Compression Ratio

[@tawfiktawil925]

We can’t thank you enough for your videos

[@00ABBITT00]

it's nice to hear someone who actually enjoys teaching, speak. my "trade school" doesn't have one instructor that cares....

[@ibanezortiz4494]

I’m in the same boat pal, my teachers don’t give a -//#% about teaching pay almost 9 k for this course that doesn’t work

[@kirtkincaid5662]

The guys at the top of the industry never stop learning. Period.

[@michaelelliott3456]

I've learned years worth of knowledge in a very short time with these videos. You sir are a saint.

[@Dimbimbus]

Been watching b2b2b2b & cannot say enough thanks, love the style of teaching & using real scenarios to keep you on your toes

[@CM-ou4zr]

Wow the guys and gals at this company are so lucky. My career started with no training and I had to search out the knowledge myself and these guys train in house! Wow! Setting an example for others to follow thank you

[@thanappans3384]

Very nice to improve the HVAC technical knowledge

[@Grinderluke]

Amazing! Always making me a better tech even after a decade

[@jasonostrowski3972]

Thanks very much Bryan. It’s great to be part of such a good thing. I’ll be taking my contractors License test next week and you sir are big part of my learning. Not to mention I am 3rd generation so I grew up in it.

[@popo_53]

I've been in commercial refrigeration and hvac for over a decade now and as much as I love the physics and theory behind refrigeration I've learned to throw most of it out the window because its all based on new equipment and optimal conditions. Its a guide but a lot of times can get you into trouble when it comes to diagnosis. At the end of the day there's no replacement for experience and a good friend or co-worker to call when a system is kicking your ass.

[@Grinderluke]

You could be that guy that people call when they are stuck!

[@Anzarvitalbio]

Before you do your troubleshooting you need to understand what you do, learning adds value to experience

[@popo_53]

@Anzarvitalbio I could publish a book long response but I'll save you the suspense. Most women take anesthesia during child birth because the pain isnt worth learning about. If you wanna go down rabbit holes have fun with general relativity, if you wanna make money I suggest you listen to your elders and fake it till you make it. Or go be an engineer and make 1/4 what a good tech does. Do whatever suits your cooch lil buddy. Refrigeration and hvac isn't for everyone and if you're not mechanically inclined go "my pleasure" youre way to the top of the chic-fil-a fast food ladder because moving heat around clearly aint for you. The fact that you're even sitting in a classroom having to have your hand held should bring reconsideration to your choice of career. In any event, best of luck. 🤙🏿

[@horrorhotel46290]

​@@popo_53Then why are you watching these videos?

[@popo_53]

@@horrorhotel46290 entertainment. Ya dft cnt.

[@JesusLopez-e1h]

Good Information. you should go over outdoor temperature and indoor temperature relationship to compressor ratio.

[@juangarcia3282]

YOU GUYS ARE AWESOME FOR UPLOADING THESE LECTURES

[@victordambuza8245]

Wonderful lessons. I liked the "I'm kidding" part

[@brianmcdermott1718]

Great class. Great dissustion. Great info. Thank you Bryan.

[@floyddavis2095]

Very good information, love the subject

[@trevmint5615]

Lots of info for someone just getting started

[@scottjones7279]

Another great class

[@nathanhurst5155]

Your bleeped out part is alliance compressors in trane equipment. Figure other people may wanna know 😆😆😅👍

[@joelperigo7213]

Is that when it sounds like someone dropped a bucket of rocks into the compressor? I had it happen on an American Standard

[@Raphael_NYC]

Always Excellent. Thank you. raphael nyc

[@jorgeparedes4660]

Thank you for sharing ❤

[@tommeyers974]

Hey Bryan....At 15min 30sec talk about mold issues from increased airflow ??? Seems backward, Got a video on that ?? Thanks. Tom

[@casaba6789]

When you increase blower speed your reducing your ability to dehumidify. The air has less time touching the evaporator and in turn less change in temperature is taking place. Hope this helps.

[@tommeyers974]

Got it. Thanks. Tom.

[@corruptedbrain6]

Your thoughts? so thats probably what if been seeing out there in the field. I noticed today my pressues were 144/266psig, subcool 2.4, superheat 0.7 , ambient temperature 89 F, delta t 13 degrees, and a bad capacitor rated 45mfd and cap was reading 10mfd. I do understand the difference of a low charge, low air flow , liquid restriction but what was throwing me off was when i would get 1 degree superheat and 2 degree subcool on split systems like reheem or lennox when pt chart was asking 7 or 9 subcool

[@victork3397]

I had a similar issue not too long ago. Turned out to be low charge AND plugged TXV.

[@corruptedbrain6]

@@victork3397 thanks!

