R-22 and R-410A Operating Pressures on Air Conditioners! Checking the Charge!

In this HVAC Training Video, I show the R-22 and R-410A Range of Operating Pressures on Air Conditioning Systems! I show why we Measure Pressures and Temperatures When Checking the Refrigerant Charge of an Air Conditioner! 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 #operating #charge #airconditioner #pressure #checking #acunit
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[@davidisaacs9469]

I have 38 years in residential construction. I'm currently in hvac night school. I get as much or maybe even a little more out of your videos and book. I just wanted to take a second to thank you.

[@acservicetechchannel]

David, thank you for your encouraging note!

[@ZeldaxLegacy]

Same, friend. Not as many years as you,but this channel is far more educational than my schooling is. GL on your new adventure!

[@turboskywalker9108]

Yeah going to class doesn't teach you the actual work that needs to be done it's all legality and policies and what NOT to do 😅

[@jollyscaria1922]

R22 suchion 65t70 dis.. 270 320... aR410 suc..110 to 125 . Dis 430t0450..

[@Voyager23B]

He is the best! I purchased his manual and it has been my go-to reference for HVAC for years! I always refresh myself by watching his videos.

[@shawnpierce6785]

Your video helped me understand pressures. I shared it with a buddy of mine. We both wanted to give you a big THANK YOU!

[@vernroach3413]

Excellent videos...I use them as refreshers...Retired, but still working the trade occasionally...Keep moving guys, keep using your brain and learning...Keeps you younger than those who don't..My only wish is they'd land on one refrigerant for the AC.

[@RaulGonzalez-lb1ok]

Very helpful! I’ll tell you this! The hvac company’s I’ve worked for before never taught me this. N they never checked Freon like this guy!! Wow!!!

[@resurgensix]

Thank you Mr Mig. These are basics an apprentice like myself NEEDS to know. Your content is the first I have ever seen to identify these targets. Thanks again. Loving your book!

[@acservicetechchannel]

Robert, loved meeting you over at Bryan's place. You are a heck of a guy and the company where you are at is extremely fortunate to have someone like you! Well ballanced, intelligent, determined, sales experience, professional, respecful, the list goes on!

[@jpbarista3253]

Best video out there explaining the pressures. Thanks 🙏🏻

[@flatearthautopilot9892]

Dude, this is the best tutorial video I’ve seen. Thank you SO MUCH

[@joshstuckey9977]

Did residential instal as a kid now I’m on a offshore platform as a electrican and one of my responsibilities is keeping the 30 year old AC running and lord it’s whooping me but I appreciate your help on this

[@bayouflats5054]

I’ve been relying on your info since learning HVAC at fast paced multi family apt complex maintenance dept. , as this particular industry doesn’t lend itself to exacting practices. Appreciate

[@shawnpierce6785]

Same. This video alone was a breath of fresh air for my brain.

[@Danny-fs1hk]

This guy is an excellent teacher

[@johnpark7990]

Thanks for ❤. That is the best explanation of the sub cooling and super heating in the air-conditioning system.

[@Samir72]

Very well explained, Thanks Craig!

[@doorguru168888]

Thanks! I'm starting to grasp it. Excellent video!

[@user-kt2hb8xr3p]

Great job, thank you brother. You are so talented

[@jimmysegovia2688]

thanks, Craig for sharing!!!!! you're the best man!!!!...

[@antoniolaracuente437]

Great job Mister Rogers thank you for all that information

[@acservicetechchannel]

Ha ha, nice, thanks!!!

[@user-gc1gj2hm9n]

thanks for the sharing knowledge. very Helpful

[@theninetwo7266]

MAN thank you for taking your time to teach

[@acservicetechchannel]

Glad you enjoyed it!!!

[@maximustitan8171]

This a very nice art and animations on how home AC works. Thank you.

[@Bruce19]

Great explanation!! Keep up the great work

[@acservicetechchannel]

Thanks a lot Bruce!

