Impact of Airflow on Refrigerant Measurements and Performance

[@whitesheatingairappliancer7101]

Great training video. Thanks

[@renecuevas4128]

I feel like I m sitting in with all of you guys remembering the good old days when we spend a great 2 hrs..,.talking bout nothing else than AC situations n issues that I had encounter in 20 yrs in so FL fields....great class I got to say this qualifies as a 2 hr of Training School Credit. I got bout 1800 in 5 yrs of Tech Vo School and Union School.Those were the best yrs of my training experience. Being in the field all this yrs I remember the only reason I joined AC Trade.....Was because my wife say to me one day. What you are giving me is not Enough ......so I Joined night School...while doing Bldg. Maintenance during the day.Thanks God I did I never regret this great career and Decision...hope my Testimony help the Newbies. Tnks and Blessings to all.

[@garypoplin4599]

I was an electrician by trade for twelve years before becoming a computer geek. Landed a job at a university running a Novel NetWare network for its campus libraries student workstations, then moved to the Chemistry Department (knowing _nothing_ about chemistry) to work in electronics repair of research instruments. When the Chair of the Chemistry department offered to send me to refrigeration school, I said, “Not only Yeah, but . . . “ This is the best trade ever! And I’ve learned more from Brian in his videos and others like it (HVACR Videos for one and “Love the burgers” Nor-Cal Dave for another) that keeps on adding to tech school training! Like you, it was the best decision of my career. Keep learning. There’s so much to learn beyond the basics (keeping the basics at your core, of course)!

[@VoiD1x]

Brian’s got a real passion for this he is a real asset to the industry thanks for the hard work Brian keep spreading your knowledge it helps a lot Cheers

[@waterboggle36]

Hvac school is a gift from god for hvac techs all over

[@emailfilters]

51:57 - I finally got my head around this concept by thinking of the SH and SC relationship in this way: High SubCool means higher volume of liquid (stacking) in the condenser and high SuperHeat means higher volume of vapor (less room for liquid) in the evaporator.

[@paulbryant68]

me too friend! simplicity rules!

[@tunaman2200]

Just came across a situation like this and now everything makes sense especially the compressor amps. Thank you sir for all that you share and do for the hvac community especially for new techs like me.

[@emanuels.6541]

Honestly you guys are the best. Thanks for opening your shop for KZbin so we can all learn from you. Amazing guys thanks a lot. I’m learning more from you than I did from my teachers in college.

[@Stuart68505]

I repaired one rooftop unit for HVAC, and a restaurant that technicians had claimed was not repairable and condemned it. Among other faults, the major one was that someone had put on a different blower wheel with the fins facing in the wrong direction. It was secured at the hub with a square headed bolt, which could only be tightened using a wrench from the open side. So I knew it didn’t come from the factory. From my experience with American air filter blowers I remembered how they always had an allen wrench set screw. So I removed the blower wheel and installed that type of setscrew so I could put it back in in the proper position using the Allen wrench through the fins. Besides having the wrong challenge, quantity of R-22, there were other mistakes. Well monitoring the operation absent of that condenser fan started and stopped intermittently after a while. They had replaced the condenser fan motor but the new replacement motor required a ground wire. I’m not sure at this point if it was the neutral they left off, but it did not run constantly as it should. Eventually, I got the unit to work properly, and they were happy at the diner. Later on, they needed a new exhaust fan and they got a more powerful one and as result they had to buy another air conditioning unit for the rooftop.

[@marriagepartnersministry5942]

I love to see a company sponsored technician training that is about doing quailty work and theres no mention of SALES! This is so rare and refreshing. Most companies train on selling more crap to homeowners and the guys know very little technical stuff about doing the actual job real well. I traineda bunch of techs in MN about boiler basics and none of them knew the basics! The company owner got frustrated because I didnt go into selling tequniques with the techs. I told the owner none of his techs are competent to run boiler service calls and have no business selling anything to anyone, relating to boiler systems, until they at least know the basics. Needless to say his profit orientation and my quality/competency orientation were enough at odds that I no longer work there.

