ITS JUST AN AC HOW HARD COULD IT BE......
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- čas přidán 9. 07. 2024
- This one gave me a run for my money , but I tried my best to keep my cool even though it was well over a hundred outside....
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Oh boy! Bad compressors, dirty condensing unit, condemned unit pieces, ground faults, leaks, and problem after problem altogether; its got it all! Its absolute dynamite!
Buh! Spoiler alert!
Yes
Oo
disaster smorgasbord 🤣
@@mountainbreaker2 watch the video before you go to comments lol
Appreciate how you walk us through your troubleshooting workflow. I’m a 60 year old facility maintenance mechanic and moving into our HVAC department. Passed my EPA 608 cert.
Never stop learning new skillsets!
Compressors don't die, they're murdered
Usually
Absolutely
Most compressors fail because of system problems. Those scroll and piston ones from Copeland and Tecumseh are tough some others too
Good job by the way
Mine just died, but it's also 30 years old in AZ. 😂
@Jonathan Fair
That’s not bad pretty good life for an A/C that gets used a lot. You probably maintained it well.
I've seen quite a few compressors make it over 30 years but I've also seen them die in under 5 years
I loved this one, It’s got it all! Hot kitchen 🔥, very angry and noisy first stage compressor 😡💥, plugged up dryer, dirty condenser and filters all plugged up, dead second stage, 3rd stage not looking good and more and you still got it up and running 👍 I especially liked the part where the compressor started to become quieter.
i'm a HVAC professional, and i love watching your videos in my lazy night time. You do good work! not many pro's will be honest the way you are.
In our line of work i have met many techs who replace things that shouldn't be replaced for the sake of getting a good commision, but i love seeing people who know what they are doing.
I have seen some pretty nasty jobs that were jerry rigged, and it just warmed my heart to know other people like me are providing a great service. Keep at it!
If it was easy, they'd be doing it themselves lol
This must have been so painful to tshoot and to change the dryer multiple times, but nice work as always 💪
I’ve been doing HVAC/R for 20 years and your videos still make me a better tech. Thank you
Have a great idea for a new hvac/R video shirt. Logo is a picture of you diving into a Roof top package unit like a swimming pool with a life ring saying Big Picture diagnosis
On the Applied/Engineered side, as complex as Absorption is - Single-Effect, Dual-Effect, Generator, Condenser, Evaporator, Absorber, Vacuum Pump, Concentrated Solution, Diluted Solution, HX’s, Eductor, Purge, etc. can get - all HVAC is a science. Centrifugals, Absorbers, Screws, LC HVAC, Resi HVAC, I love it all. I’ll throw ComRef in there too, just not LC Refrig tho. 😂
i really love when you do these part autopsies. it's one thing to understand a part is bad, it's another to understand why.
Damn. What a headache of a call. Can't say ive ever seen a drier clog up that fast. Good call on the large drier and ball valves. I know you got to the point of saying....enough is enough, im going for it. Another great video Chris
You know I have been in hvac for 19 years. But let me tell you, you can always learn. I appreciate you, Chris, for making these videos. Also, love the hat. I know your wife handles the merch so give her a thank you, please. Appreciate you and keep up the awesome work!
Thanks so much for the support James!
Hey Chris! Ive been watching you before I started school and here I am finished and been working as a service tech and installer! I even got my own truck now! Thanks for the motivation!
Thanks for watching bud!!
What in the name of all that's right and holy did 21 folks give this a thumbs down??? I find Chris's videos a model for critical thinking, which we as a nation need more of. Thanks for posting.
I've had this happen. Change driers several times. It's burnt up oil
Note to self. Parallel 4 driers just to ensure it'll live 😹
Is it weird that this man is the reason why I decided to get my hands on a basic HVAC system to tinker with? I enjoy poking around at it and learning about what I'm looking at realtime watching him work
Can you read my mind, was having a bad day and this picked me, thanks for sharing your world with us
as uncle nor cal would say: MULTIPLE OFFENDER DELUXE!
I work in in Industrial Maintenance - The last little bit of your video hit home. I can't tell ya how often when PMs come out, there are a select group of people who will pencil whip these PMs because they assume it'll be good. Eventually, this is the type of shit that will happen to this facility, same type of thing happened to the last facility I worked for. Enjoyed the video! I love how other people work through problems, I think it's so incredibly interesting seeing different ways to troubleshoot.
