GROUNDED COMPRESSOR AND AIRFLOW PROBLEMS
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- Опубликовано: 11 апр 2019
- This was a grounded compressor replacement on a Lennox Package unit, than I also found some airflow problems.
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Chris you are a dynamite tech, wish we had more guys like you in the feild. Always a joy watching your videos.
Thanks bud I'm really nothing special just a curious mind that likes to solve problems and share the little bit of knowledge I have
@@HVACRVIDEOS I myself am a problem solver. It takes many years in this field to get to the point we're at. Keep it up
@@HVACRVIDEOS And a stickler for details!
Absolutely I agree! I greatly appreciate your videos
the problem is the people who can do this job at this level rather be the engineers that design the equipment because that pays more
Codes are only a minimum standard. They are like going to school & getting a D grade. Jobs like this are rampant in the hvac industry wheather residential or commercial. Those who try to do jobs up to a standard instead of down to a code or price, learn quickly that they can’t compete with the rest of the industry doing garbage work for a fraction of the price. So if you hold firm with integrity & work it up to a standard, you actually end up getting the customers you really want to work for. Unfortunately they are 5% of the overall market or less. We sell an invisible product, hot & cold air. Snake oil salesmen are everywhere! Be different & you stand out! Thanks for your videos, you make the world of hvac better one video at a time!!
Thanks bud
As an electrician we found a brand new fast food restaurant wired with MC cable from one end to the other and all of the controls for lighting, HVAC, etc had bare THHN wire passing through the back of the enclosures with just electrical tape as the connector through the open space in the wall cavity. The place passed all the inspections and the restaurant was in service. They had canopy lights that never worked from day one that just had MC cable poking through the wall and not even connected to anything. We were called out to check out why the canopy lights in the drive-thru wasn't working. The boss was like "wipe your fingerprints off everything and run out of there"
I really like the talk at the end about people not doing their jobs correctly. I see it ALL THE TIME working on cars, it pisses me off! This restaurant probably needed new AC units i'm sure and part of their issue is the guy who sold them this unit without knowing the building, Another part is the guy doing the duct work for the building size incorrectly. But what it really boils down to is the one person not doing their job at the start of all this. They started the snowball effect because they didn't plan this building with a goal in mind and follow it A-Z to make sure everything will work in harmony. This is the reason i get with my customers and we build vehicles with a certain goal in mind, that's our foundation for the build. Without a goal in mind what are we doing? We might as well get the biggest AC units we can and install them on residential homes because the sales man said it can cool the most air! It's nice to see you always going above and beyond your required duty to help fix the real issues.
People look the other way until something bad happens then they look to blame someone. That is why no one is allowed on our roof without insurance. I love the way you teach. Thank you very much for taking the time to make videos I know it’s time consuming.
This is so Damm true of most any job. Bosses look the other way until someone is hurt or they get in trouble. Then it's always someone else's fault.
Greasy money slides easy.
Your fighting a fight that all good techs see, glad you care, so many don't now & it's very sad.
When I was in business I was the only contractor in a large metropolitan area that actually tested the airflow after the installation and wrote it on the document attached to the furnace several heating inspectors asked me what the hell I was doing and why. at the local heating contractors meeting I stood up and asked to show of hands who owns a airflow meter no one did. Airflow is the basis of what we do, no but no one knows how to measure it what the hell!!!!!!
This tells that inspectors dont know what the hell are doing.
90% of heating and cooling issues are about airflow!
What annoys me is that when you bring up the issue the question is never "what can we do?". It is always "how much?"
HVAC minus airflow spells HAC...
I appreciate all the links for the tools you use on your videos. I do HVAC for a big hospital here in Tucson, AZ. Picked up the quick flow manifold and it really sped up a reversing valve change out I did last week. Keep up the great work, brother. I'll definitely be coming back to these videos.
I'm a federal employee and work on a military base in NC. When we have buildings renovated by outside contractors, a test and balance is suppose to be performed on the system. What is upsetting about this is the fact that we have our own inspectors on base who allow the contractor who installed the system to "perform" the test and balance and submit the report. Do you think the contractor is going to fail his own work? It will drive a tech who then has to work on it insane. Great videos! Keep up the good work!
