Another Day in the Life of an HVAC Tech: Episode 11
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- Опубліковано 28 лис 2015
- We trace out some spaghetti wiring and show a Delta high leg 3 phase system en.wikipedia.org/wiki/High-le...
We also replace some blower bearings on a Lennox unit. - Наука та технологія
Excellent work Greg! I really love watching a pro do his work. Just a tip for you, that bushing you had to remove from the pulley, if you look at it you'll see a second set of threaded holes, take the bolts from the holes to tighten/install the bushing and move them into the threaded holes. Then tighten them against the pulley to extract the bushing. If I'm not mistaken, the bushing is a Q/D bushing and they are very easy to remove using my suggestion. Thanks for the vid!
I really enjoy watching your videos like these. You have a great ability and talent for these types of repairs. Keep up the good work!
Thank You! You taught me something today, how to find the center of a shaft.
I don't know anything about what you're talking about. Came across this video randomly after another I was watching ended. All I want to say is I have crazy respect for your skill set. I'm a white collar finance desk job guy, and after watching this I realized I ain't shit! Some serious knowledge here that I'm sure a lot of people overlook. Keep doing what you doing man! Wish I had your knowledge.
just thank you for your sharing your experience, it help us to see that work is a BE for all of us who are in this business 😓✅
It must have been a pain to try to film all your work on these units, but I am glad you did it. Brought back a lot of memories of when I was a maintenance electrician before retirement. Thanks Greg!
The bearing job was brutal. The jake-leg wiring fix was brilliant. BTW, I have watched your soft solder vs. brazing video about 5 times. Thanks.
+Steve Allen
Thanks!
thanks for your videos man. hard to find helpful videos as yours. I really like that you take us through the troubleshooting and fixing problem process not only the results. not every body does that thanks very helpful please keep them coming
Really enjoying these videos. I can't wait to get out into the field and start doing this stuff. Thanks for making these. You're really making everything we're learning in class make more sense. Looking forward to watching more.
Nice job! Always a pain tracing back over someone else's work. Gives you some insight into the mind of the person that was there before you. If I could give you two thumbs up, I would! Looking forward to the next. Thanks for sharing
+Darryl Landry
Thanks!
Thank you for posting these from time to time- very interesting stuff.
another quality rooftop production.. Thanks man... 🔧
One time when I was on strike I had a job as a helper for an AC tech. I carried his bottles in and held his screwdriver and his pliers. Then after he did all the work I carried his bottles back to the truck. I never felt so useless in my life. After a while I quit and got a job driving a taxi. That was even worse for other reasons. Thanks for sharing.
+cerberus
The kid is a senior in highschool that's with me every other week on co-op from school. He was installing a defrost time clock for most of the time I was on the ground.
Nice work. Those bearings are always a bear. I was surprised when the first side fell right off.
+Rob HVAC
Me too. Getting knocked around in the bearing housing probably loosened it up.
as a retired Xerox rep, it's always fun to watch someone playing with the "simple" field jobs that would require a fork lift and engine hoist in the shop
Nice work. Very interesting as always. Thanks for sharing.
I love these videos, great work as always.
Love these videos thanks for sharing!
Greg . . . I see you use the good stuff -- Kroil. You can't beat it for breaking loose rusted bolts, nuts or anything else. ... When I worked with 3Ø, I always put the stinger leg on L3 if the unit used a 120v control circuit. We used the color code "BOY" (blue-orange-yellow with yellow being the stinger). Things may be different back East. But that color scheme is used a lot in California. ... Hope you guys had a great Thanksgiving. I ate WAY too much! ... Thanks for the video and the saga of the day in the life of an HVAC tech.
Have a good one!
Dave
Great video Gregg,
Many thanks for the upload
I always love it when I come to a machine cabinet where the hammer and chisel electrician went wild with a box of wire nuts.
you have some awesome mechanical skills,very impressive!!!!
Really enjoy all you videos. Just a little tip when installing bearings and pulleys apply a good coat of KoperKote or some type of never seez. It will be a easy task next go around. Keep up the good work and videos.