Chris please take me on as an apprentice I do residential HVAC now and love the work and your videos are so interesting to me I would love to learn the commercial side and take the next step in my career
An old timer refrigeration man taught me that oil goes through the expansion device much slower than the refrigerant. If a lot of oil is in the evaporator (like after a leak or restriction) You need to wait and watch.
R22 makes wax...that's why they don't use it on freezers.
I’ve been using your videos to help train my new guy! Thanks Chris.
I know nothing about HVACR but still watch all of your videos just for the troubleshooting. Fixing anything is still fun! ( I have done some hvac repair to keep it going :) )
Awesome video! As a maintenance tech I'm always checking filters and on schedule with my PM's. Good to see what happens if I don't do my job right. Very informative video
hope your customer get through the season and great that you got it working for them
Currently taking hvac and before that i NEVER heard anyone say how hard can it be.🤣 because they prob know its hard. My instructor always says: if it was easy everyone would be doing it.
It adds another level of complexity to controls, but it's nice to have a static air pressure differential sensor between the inside and outside of the building and have that control exhaust fans, or makeup air accordingly. I set up controls on a very large building that had air handlers that ran in economizer modes with no fans on the returns which would build a lot of pressure in the building when in economizer mode. The pressure sensor automatically staged exhaust air fans to maintain the proper pressure range.
From my experience it is clear that this unit is drawing kitchen exhaust into the condensers and air filters. I had one project many rears ago where I was called in to assess as the service contractor could not improved performance. I test the condenser coil, although it had been cleaned, when I put a meter over it there was high air flow in the centre but quickly decrease to no flow as I more away from coil centre. The coil had to be removed and cleaned bit long term we had a new condensing unit fitted away from exhaust.
I’ll take ac calls over freezer calls ALL DAY, EVERYDAY. Worked inside of a freezer for 9 hours today (for free) and I think refrigeration sucks.
Get a contact stethoscope. You would be amazed at how much better you can get at diagnosis. Just start listening. Motors compressors even a listen to the housing. Over time you will begin to identify certain noises with certain problems. I do this with heavy equipment cars lawn equipment etc.
I learned this when I was a printing press mechanic.
This is especially useful in loud environments where distinguishing sounds is harder.
Thats an ole car mechanic trick... it works great
@@FlyEaglesFly19111 You know it. The old "screwdriver tip to the suspect part's housing, and then handle of that screwdriver to your ear" works great. Or you can get a purpose-built mechanic's stethoscope, which will do the same thing and won't get you any funny looks from the layperson.
Every time a new video of yours appear I feel like its my happiest day of my life!!!
Crazy that that new drier clogged literally in front of your eyes after install. Nice idea on the ball valves. With some customers.... maybe you should put them on whenever you change a drier that doesn't have them. The customers that aren't too big on PM. How awesome would that be to just have to vacuum down 3 feet of pipe every time you change one. Great video!!
Winston.. in a perfect world it would be a great thing. Actually if engineers would do it from factory.
@@FlyEaglesFly19111 I agree. All those large package units should have ball valves on the condenser, the evaporator, the drier, and the compressor as well. If they did, then we would be able to replace components without having to recover or vacuum the entire system, only parts of it. That way you only end up recovering and vacuuming the entire system if it's something that needs to be done, or something you wish to do.
@@FlyEaglesFly19111 they do… on chillers and industrial equiptment. All the equiptment at the prison here I can change the filter in no time
With the build quality going to crap like it is do you really want more spots in the system for potential leaks? Solder joints are lacking in the factory nowadays.
@@pende97 I think it’s more of a material issue than anything. The base materials are getting so cheap they don’t last. I don’t really have issues with brazed factory joints
I love that you cut those driers open. Very cool to see the stuff you picked up from the system. That’s crazy you plugged up that second one so fast.
It's interesting that they say 225° Max. That's the same spec in the automotive transmission world. 260° is almost immediate death to a rebuilt transmission.
As an inspector I can say that when we see something wrong we know that we know enough to call people like you.
I am kind of amused there's not an automated cleaning system to at least rinse theses units off every few weeks. Then again i guess that woudl just be one more thing to not mantain.
