R410A Refrigerant Charge Level Measurements on Air Conditioners! Walkthrough and Practice!
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- Опубликовано: 20 апр 2023
- In this HVAC Training Video, I Show 4 Examples of Checking the R410A Refrigerant Charge Levels on Air Conditioners. We Measure the R-410A Pressures, Saturated Temperatures, Superheat, and Subcooling, to Compare these Measurements to the Targets that they are Supposed to be. Supervision is needed by a licensed HVACR Tech while performing tasks 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 #refrigerant #charge #acunit #airconditioning #airconditioner #gauge #vapor #vaporline #lineset
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This video should be mandatory viewing for all HVAC techs!
Thanks man. Supervisor was injured and I was forced to get certified. That's enough to show me how much I don't understand.
Hey James what exact route u took to get certified wondering for my self ? If u don’t mind
@@user-mq4du2ru6z I watched videos non stop. My company did the paperwork part. Tell you what thought. With in two months I have become a competent technician. And quite a few bucks on equipment.
This video has helped me tremendously. I’ve been in the field for a little while now and this video alone has simplified my findings and reading my gauges. I’am a big fan, Thank you. Please do more.
You are a life saver🙏🙏
This presentation is text book! Clear, concise, and accurate information, well done!
Man, this is another great video. The graphics and method of explaining the subject matter is spot on. A+
thank you so much. excellent teacher
Thank you so much for the excellent explanation. It was very clear and helpful.
Excellent video thank you even an old dumb mechanic can understand this.
The visuals through out this video with the explanations are some of the best I’ve seen! Thank you!! You make it very easy to understand
You're very welcome!
Hello Teacher,... Can a Subcooling=SC goes below Zero ❓❓@@acservicetechchannel
If Subcooling at 0 or below Zero, Then it must be very low Refrigerant charge Or a LEAK ❓❓
Great walk-through and examples!
Thank you, this one really helped me
Thank you for enjoying our content, I'm so glad you found the video helpful!
What happened if Subcooling below Zero ❓❓ and Superheat at 16 degree
Great information. Thanks for sharing.
Great review Craig👍
Nice explanation and video, good class, thank you
Great job tech
Dude this was like one of the best explanations ever…perspective from a DIY here
Keep crushing it brother!
Thanks a million
Awesome video
Great content 👍
Excelente 🙏
Great videos 😊
This is really good! When doing geothermal units it can be very different, due to location of condensers and geo water lines - Keep in mind pressures, saturated line temps and subcooling (typically lower than expected)
Obviously also evap coil temps, make sure not @32°F or lower (otherwise its freezing)
Nice video sir
Ty
This was a great refresher ! Thanks again👍
Thank you for your effort, it was a very good work. Chiller devices in Turkey do not write superheat or subcooling value.
In this case, should we adjust the gas charge according to the gas pressure, gas type r410a, what are your suggestions about this situation?
Excellent job sir I wonder if you can do the same video explaing for superheat
I bought your book, read it twice, watched some of your videos and installed my own A/C unit on my own saving thousands of dollars. THANK YOU!
Did you do your own brazing? For me, that’s the scary part .
In installation tools is the most important thing. Just my refrigerant vacuum pump costs 1k to do the job right
@@imakewhat2572 I agree. If I did this for a living, I could see getting a pump like that. My cheap one got it down to 250 microns, but likely would break doing the job day after day for years like yours as well as mine was likely slower than your $1,000 one.
@@paulrozinski1488 I used Stay Brite 8 solder. I hear you, Paul about it being the scary part. At least for me worrying if the job is good enough to hold. It held pressure and vacuum without leaks before I broke the vacuum with r410a.
will the same procedure for checking correct coolant level be the same with a fixed orifice in the evaporator as one with a expansion valve?
What is the best way to check for leaks in a txv system? I was informed that uv leak detectors can clog the txv. Do you just spray everything until you see bubbles?
Great information! That’s why support this channel! Thanks👍
I must admit I wish we were using metric units but still this is a great video love your books am saving up for the Mini split book.
Just recently installed a Mini split Fujitsu unit, followed your videos which I had to go over a number of times, rather than pay someone I bought all the gear myself and now following your videos the install has gone really well. Where i am in Australia it is winter and just am so surprised at how warm the house is with minimal use of power. Modern Air heat pumps are great here in Australia
Good luck with warranty. In Australia you need to be licensed to install air-conditioning.
@@bradnewman1459 yes I know
@@bradnewman1459 Yes that is true but I am very confident that i have done the job correctly. Trying to get someone to do the job is next to impossible nowadays
Majority Product literature in the U.S. uses Imperial, not SI
What can you do if you don't get a correct Subcooling or Superheat on your gages but when you check your Temp split you get the correct readings on the supply and the Return . How can you fixe SB or your SH?
Any help appreciated :
I have a Lenox Unit outside with 410A refrigerant. I'm following these instructions to top off the refrigerant as I know it has a tiny leak and goes low every couple years. the sticker on the condensing unit outside doesn't show any TXV subcooling number. it shows the design pressure though : Hi 446 / Lo 236 PSIG. How am I supposed to figure what the target subcooling of this unit should be.
PS : I have my EPA license and will eventually replace the unit probably next year.