Nice work and great video Greg. I like those taper lock bushings. I used them on my lathe when I converted the spindle motor to DC and a Gilmer Belt drive.
+Nicholas CeeA
Oh they're great until you snap or cross thread one of those draw bolts. Done both. Not fun.
excellent video and diagnostics partner what a frickin mess looks like spaghetti world!!!!
Very Good Cesar Alejandro. congratulation . Brazil.
Great Video! Putting that motor back in place Was a Nut Buster! you could of maybe thru bolted some brackets with eye bolts and rope to hold the motor weight. something. I Probably Would have Drilled a hole in the top of the unit, Put a rope through the hole, put a 2x4 on top of the unit and rigged some kind of holding and lowering thing. then put a piece of sheet metal and 4 screws, some silicone to seal the hole or maybe a electrical hole plug and some silicone. there's no way i would have risked my back and fingers on that one, too heavy of motor. been doing this 34 years, i'm too old for muscling motors like that anymore. maybe a floor jack with a 4 x 4. something.
Great repair video, Greg. Man, you make me wince! I'd be wearing gloves! Must be an easier way to mount that motor. Keep up the great work.
+Dale Yurk
Hate latex/vinyl gloves and I always end up taking work gloves off to grab screws. End up just using them when touching really nasty stuff or using the rope.
I hope your apprentice realizes how lucky he is to be hanging out with you.
+PitWob
He's still in highschool. With me every other week on co-op
Well done.
"Blower is out and so are my testicles." haha. I've said something similar before.
OMG, whatever they are paying you isn't enough. I sure hope HQ is watching this video. Also, I hope OSHA isn't watching. Now I see where all those scars come from. Great job and thanks for sharing this video with the rest of us. Your assistant is trying to help you, but there just isn't enough room for two people. Pardon me for laughing, but your comments say it all while struggling to get that monster into position. Another job well done. Ken ...Marina CA
That's normal for HVAC guys.. Usually jobs like this get done in cold, dark, windy and what ever else you can think of.
+Ken Wolfe
Friday at 4:00 on a long weekend :-)
+Kenneth Bartlett
All in a days work. At least this unit has access. Usually they put that one screw in the most awkward to reach place where you have to crawl in head first and upside down reaching in with your left pinkie to get it.
hard on the hang me downs good job.
Nice work.....I hope that helper remembers that u didnt leave removing/putting back in for him to struggle figuring it out......
good job..thx
good video I like it
That is technically called an open delta system. Power companies make that decision to save money on the step-up and step-down transformers.. Regular delta and and wye systems all require 3 sets of coils in each transformer. Open delta only has 2 sets. Theoretically a 33% savings.
Love video. Why did you not use screw driver trick when u removed taper part of pulley u done it inside when refitting .liked your way of lining up the belt . perhaps you could comment the importance of the belt being correctly lined up.Luv videos
You have great common sense.!
Please Do more HVAC videos!
Generally, on taper-lock bushings, there is a second set of screw-holes you can use to push the pulley/whatever off the bushing, so you don't have to whale on it with a hammer. Did that bushing not have that set of screw holes?
Had them, but one had the threads all munged up so some gentle persuasion was required.
The damned engineers always put motors and pumps in the most hard to reach places.
Nice job, setting the motor, unbelievable. Were the bad bearings on fan in any way related to the triggering the rollout flame safety switch?
Different units
Nice, whats with safety's bypassed and jumped lately! Had two that were like that today....
Hall effect sensor fun
Put a screwdriver on the slit part of the taperlock should slide right out
We used a 520 lift back in the day...
Great video as always. Do you remember the size of that motor? Just curious
+BenP83
7.5 HP
I had the same problems with trane 1998 model. Draft motor run but no heat, what u suggesting me to do?