That costs money, restaurants don’t wanna spend it.
For the top gear fans in response to the title text. Hammond: DONT SAY THAT!!!
LOVE this video -- I love seeing difficult, real issues in the field and the tech thinking process you demonstrated is just fantastic. More like this, please!
I could hear that compressor as soon as you opened it up. That’s my style too if I find a compressor bad I tape that plug.
I really enjoy the diagnostic process. It’s like listening to House.
Poor field piece evac machine, hope it had a filter on it….
On Unitary equipment, I’ve done that same set-up you did, I’ve done double FD bypass, I’ve moved the FD closer to the TXV, I’ve converted the TXV to Chaflett, etc. Why sweat in a 3rd replacement TXV? When you can isolate, verify pumpdown hold, change the Flare FD, change the converted Chaflett TXV, etc. Some “Techs” don’t dig as deep as we do. Some small systems can be highly contaminated.
I once gauged up to a 3TR Wall-Mount at ROW site. I started losing pressure, I looked for leaks nothing on the system. I sprayed my hoses - they had pinholes everywhere. Caused by the high acid in the system, any longer the terminals would’ve blown.
Sometimes you just gotta do what you gotta do. Customers around my area are struggling to come up with money to replace so you do your best to get it running. I’ve Been doing commercial HVAC for 14 years and it seems like a couple times a month I run into something new. Moral of the story for the young guys just getting into this business, if you think you know & have seen it all, think again. Lol
Great run through! Thoroughly evaluated and methodical! Keep the sharing going!
You guys are legends.....I'm from India and we work only on small acs like 1 ton 1.5 ton and 2 tons and we get mad while fixing it....I don't know how you people survive the wirings....In India the power is very fluctuative and mostly their circuit board gets damaged so......I mostly recommend customer to run the ac directly with a 2 core MCB and it really works just fine......
Great video as usual, It's great to see professional and proper servicing being done to these very expensive systems. Keep up the good work!
You know, I used to think this was some sort of difficult thing. I watched your videos when I was still a marine electrician. Recently, I did a stint with an AC place that's automotive, and decided to give your videos a watch again, and now I'm seeing there ain't much of a huge difference in practice. It's still just observation, charges, head pressures, and discovering your client can't do any sort of basic maintenance at all and makes you wonder if they even remember to wash their hands with how damn dirty the condenser is! There's obvious differences in the method, but the practice and what's what seems to be similar, and it makes me want to try to get my cert for this. Thanks for the entertaining videos, my guy!
Great video, as always! As an EE in the auto industry I was thinking I would have cut open the first dryer to check for metal compressor fragments. Not that it would have really helped with the oil contamination, but might be something to consider in the future.
Those Ball valves on the driers was genius.
6” 225 👍🏽 great work
I appreciate that you cut open filters. Now I have reference how bad filter looks like. Never expected soot to be present in it.
Man your dedication to this repair is commendable 👍🏽👍🏽
I really appreciate your interesting videos. I'm not in the HVAC industry, but watching these videos by yourself and others has caused me to pay much more attention to routine maintenance, particularly condenser cleaning, on my home central air unit than I have in the past. Thanks.
Loved the explanation of driers being clogged due to oil burn off and high head pressure. Thank you for the education.
Wow, the speed at which that drier clogged is astounding! I dont think I've ever seen one clog that fast! Even at the concrete building component company that we service (that refuses to allow us to clean condensers and change filters). They only allow us to repair the completely broken units enough to get them on.
Dirty Condensers should be your next band name.
Great content, thanks Chris !
Great video 👍 yeah times have been tough. I just replaced mine. I was tired of adding expensive parts & gas. I was 2 years deferred
This was a really informative video. Great work
A few tips from 30 years in the biz. I ALWAYS cut open liquid dryers before going any further. I want to see what plugged it. I've never seen one with chunks of oil char that big but even with a little char, I do a flush. Since that one has to run a long time, I'd probably flush the whole system. And replace the oil. The way I do that is to drill a hole in the bottom of the compressor so that a 3/8" rivet (no pop-rivet but the kind that is heated red hot and hammered) is a slight interference fit.