GREAT VIDEOS btw, very valuable information on youtube videos and the e-book.
Hello am from kenya may you please link up with me were i can get the refigeration and airconditioning equipments like compressor
Hi dear sir:gage pressur should be red or absolute pressur?
Leak check and properly using torches
On your name plate you have "TXV Subcooling" AND a "Piston Size". Is this a mistake or does a txv also have a piston size? I thought they were different things, piston you use superheat, txv you use subcooling? Thanks for the answer ahead of time, and keep up the great work.
I have a question about checking charge on a system with a piston metering device. I did a start up on a system and I had it running for 30 min but the superheat was constantly fluctuating from 2 degrees to 11 degrees superheat and I’ve noticed on other start ups my superheat fluctuating between 2 and 3 degrees up and down. Is that normal? Also I’ve done a start up on a system with piston metering device and my superheat was quite low telling me I was slightly overcharged but the sub cooling was only 1-2 degrees subcooling, what does that indicate?
I bought your e book, which is very useful but wants to change the device it's downloaded on.
Any help to achieve this ?
I love your videos. It is extremely informative and very easy to follow. I do have a question. I hope you can answer. What if there is no Subcooling on the label.
I’m in Australia and iv never seen a recommended subcooling on any unit.
I also don't see it in some units. A good rule is to be about 10 degrees of sb
And 8-12 SH if you have nothing as a reference.
He had on a note on the screen stating that just in case you don't see it on the unit, the subcooling target is 11 for units with a TXV
How to charge ac with electric txv ?
i charge my ac in r410 for each extera meter pipe add 20 gr but my pressure in out and in is 120 to 160 is correct ?
If you ever write a book on furnaces, I’ll be the first to buy it!
How Do I check sudcooling and superheat in a pakage Unit.
Can dirty condenser coil result in low subcooling numbers fooling a tech into think it's low on charge?
Could it possibly also be a bad txv?
Hello
None of the units I work on have any info for the sub cooling
Where can I buy those type of gauges?
So with a txv is the superheat standard always between 8 and 14 degrees?
From what I gather you are more concentrating on on sub cooling than opposed to super heat. But you'd always want around like you said 8-14 super heat. If you have a piston system you'll concentrate more on super heat with ambient and wet bulb temps. Also matters how long the line set is. The longer the line set the higher the super heat. So many variables.
Great video. It's easier to understand this helps a lot with hvac school week 3
This might be dumb. If there’s no information on the name plate. How would you recommend to determine target superheat
So, how do I find that out
How to charge ac with electric txv ?r410
It's that time of season 😅
My job is wanting me to test pressures when it's 35 to 45 degrees outside. Bsrrly6gets uo to 50 degrees some days. Really fun
SAME!
I told them I wont get the true pressures and everything will be out of the ordinary. We should wait for summer. My boss said you can read pressures at any weather. Well duuh. But it won't be the REAL measurements when the system will be under load in a hot summer day. Jesus these ppl just don't give a fuck and are so ignorant. Not to mention I constantly argue with him that a low refrigerant situation would cause the evap coil to freeze, he says otherwise.(and that's just one of our arguments) 🤦♂️ I can't deal with old techs that think they know everything because they have 20 years of experience.
I never saw the sub cooling numbers on the nameplate
I have 2010 (13 years old) Trane 5 ton 14 SEER heat pump, TXV. Label states the following: R410A, 10 degree subcooling, comp RLA 26.4, Design PSI HIGH 480 LOW 480. Anyone know what "Design PSI HIGH 480 LOW 480" means? It's not cooling very well so I took pressures today when it was 111 degrees outside. Readings were High 510 PSI (136 degrees saturation), liquid line 118 degrees. Low 135 PSI (46 degree saturation), vapor line 74 degrees. That's 18 degrees Subcooling and 28 degrees SuperHeat. Not sure I truly trust my line temps since I'm using an inexpensive thermocouple. I may need to invest in the Fieldpiece thermocouple you use in your videos. How does high ambient temps affect pressures and line temps? If using approach method, my liquid line is 7 degrees above ambient but my pressure should be closer to 480, not 510 PSI. I also checked my compressor amps at about 23 amps. RLA is 26.4. I'm going to check the pressures again in the morning when it's closer to 90 degrees.
I checked again today while outdoor temp was 91 degrees. H 380 PSI (113 degree sat temp ), L 143 (50 degree sat temp). My Subcooling was about 11 degrees with 12 degree Super heat. Very drastic difference with ambient temp 91 vs 111 degrees.
Is this method i can use with mini splits units
No, mini splits do not use TXV (in the traditional sense) they use EEV which are controlled by the outdoor unit printed circuit board. They are completely different beasts , and it’s almost impossible to use traditional troubleshooting methods with them. You should check out his new book on mini splits.
Mini splits are their own mystery. Nobody I know understands them hardly lol
Mini split is a "critically charged unit", and are charged by weight. You have to recover the refrigerant, weigh in refrigerant to the manufacturer's spec, and walk away.
Plz save your video with mertic parameters
Are you going to make a book for furnaces?
What about if it's a piston type, and you don't know the target sh
Durrr
Talking like a machine gun.
Sorry to hear about your hearing issue.
is +3/-3 degrees the rule of thumb for the target sub cooling for all the units?