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Finding Target Superheat to Check the Charge of an R-410A AC Unit!

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In this HVAC Video, I Show How to Find The Target Superheat on an R-410A Air Conditioner with a Piston Fixed Orifice Metering Device. I show how to Compare the Target Superheat to the Actual Superheat while Checking the Refrigerant Charge with Compound and Digital Manifold Gauge Sets. A Psychrometer is Needed to Find the Wet Bulb Temp for Target Superheat. I explain how to determine if the unit is undercharged, overcharged, or correctly charged. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
Tools Used in This Video
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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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Опубликовано:

15 авг 2024

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Комментарии : 85

@acservicetechchannel 4 года назад

-Join our updates list for an email strictly from us for new videos, articles, products and website features! www.acservicetech.com -Our Website has FREE Videos, Calculators, Podcasts, Articles, Tips, Quizzes, Q/A: www.acservicetech.com -Facebook Tips: facebook.com/acservicetech -Tools we use, Our Book, Workbook, and Quick Cards: www.amazon.com/shop/acservicetech -Our E-book, Paperback, Workbook, Quick Cards, Powerpoint, www.acservicetech.com/ac-book -Our E-book: play.google.com/store and search "ac service tech" -Spanish Book & E-book: www.acservicetech.com /store

@bluffjumper2832 3 года назад

Awesome! Finally, someone that can talk you through the whole system and procedure flawlessly and they're easy to follow! Kudos on making a great teaching video where each word is understandable!

@cruiserodriguez8872 2 года назад

Absolutely 💯

@russelzeacantorna3014 9 месяцев назад

😊

@fastlife866 4 года назад

Had a System today. 0 superheat 30 subcooling. Had to take out 1lb of refrigerant to get the superheat on point. I always use your chart.

@Sesamestreet9080 Год назад

They overcharged that unit Quite a bit

@Matthew-jr1xr Год назад

Why go to school when you can just watch this guy's videos? Awesome work sir.

@oscarmiranda-ui1ej Год назад

Thank you. After being on the field and shadowing this makes so much more sense !

@tecniman356 Год назад

Finally i understand the super heat

@hvacdoc2338 4 года назад

Great video and explanation as usual !!

@acservicetechchannel 4 года назад

Glad you liked it!

@altrality 2 года назад

Thank you for explaining the info. It really did help a lot. Keep at it man. You're the best

@jimbola77 4 года назад

Excellent vid!!!! thanks, Craig.

@acservicetechchannel 4 года назад

Glad you liked it!

@APHVAC0913 4 года назад

So basically you need those fancy tool's 😁 Great video 👍✌️

@MaMa-qh4dy 4 года назад

No. You can use the compound manifold gauge set (analog dial pressure gauges) and less expensive psychrometer to read the temps. No need for digital instruments.

@mikev.1034 4 года назад

Great video. 👍👍

@acservicetechchannel 4 года назад

Thanks for the visit

@betocruz2589 Год назад

You guys are the best😊

@dustinmarkmendoza2313 4 года назад

new subscriber, your video really helps me. better than SJ*C school

@acservicetechchannel 4 года назад

Happy to hear that!

@dustinmarkmendoza2313 4 года назад

AC Service Tech LLC do you have a video for a walk in cooler? thanks

@brahimabdelsadek9534 3 года назад

Thanks for the effort you're making.learning with you makes me proud.i find it hard to understand all.wanna get rid of the French language.have a nice day.

@JesusZendejas-nz5ni Год назад

Is the indoor wet bulb temperature just a reading of the temperature inside the return ? Or is a special tool required to calculate it ?

@ludwig6332 Месяц назад

I am trying to wrap my mind around what is happening to the gas if the SH is way low, I.e. you said "if low to 5 or so, we want to make sure we're not sucking liquid back too the compressor". So that would be overcharged robbing volume? causing a lack of space for expansion to take place?

@DaveJutsu 3 года назад

Great video! Thank you 👍

@acservicetechchannel 3 года назад

Glad you liked it!

@nikosgood4774 4 года назад

This is awesome 👌 thank you!

@acservicetechchannel 4 года назад

You're so welcome!

