-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
@bluffjumper28323 жыл бұрын
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!
@cruiserodriguez88722 жыл бұрын
Absolutely 💯
@russelzeacantorna301410 ай бұрын
😊
@fastlife8664 жыл бұрын
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 Жыл бұрын
They overcharged that unit Quite a bit
@Matthew-jr1xr Жыл бұрын
Why go to school when you can just watch this guy's videos? Awesome work sir.
@oscarmiranda-ui1ej Жыл бұрын
Thank you. After being on the field and shadowing this makes so much more sense !
@tecniman356 Жыл бұрын
Finally i understand the super heat
@hvacdoc23384 жыл бұрын
Great video and explanation as usual !!
@acservicetechchannel4 жыл бұрын
Glad you liked it!
@altrality2 жыл бұрын
Thank you for explaining the info. It really did help a lot. Keep at it man. You're the best
@APHVAC09134 жыл бұрын
So basically you need those fancy tool's 😁 Great video 👍✌️
@MaMa-qh4dy4 жыл бұрын
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.
@jimbola774 жыл бұрын
Excellent vid!!!! thanks, Craig.
@acservicetechchannel4 жыл бұрын
Glad you liked it!
@brahimabdelsadek95343 жыл бұрын
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.
@cristobalsanchez2030 Жыл бұрын
Hey Craig, can you do a video on how to check sub cooling and super heat on packaged units please
@mikev.10344 жыл бұрын
Great video. 👍👍
@acservicetechchannel4 жыл бұрын
Thanks for the visit
@ludwig63322 ай бұрын
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?
@betocruz2589 Жыл бұрын
You guys are the best😊
@JesusZendejas-nz5ni Жыл бұрын
Is the indoor wet bulb temperature just a reading of the temperature inside the return ? Or is a special tool required to calculate it ?
@leonechevarria3594 жыл бұрын
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....
@JohnQPublic3453 жыл бұрын
Check filter driet
@dustinmarkmendoza23134 жыл бұрын
new subscriber, your video really helps me. better than SJ*C school
@acservicetechchannel4 жыл бұрын
Happy to hear that!
@dustinmarkmendoza23134 жыл бұрын
AC Service Tech LLC do you have a video for a walk in cooler? thanks
@mystory11622 жыл бұрын
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.
@corruptedbrain6 Жыл бұрын
i just ordered some of those charts !
@paullenton20764 жыл бұрын
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 Жыл бұрын
Imperial is definitely confusing.
@AnimateInstinct3 жыл бұрын
Great video! Thank you 👍
@acservicetechchannel3 жыл бұрын
Glad you liked it!
@zekenzy64864 жыл бұрын
Great Video. Have a nice weekend . Thank you for sharing ^_^
@acservicetechchannel4 жыл бұрын
Thank you! You too!
@nikosgood47744 жыл бұрын
This is awesome 👌 thank you!
@acservicetechchannel4 жыл бұрын
You're so welcome!
@aamirdilshad41222 жыл бұрын
Very useful information thanks dear
@dwightvelez83574 жыл бұрын
Super great!!
@acservicetechchannel4 жыл бұрын
Thank you! Cheers!
@KamalSingh-dd4ou4 жыл бұрын
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
@Pibs252522 күн бұрын
407c has similar pressures, I’d change the filter drier and install a 407c txv
@mikeblackpoetry52485 ай бұрын
What tool are you using for temps?
@ArqualityShuttersCom Жыл бұрын
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
@Funboyy1233 жыл бұрын
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 Жыл бұрын
That's exactly what I thought, lol which would be more accurate? Maybe look at the overall picture to determine?
@hvacmania8323 Жыл бұрын
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
@bobward7489Ай бұрын
The I door wet bulb changed, shifting the readings
@jimbola774 жыл бұрын
are those digitals accurate! do u need to calibrate them? thanks.
@BallisticBilly3 Жыл бұрын
Would you get the same wet bulb temp reading at the return air vent and in the duct-work??
@JohnQPublic345 Жыл бұрын
Can you take the IDWB temp at the main return?
@foodtravelxp242 жыл бұрын
Can you tell me that r134a and r404 gas target superheat chart. -temperature and +temperature are both gas.
@666miguel99 Жыл бұрын
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 ?
@milanlipovic73494 жыл бұрын
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?
@JohnQPublic3453 жыл бұрын
If refrigerant is low, oil that's supposed to lubricate compressor will get pumped out and into lineset
@michaeldreves50724 жыл бұрын
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
@hvacdoc23384 жыл бұрын
Michael Dreves Take your readings again. Something seems off. If you have a 95psi your coil would freeze. 95psi is a 28° evaporator temperature.
@matt_in_maine4 жыл бұрын
Does the digital manifold connect with the job link prob compared to the dual in duct psychrometer?
@IsaacHernandez-ow3sn11 ай бұрын
Do yall have an app
@nbctcp34508 ай бұрын
1. how to find target superheat for single split aircond R32 in Celcius 2. do u hv chart for it
@bayouflats50543 жыл бұрын
Thanks. What happens when a fellow employee insists on charging by sub-cool method on systems with pistons ?
@Sesamestreet9080 Жыл бұрын
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 Жыл бұрын
@@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 Жыл бұрын
@@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_drrich2 жыл бұрын
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 Жыл бұрын
41 degrees makes sense. Yes . Depends on the other variables
@irham985610 ай бұрын
👍👍👍
@abdulfataw21194 жыл бұрын
Sir pls do u have a book
@acservicetechchannel4 жыл бұрын
Good Morning, We have a Paperback - Refrigerant Charging and Service Procedures for Air Conditioning on our website! www.acservicetech.com/store
@hbo77992 жыл бұрын
Can these two parameters also be used in the AC car service?
@hbo77992 жыл бұрын
for r134a?
@mnew2134 жыл бұрын
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
@JohnQPublic3453 жыл бұрын
Depends on outdoor temp. It will change pressure in an off unit
@acrepairnearme4 жыл бұрын
Good beard! But! Craig, you are still young. Without it, you will look even better.
@hvacplayer32384 жыл бұрын
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 жыл бұрын
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
@acservicetechchannel4 жыл бұрын
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 жыл бұрын
My address is 2408 Windridge Ct, Apt#1, Rockford Illinois 61108
@suwajmarek Жыл бұрын
👌
4 жыл бұрын
That card your holding.
@guntheraveusa8772 Жыл бұрын
Gz... HOW LOW IS THE VAPOR LINE TEMP GOING TO GO 😆😂
@aaronhickey4879 Жыл бұрын
Flip hot and neutral, please. The fan is blowing in the wrong direction.
@acservicetechchannel Жыл бұрын
Thats just what it looks like on video. everything is correct!