[@chasdenver]

Craig, I just purchased some of your troubleshooting guides, HOPE, they are as good as your video instructional video's!!

[@acservicetechchannel]

Well, we put a lot of work and testing into those so hope you enjoy them. They presently have 4.7 stars out of 5 on amazon. Let me know what you think after using them for a bit!

[@cesarbernal3648]

Very informative! Thank u!!!

[@johnhess2754]

my friend, your a wealth of knowledge, thanks so much

[@acservicetechchannel]

I appreciate your support!

[@raysoucie489]

VERY good Info.----- THANKS !!!!

[@clemochoa6430]

Gracias Professor muy buen CONSEJO 🙏🙏🙏👍👍👍😍

[@motactr8018]

Great video! 👍🏽

[@caryandgrace]

Thank you sir! These are essential viewing for new techs.

[@acservicetechchannel]

Thanks a lot! Show them to your apprentices!

[@realestateservicessaleshea99]

Thanks again for the videos, always appreciated! 🍺🍺🍺🥃🥃⛳🎳 Stay safe. Retired (werk'n)keyboard super tech. Wear your safety glasses!

[@pizzle1011]

👌🏾👌🏾👏🏾👏🏾 always a good refresher watching your videos. Easy to understand and thorough. Thanks

[@acservicetechchannel]

Thank you so much!!!

[@lamberto6405]

Great content and I've been searching for a log time! Thanks!!! I had a tech check my A/C on an R410A Rheem unit. As soon as he saw the high side was 320 and touched the small line and said it was too hot (it was on the hot side vs warm) he said that the coil was not good. It was 95 degrees out. The coil seemed clean and it was clear and in good condition (no corrosion). We hosed down the coil and the temp went down but he re-confirmed the coil was bad. Can a coil be bad if it seems okay (air flows through is that the fins look great)? I trust the A/C rep but for my own learning.

[@batjiyasanthos5526]

Very informative lesson. Thank you sir

[@acservicetechchannel]

You are welcome!

[@KET1979]

very good tips

[@muhammadusamakhan5295]

Very impressive sir

[@douglieberman6406]

R 22 or R 410a can be checked with ONE gauge as though you are charging a WINDOW UNIT (package unit) whose copper tubes start having low pressure and build up frost on them. You tap into a small copper line with a tap and use one gauge and check the one pressure for a specific temperature.

[@thesilentonevictor]

Great information 👌

[@acservicetechchannel]

Thanks a lot Neilvester Victor!

[@djkaneck1]

Well done

[@abecontreras7940]

Great video.. I been running into problems like not being able to get my low side above 100 psi.. can you make a video explaining why and solutions

[@sivasagarvemula534]

Hi nice video please make videos on r407c ,405 and 134a also about pressures

[@khuongvtube]

I saw many articles about min. of 10 degrees superheat at evaporator suction line and 20 degrees at near condenser to avoid flooding back from compressor manufacturers. So my question is which one we should go by, In Texas, ambient temp can be 75f in the morning and 100f in the afternoon. My ac superheat taken at suction line on the outside unit can be 5 in the morning and 20-25 in the afternoon. I keep my thermostat setting at 77 degree throughout the summer. If I depend on the target superheat from my outdoor dry bulb and indoor wet bulb temp, it could be 0 superheat sometimes according to the chart.

[@douglieberman6406]

Because R 22 and R410 a on the PT chart has pressures as though they are mixtures I would use them in such places like a window unit that is low on freon, like a small package unit as though as you only need to check one pressure for specific temperatures.

[@Garyganeu]

If you think that s a lot to think of, try charging a low ambient unit with a accumulator and a receiver when its o OA.

[@ronnyt9279]

Thank great info

[@wasimedoo7994]

Very good information bro what is the replacement for r22 Freon and what would be the gage reading thanks

[@ejohnfall]

Good information like always

[@acservicetechchannel]

Thanks so much!