Same airflow problems over here in France , mate ... same sh@t , different country !
Great vid as usual , Chris , thanks again for the work and time you put in , truly appreciated over here 👍
If you can’t install a suction dryer (which should be removed after 24 to 48 hours of use) you should install ball valves and a flared dryer. This allows through pump down replacing the dryer. Perform an acid test to see if it should be replaced again.
Great video. I always get crap for taking my time at calls. I tell the office that rushing creates call backs.
I will be going live on RUclips this evening 4/15/19 at 5:PM (pacific time) if you can come over and watch the stream ruclips.net/video/Ft4L_-G7zzI/видео.html
Great video! I use these videos to show my students the right way to do things out in the field. Keep up the good work! Thanks.
Thanks bud
As a tech just learned a very cool tip ice bucket you’re very smart God bless you and your family thank you so much 😀
I usually recommend using the rags pop up, they're just white rags, tearing them into appropriate sizes when working on sensitive valves like that and soaking them before welding on em. Been in the industry since 06, just a thought brother. Good vids though, love em.
Thanks bud! I will be going live on RUclips this evening 11/18/19 @5:PM (pacific time) to discuss my most recent videos and answer questions from the Live chat, RUclips comments, emails, and Facebook comments. Come on over and check it out ruclips.net/video/NjeFrNCiAEs/видео.html
Those popup rags are paper towels, mainly. I use bagged cotton 'jersey' fabric rags. (I don't do welding or brazing, only electronics soldering - I use them for other things)
Nice video Chris thanks for the heads up on the faster recovery method
Heating and refrigeration equipment is sexy. It's more complicated, the customer gets to make choices and that keeps the sales folks interested. It's more interesting to troubleshoot. There are replacement parts to sell. Fans and ducts aren't sexy - they need to be cleaned (eww) and the belts and motors eventually wear out. Otherwise it's so easy to forget them.
But at the end of the day they're the foundation. HVAC minus care and attention to airflow spells HAC.
I've learned a lot watching these videos. amazing.
Good find I'll have to look out for that. Sometimes I seen the compressor terminal plug switched
as a commissioning technician, I was desensitized to this kind of scenarios. the fault is either to the contractor who has had to finish the job on that area leaving the next contractor to negotiate his install spaces. ei: plumbing guys installed their first leaving the ductman to have a smaller duct or an odd angle for a turn. this is especially to kitchen install were there are water, electrical, fire protection, fresh air, exhaust air, AC and refrigerations. or the engineers who proceed with the bad install or consultant who does not care.
I usually recommend on air duct that is under requirement to augment the ducting with a tube axial blower for booster fan to facilitate air movements on a duct. or a variable damper with built in blower on each air outlet.
I was just thinking about Title 24 the other day and wondering if it was effective. Thanks for the answer. I'm in FL and we have the same issues here, probably worse. There's a brand new Denny's in town that's negatively pressurized just about enough to suck your eyeballs out and relative humidity levels over 70%, with mold everywhere. Another restaurant I worked on recently has had the heat and cool setpoints on the Aaon DOAS backwards for 12 years. But it looks like more regulations and supposedly independent testing isn't effective. It's frustrating for those of us that care!
You are doing a lot more than most out there.And remember you can't solve everybody's mess ups.
I admire you and your work a lot. But there is always time for a wet towel. 1st time I've had to disagree with you.
I would learn from u and nobody else. Master.
Great video. Try the push-pull method of recovery ,if you get a chance.
It actually turns your setup into a refrigeration system and the recovery tank gets cold .
Thanks again for your videos.
Has to be running in order to do that though.
Great videos! Thanks. Two comments. I don't totally understand your reasoning for not installing the suction line dryer. I do realize it's a judgement call, but it seemed you lean toward the inconvenience option more. As for laws....they are only effective if communicated, funded and enforced by a trained, experienced and ethical system. Keep doing what your doing....your work helps to educate those interested people who do want to know and do better. Thanks again.
The issues are that people that pass the laws are generally _not_ ethical, criminal minds aren't going to obey the law - I mean, it's rather a requirement for the 'job' of being a criminal - and bureaucrats are generally focused on retaining their job, not on _doing_ their job. Union mentality _heavily_ assists this. You can't get rid of someone because they're incompetent, because.. well, union (or government employee). Seniority over ability, and so forth. When you combine all of those together, you get situations such as the Beverly Hills police officer that tried to arrest someone for driving with a Canadian license. (To be fair, it happened in Georgia too).