[@johnsepulveda2127]

Or when you ask for technical training and they instead give you an IWAVE sales training 🙃

[@arkrainflood]

not an hvac tech, but watching these videos clued me in to filters overly restricting airflow. i had been using merv 13 filters as they were claimed to capture germs, smoke, very small particles. however they were way too restrictive. i tried exhaling air through it, too difficult. so switched to merv 4, and rely on a stand alone air cleaner unit to get the really small stuff.

[@trevordollinger6569]

Hey man, glad you noticed this, most people don't! Although i'd recommend switching to a Merv 7 or 8 next time your filter change comes around. I find that to be a happy medium that most air handlers can handle gusting thru. Your Merv 4 is certainly way better than the Merv 13 that was present before tho since you probably get crazy air change right now.

[@RonNL1030]

Training classes for your techs it’s definitely a good investment. The better trained they are the more thorough they’ll be and will take them less time to troubleshoot an issue and have it fixed. The company will eventually make more money because of its good reputation. Your employees will be more valuable and better paid. So everybody’s happy.

[@kevinconte9343]

Arron has a valid point on bulb , came across a Ruud with it just chillin outside the cabinet homeowner said systems been rocking fine for years 🤙

[@brunonikodemski2420]

Way better than most AC-videos. Covers relevant issues for most air-flow problems, among many obscure others. We've seen at least a dozen of these. We had obscure problem where fan did not work in cold, and eventually discovered an intermittent electrical connection to the evap motor. Very hard to diagnose.

[@KevinMartin-dp8qf]

I enjoy this, I am on the go all the time and I have no wiggle room to go to class, wathiching this has made me a more efficient tech,

[@Icytits]

That dude in the front just eating pizza kills me everytime

[@DA-PICKLES-VR]

That’s not just any dude

[@matthewsteross]

That's Jesse, Bert life! He's basically a celebrity.

[@kosworkshop]

Awesome, can’t ever beat the video content

[@jakegriffin9776]

That guy is the real deal that’s why he’s allowed to eat pizza how he pleases

[@gordonborsboom7460]

Probably the first time he has sat down all day. Too busy until now to eat. Bryan’s face tells you it’s a hot, humid day.

[@renecuevas4128]

Min 50.....sensing bulb.Found loose and hanging out sometimes to allow txv overfeeding the Evap Coil you are 100 percent correct. Txv bulb also was missdiagnose

[@frankmashione139]

Always enjoy your videos thanks for opening up your company to us.

[@snickerdoodle7188]

I love these informal classes.

[@samuelg3586]

Awesome training videos, would love to attend one in person.

[@AlphaMale_1]

Great class and expert instructor.

[@Stuart68505]

I came across a rooftop packaged air conditioner where the blades were facing the wrong direction. It could only be put in facing one direction with the square head nut for securing it to the motor shaft. I changed it to an allen wrench type set screw & used an allen wrench that could reach through the blades to reverse the blower wheel’s direction of discharge.

[@KyleRicciardi]

@hvac school the new airflow feature can me modified by going to settings and turning on advanced targets. It was switched to allow for more airflow prediction flexibility. If you set it to 350 400 or 450 and it's too far out of range it locks the airflow gauge

[@cameronprice931]

Direction of motor , strength of the airflow being able to pull the filter back into the return grille , strength of air coming out vents , amp draw blower motor , bearings out in motor can cause noise or wheel broken , evaporator coil cleanliness , all types of possibilities and I was always told KISS “keep it simple stupid” and check all the basics first and usually can figure the issue out while checking basics from context clues

[@stevewilams867]

I am watching this for makeup hours at work for professional development training. I’ve watched a bunch. Enjoy each one. That kid in the back looks like he is bored out his mind tho. Just sayin. He”s probably thinking geez dad. Thanks for the father and son time.great video btw.

[@MrRamHVACCOACH]

Great information 👍 HVAC-R & VRV VRF Coach from India

[@michaelpersonale7396]

Such a great video. Much more than just air flow in this. Must watch for any tech out there!

