Refrigeration Cycle Split System - HVAC Online Training and Courses
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- čas přidán 3. 11. 2019
- In this video, I describe the components in a refrigeration cycle and what they do, to include the accessories that you might find in a system.
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Just a novice watched a lot of these one of the best, this has become a 69 year ole man hobby. Thanks
69 years old? You're just a little bit older than I am! This is a great hobby to have, great skills and this will keep you going. Of course you can make some extra money after retirement! Thanks for watching!!!
This is what I call MASTER CLASS REFRIGERATION CYCLE Excellent explanation Julio thank you
Your RAT fell to his demise at about 2 minutes in. Thanks for the great explinations!
Thank you, and thank you for watching!
Thank you Julio. They are thousands of videos out there, but no one explains is like you do.
You are awesome!
Thank you so much! I hope these videos help with that new job interview that's coming up!
What a genius!!!. Explained very nicely. thanks lot.
Thank you so much! Such kind words! Thank you and thank you for watching!
Tremendous work breaking this down. Been doing HVAC for over a decade and have never seen this more simplified. A MUST SEE for new techs.
Thank you SO MUCH!!!! I am glad you liked. I love teaching and watching the lightbulb come on when the guys get it!!!! Thanks!!!
Excellent presentation! I'm wanting to understand how my AC at home works as well as maintain it. I learned so much this day. Thank you. I will subscribe and watch more now.
Thank you! I am so glad to hear that. I enjoyed teaching and I like it when I can help people out there! If you get a chance, check out my webpage airconacademy.com I have a few courses on there! Thank you for watching!
@@AirConAcademy Yes, I still have the tabs up in the browser to continue my education. One thing I want to do is to put some gauges on the compressor outside and leave there so I can just walk out and do a quick glance to check for any leakage. What are you thoughts on that?
@@pstreicher I will be honest with you. I try that a long, long time ago and after a few months, my gauges broke because of all of the constant movement. So I don't think I would try that. I suppose if you get a set of digital gauges? Or those digital probes so you can hook on and read them from an app from your phone that might work, but you're talking about more expensive! Keep this in mind. If you keep your vents open, you don't have any leaks, and your filters are kept clean. You should never have to hook up gauges to your system. I have lived in my house for 16 years and only hooked up gauges once and that was shortly after I moved in.
@@AirConAcademy Thank you for the reply. I had thought about the longevity of the gauges being hooked up and the cost, which is not a bother to me. Yes, with everything digital today that was what I was thinking. The ability to monitor in an app like everything else today. I use a 'SENSE' electrical monitor for my house now which shows me the cycling of the AC and the wattage the motors pull when starting. I am one of those anal type persons that like to keep tabs on everything, maybe to the point of being ridiculous to some people. I'll let you and your viewers know what if anything I install and do with this idea.
Also, as far as your courses at the academy, I am a consumer, retired from telcom, working with power and electronics for over 44 years. I do not plan to go into the AC business therefore I find that taking professionals courses is way too much. I would like to see AC courses that are consumer oriented with chapters or segments whereby a person could click on to learn more, even if an extra charge was added as you go. See where I'm going with this? Maybe something to think about for the future income stream. ;)
Wow! You did a great job explaining all of this. Thanks!
This guy is the BEST!!!!!
Thank you so much! I'm so glad that you think so. I hope I can keep helping you out in the field.
Awesome work in a short video.....bravo
Thank you I am glad you liked it!!! Thank you for watching!!!!
Excellent explanation... You made it very simple and crystal clear. Thanks alot for sharing your experience and knowledge...
Thank you so much! I'm glad you liked it. I hope I can get some more videos on here soon.!
Another great video brother,..keep it coming,..grascias from Philippines
This video IMO is among the best overviews on YT. Your skill as an instructor is impressive. Thank you very much indeed.
Thank you so much I really appreciate your comments! I'm glad you like the video! I hope to have more on here soon.
As others stated. The best explanation I have had. Thank you thank you thank you.
You are the best Julio!! Thank you
Thank you !!!! I am glad you liked it I hoped it helped!!!
Loved it. Thank you Julio.
Thank you for watching!!!!
Very helpful and professional
YOU’RE AWESOME BRO!👍🏾
omarr vision thank you!!! Glad to help!!!