As for the line dryer, he said it straight out - he could fit one in, but trying to remove or change it later would be a nightmare.
Do you have a video on airflow and explaining how the measurements should be and how to rectify issues? I get the gist but going through the comments everyone is saying "measure airflow" but what does that tell me? What can airflow and pressure differentials tell me? I'm sure a lot and I'd like to know more in layman's terms rather than technical. Just my thoughts. I know you want to avoid bends and long runs but just doing a walkthrough like your other videos would probably be very illuminating. Thanks.
Awesome job as usual. Only a couple things I’ve would’ve done. I always wrap the small valves. And I always add acid scavenger on comp replacements. It’s cheap insurance in my mind at least lol.
Agree with you on the restaurants. I work in many, from large chains to mom and pop. Yet to come across a perfectly designed one. Close but usually can find an issue or two.
I will be going live on RUclips this evening 4/15/19 at 5:PM (pacific time) if you can come over and watch the stream ruclips.net/video/Ft4L_-G7zzI/видео.html
Yes I agree Same issue Through out all the state and Not just commercial Residential too👍👍👍
Oil return problem-also check for proper piping on the riser-some systems that unload require double risers-Check book -proper piping practice-excellant reference
It's a constant battle with restaurant air conditioning. Apparently everyone forgets the "air" in ac🤣😂
I know right.......
they only care about the C= cold.@@HVACRVIDEOS
Exactly
I feel your frustrations Chris! I see the same things happening here in Toronto. And I look like the a$$hole when I have tell the customer that everything is wrong.
"How is that possible?" "I paid good money for this!" "You dont know what your talking about"...
And so on and so forth.
Great Video man! Thanks!
Thanks bud
The other 1 is “but the inspector approved it”. As a boiler guy I run into that all of the time, especially in the suburbs where there aren’t very many boilers. When I was in school 25 years ago we were told that boilers are a dead technology and we weren’t even trained on them, so there’s a huge shortage of competent boiler techs. I had to take night classes and just read manuals on my own to learn them. Stuff isn’t piped correctly but the inspector still signs off on it. I just had 1 earlier this week. It was installed 1 year ago by another contractor and the backflow preventer was leaking. Instead or replacing the backflow preventer the installer just turned off both valves on both sides of the Watts 9D, the problem is that with both valves closed the expansion tank was no longer in the system because it was piped in between the outlet of the Watts 9D and the 2nd valve. The only reason the relief valve hadn’t popped is because they never purged the air from the system. There was so much air in the piping you could hear the circulator surging and cavitating, but the homeowner said “it heated fine last winter”.
Welcome to CA. When we remodeled our restaurant we had to add $15k worth of electrical/lighting to meet T24, everything passed but nothing work/works right. Money well spent
Sadly that is the truth, I've seen many restaurants with all the title 24 required items non functional simply because people don't know how they work and or how to work on them
Speaking from the perspective of a former HVAC engineer, doing jobs in Cali I can remember the reviewers and inspectors being very thorough with their reviews, and even going as far as double-checking our own calculations for airflow and unit sizing. On that job its almost like they have the right units, but they decided to just reuse whatever was existing within the space and just plop some curb adapters down. I doubt they really redid any of the ductwork from whats there, but cant say for certain without seeing it myself. Definitely a hack job and either it was a shady engineering/construction consortium they went with or the customer/GC ignored the intended design. It does happen and some of the big construction outfits had ways around doing things properly. The only recourse at that point was to refuse the job and turn over the design liability to someone else.
Another master piece. 👍
I'm a TAB tech on the East coast. When I do restaurant jobs especially, I take a building static at the front and back door before and after balancing all of the systems. We also take full static profiles of all air moving equipment which quickly diagnoses any airflow issues, and I get them addressed with the mechanical company IMMEDIATELY. It is hard to understand how/why issues like this slide through the cracks without being addressed.
Great job again
Airflow is critical for any system somehow is the most neglected area in HVAC.