[@ddcws1]

Hey Brian! Could you do a video on zone systems and airflow. Also setting the bypass damper static pressure. I feel a lot of systems that are zoned fail prematurely due to airflow issues. Thanks!

[@iliyasmohammedadam6857]

Hi I just got ducted heat pump installed in my lounge ground level with 4 diffuser 200 and got 2 350 return on upper level ceiling so now heating 80 sq Mt open plan lounge take 2 hours. Should I take return from ground level to make faster heating

[@grindstone5368]

Really appreciate your videos very helpful. I do think you got volume/mass flipped in your explanation, but great way to convey the idea.

[@Gary-ts6dh]

19:40 - I worked on jobs with power supplied from many companies throughout Florida. I have yet to come across a true sine wave. These waves are very jagged, making the peaks look more like the point of a dagger with chunks of material removed in a bad sharpening session: not the rounded peak of a true sign wave.

[@rando_webb8704]

Damn, that in one young tech in the back row.

[@jordeneden9408]

I've been waiting on you to make this video. It was helpful to understand how airflow affects superheat and suction line temperature. I was hoping that you would also show conditions that would be affected as you blocked condenser coil as well

[@robertccollins2495]

Clean the coils inside of it how do you clean the coils inside of the Furnace

[@fla8502]

Not me yelling answers at the tv lol

[@onlyulee866]

Do you require to install if the unit is in closet with the stand with no duct on the return

[@HVACTeach]

“See how fast the blowy blows”. Fckn love it 😂

[@786hidalgo]

I am very impressed with how often you teach your student 🧑‍🎓 I am very excited to start class soon. I know you're in Orlando, do you have a school nearby in port saint, Lucie?

[@brunonikodemski2420]

Added comment. A PWM system is NOT necessarily a VFD drive. We used to design these for other applications. For AC-systems, where the motor is typically a simple 60Hz-motor-design, the PWM always has to be coordinated with variable frequency (thereby requiring a variable frequency), otherwise the motor will burn-up. For typical induction motors, there is a V/F constant which has to be maintained to maintain the magnetic-flux at an optimum level, or optimum efficiency. As such, the SPEED of the motor will always be determined by the FREQUENCY of the drive, and the PWM will change the VOLTAGE to the motor, as required to maintain the motor at correct flux. Multi-meters which can measure the frequency of the AC motor, will show this. At low speeds, the motor voltage MUST be lower than normal. Do not be deceived by this, if you are reading the voltages at a very low motor speed. At high speeds, some drives can actually deliver much-higher voltages to the motor, than normal. Also deceptive. Usually this variablilty range is only about 3-to-1, but in some systems maybe as high as 6-to-1.

[@MrGarcon98]

i can say we did not go over this much in our class and in our time all those fancy gauges where not available either ,,,now i am sleepy ,,,,old man needs a nap ,,,,,great class though ,,,,,fun to watch

[@JP-sd2cw]

Can we get the link for the trueflow tool you mentioned?

[@dross3674]

So if you’re starting a new system up and you wanted to set the fan speed before charging it, how would you go about doing that. Do you take tesp measurements and set it based on the blower chart or can you just rely on the Mq estimates?

[@DWAYNE2ism]

Hey great series

[@hvacguy9319]

Really good videos about hvac

[@Richards_Maintenance_Service]

HAHA that front row cracks me up one guy just rolled out of bed the other is ready to head to the beach.

[@timstanford3443]

Thank you for the great content!

[@CollinLutz-p9e]

I already have the duct work. I just need a new unit. We tried charging the one I have, and it didn't last long. It runs, but it just produced warm air. Also, our unit is kind of small for the age of this house and the sq ft. About 1985 and 1500 sq ft. single rancher with finished basement. I'm thinking 2 stage would be nice, but I'm not sure it will be worth it

[@realestateservicessaleshea99]

Appreciate the tutorial! 🥃🥃🍺🍺🍺🍇🏌🏻‍♀️ Stay safe. Retired (werk'n)keyboard super tech. wear your safety glasses.