Best hvac channel,thx u Julio
Thank you If you have any suggestions please send them to me!!!
As always, extremely excellent lecture. Thank you very much for sharing your experience and knowledge!
Thank you so much!!! I really appreciate your comments!!! and thank you for watching!!!
Thanks for your time and sharing your knowledge with us. I'm senior hvac tech. At my company I have answers for every one. One question I have and it seems no body can answer even my teacher at tech school didn't give me straight answer.
I know refrigerant works based on pressure and temperature relationship. We don't have have service valve at evaporate to measure the pressure instead we do it at suction line but how could pressure at suction line that we take measures for our suction temperature relates to that because we have higher temperature and we translate that pressure which is higher pressure due to be superheated vapor and translate it to temperature in the middle of coil . Isn't different temperature different pressure? I really appreciate helping good tech that take pride in every job. Thanks for your valuable time.
Thank you for your question! Believe it or not I have had that question several times before while teaching in the class. The metering device create a pressure drop in the pressure will stay practically the same until it gets to the compressor. The compressor compressor the refrigerant and that high-pressure will stay practically the same until it gets to the metering device. The engineers that designed the system have figured out what size the tubing needs to be in the evaporator to maintain the proper pressure throughout it. Also in the installation manual for the unit you can look up to see what size your suction and liquid lines need to be. This is important because that is how we maintain practically the same pressure throughout the low side and the high side. The compressor draws the refrigerant from the evaporator and there is a slight pressure drop from the evaporator to the compressor, if installation is done properly it will only be a couple of pounds, maybe three or four at the most. Yes, we are racing the temperature at the tail coil of the evaporator and in the suction line but because the compressor is pulling the refrigerant out the pressure tends to stay the same throughout the low side. Because of this we can have a constant pressure and the temperature can increase therefore increasing the superheat. I hope this makes sense please let me know if you have other questions. And thank you for sharing your knowledge with the guys that you know. In my mind it is us that have more experience that are supposed to help then you guys to keep the trade going and put out some good mechanics! Good luck and thanks for the comments and question.
Thank you so much Mr Julio. Sorry I worked almost 15 hrs yesterday helping old friend does refrigeration can't see well for brazing and doing some electrical plus great mentor. Didn't have time to thank you for reply my question. Teachers like you great inspiration for us to keep up the job with good knowledge and integrity. Unfortunately I see so many tech from other companies not taking pride and not even knowing what they are doing just swapping part which is sad. Appreciate time you put and set up these videos. Keep up great work because tech like us eager to learn more.
@@1971omi thank you so much for your kind comments! I am so glad that I can help you guys out there. I know how frustrating it is when other technicians just replace parts. But good luck out there and I hope to have other videos on here soon for you guys!
Julio you are the best !!!
Thank you!!!! I am glad I can help you guys out there!!!
Thank you Mr. Julio
thank you and thank you for watching!!!
Хулио, ты лучший преподаватель технических дисциплин! Так держать!
I am sorry I cannot read the writing. :-(
Спасибо!!!!
amazing explanation. top class video.
Thank you!!!! I really appreciate your comment and thank you I'm glad you like the video!
Thanks sir ..God bless you ..greeting from egypt
Thank you!!!! it is beautiful country!!!! I was there many years ago!!! I loved it!!!!
Thank you!! so much teacher I like your valuable class.
thank you!!! I am glad you liked it!!!!
thank´s to your excelent explanation. From Brazil...
From Brazil? I think this has been the first message from Brazil! Thank you so much and thank you for watching!
Thanks as always for Teaching im Learning always im a newbie Technician
Thank you for the comment I was hoping this would help some of you guys with not much experience!!!!
Very useful. Thank you sir.
I am glad I could help!!!
Excellent explanation
Thank you so much for your comment and for watching!
Thanks for sharing! Subscribed
Thank you! I hope to have some other videos out soon! Thank you for watching!
Great one sir. Your explanation with all the basic necessary details are great. Please cover more and more topics.
Thank you I will try!!!
Wow! Thanks Julio! The most perfect Refrigeration cycle I ever watch in youtube! ☝👍 Good job!
Gerry Metrillo thank you!!!!
Excellent!
Thank you!!!!
Great video sir!
Thank yo and thank you for watching!!!!
Simply superb
Thank you!!!! I am so glad you liked it!!!!
