more?
I was trying to look back in my video no patience to watch the whole thing again. Where I had my high temperature clamp connected.
Because I was doing a lot of talking with the video moving to clamp probe temperature onto different pipes .
Can’t remember if I had it in the proper location while I was talking and shooting video .
Issues when you try to shoot video but still try to keep up your day to move onto the next job while you’re being distracted with text messages and emails popping up over the screen while you’re shooting videos people asking you. What time are you going to get here? 🤦♀️
But cars definitely sometimes do not follow any of the rules like residential or Refrigeration .
They force those things to operate in conditions you would never want a home unit or a freezer compressor to live through continuously .
lol, I hear ya man. Thanks for clarifying and taking the time to put these videos out. You and all the other people/channels you mentioned in the video have really helped me better understand HVAC and opened my eyes to how vastly complex these systems can be. HVAC in automotive tech programs barely scratch the surface it seems. At least 20yrs ago they did, maybe today they get more in-depth.
@@H750S no today’s auto programs have not improved 😔
But o got some to open their eyes. 👀
I talked to some after seeing my videos. They are starting to teach differently.
They mostly still only use analog gauges from back in the days when we used to crank start our vehicles 😂
3000+ is my guess.
What is 3000+ ?
3k microns