I'm sure it was easy to do in the factory. :)
+NuttyforNissan
Always is!
im going to fortis to be an hvac engineer i love it but ive been told a bunch of different things when it comes to how much we get paid... some told me that fresh outa school they might only pay like 10 bucks & some even said 20!
can you tell me roughly how much i might get paid
+Tom Bordelon i know that i was just wondering how much hvac starting pay is
+herb mcgruff it will depend on the area but in the rural south you start at 15 and city folk start at 20. if they are going to paying you less than 12 under the table or 14 regular pay find someplace else
+turinlowe thanks im from new jersey hopefully i start off somewhere between 15-20 i got a baby on the way i need the money
who makes that puller you used?
+awsom70
The black three jaw is an old Posi-Lock puller that has been in my truck since I started over 15 years ago and was in the company before that. The 2 jaw pullers are Craftsman's.
Hi mate. You better not show this one to OSHA, they might have something to say about you lifting that motor. They have no idea how things are done in the real world. Good video, thanks.
sweet job alway's help's to have an xtra hand to help out on y]them big unit's!!!!
Why are there so many assholes out there that make messes of control cabinets! Lennox Lga units were my favorite to work on. Good luck with the "in house" repairs you have to re-fix!
+Ken Wolfe
Yeah I do love the Lennox lay-out. There was definitely a new control board in there that looked a lot different than the original green ones I'm used to seeing. It's possible that is the cause of some of the wire nuts, but obviously not the t-stat wire.
Klein needle nose. Got paid twice!! lol
+mp3reed
A little evap-o-rust and those suckers are good as new and living in my toolbag.
Could you make a v ideo breaking down your tool bag?
+TheGhettoLobster
I have one here from when I got my new bag ua-cam.com/video/quUdz5x1rac/v-deo.html
with your fabrication skills you could probably re-make some of the tools used to make them more efficient...like the motor install ...a folding jack to take the weight while you position it.. just thinking
+s smith
Anything is possible.
+Halligan142
How many times have I used Klein nutdrivers as a punch with a crescent as a hammer. LOL.
In a pinch you can use the 5/16 to drive out a shaft from a fan blade when you cut it off.
s smith, we use a simple threaded eye bolt through the top of the unit and use a small ratchet strap. Leave the eye bolt on seal with urethane. Strap takes the weight and allows for easy placement.... And he needed to clean that wheel... Period
*sarcasm alert* Safety shmafety. They don’t need no safety switches!!
good thing didnt jumpout rs
Dismounting and remounting that motor must be a real pig of a job. Could you not devise some sort of a jack or crane to lift it up without straining your back so badly, it is obviously a nightmare to reattach it when you have great trouble lifting and holding it (due to the awkward space to work in) and cannot see to line it up to get it in the slots?
+Dan Whiteford
You can, but it'd have to be lightweight enough to get it on the roof and small enough to fit in the space. For me it's just easier to muscle the thing in. I know it looks like I'm straining my back, but most of the weight is on my leg and I'm using my hands to guide it. The tabs have to fit in at just the right angle. My problem here was once I got the bottom on the top would come out and once I got the top in the bottom would pop out.
How heavy was that motor weight wise? I am thinking about getting into HVAC, but before I do I figure I should probably make sure I have the strength to lift and guide something like that motor in.
Its not bad on the back Most of the weight was supported bu my thigh and leg. To me it's more of a hassel to try to rig something to lift it. If I couldn't lift it without hurting myself I wouldn't have tried. Granted I've also hurt my back by sneezing so anything could happen.
I'd say somewhere ~75-100lb range
My company would shit can you for no PPE.You have to were safety glasses to work the coffee machine
my company is the same way,bump cap,safety glasses and cut resistant gloves 24/7,it is a hinderance
Don't cut the red wire!!!
+Ken Wolfe No wait, cut the red wire, don't cut the white wire.....ooops.
+Kenneth Bartlett
Red we're dead, Blue we're through, yellow we're mellow
That motor was a bitch how much would you say it weighs? also get a hammer, screwdrivers and adjustable wrenches are not hammers. lol
Too much work . I would of quoted replace whole fan assembly
+KQP Twin
They don't sell it like that. It will come as individual parts and you'd have to do the same thing.
you need a new apprentice
put some surgical gloves on for christ sake!!!!