[@farabirahmannaim181]

Good informasirion

[@patbrock7460]

The reply was we only use sight glasses in refrigeration not AC.. When I started doing AC in the early 70's many Carrier units came with sight glasses, car AC came with sight glasses. If you have say 10 degree sub cooling you should have a solid flow of liquid in the liquid line.. I do realize units with multiple rows of small tubing are easy to overcharge.

[@davidnunez7889]

Awesome video Craig great information

[@mahmuedsalah]

If the temperature allows, pour cool and super heat in the air conditioner, freon r22 and r410

[@morallyinsane7639]

Unfortunately in the field, it’s quite different then in a controlled classroom setting. Let’s assume the unit was installed correctly for the space, then this is a good lesson. However in the field we all know a lot of times that is not the case. High efficiency condensing units run cooler and CFMs can effect TXVs. So the easiest way is to use your suction gauge and check the charge under a high load condition.

[@taiwanluthiers]

I notice what looks like a capillary tube from the condenser before it leads to the liquid line. I'm not sure what it's there for but it really causes the liquid pipe to feel cold. I got a mini split and I guess things must operate differently in a mini split.

[@anthonybarragan1687]

The pressure windows that you state for both high and low side pressures work for residential, commercial, and industrial units? Or only certain HVAC system settings?

[@Jason-qe4tp]

On your quick reference cards the troubleshooting ac systems card, what do you mean by capacity on the chart? Btw these are awesome...like my own cheat codes

[@Jason-qe4tp]

Oh yeah also are you making a furnace and a boiler quick cards in the near future....like b4 heating season cause ill buy them

[@monteglover4133]

I am a 40+ year HVAC&R service tech, I usually use temperatures when working on space cooling systems I work on have 4 different refrigerants, in addition to refrigeration systems

[@abulhobatte151]

Question here man so is this R22 PSI values for all split type ACS whether 12000btu 18000btu or 24000btu etc or is he talking about HVACs here

[@joshuaramos9676]

Hey man I’m new to all this and I wanted to know what my low side and high side PSI should be at my temperature outside are between 80-100f

[@Abdullah-hc1cz]

If it capillary tube is using for the metering device,what methode should it use for charging? Is it superheat or subcooling?

[@neutrodyne]

If a system is properly charged should the low line coming into the compressor be sweating on a hot day while the system is running?

[@artojokinen1700]

Would you have similair info on R32? R410A is getting uncommon. New installations tend to be R32.

[@brianosegueda3622]

Great stuff as usual Craig! Lately, we been using R 427 and R 407 as replacements for R22. However, our gages only have the common readings: 410, 404, 22. How similar or different are the temperatures for 427 and 407 to R22?

[@TheDave5619]

You can download a PT chart app on your phone and input the psi on your low gauge and set it with the r427 or many others and it should show the temperature of the that refrigerant. And you can compare

[@tttota5421]

Can you use 407 to any brand and do you usually clean the line set Bc this guy wants to charge 200$ per pound on R22 🤣 witch is not worthy

[@brianosegueda3622]

We use 407 as replacement for R22, however, we do NOT use it on heat pumps because R407 is a blend.

[@juntang72]

@@brianosegueda3622 why can’t blended refrigerant be used in heat pumps? R410 is being used widespread in heat pump ,it’s blend too

[@sawdust85222]

@@brianosegueda3622 410a is also a blend. Will you elaborate on why you don't use 407 on heat pumps?

[@Californicate1]

If the low pressure sensor is open due to low charge , how do you allow it to run prior to checking charge ?

[@joeneal21]

Working on a unit with a 4-5 degree subcool when I add refrigerant the liquid line temp increases with the head pressure still giving 4-5 degrees SC. I change Evan filters. I replaced condenser fan motor that was overheating. What am I missing here?