@leonechevarria359 4 года назад

I have replaced a heat pump compressor(2ton) that had r-22 and i filled it with mo-99... replaced filter dryer, did a nitrogen pressure , pulled a good vacuum... the evaporator is a fur down unit (pancake) i checked both piston... blowers are ok ..the problem I have is that the compressor making a hissing noise, Low side 115 psi , 15 sh , vsat 71.4 , slt 86.3....hi side 168, -OL sc (no subcooling), 85 LSAT , 86.6LLT....had a a/c company called in and said was the valves 🤔 went ahead a replaced it with another compressor same problem no enough super heat/no cooling properly... Did replaced filter from the beginning...coils inside evaporator and condenser clean. I KNOW THERE'S A PROBLEM BECAUSE NO COOLING PROPERLY/HAVE USED DIGITAL AND ANALOG GAUGES BUT DON'T HAVE PROPER READING...I HAVE OVER CHARGE AND UNDER CHARGE IT ON PURPOSE TO SEE BUT CAN'T FIGURE IT OUT....

@JohnQPublic345 3 года назад

Check filter driet

@aamirdilshad4122 2 года назад

Very useful information thanks dear

@cristobalsanchez2030 Год назад

Hey Craig, can you do a video on how to check sub cooling and super heat on packaged units please

@corruptedbrain6 Год назад

i just ordered some of those charts !

@jimbola77 4 года назад

are those digitals accurate! do u need to calibrate them? thanks.

@zekenzy6486 4 года назад

Great Video. Have a nice weekend . Thank you for sharing ^_^

@acservicetechchannel 4 года назад

Thank you! You too!

@mystory1162 2 года назад

Craig, I wish you explained in this video better to its listeners WHY you are checking the WBT in the return at the air handler and not the DBT. So let me explain the missing info. You only check the WBT if the relative humidity is above 70% or below 20%. Anything in between you are to check the DBT at the return.

@paullenton2076 4 года назад

Great channel Craig, I am a mature student after many years as a plumber and a move from the UK to Australia I have moved onto HVAC, my question. Do you have any plans to do a metric version of the book ?

@firmbutton6485 Год назад

Imperial is definitely confusing.

@mikeblackpoetry5248 5 месяцев назад

What tool are you using for temps?

@dwightvelez8357 4 года назад

Super great!!

@acservicetechchannel 4 года назад

Thank you! Cheers!

@ArqualityShuttersCom Год назад

Exactly where does the psycrometer needs to be place on the evaporator coil to find the temperature can it be place just outside the box

@michaeldreves5072 4 года назад

I have a question if you have a 410a system with a txv and you have good temperatures like say 42 degree evap coil temperature and 11 degree SH and 8 degree SC but have low suction pressure of 95 psi and a head pressure of 305 psi is this a system that has issues like air flow or other problems

@hvacdoc2338 4 года назад

Michael Dreves Take your readings again. Something seems off. If you have a 95psi your coil would freeze. 95psi is a 28° evaporator temperature.

@BallisticBilly3 Год назад

Would you get the same wet bulb temp reading at the return air vent and in the duct-work??

@KamalSingh-dd4ou 4 года назад

GREAT VIDEOS OF YOUR THANK YOU SIR can you do video or share info about which refrigerant is best replacememt for R22 and what needs to be done when replacing refrigerant

@Pibs2525 11 дней назад

407c has similar pressures, I’d change the filter drier and install a 407c txv

@Funboyy123 3 года назад

Why were the digital and analog readings so different? Super heat on Analog was 14 and Digital it was 7.5. Why is that?

@guillermotejeda692 Год назад

That's exactly what I thought, lol which would be more accurate? Maybe look at the overall picture to determine?

@hvacmania8323 Год назад

Because it fluctuates depending on indoor / outdoor temps . Maybe after removing analog gauges and attaching digital ones outdoor indoor temps weren’t exactly the same etc

@bobward7489 Месяц назад

The I door wet bulb changed, shifting the readings

@JohnQPublic345 Год назад

Can you take the IDWB temp at the main return?

@666miguel99 Год назад

I got a question, why are all my wet-bulb temperatures below 49 degrees Fahrenheit. I'm taking my temperature right at my condenser return. Is that not what I'm supposed to take it from ?