Thumbs up . I love it
Thank you! I'm glad you like the video!
Great job sir! I’m in my 2nd semester for completing an associates in HVAC, working on gas and heat and residential installation this spring. This was a good review to get me back into it again.
Thank you I am glad I can help!!!!
Good review..thumbs up
Thank you sir very nice explanation
Thank you I am glad you liked it!!!!
great work
Thank you Thank you for watching
Thank U sir,for this video
Thank you!!!
So wonderful go on thanks more
Thank you for watching. Thank you for your kind words and I hope I can make some more videos here soon! Again, thank you for watching, and be careful out there!
Excellent
Thank you very much! And thank you for watching!
Good explanation
Thank you so much! I'm glad you like the video!
you are very good
Thank you!!!!
Nicely Explained, Sir
Thank you!!!
@@AirConAcademy Your Welcome
Thanks Sir appreciate
Thank you! And thank you for watching!
Thanks sir
Thank you very much for watching. Keep learning and be safe out there!
check with your sat chart you get rate of flow
Great video sir and very helpful. When the unit is off. Where does the refrigerant stays. Thank you.
The refrigerant will stay throughout the system. All of the pressures equalize so there is a mixture of liquid and vapor throughout the system. Unless it is a pump-down system. Thank you for your question.
Hello sir, your class is clearly understanding, thanks alot, God bless you,
I have a doubt, sir can I use infrared thermometer for measuring superheat and aubcool
I always discourage everyone from using the infrared thermometers. Sometimes you do not get the correct readings because of how they work. The light that you see on the infrared thermometers it's just an approximate indication of where you are getting the temperature reading. I always tell the students to use an actual temperature probe that is in contact with the suction line or the liquid line. So I would suggest staying away from the infrared thermometers. Thank you for watching!
🤩🤩🤩
Thanks, I have seen some tech would front seat the suction service valve while the compressor running to test the compressor valve,is it safe to do it, how low we can go while the compressor running is there a possibility that the winding arc to the casing from inside if it goes to vacuum.
Thank you sir for this informative video How can I find a rest of your videos please thanks
Please go to airconacademy czcams.com/channels/TsF95BiLh3USIuumFz8s6w.html?view_as=subscriber
Thank you sir I really appreciate you
Great video.
Question: (around min 13:00): how does the suction line temperature get from 50 internal SH to 68 external SH?
In that section, I am talking about the suction line temperature as it leaves the evaporator, but the suction pressure is 68 psig which converts to 40°. They gives me a 40° evaporator according to the PT chart. The temperature at the outlet of the evaporator should be right around 50°F. Right by the inlet to the condensing unit I am taking a temperature reading and that is supposed to read 65°F. My evaporator temperature is 40°F, because of that I have 25° of superheat. I am explaining that you need to have insulation on suction line so your superheat is not too high. I hope this answered your question. If it did not please let me know. And thank you for watching.
In VRV If Four Evaporator each 1.5 Ton Then What Should be the Ton Of Compressor
The compressor should be able to handle all of the Evaporators so it should be a 6 ton. BUT with these new systems they use a Variable speed compressor so the best thing to do is to order the actual compressor from the manufacturer. Do an OEM replacement for the compressor. Good luck!!
How are you my friend you have any video about big three phase system
I have some videos on three phase motors, they are about the electrical side not the refrigerant side. I'm not sure if that helps any but that's all I have for now. Thank you
Around 11:25, how can the pressure/temp reading taken at the suction line valve be equal to the pressure/temp all the way back at the evaporator (40 degrees), when the temp at the evap outlet is higher than this (50 degrees) ?
The pressure that you find in a system is telling you what the saturation temperature is or in other words the boiling temperature. The refrigerant is saturated and boiling in the evaporator. After all of the refrigerant has boiled off then the refrigerant starts to be super heated. In other words the temperature of the refrigerant gas will go higher than the saturation temperature. This is how we figure out superheat, and this is how we charge some systems by using superheat readings. I hope this makes sense. I have other videos on here that explain the superheat process, subcooling process and desuperheating process, which is what happens inside of the refrigeration cycle. I hope this helps and thank you for sending your message in and thank you for watching!
Hi what is the ideal super heat of a coolroom and a freezer room respectively?