[@w5cdt]

Great video

[@kaythompson7506]

Can’t you check airflow based on airflow performance manual, with a static pressure check, amp draw and checking set speed.

[@jasonjohnsonHVAC]

Bert is a hungry man. Lol and his hair looks like he came from a FL hurricane

[@markkinney1310]

he was hit by 277 volts , just kidding

[@jamalymall]

Your in-person training is only for Kalos associates?

[@L8NiteCoffeeSips]

If I walked in class with crocks on, my instructor would’ve roasted me lol

[@dylanwood7810]

I don't think this was mentioned, but if you are working on a communicating indoor system, and communicating UI, but non communicating outdoor system ( infinity or ion systems) making sure you have the correct tonnage programmed into the UI can cause airflow issues

[@jlxm4886]

That is my George Bush voice and it wasn’t very good.. let’s pretend that didn’t happen… too late it’s on KZbin 😂 great video! Learned a lot.

[@wallyjazzy]

Excellent

[@jacobangel5114]

Hi I am learning a lot from your classes of those 20+ video's. I would like to have a sequence from 1 to 20 in term or easy to hard, if it comes a text book ,so of speak. And what text book do you recommend? Thanks in advance

[@FaisalShaikh-hu1yl]

What if we increase condensing fan speed??

[@donjohnson5172]

Hey Brian, around 13:40 you talk about a collapsed duct due to a “splice in the wrong direction”. What do you mean by this? I have some sinking feeling that I’ve been splicing duct wrong. Spiral over collar, tape, zip. Wrap over collar, tape zip. Am I missing something?

[@ronniebuchanan6575]

No you aren't missing anything. Have you ever seen anyone splice flex without a pipe between them? Slide the spiral inside the other? This can be done but you can't slide the spiral from the feed over top of the spiral its feeding. Because the air will get between the two pieces collapse the duct its trying to feed in to. The feed side needs to slide into the inside where no airflow restrictions can occur.

[@1martinontherocks]

i wish one of my grand kids was sitting there just like that kid.

[@AJservicetechAZ]

Love these vids

[@renecuevas4128]

Head Press in this Inside interior Install is low because Cond Unit is working under probably Conditioned Space Temperatures,,,,,keep that in mind that if out temp is 95 degrees versus 75 in temp the Head press. Would be considerable much lower.

[@renecuevas4128]

Tnks great video

[@mehrespand_ir]

Nice

[@kalulugrace4810]

What could be the real problem if the refer defrosts every after some time but inside doesn't cool the staffs

[@AngryMrFixit]

there's like a 6-year-old in the back of the class. hell yeah, kid, rock on

[@Barracuda48082]

Secuencial pulsed dc .1, 2, 3, repeat= cw rotation, reverse 1, 3 pin reverses rotation on ecm motor?

[@Infowarrior-45]

I heard "very shitty pets" and was like what? Then I realized he said "very sheddy pets" LOL!

[@donjohnson5172]

Me too lol. But all of the service guys know that there are also some truly shitty pets as well. Love the homeowners who will let the dog piss and shit right next to the condenser and then expect you to kneel right down in it.

[@WhiteWakedNProud]

Awesome video! This content shouof be treated like reading philosophy, one bite at a time, and breaks to allow full digestion. For young'ens at least "It is my ambition to say in ten sentences what others say in a whole book.” Friedrich Nietzsche

[@efco24]

Maybe I missed it, and you probably don't have many in Florida, but the secondary heat exchanger on a HE furnace can often be a source of restriction.

[@bigbite9804]

Please make some videos VRF UNIT RELATED

[@michael.imv.8989]

How can I get into a class like this one

[@Gatsu1995]

Go work for those guys

[@peppersaltman1805]

I woke up today wondering what exactly a dirty filter or a broken fan does.