@matt_in_maine 4 года назад

Does the digital manifold connect with the job link prob compared to the dual in duct psychrometer?

@nbctcp3450 8 месяцев назад

1. how to find target superheat for single split aircond R32 in Celcius 2. do u hv chart for it

@foodtravelxp24 Год назад

Can you tell me that r134a and r404 gas target superheat chart. -temperature and +temperature are both gas.

@IsaacHernandez-ow3sn 11 месяцев назад

Do yall have an app

@milanlipovic7349 4 года назад

I’m fresh out of HVAC school so this might be a stupid question but I believe I heard that if your suction line temp is 65 or above that it’s bad for the compressor or maybe it’s just Copeland compressors?

@JohnQPublic345 3 года назад

If refrigerant is low, oil that's supposed to lubricate compressor will get pumped out and into lineset

@bayouflats5054 3 года назад

Thanks. What happens when a fellow employee insists on charging by sub-cool method on systems with pistons ?

@Sesamestreet9080 Год назад

We’ll sub cooling can tell you something also if you reading a piston system . Too high of a sub cooling can tell you it’s over charged so your next move would be to reduce sub cooling,

@bayouflats5054 Год назад

@@Sesamestreet9080 appreciate reply, but sub-cool method is for TXV system and superheat is for piston/ fixed orifice. And “I” find these scroll compressors to be very finicky and don’t last if not pretty much dead on. Oh well, he’s the sup, so it’s on his head, but man, in Deep South, summers are murder on units already, if a person is there working/ charging it…., why not simply do it correctly? 😖🤷‍♂️

@Sesamestreet9080 Год назад

@@bayouflats5054 definitely charge by superheat with piston, but knowing both will let you know what’s going on with the system , sub 6 on superheat means you’re flooding the compressor

@Samlol23_drrich 2 года назад

On my old r22 system with a piston, is it true that if the vapor line temperature at the condenser is 41 degrees, (83 dry bulb for what it’s worth) the MOST my superheat can be is 9 degrees or so if my system is working properly? (Since the evaporator coil isn’t freezing, I took 41 and subtracted 32 to get 9). I have two 33 year old Armstrong air units and both work well. Clean coils, good air flow etc. I do not want to hook any gauges to them, there is just no reason. The downside of creating a schrader valve leak outweighs any knowledge I would get, since they are working very well. Delta T indoors is about 19 degrees which is just fine for me. I find this stuff very interesting. Thanks in advance.

@JohnQPublic345 Год назад

41 degrees makes sense. Yes . Depends on the other variables

@abdulfataw2119 3 года назад

Sir pls do u have a book

@acservicetechchannel 3 года назад

Good Morning, We have a Paperback - Refrigerant Charging and Service Procedures for Air Conditioning on our website! www.acservicetech.com/store

@hbo7799 2 года назад

Can these two parameters also be used in the AC car service?

@hbo7799 2 года назад

for r134a?

4 года назад

The cards they sent me have a smudge mark across the 80 degree mark it looks like green paint. I tried to scratch it of but it made it worse

@acservicetechchannel 4 года назад

Please email us with a pic of the card to info@acservicetech.com and if you ordered it on amazon or our website and we can send you out a new one, thanks!

4 года назад

My address is 2408 Windridge Ct, Apt#1, Rockford Illinois 61108

@mnew213 3 года назад

Hi Craig, I have a R410a unit - model # YCJD36S41S1, the unit pressure is 175 PSI when the unit turned off, do you know if this pressure is correct? Thanks

@JohnQPublic345 3 года назад

Depends on outdoor temp. It will change pressure in an off unit

@irham9856 10 месяцев назад

👍👍👍

@hvacplayer3238 4 года назад

I wonder if I could get your opinion on this r410a refrigerant My sub cooling is high, unit calls for 10-12 but it’s 18 (it’s a TXV system) super heat is .8-1.2 Temp split is 18-20 Suction line temp is 38-40 (118 psi) Liquid line temp is 75 (288 psi) Outdoor temp is 77 Indoor temp is 77 Blower is set to 400 cfm, 3 ton Filter, blower, evaporator, ductwork is all clean, all new units installed a few months ago

4 года назад

That card your holding.