Man you one hell of a tech bro
Ductwork seems to be the most ignored thing in the industry. Most customers don’t get the efficiency or performance that they should with their equipment . There really is a deficiency in training and engineering. That’s why I like these videos .
Well also because there will always be that guy that will do the job faster and cheaper.
And the customer who doesn’t care how it looks or works goes for that guy
Same problems here in Fl. Buildings running in negative building pressure and no one cares. Humidity the walls, wall paper falling off the walls.
ALL You can do is work with what we have.
I hear you
My work did this.
It was originally designed with a makeup air system for positive interior pressure. Fresh air and all that.
The MUA units never worked correctly, so they were shut down and isolated, and the entire system was just put into recirculate.
It also never QUITE worked right, but it worked well enough that nobody cared for years.
By time they started seriously considering repairing everything, one half of a tandem unit was dead and being raided for parts, the unit for my specific area had to have the fan running all the time because of thermostat problems, the fan was always failing because of that, several indoor blower belt problems, and we had another unit that I voiced that it kept breaking down a few times.
It took a hurricane (and the ability to claim it on insurance) to finally get the entire system torn out and replaced with one that has a working MUA function.
We've been having trouble with the new system too, it seems the technicians are out once every few months to fix something (condensate backups, malfunctions, etc).
I’m only 10 and I’m building an air conditioner! It’s going to have a scrolling display just like this unit.
Thanks for pointing out the Bureaucratic crime in California. Thats what it is. Pay me and I will sign off on it. Passing the Gov. Code inspection... Its a shame!
I understand your rant. In my work, I run into many, many occasions where it wasnt done right the first time and I have to come in and fix it, yet again there are "standards", but they werent followed or properly verified. Its sad, but look at our political system, need I say more. Its time for a change...
Amen
I Work for an air balance company and I watch your videos to learn more about the service side. You do a really good job. If the Herz tester or anybody else is Calculating the airflow based on the fans static pressure That is a problem. The only way to get a true Total is to measure the registers or the ductwork with the proper airflow equipment. In regards to the unit with low airflow, If the return dampers are closed you would expect the return static pressure To be higher than 0.3 because the fan is trying to suck but it’s restricted. Just curious did you end up opening The dampers on the return side and seeing if the airflow increased?
Jameson Rosene I use static pressure on service calls to see if I have any airflow restrictions. After performing a visual inspection on the ducting I use static pressure and RPM to determine the CFM output of the motor. Unfortunately I don't have a flow hood. So I'm limited to traversing the ductwork with my hot wire anemometer or mini vane anemometer
chris you are not supposed to ever tip a scroll compressor to a 90 degree angle even if you are trying to drain the oil. The oil can enter the scroll and cause it to seize. Id recommend pumping it out. Im sure you've been fine doing it this way. I just recommend it out of caution
Recommend ball valve between core tool and micron gauge
16:44 - 16:52 If that was a system for your truck....You'd be bumpin bass 10 miles away😂😂
the problem with the airflow thing is 90 percent of the hvac techs i talk to dont even know what total external static pressure even is,and they make 40 to 70 dollars an hour
That is a true statement, I cant tell you how many new restaurants I have taken over and the static pressure holes that the test and balance guys have drilled into the unit are only getting the pressure drop across the coil instead of total external measuring return and supply..... so their balance reports always have really low total external static pressure readings on them.........
Well spotted, I honestly think that I might have missed the switched controls.
Man your awesome keep up the good work
Thanks bud!
Did you use acidaway on the burnout compressor?
Love yours video!
Thanks bud
Something that I do as a general rule when I have a grounded compressor and once I remove it, the txv and the liquid drier I always flush the system at least with nitrogen even if the compressor has most of the oil in it just as precaution since there are 3 different parts open in the system already might as well and flush the system on those open areas to avoid particles or oil left from the old compressor getting stuck on the liquid or suction drier in the future and avoid to replace the driers later on (just something that I like to do as a precaution if I lost a lot of oil I'll definitely use nu-calgon flush)
We all know money buys passing grades. I'm in SC now but when I was working and living in NY you had to pass a white envelope with money in it to pass inspection. Even if you did everything 100% by the books the law gives the inspector the power to interpret the codes as they see it which they twisted to fail people who didn't fund their extortion attempts. Brookhaven NY was the worst they got cracked down by the feds for it. It's an open secret money still buys a passing grade but now doing it right doesn't give a failing grade for not paying.