I like how these guys who don't know anything about electricity say, "This system has a bastard leg or a stinger leg." God that makes me laugh. Where in the hell do you come up with such idiot terms? How do you explain this, "bastard leg" or "stinger leg." This shouldn't cause you any problems at all. That just means that if the secondary of the transformer is a delta then you have one leg grounded so that you get 208. That shouldn't cause you any problems troubleshooting the control system like you spend 90% of your video troubleshooting. Nothing you are troubleshooting is dependent upon how the unit is fed. Come on man!
NEC disagrees with your analysis. Simply if you read the code, delta high leg should be wired b. I have seen a high leg and a 120 leg hooked to a single phase motor with obvious results. So it matters.
I know exactly what a delta high leg is. That is not what this guy said. I was referring specifically to the terms he used to describe the incoming feeder to that unit. He said, "The system has a bastard leg or stinger leg." Tell me where that is in the NEC because that was my point. Technicians and electricians come up with retarded names for things. Engineers have no need for such terms, so why do technicians feel like they have to name it something completely idiotic. The less ignorant you are about electricity the less you use terms like that. So when someone uses those terms I automatically know they aren't very educated. I start talking a little bit slower around them because they aren't too smart. You may hear an engineer use that term in front of a technician because he knows that is a term that they use, but design engineers don't talk to each other using those terms and they are NOT in the NEC. If another electrical engineer came in my office and said, hey I'm thinking about feeding this facility with a delta-delta transformer with a secondary stinger leg", I as well as everyone else would laugh him out of the office. I would lose confidence in the guy as an engineer. Use the proper terms if you want to be respected by those who ACTUALLY KNOW SOMETHING ABOUT ELECTRICITY.
Now the term "high leg" is used in the code and because of that it is common to hear electricians and engineers use that term. But again that is NOT WHAT HE SAID IN THE VIDEO. He never said, "high leg."
He should have had 208V on that "high leg" unless the tap on the transformer was adjusted so that is wasn't geometrically or electrically in the center, then I could see there being 180-ish volts up there. He should do a video showing how that transformer is tapped. I bet you someone adjusted the taps inside the transformer. Anyways the 208 or 120 was not my point anyway. HVAC techs and electricians or anyone who pretends to know something about electricity needs to stop using those retarded terms. I seen an HVAC tech video where the tech was explaining to everyone watching say "this capacitor is a 40 you eff." He went on to clarify, "that's just manufacturer lingo..." What the fuck?! He means 40 microfarad but he says "you eff." The "you" is not a "u" it is a greek letter mu which to those who are educated in physics, chemistry and engineering know that mean 10 to the minus 6 which is another way of saying micro. Again and again. I guess this is why people choose vocational schools over college. They prefer not to understand the hard stuff. It's like they don't want to use the proper terms because they may sound smart and in the trades you don't want to sound smart by talking, "all that engineer talk."
you seem to be drunk with your knowledge of electrical terms. I think all who are on here find this inappropriate. This man is simply trying to educate the mass who choose to pursue in a like profession or for those who enjoy watching a man do his job well. I hope the next time you visit your medical doctor, you have finished your internship, least he/she laugh you out of office for a lay term. Besides that, why would you expect an HVAC man to know about the turns ratio to compensate for supply variances? Instead of criticism of simple terms used in the trade, try to humble your remarks with kindness so they are accepted well. This is the way I was taught while attending college some 30 years ago and if you ask me, you would appear more polished and professional by doing the same!
I agree in that he did a good job and I enjoy watching his videos. Just stop using retarded terms. He learned these stupid terms from some guy who didn't know what he was doing. This guy seems to be good at what he does. If he is trying to "educate the mass" then he should speak using terms that are appropriate. He may say something like, "Some people use the term stinger leg or bastard leg. I'm not sure if those are appropriate terms for a center tapped delta secondary, but you may hear electricians or technicians using terms like these. " Then he has done a much better job explaining electricity to younger guys who may want to chose this profession. And he may get the guys that are using these terms to instead use the proper terms. Then he would be doing a service to everyone.
Impedancenetwork
I bet you don't have any friends.
Worst motor design ive seen in à while