I have a setup I made for flushing compressors. It's a reservoir of flushing solvent, a pump and a pair of copper tubes. One is a fairly large capillary tube. The other is a 1/4" return tube. I stick this through the hole. The capillary tube sprays a high pressure jet that will dislodge even stubborn crud and the 1/4 line sucks it back out.
When I have as much solvent out as possible, I plug the hole with a silicone rubber stopper and draw a vacuum until all the solvent has evaporated. When dry, hammer in the rivet, inert the system and silver braze the rivet in place. Add new oil and you're ready to go.
Before I hammer in the rivet, I take a look around inside with my boroscope to see how things look. Make sure no metal chips got inside (I drill with an assistant holding a shop vac hose against the drill bit and nitrogen blowing out.). Also to inspect the motor windings. If they're not bright and shiny, I'd recommend to the customer a compressor change-out. As you know, a compressor burn-out is a very big mess to clean up.
Really enjoying your vids. I'm retired now but I still do an occasional job just because I love the craft so much.
Your a great technician! Thanks.
Excellent work my friend. 😎
you noted that these units are being used for make up air. Most manuf. that I have talked to stress that these RT AC gas pack units are NOT make up air units and to use them in that way will void the factory warranty. They are not designed for this purpose and having to try to temper all that outside air will definitely kill compressors and the other components and really overstress the unit.
“Was working fine until recently!” Meanwhile one compressor is condemned…
well explained step by step sir, Thanks...
the superheat and subcool look a bit high for an air conditioning unit, which tells me the balance between the condensor and evaporator isn't matched well (restriction around metering device). but i'm used to more residential type heat pumps.
What a great video! Thanks for sharing. That was a very interesting call. I had a similar issue this summer and changed the filter twice but didn’t resolve the issue. My thoughts were a plugged evaporator or expansion lines. Did not touch it again because the customer is going to change the R22 unit out.
I watched 2× the oil leak wasn't addressed I guess it was on the second stage?
Nice video!!
🍺🍺🍺🥃🥃🍇🎳
Stay safe.
Retired (werk'n)keyboard super tech. Wear your safety glasses.
Great display of skill. The lack of preventive maintenance causes the electric bill to go up as well as being destructive to the equipment. Why is this customer planning new replacements without you knowing? No loyalty? Learning the electronic controller codes takes special education time. These controllers are always changing from year to year and manufacturer to manufacturer. This "education time" can not be billed directly to a customer so it is recovered in the hourly labor charge. Customers need to understand this is part of WHY labor rates are so high. Also, the amount of tools required to work on these rooftop AC units is enormous. And it's heavy to carry all that up to the roof. The technician's wages in HVACR should be the highest of all the trades but it's not. Is it any wonder why we can't get new techs into the trade? It's hot, dirty, strenuous, and requires more ongoing training than any other trade.
TolsleOfView.. great synopsis you have there. The trade has changed a ton in thw past 5yrs substantially. More in the HVAC side than the R.. yes the Refrigeration side is becoming more electronic. But yes a constant training for HVACR. Than other trades is spot on!
@@FlyEaglesFly19111 When I started in this trade, R-22 was 69 cents a pound & individual relays created all the control logic.
In the commercial restaurant chain world its pretty common for the restaurant corporate head of facilities deal with ordering the roof top unit directly from the manufacturer with a national account representative. So he will still probably submit a quote and be in charge of installing it but considering lennox is currently quoting a 14 week lead time on new units they probably arent in a hurry make arrangements to get a install quote. Thats why are are planning replacements without him knowing. Its pretty common for them where I work for the facilities guy to visit the store and order new units based on age alone and all the sudden we get a request for a quote and asked to approve roof curb layout.