Can you get superheat of a domestic fridge??
Typically in coolrooms, the evaporator will have a TXV. In that case the TXV should be preset. Anytime a system has a TXV. The system is charged by subcooling. Most systems use around 10° of superheat and around 15° of sub cooling. but those Numbers are what we would call rule of thumb. The manufacturer could let you know for sure what that should be. And in a domestic refrigerator, typically those are charged by weight. If you look on the data plate of the refrigerator, it will tell you how much refrigerant it was charged with. Which means that all of that refrigerant should be recovered, pull a good vacuum on it and then charged by weight. The only problem is that these days some refrigerant used in refrigerators are flammable. So before you do anything to the refrigerator, you should look for some red markings on the tubing of the compressor. If any of the tubing has red. Paint or red sleeves do not mess with it!!!! that refrigerant is flammable and you could create an explosion. Good luck and be very careful with these new machines!
Sir i need your help!! Temperature of the refrigerant after the expansion valve has to be lower than refrigerant leaving(suction line) the evaporator coil???
Yes , The temperature of the refrigerant leaving the evaporator needs to be higher then the evaporator temperature. the evaporator will be at saturation temperature and the refrigerant leaving the evaporator at the suction line will be super-heated. take a look at this video. Evaporator temperature czcams.com/video/8AHitdLEC_4/video.html
also look at Evaporator operator and superheat czcams.com/video/LckKofURNkE/video.html
I hopew this helps
Hello,
I just wonder where is the expansion valve?
I guess is in the cooling unit am I right?
Yes! The expansion valve is at the inlet of the evaporator. Or as you put it in the cooling unit. Please take a look at my other videos I believe that I have somewhere I explain where all of the components are placed. Good luck and keep learning!
@@AirConAcademy Great Thanks!
Sir why aircool chiller at first unloading when start the chiller ?
That is done to ease the starting of the compressor. The amperage is much lower when it is unloaded. High amperage will heat up the electric motor and cut its life expectancy down.
Jop
So if there is acid in the system due to a improper vacuum or contamination, why not just revaccuum? Why purchase an HH filter? Wouldn't you still risk the acid destroying the compressor before it all got filtered out?
That's a very good question! You cannot just re-vacuum, because when the moisture that was not pulled out with the original evacuation mixes with the oil, POE oil, the oil will not release the moisture and this mixture of moisture and oil will create acid. Because of that only a dryer can remove the moisture from the acid. If that is left in the system for a specific amount of time it will turn into acid and then you need the HH dryers to remove the acid. One of the examples I use in class is that if you report to a building for the first time, you must test the units for acid, and if acid is found install HH dryers. I hope this answers your question and thank you for asking and watching!!!!
@@AirConAcademy Yes it does! Thank you again for these videos! I've started a job as an HVAC controls engineer, and have been binging your videos to learn all about HVAC systems. They've been a huge help!
@@knightcrawler7778 thank you so much for your comment! And I'm glad I could help! I know there have been a lot of other guys that have said that my videos have helped them, and it only motivates me to make more! Thank you so much. Good luck out there and thank you for watching!
why discharge line pipe is bigger compared to liquid line pipe?
naveen m The discharge and are both under the same pressure. But a guest takes up so much more space/room then liquid, the discharge line needs to be bigger. Once it is condensed it can end it needs to be in a smaller space.
Sir if my system have restrictions,what happen to my suction and liquid line pressure in manifold gauge
why discharge pipe is trapped like a u shape?
naveen m i’m sorry, I do not remember seeing discharge lines tripped like a U-shaped. Suction lines yes! And that is to help with oil return. Most of the time you want the discharge gas to go straight into the condenser with no bands or turns.
air conditioning ki certificate mil sakta hai kya
I am so sorry but I do not understand what you are saying. I am sorry
WHO?
Lee o
OK I GIVE UP! how the heck are you mirror imaging your whiteboard? you cant really be writing numbers in mirror image are you?
HA HA I cant tell you all of my secrets BUT let me tell you that my first videos I was writing with both hands and backwards. Then I figured it was easier and faster if I flipped the video, BUT I still write with both hands. LOL As a kid I used to play video games for two people by myself, one with my left and one with my right hand. I also used to do my homework like that. The problem was teachers could NOT read it and would tell me to redo it.
Lol I red all of this !