[@lucdumouchel3864]

Hi. I was working on a commercial A/C 12 1/2 tons. I checked the CFM. I'm close to 5000 CFM. Lines are about 60 feet. It's a un it with 2 compressors 2 Things 1: When I try to get 10 subcooling, it may play between 3 degree to 12 degree. 2: I can't get a superheat between 10 to 15 degree. it stay between 22 to 25 superheat. The suction line outside is about 20 feet. My questions are: The fact that the subcooling is changing that much, should I change it? Also: if the superheat is that hi, is it another reason to change it?

[@yatskie1632]

does these value applies to 1.5HP split type ac that is running R410A?

[@manna5610]

What the low ands high ranges for heating. Inside temp, 70 and outside temp 30. AC works fine but the heating does not. Duct temp gets up 90 and then gets cold. EH temps n after a few min. Just had the R22 topped of. the HVAC tech said, pressures are fine, did not resolve the problem. this is 2 x now on the same problem. Not defrosting, OD fan is still running. It might be a bad DF board? I'll check it later today. Or the pressures are still low? That is why I'm asking. thanks!

[@timdestasiohvac]

Great vid. I think we should STOP thinking and learning and talking refrigerant pressures, and just use saturation, line and air temperatures.

[@acservicetechchannel]

Exactly!!!

[@bobbyyoung2831]

How do you charge the unit when it start cycling because it doesn't have enough freon in it won't stay running so how do you charge it

[@joselicop872]

Should we charge R410a using liquid or gas vapor to the suction line?

[@markgallagher1376]

What if I have TXV metering, but my condenser nameplate doesn’t have sub cooling target? The manual doesn’t show it either.

[@Ojeramup12]

Clear as mud.

[@acservicetechchannel]

It takes a while to understand. Its not as simple as just pressures, thats for sure!

[@Ojeramup12]

Totally agree.@@acservicetechchannel

[@douglieberman6406]

I know that putting switches in parallel in electricity is actually a short circuit when closed! Just to add a point somewhere!

[@robcerda4602]

Had a question do you have a book on electric heat

[@acservicetechchannel]

Not at the moment, just the new Inverter mini split book and the air conditioning/refrigerant book at www.acservicetech.com thanks!

[@spartan5106]

great video! Thank you

[@acservicetechchannel]

Glad it helped!

[@nickledimez4012]

Thank you! Do you have a link to the tools you are using in regards to the digital meters? Thanks again!

[@acservicetechchannel]

I have all the links over at www.acservicetech.com/tools

[@piezomotor]

Hello, thank you for this video. I have a question - my R22 bottle has the red and the blue valves but my R22 manifold has the yellow input house. Do you know by any chance where I connect yellow house? To the red or the blue valves?

[@sawdust85222]

I would suggest not connecting them to anything!

[@carbondioxide9940]

Is this with the system running ?

[@patbrock7460]

Question some people love sight glasses, some people say they don't work well with 410a ??

[@acservicetechchannel]

We don't use sight glasses for air conditioning, only refrigeration. In ac, we measure subcooling to see not only if the refrigerant is in the fully liquid state but how many degrees of subcooling are present, thanks!

[@pryanikfromrf4459]

Да я с тобой согласен. Минеральное масло не дружит с синтетикой..... у меня была проблема: агрегат 64года на фреоне 12, вот я вспотел ( запчасти нет в продаже уже очень давно)

[@Jpriatna]

How to determine super heat besides reading

[@liudxdx]

4:44 what’s the yellow device?

[@nsahar4214]

If you have a 3 ton blower and 3.5ton AC is that system going to freeze up? Thanks

[@jasonfields4663]

Txv or fixed?

[@TheEmoLab]

Is it possible to know how many pounds are in the unit

[@kariesistansteckend2196]

a mini Split only for heating. should i mount it on the floor or on the ceiling ? or in the middle ? Can someon answer the question ?

[@amealnet2495]

Floor.

[@amealnet2495]

I’m not going to live long enough to understand the hvac technology

[@stephwaylonwells3218]

👍

[@PhilipAlonzo]

How many years should freon last my unit is like 4years old maybe 3 and its blowing a lil cold and warm could it be freon or capacitor?