When I started in this trade there were three basic refrigerants
R12 R23 R502
And maybe some Careen 7 once in a while
You do know what that is dont you
R22
When R410 was first offered in kitchen freezers I had no idea the oil could turn to black powder. Kitchen management bought a new American brand 40cf freezer that had a 1-year warranty. It failed @ 11 months. The manuf wanted their guy to repair it, so he installed a new compressor. 4 months later it was tripping the breaker and no warranty. No dryer, no screen on the expansion valve just a clogged liquid line. The black graphite-looking powder that came out was mind-blowing to me. Called around and learned that this was a popular new complaint and the cause was very high condensing temperatures. My Freezer was operating in a 75-degree kitchen so what's up? After installing an oversize dryer & a bigger fan it was better but still too high for this location. Installed a new factory condenser and a big flair dryer. Better but still high. A new compressor was installed 4 months later and again 6 months later. Each time we had the system open we cleaned the dust from the liquid line and replaced the dryer! Turns out the refrigeration condenser was just too small. Sure glad it was indoors. I was the facilities engineer and service costs came out of my budget. I told the kitchen management that I would not waste my budget to keep this junk working. They let me trash it and I got a new Hoshizaki. Some equipment manufacturers hire engineers that will cut corners to meet a cosmetic dimensional spec.
youre a badass tech dude fr. i miss hvac but i dont miss the 50 min trip just to get to work
Wow, that black powder in the filter driers was really something! Why don't all hermetic compressors have a sight glass on the crankcase so one can see the oil level (and whether it's black from suspended contaminants like that)?
I think, all compressor types and sizes should have sight glass to check oil level. Just like motorcycle engine
Great video! Thanks.
Thanks for the extra knowledge... More power...
I'm preeeeeeeetty sure I know which restaurant chain that is. I was fairly certain when you said all the RTUs are makeup air. I'm pretty much 100% positive after I saw a certain sticker on a certain unit. Half my summer has been washing their ridiculously impacted condensers because they literally do zero maintenance haha.
You need a molecular transformator for pulling charge. I pulled 20 pounds of 410a today in like 15 minutes. Granted it was only 80 today (it's been in the 90s and humid for weeks), but it really makes little difference if the bottle is in the shade and the subcooler is in water.
Get all four condenser fans RUNNING
I always wondered what those dryers were, I always thought they were expansion tanks or something
a few times when I have seen problems like this, It's been from a lightning strike
Ruud when an rtu fails
Epic when I get satisfaction from watching these videos
Phenomenal video thank you
Before watching the video, seeing the video title and having watched your videos for over a year: "Very hard."
Back in 1982 when I first went into HVAC training I said to my then wife " what's in a fridge, it stands in the corner and gets cold..."
Still haven't Sussed it tbf tbh..
If I build a restaurant, I will build a roof over my roof and the end walls will have filters in them and the sun will not be directly on any AC unit. I will have big VFD temp-controlled fans in the end wall to pull the heat out. I will have a shed with cold and hot water, compressed air, and a pressure washer. I will have a winch that will allow the tech to pull his equipment and compressors up to the roof with an electric winch. I think my idea would pay for itself very quickly in greater efficiency of all my units, and faster repairs.
Techs would LOVE that. However, I'd advise against the VFD temp-controlled fans. VFD's are failure prone and should only be used when you're scratching for any little bit of extra efficiency you can find. I'm not saying you can't have temp controlled fans, but they should be conventional 3-phase units operated by motor starter type contactors, not VFD units.
Proper prior planning prevents piss poor performance (7 P’s). Do maintenance, pay now or pay layer. Good videos brother , keep up the great 👍 work
You are a better engineer than the engenders that designed that packaged unit…lol. You have a good technical imagination
I highly admire your skill and work ethics..
Thanks bud
Great video true refrigeration and air conditioning systems mechanic
You're a real asset to the trade my man.
This supply shortage has sucked. Not being able to change like for like on RTUs have been horrible. It sucks putting adapter curbs in.
Love the vids man.
Very interesting vid ... Tnx for sharing ...
Once again you are trying iceskate up the mountain. Glad they're replacing that trainwreck. Still 3 months before the new unit can even be delivered--- hope that splint lasts through the hot season.
Thanks youtube i dont know anything about AC nor do i even own an ac but i watched and it was interesting.
Thanks Chris
Great video
Nice vid Cris.
interesting ,,i never worked on such a system , good vid thank you , funny today is in the 100 105 feel like temp ,,thats florida in july
Reminds me of work on the boat when I was in the navy
Lack of maintenance causes more serious issues than I could’ve imagined. To the point of Cooking the oil is some bad sh*t. I want one of them hats
I will discuss this on my livestream this evening 10/11/21 @ 5:PM (pacific) come over and check it out czcams.com/video/Mf8BPexYVhA/video.html