Crazy
I really wish txv manufacturers gave some longer ports to braze. They want you to protect it from heat but give you no room on some to protect the valve and be able to heat up for brazing.
amen to that!
You can use the spray gel to protect the valve. No offense, but I think you cut a corner in protecting the TXV.
Also, I didn't see a suction line drier. The oil being as black as it was, I would have figured a flush and a suction drier would have been very important in maximizing life of new compressor.
always replace both filter driers when replacing compressor it was on a few test iv'e taken in school.
i was thinking the same,wrap txv and either change oil on compressor several times or add suction HH drier
Dan T I keep cut towel strips in my torch kit and all I need is to just grab one of my bottled waters to use it real quick.
Yeah the txv had me yelling at my screen for a second. Also the suction line drier, cause there is some burnt up stuff. But since it was only 6oz minus whatever was left on the walls of the compressor, prob fine with no suction drier.
Spray gel makes a mess. I never use it. A wet paper shop towel works best for me.
great video and professionnal 👍👍👍
Thanks for watching and taking the time to leave a comment
Nice video.
Right on in Phoenix is the same way I did a lot of air flow in ever building they get payed off air balance is a big problem even when you get certified air balance it just bad
👍🇫🇷😁 Thank !!! Merci !!! Muchas gracias !!!
I use curved adapters more than once and I never had an issue with them. I do believe you have to try to match some what of the herb as carrier units in Trane units Supply return a completely different. I never had any issues with that. 37 degrees discharge temperature depends on how low humidity is. I think you said you're in Palm Springs I'm not sure what the humidity is there but in Reno Nevada it's under 10% and I've seen some really big time temperature drops because there's no latent heat. If you have duct problems most of the time people aren't going to pay to fix and you'd have to tear the place apart. That economizer being open 100% to the outside suction pressure decreases was it really cold out? Curb adapters do work and work well
In order to open the damper from the potentiometer like that, don’t you have to set the DIP switches both to the left?
so with a MAU unit and exhuast fans in kitchens can you give me a basic formula for w.c negative or am asumming positive with pressure in kitchen
Value Engineering is a fancy construction term that means that the building owner, or Engineer, or Contractor was too cheap to do proper job. High static due to poor duct design/installation is a very common problem. It bothers me too.
Seems to be the same problem everywhere. It don't matter if it's an old or brand new building. I seen it on brand new buildings, an I always wonder if the engineers think it's gonna work properly, or they just don't care if it does or not.
Funny , I saw a fancy very posh brand new store getting built up right before my eyes , and the surface was completely open, with 2 stories and a super high ceiling, but the geniuses in charge thought it would be enough to have a couple MUA units with tiny super narrow air vents , only and exclusively on the top ceiling , and that was supposed to cool the whole bloody store 🤣
Now , I'm definitely not an expert in sizing AC , but even I when I saw that , my 1st reaction was saying to my boss : dude , that's never gonna be enough , it's gonna be super hot in here !
And his answer was , and he was 100% serious : the people who sized it know what they're doing , it's gonna work don't you worry !
Of course, as soon as they opened , they started complaining about the heat 😋👍
Nice job
Thanks bud
The laws are there to make the tree huggers happy. Not that I'm against conservation.
End of video. Doing good work. It can be a curse in my situation my good work was always cleaning up someone else's shity work. I was okay at first but when they are paid more, well you get it.
The rare instances when I get to do the work new I take a little longer but the customer can see a huge difference immediately.
Whether it be a custom wood desk or a cubicle or cutting concrete, heck loading a truck even! Good work is not done by everyone. Even if they are trained and certified.
One cubicle install, "6 pack of open design" with 7 people working at where I went to troubleshoot their power cause they blamed our product. I had doubts and was right because the electrician somehow let ground and hot be hooked up incorrectly.
The electrician lied and said that it was a galvanized (grounded) fitting that was "cutting into the sheathing" and electrified the whole set of cubicle panels. But me knowing the schematics and how the freaking frame is hooked to ground! Knew that was a lie. I know that they screwed up bad because if it was really grounded like it was supposed to, that breaker would have tripped the moment they turned it on.
