Bryan demonstrates a in-depth tutorial on how to set a refrigerant charge by Subcool. Read all the tech tips, take the quizzes and find our handy calculators at www.hvacrschoo...
I can’t express in words how helpful videos like this are for those of us who are dedicated, hardworking and most importantly, interested in this trade but may be slower learners than others. I never feel demeaned when I watch these videos and for that I thank you.
Nice presentation . Good to actually see an instructor out in the field not just in a class room . Bryan you give much more than I could have imagined . Cheers
one of the best videos out there illustrating and teaching how the HVAC system works, especially... showing how to set up the equipment, reading an understand the unit in operation, thanks a lot man, you're a excellent... instructor.
Thank you so much for being such a great teacher and having the patience to share your knowledge tirelessly and effortlessly I'm so blessed to be able to have access to your videos. You are really appreciated sir!
1:00 - True to Bryan Orr form, we're told were about to see one thing and then he does exactly the opposite (0:00). Thanks for keeping us on our toes, Bryan. I was anticipating seeing how to charge by Subcool using only temperature probes.
I have no more than 2 years on the hvac trade and from the very first day I start watching your videos, now im on level 2 NCCER Hvac and refrigeration course and my hvac skills skyrocket thanks to this channel, I was nominated as best junior tech on the company I work and all this was because of this channel, there is so much high quality info that you can learn here.
Note the data plate specifies 10degrees sub cool AT the evaporator. Your subcool measurement outdoors doesn’t take into consideration the heat gain from the long uninsulated liquid line. Especially important in attic evaporators with multi story homes.
You make these videos very informative and I greatly appreciate it! I know absolutely nothing about HVAC, and I notice I have a very high interest for it. Sadly, nobody will hire me due to 0 experience. What should I do?
I realize this has nothing to do with a video but you guys said you installed this unit The corrugated pipe that comes out of the ground that the line set is going through is wide open doesn't that allow rain water and/or snow if that happens in that area to get in besides rodents and other pests? I do home inspections and that would certainly be a red flag on the paperwork and I don't like red flags anymore than anybody else does. Lot of unnecessary work. Love the videos though I'm learning a lot.
I’ve noticed these new inverter systems are much more sensitive to overcharging so analogue gauges just have to go. Good quality digital gauges like SMAN are ideal. Not a fan of these probes as you have to be tied to your phone.
Sorry but I am confused. In the video you said that the large line was he true suction line. I thought that most units had a true suction line, usually on the same panel about the 2 service ports but sometimes inside the unit. I thought that the service port suction line changed in heat mode, and that you had to be hooked up to the other suction port (true suction) in heat mode. I thought that the small line liquid port remained the same in both modes.
Good Morning Sir, thank you for all the valued informations, me and my colleges would like to see and hear from you the Signs and scenarios to check the charge of an Air Conditioner Evaporator having a high return air temperature.
Refrigerant standards are changing all refrigerants to the beige color, forcing techs to READ the numbers on the tanks… supposedly reducing contamination of refrigerants.
It might be a 2 ton system, considered "small", but it holds 13 pounds of R410a and that's not small at all. Why so much? My 3 ton only holds 5.5 pounds. Do all heat pump systems use a higher than normal AC refrigerant?
Excellent demonstration! Does bleeding air out of the line as a vapor go against best practices due to the need to keep the blended 410A mixture ratios correct? I would think that bleeding lines with a blended refrigerant would be best done using a liquid. Maybe that’s not a concern.
Accuracy and precision are different. Accuracy, temperature wise, is how close a number is to a standard (actual value). Digital and analogue can give the same number. If that value is accurate (traceable to a standard)both are accurate. Precision on the other hand is how close can the device comes to a value. A wide needle doesn’t allow you to be precise. Precision is the plus minus the instrument is capable of in the design. Digital readings are usually a percentage of the full scale of the measurement being made. Good information otherwise.
When finished charging, close the tank valve and then open the charging hose up so no more liquid is in the hose. Prevents a hose full of liquid into environment.
Could you list out all the tools you used in measuring the refrigerant? I'd like to purchase some of these tools for myself. Edit: I found the gear, thanks!
How much additional charge was added? Why not add an additional temp probe for the OAT and then it will be automatically input? It is a heat pump sitting flat on the pad. I guess there is no freezing happening in your area and if this goes into defrost the water will not freeze on the outdoor coil?
Very helpful. I will need to learn how to use MeasureQuick once I buy the digital tools. I wondered how it takes a measurement of the Freon that is being put in the system. I just have the old fashion digital scale at this point.
Get rid of those shitty plastic caps man, I always put good brass caps on idk why carrier “the inventor of modern air conditioning” doesn’t use good caps!!!???
I think it seems pretty questionable the sub cooling difference between analog gauges and temps vs the app thing… no sub cooling vs 7+ is a huge difference that seems questionable. I’m surprised you showed no concern about that and just trusted the app straight away.. I would more tend to trust the analog simpler testing units than the other.
When pointing out the true suction port, perhaps you could obscure what you are attempting explain a little bit more by more hand/elbow in the way and a more sad camera angle.
Thank you for this video. Originally the blue gauge showed the saturation temperature of 20 degrees F (Pressure 43 PSI R22). At the same time the temperature I measure on the blue line next to the charging port is 80 degrees F. Thus my Superheat is 80 F - 20 F = 60 F. The pressure at the red gauge before charging was 200 PSI that corresponds to the temperature of 102 F. When I charged the system from the R22 recovery bottle, the Superheat changed 75 F - 26 F = 49 F. my red At the same time my red gauge after charging shows the pressure 225 PSI or it is the temperature 106 F and I measured the temperature of the high pressure pipe was 106 F. Question- is my system is overcharged now of I should continue charging it?
great procedure Bryan! accurate and up to standard. we don't have instrument like that in the Philippines I wish we could but we used TANTYAMETER here.
is it ok to have 13.5 subcooling on a 10 +- 2 Target? per manufacturer? Only slightly higher amps? Will it perform better in heatpump by having more freon? in the winder when the volume goes down due to the cold?
Field piece literaly does all the work for you now. It’s so cool how it tells you what is happening and it’s usually accurate and even tells you the fix. We are so lucky 😂
Blue adapter is a tiny orifice that makes liquid charging leaving the tank, vaporize before getting anywhere near the compressor. No risk of "slugging" compressor.
Only pure molecule refrigerants are supposed to be charged as a gas. The mix refrigerants (the ones that start with 4) are mixtures of different molecules. The mix needs to be added to a system as a liquid to maintain correct mixture of the molecules.
R 410A is within one psi of azeotropic mixture. Fractionation isn’t really measurable over an entire bottle discharge… it it the ONLY 4xx series refrigerant with such a close ratio.