[@PhillipCooperNCState]

Refrigerant (aka freon) will out live the equipment... If a leak develops within the system, the refrigerant will leak out at a rate determined by the size of the puncture. A slow leak can take many months before the comfort level is noticeable. And most likely, the capacitor has nothing to do with your situation.

[@abdalqadr1]

❤❤❤❤

[@IndependenceCityMotoring]

What if my my label doesn't specify the TXV rating? Has other pieces of info but not a TXV rating.

[@acservicetechchannel]

It should say subcoolin grating on the outdoor rating plate or on the under side of that shroud. If it doesn't and it is a single speed unit, 11 degrees of subcooling can be used, thanks!

[@MaMa-qh4dy]

@@acservicetechchannel My older Trane heat pumps don't give a target subcooling. Instead, the service facts include a graph chart plotting liquid line temp (horizontal X axis) vs liquid line pressure (vertical Y axis). Within the graph is a slight arc line that indicates the proper charge. At the intersection point of your X and Y values on the arc line, is below the arch line, then add refrigerant. If your intersection dot is above the arch line, then recover refrigerant. I don't know why Trane does this method. Seems like a little extra work.

[@Houssem0880]

Thank you appreciate it can you please ad Arabic caption it will be good

[@derekprreira3214]

I have a LG split unit, it was cooling the previous night , but today morning it wasnt cooling at all, so i checked the suction line is warm and the liquid line is hot at the outdoor unit. What could be the problem. Kindly advice

[@xiangqian6688]

具体要现场看一下，不制冷有很多原因

[@douglieberman6406]

Putting switches from negative to positive is a short circuit when closed!

[@impossiblemans]

I hope in the future there will be an Indonesian translation

[@dennisqwertyuiop]

A coil with capillary tube,,is that the same as a piston ?

[@practicemakesbetter7132]

A capillary tube or a piston controls the amount of liquid entering the A coil by restricting liquid flow, if you overcharge a system the low side gauge pressure will be above normal and the low side gauge pressure will be above normal. A TX valve controls the flow of liquid with a temperature sensing bulb, the TX valve maintains a steady A coil temperature, as a result the low side pressure remains relatively stable, even if the system is overcharged.

[@dennisqwertyuiop]

Yes I know that they only talk about piston and txv valve,, so is cap tube same as piston?

[@acservicetechchannel]

Yes cap tube and piston both fall under the term "fixed orifice" but the piston chamber can bypass refrigerant through and around the piston itself when the refrigerant flows in the other direction where the cap tube needs an external bypass, thanks!

[@sachinchawla1368]

नमस्कार सर जो वीडियो में जो टूल्स दिखाते हो वह ऑनलाइन अमेजॉन पर उपलब्ध तो होता है पर इंडिया में नहीं मिल पाता। इससे बहुत तकलीफ होती है न्यू ट्रलस नहीं मिल पाता है और काम करने में काफी दिक्कतें होती है Hello sir The tools shown in the video are available online on Amazon but are not available in India. This causes a lot of trouble, the new trullus is not available and there is a lot of difficulty in working.

[@survivaldavid9802]

Am looking for a job plz in any HVAC companies

[@bsiah9073]

still have no idea what all means. sounds alien to me lol

[@Zawo254]

My 410-A Says 200 Blue and 400 Red😬😬😬

[@richport5593]

😬😬😬😬😬

[@Brokefootchuck]

My boss says mix 22 with 407c. I hate it. According to the maker you can add up to 25% of total charge without adding oil but the saturation temps are too different for my liking. There is no good replacement imo.

[@blackericdenice]

You guys really try to make this harder than it is. My r22 unit was 60 psi and was freezing up. I pumped one can of r134 in there and it’s not freezing anymore. I put r134 in there because a tech told me he didn’t use r22 anymore. He wants me to pay $9000 for a new unit when all I need is Freon.

[@junirtgalindez1745]

Junirt

[@AnilKumar-ji1ux]

Please Hindi language channel create sir