When troubleshooting i went to pull myself off of the ground and all I did was put my hand on the edge of painted metal and I could feel the voltage going through my hand. A lot of people's work sucks! And its what I have found out in life to be true acrossthe board of jobs I've done. But I wonder is how they stay in business with all the crap they leave behind?
Yeah most customers don't understand quality work anymore..... they want cheap and fast and they get what they pay for!!
Kinda off topic but do u use a puller to remove your motor sheaves? And if so what sizes should i carry for light commercial?
Yes I do I will try to show it in a video
I have 2 a larger 2 claw one that's good for about 10" pulleys and a $20 3 claw one I got at an auto parts store. I use the auto part store one 99% of the time
Nice!!!
I gotta call you out on brazing w/o wrapping that TXV in a wet cloth - silfos flows at 1190 degrees F - that heat WILL conduct to the valve body, I don't care how fast you hit that joint, that heat is flowing into the valve body and deforming nylon or teflon bushings, o-rings, or gaskets.
great job chris! you are the man! i have to know but where did you get your sman 480's from?
I am on the beta testing team for fieldpiece so I occasionally test new tools for them
Oh ok. I really like the wireless clamps
Ran into that problem yesterday onli the return air velocity is so high it keeps on pulling hot air into the system and space from the gaps in the door , also the kitchen exhaust is being over powered by that return air pulling so hard
Did the pressure controls have schrader cores underneath ?
I also recover through the vapor and for the same reason. But why turn the recovery tank upside down?
Don't be afraid to use a squirt bottle with water to cool that valve down the second you're done, you put a lot of heat to that thing.
I would have used cooling gel around the expansion device and added acid away to the system , as the comp had burnt out, the shellac on the windings turns to acid.
So these high level building ventilation codes have to be meet with older buildings? Seems to me the goal post is always moving..
Yes, we dont necessarily have to bring an old building up to code if they aren't doing any work. But if you pull permits to replace anything on a building that piece of equipment you replace had to meet the energy codes. So when they built the new restaurant in this existing shell they were supposed to meet all the energy codes.
Another excellent video, the unit in profile picture has just been upgraded to same unit but newer version. Unfortunately the idiot who installed it didn't do a pressure test and its had a leak on it over a week or two and has now lost all its gas on an overtighten flare nut connection on the high side. Through an hour or so of noticing the leak the compressor was getting faster and faster and compressor discharge at one point was 110c before we shut it off as there was no cooling. There was oil spitting out of the leak point but not what appears to be massive amounts. Would you say the unit needs extra oil? I was also under the impression that oil in the pipework and evaporator would make it's way back to the compressor?
thanks
Awesome exclamation on how many times the ball gets dropped . But like you say the ball did not get dropped it was actually looked over ignored money and profit talk first as long as there’s no enforcement with very strict punishment like suspended license for 4 to 6 months holding all parties accountable for paying to retrofit and fix the mistakes after they completed their job this kind of work will continue and then Spector to enforce codes to shut their mouth turn their head and walk onto the next job
R-11 flush after a burnout is a good idea too
Can i ask what sort of pressures are experienced in these systems, i am not an HVAC tech but work in aviation and we have compressive swage fittings that can operate safely and not leak a drop at 3000psi in aircraft hydraulic systems. Watching you guys working with that flame in confined areas seems like a very old school way of joining pipes.
Typically our operating pressure do not exceed 600psi unless we are using Co2 than the pressure go much higher, but I personally dont deal with Co2. I will be going live on RUclips this evening 12/23/19 @ 5:PM (pacific time) to discuss my most recent uploads and answer questions from emails, RUclips comments and the live chat, come check it out if you can ruclips.net/video/K3iG5q_Q_0U/видео.html
How do these compressive swage fittings work? I feel like i'll get a direct answer from you instead of going to google. :)
@@jonnywilson9117 look up Permaswage for the aviation version or Propress for the copper plumbing version. I have personally used permaswage on military aircraft .they are basically short lengths of tubing that have seals pre fitted inside. Slide them over the existing tubing and crush them on with a hydraulic press tool. Approved repair , can hold 3 to 5 thousand psi dependant on spec. Never seen one leak. Obviously there is situations where this type of fitting simply is not going to fit but it does get rid of the open flame.
$$$ < thats how things pass inspections
Exactly
Same in europe, don’t worry about it!