[@loser-nobody]

unrelated to HVAC: wtf did the audio editor do to cause the strange reverb?? It's not easy to filter tons of mechanical noises and reverb but those ominous audio artifacts created after every cut are hilarious!

[@marriagepartnersministry5942]

My observation is that a company needs to pay a trainer and there guys for their time to tech train at least 2 hours a week or the other option is to hire union service fitters who already got all that extra training and just pay the union wages happily because you dont need to do the weekly tech training.

[@bigbrother3662]

Holy shit, spicoli made it to hvac school hahahha

[@Badtxv]

Wow Eric's head is literally covering me the entire video lmaoooo

[@dakotab825]

That one guy totally just shows up fir the pizza lol

[@jamesfields4149]

Check the capacitor on the blower lol

[@kalulugrace4810]

Acomercial refer container is not cooling but defrosts every after some time

[@lunytoo]

This person making me hungry watching this video.

[@Clasped003]

what would be considered low amp draw for a compressor with low airflow? like 75% of rla? or less?

[@BradXP]

I was always told 60% or less

[@nathanbennett9025]

High static pressure can make the compressor go out to

[@timbrown9305]

Ok boys, next time suits and ties in the audience. I can't charge enough if your not going to clean up!

[@keepthinking2666]

On perforated ceiling tiles they suck so bad because yes it's a greater area to have air or open plenum return but especially in food courts and malls all that grease from pizza ovens and everything else goes straight up into them and they catch every piece of dirt and then get blocked and in my case you have a operations manager in general manager that's stupid and what do they do they hire in painters to paint the ceiling and they paint right over all of the perforated tiles so therefore there's zero return now

[@jordanhenshaw]

So Marv is trying to break in by posing as an HVAC guy this time?

[@Anton-du-Fleur]

25.30 call me sad but I do this. Sorts out the info with Fieldpiece sta2

[@keepthinking2666]

Oh also forgot on a p sc fan motor someone set the speed to low

[@tomorrowsyoutube7138]

Look like the crew just got done fighting thanos

[@Edison15861]

What about when they add more vents in the basement after they decided to finish basement , is this correct to do?

[@caru3257]

if the system is oversized, yes. Most ductwork is undersized so in reality, no.

[@adamcraig1568]

Dude in the front eating pizza looks high lol

[@mikev.1034]

👍👍

[@nicholusedwards4328]

Like your teaching very much? When you going to talk about mini split

[@Dark_Knight_USA]

Greetings: 26:00- Airflow gauge...'Survey flag'.

[@Anton-du-Fleur]

16.00. I when to a no cool and found this, so it can happen

[@shifter8207]

If Bert keeps eating that pizza he s going to get some wet gas in his pants

[@CCCC-tq8yo]

Who here likes pizza

[@Spiffy35]

All kinds

[@Hellobdhx]

Who here like pussay

[@Dark_Knight_USA]

Greetings: Soft crust and lotzzz of fungus.

[@justinperry68]

These employees totally look like a SNL skit

[@caru3257]

I had a 3 1/2 ton unit with six supplies vents. It was going on defrost every 30 minutes.

[@keepthinking2666]

Low air flow you got a couple times I've come across it where you got dead animals get pulled into the squirrel cage and literally becomes a squirrel cage of death you also get chunks of trash and bags that get pulled down and sucked up and it's on the inside of the wheel you got low air pressure build up where it starts to freeze which then old dirt sticks to it which makes it freeze more there's so many things over 25 years I couldn't even list them on two pieces of paper what I've seen hell I do commercial 200 ton units and my duct works at one time built up static because the turn in veins were under such great pressure because the idiots installed the units incorrectly that it broke off a turn of veins and they went down the ductworking got lodged and we're talking ductwork where you walk down it and then you have to go down onto your knees until you get down to your belly pulling out of 5 ft x 3 ft section of heavy gauge steel is annoying especially for those self-tap screws

[@damianhegwood517]

God is spelled with a capital G.. but thank you HVAC School

[@Tanis630]

Guy up front looks like Lucifer from Supernatural