[@renecuevas4128]

How you get this with a Bad Run Cap.....meaning Compressor wont run unless it has Hard Start kit

[@corruptedbrain6]

@@renecuevas4128 9 months later and after extensive research and trial and error. low superheat and low subcool... i had an overfeeding txv AIRFLOW BEFORE CHARGE Clean coils clean blower wheel correct cfms based off of compressor size correct return air correct static readings

[@danielsmart7368]

Where are you getting this 14.7 number. Is this just the atmospheric pressure at your location? I'm in north Louisiana the atmospheric pressure here today is 30. Would this be the number I use.

[@corruptedbrain6]

IF i changed the blower speed should my static pressure still be within .5 inwc?

[@shifter8207]

I understand you guys have electric aux heat for your location but I d love to see a continuation on heat pumps with a dual fuel. It’s becoming more popular in colder climates where electric heat backup is not realistic

[@renecuevas4128]

Thanks great video iinstruction. Question i got. Water Source Heat Pump Miami Area. Low side 90 Head Psi 290 compression Ratio 3.2 seems like Compressor RLA 4 Amps seems liw Amperage for a 2 ton scroll compressor....what you guys think 410 A both Coils very Clean Water Temp 80 degrees Cooling Tower very Efficient Tnks for feed back. Tnk U Brian😅

[@aliabrahimi3711]

What about compression ratios in mini split because as it gets close to set point it almost equals or close to zero delta

[@mostafayassin4103]

May ask A aquation is it compression ratio or pressure ratio because I think compression ratio is the ratio between the volume trapped at suction point to the volume trapped at compression point Vsuc. : Vcomp. i.e trapped volume when the compressor at suction phase to the trapped volume when the compressor at compression phase

[@sheldon8115]

Copland does it . I have experienced it a few times

[@chaseherigstad8576]

Bert’s got it

[@richieschmidt6225]

Everyone misses r22 systems with a piston metering device and a PSC blower motor.

[@Mouse_007]

I've been in the trade a very long time. I have looked at compression ratio as a help troubleshooting that I just do it immediately in my head without really thinking about it. ( very simple math usually ) I'm having a hard time with "add atmospheric pressure before calculating". That makes no sense. It is a closed system. The amperage, or work done doesn't change because of the pressure outside the pipes. The equipment doesn't run different, or use more or less efficient depending on pressures outside the pipes. Put the system in a closed room and pressurize the room to 100 psia, the refrigerant inside the pipes doesn't know or care, nothing changes, including the compression ratio. The compression ratio (the way I use it everyday) is a quick indicator of how hard the compressor is working. If I see anything more than 3:1 on a 410a system I know to look for an issue, below that (to a point) it's running efficient (not having to use a lot of energy), and if it's too low maybe the compressor isn't pumping at capacity or metering device stuck open. Then I turn to superheat and subcooling of coarse, because compression ratio, as I said, is just a quick indicator that lets me know if the compressor is having to work harder to overcome some other issue. I know this is all very broad and vague, but as I said, within 10 seconds of hooking up gauges I've looked at the ratio and It's just an indicator. I'm not trying to pin it down to an exact number. As others have said in the comments, there are too many outside variables in conditions in the real world to worry about details that small.

[@Captain_Kdawg]

Sweet pump

[@extracrispy7548]

i want to get into hvac but i have no experience at all

[@Ryansroga-wm6pj]

Very cool!!

[@davecoolaircon]

💪💪💪

[@patrick9316]

Really needs some color grade.

[@dalvindersinghmanku8243]

i think brain sir getting weighted gain

[@roy-andre]

I can never get over how Americans don’t just use metric.. 14. Pressure?? No dude it’s 1…. 😅

[@gregoryfrechou]

That never happens 😉

[@bwild7610]

Bosch

[@HVACRDUDE]

340psi in the summer on 410?!?! What!!! That's like a 72° day...not Arizona or vegas....ypir more like 580psi/135psi.....

[@HVACRDUDE]

Adding 14.7 and dividing...wow the trade has gotten lazy af....need my app..need my app....need my phone...need my probes....wow...I get 10x more done with analog gauges and 2 hands and some ears...

[@HVACRDUDE]

A angle grinder and 2 minutes works good too😂

[@HVACRDUDE]

Reversing Valve : since we have little field experience here....let me make this one easy too. TAKE YOUR SAWZALL AND CUT IT.....THEN CLEAN OUT SHAVINGS, AND PUT RIGHT BACK IN....TADAH.....IM HERE FOR YOU

[@HVACRDUDE]

Why would you have superheat if your not running? Oh boy.....😅😅😅😅😅😅😮😮😮😮

[@HVACRDUDE]

No heat being absorbed...so..ugh...yeah...I bet blower amps go UP with a dirty filter too😅

[@HVACRDUDE]

Ill stick where the real money is...COMMERCIAL/INDUSTRIAL REFRIGERATION.

[@kirtkincaid5662]

Not sure what real money is to you but the average pay of our senior technicians is 100k-150k. Some salesman make over 200k. That's for residential and commercial. My buddy in supermarket refrigeration also makes about 100k. Not much difference.