Inspection companies that fail systems (on good grounds) are still not asked to reinspect the update and the next building and the neighbour won’t ask them also since he heard “how difficult they are doing about nothing”.
And make the build delay (do it good first time and no delay but hey always blame the other guy) and expensive and all.
They will be out of money fast without jobs to inspect.
I am afraid not even state inspectors will help since they will have friends that get by more easy, because he trusts them after a few times and starts skipping going to the roof or into the ceiling or what not.
It’s just insane the things that happen. And not get noticed.
I once worked a packageunit where the 24v for the economizer and 220v for a hot water pump got switched at construction (10 years earlier).
We were the first to take the complaint of not getting warm seriously (we took over maintenance contract from the previous company who did the install/build also), and investigated.
Pump was not running so we thought it to be broke and ordered a new one. Installed, nothing so we measured voltage. And that was when I saw the arm from the 24v motor to the economizer was disconnected. So we checked it also.
We found a 24v motor in reserve put it in and switched wires at the controller and it all worked. For the first time!!
Great catch! Question though!
If PS1 is installed on Compressor 2, and compressor 2 is low. how is it that comp 1 is running?
What I am saying is if PS1 is detecting low pressure regardless of where it was installed, then comp1 should not be running which it was.
In Wisconsin don't know of a single contractor following any Ashrae 90.1 or IECC. Maybe that's because no one is verifying anything.
Dont always have time for a wet towel but has time to measure comp oil. Lol. Disagree with some of the things said in this video. But hey you do you
Normal Winston lots of heat on that txv. U can overheat these on install.
I love using thermo trap on txvs if I notice I need to add more I just spray it to the txv and no need to stop bracing
Airflow on home units same, any new system should be within spec on SP, which would cause new correct duct work and $.
HERS rating should not be done by private companies. It should be done by the county in which the system was installed. Private companies benefit too much by passing what shouldn’t be passed. If a rater fails a contractor they’ll be less likely to be hired again by said contractor.
I know you don't like to add anything to a system that isn't OEM but what about acid away since you couldn't fit the suction drier in. I've never had any issues adding that to burnouts. I agree with you on the TXV, as long as you don't linger with your torch on it you are usually safe as long as you cool it right away like you did.
I have used acid neutralizer's before and have never had any problems with them, I've just been trying a new route lately. But you bring up a great point, it would have a perfect candidate for a neutralizer, since I couldn't fit a suction filter in there. I have been really having a hard time with these chemicals the supply houses have been pushing with no proof that they work other than Nu Calgons paperwork........
Can you not use flux on ac systems?
Why replace the TXV when you do compressors. Assuming it's still good? I noticed that whenever you do a compressor you do a TXV. THANKS
It's cheap insurance, you have no idea what killed the compressor and you also have no idea if whatever killed the compressor damaged the TXV so if the refrigerant is already out of the system you may as well replace the TXV also.
Noticed the curb adaptor is offset pretty heavy. I bet they up sized the unit from 10 Ton to 12. Might be problem
I know this video is old but when I have a system open and the txv is out I like to sweep nitro thru to get any trash out of the system
Graft and corruption pervade the entire building inspection system nationwide. Developers/politicians always “help” each other.
Good work.. Why not do a system flush if it was a compressor burout?
I try nor to use flush because it's a harsh chemical for the system. This burn was not that bad so I didnt see the need
Question, doesn’t the micron gauge have to be connected to the suction line?
No it can be connected anywhere on the system. Best practice is to have it as far away from the pump as possible to show the real micron level of the system though
HVACR VIDEOS gotcha, thanks Chris
nice video again, why you dont try to get the suction filter drier on flare, so you dont have to mess with heat in such small place, i just wonder, you are the pro here
Hey bro what kind of gauges are they .. are they homemade
No the manifold I used to recover with is the Appion Mega Flow kit and i added the yellow jacket gauges on top.
Did it take a while to get used to digital guages
Yes it did, I still reach for the analog's out of habit.