HEATCRAFT QRC INSTALLATION FAILURE
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- Опубликовано: 21 окт 2024
- This was an installation of a Heatcraft QRC evaporator and condensing unit on a beer walk in that ended in a failure on my part.
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Whilst the transducer might have cost $250, the lesson learned is priceless.
I'm not a HVACR guy but I love your videos; the diagnostic techniques you use translate to so many industries.
Everyone makes mistakes, too few learn from them.
Keep rocking man 🤘
Dan Jones I literally watch for troubleshooting. Lol I make a number of the mistakes he mentions in terms of techniques.
Jeez I would have never guessed that part to be $250. Maybe $50-75 was my guess
@@KThach. Apparently, this was a CHEAP pressure transducer. A bit of Googling: "General Industrial range from $200 to $800 per unit." 😲
This video not only demonstrates the problems but the recognition of solutions you have at your fingertips. There is nothing more humbling than facing a problem and not having a clue how to sol it. Your mind will take you places totally unrelated and your journey down a spiraling hole begins. Your videos demonstrate your command of the "bigger picture" and your fluid ability to pull solutions that are correct. It's a pleasure watching you work. The mistakes are great too they make you 'NOT' Superman.
Wife and I own a small business that came with a heatcraft qrc walk in freezer unit that had been plagued with issues (poorly trained techs) for some time. Your videos have helped greatly. Replaced weak evaporator fan motor, thoroughly cleaned micro channel condensing coil, still getting error for low superheat. Hooked up gauges, went to suction pressure in monitor function, found gauge showing 23 and transducer showing 57. Sat and let unit run for a while. Gauge stayed between 20/25 but transducer was going crazy. Dropped to to 2 and rapidly rose to 167. Gauge held steady just below 25. Checked harness and all good. New transducer is on its way. Talk about sticker shock! If only I knew the psi range of the oem transducer so I could use a Johnson controls unit for half the price and fully sealed. The poor/incorrect work I have found on our equipment done by “professionals” blows my mind. I was a master certified journeyman tech for 15 years for heavy class 8 trucks and the kind of workmanship I’ve seen on commercial hvacr is absolutely unacceptable in my background. Thank you for your attention to detail. Doing things correctly is almost always easier than rigging something to just work.
I didn’t do much for refrigeration so I love watching these to get a different perspective.
I've picked up so many different little tricks and ideas from watching your videos
Really good to see you put an oil trap in the suction line. Tech Guys - Please copy this guy as he really does a correct job
You mentioned having to support your line set,...if you’d have left the Condensor support 2x4’s longer you would have been set. Coming from a 25 year background in Union Carpentry.
I really enjoyed the video. I appreciate your integrity in owning your mistakes. Very nice, we all make them. Love that tubing bender! ...and all the other really cool tools and gauges. Keep up the great work and videos, Chris. 5 ⭐️⭐️⭐️⭐️⭐️👍🇺🇸💪👊😎
Integrity is priceless. Good job. No one above mistakes. You recove super fast. I dear say very few people would have determined what the problem was for one reason that quickly. And most would have like to believe that it was a faulty part including me. But you recorded what pressures you tested with and reviewed. That awsome.
Darlington Electric
Very sharp and on-point. Excellent narration, word usage, etc. High level of presentation, workmanship and skill base demonstrate commitment and integrity.
Good video and like I tell my guys, "Everyone makes mistakes (from time to time) and if you don't make any mistakes, you're not doing anything".
You are thorough which is not freaky but the mark of a professional who cares about his work Proper preparation prevents poor performance! The five P method.
I've always heard "Prior Planning Prevents Pisspoor Performance"
Same idea.
Proper Planning Prevents Pisspoor Performance is what I've heard
@@troyboi6106 You can go to this level if the first message doesn't sink in.
@@stephenconnell Proper Prior Planning Prevents Piss Poor Performance. Lol
@@SupermarketRefrigeration Love the P ing going on here. Keep it up expecting high performance.
Man you are a very patient person. In my neck of the woods, I would have been tossed head first off the roof for that wiring mistake. This is a priceless video. Thank you for taking the time.
I like how you moved the little grommet out of the melting zone. Your attention to detail is awesome. I agree with the others in here, the little installation errors made for a highly valuable learning experience. Not sure about HVAC college but in electrical the instructors would break our labs like that for troubleshooting exorcises. Thanks for another great video!
Your videos are not boring they are very informative and give alot of info and all for free thxs
I love shaking hermetic compressors while pulling vacuum since I saw you doing it first time. Great tip-trick! 👍
Thanks for showing mistakes too. Probably save a bunch of us new guys through your experiences.
nothing warms my heart more than he saying: "ok?" in the end and perfect cut after
I like the fact you don’t leave your errs out. My teacher used to say: A smart person learns from his mistakes but a wise one learns from sone one else’s.
I will talk about this on the Livestream this evening 6/15/20 @ 5:PM (pacific) come check it out ruclips.net/video/49GnnChaC6g/видео.html
I appreciate the honesty. I really like your channel. I find myself out on jobs and thinking back on things you have said or done and it has helped me, especially you have helped me get over the bad mindset that comes with the dreaded long day after-hours call.
I'm going to school for hvac/r it showing me alot seeing the work you doing and teaching in&out with clear understanding i really enjoy the video and im in my refrigeration class so this just make me more confidence
This video thought me to read and read, and read again, and again if necessary the Manufacturers Instructions and take notes if possible.
Again. Thank you for your videos.
Love the videos and the real life honesty of your installs. Please keep them coming.
While we all strive strive for perfection, things do happen. All you can do is learn. Great video
I tend to watch your videos all the way through, usually enjoyable and very informative, I don't work in the HVAC industry, but the steps you take to diagnose each unit are usually pretty logical and make a lot of sense to me.
I love how Detailed You Are😄😄
Like your other videos, this one was excellent. Code in our area mandates that we precisely follow manufacturer's instructions for installations. Failing to comply with code becomes a liability issue. So although it might drive other people crazy, I read the installation manual cover to cover no matter how many times I have done an install. In 42 years of doing mechanical and HVACR work, I have seen many many changes in equipment and practices. I still make mistakes occasionally, but more often than not, the practice has kept me from making many huge ones I would have otherwise made. You are an outstanding technician, not only because of your knowledge, skills and abilities, but because of your honesty and integrity. I have seen many really talented dishonest technicians, or honest incompetent ones. Either way, the customer loses. You are much better than either of those.
Thanks so much for the nice words bud!!
Not every job is in and out. Some take time and patience. Good stuff Chris. Thanks for sharing
Any time a notification pops up for a new video from your channel it always makes my day! Keep it up HVACR videos.
I wouldn’t call it a fail, it was a lesson learned. You do great work!
Nice video! Goes to show that every piece of equipment is different and the challenges in this field of trying to know all the different types of refrigerants and all the metering and measuring devices that are coming out and knowing the limits of all them. Thanks for sharing, many old and new techs have learned a lot from your videos.
I enjoy your videos man. I have had nothing but problems with the electronic expansion valves after short time failing. These valves are not cheep either.
Great vid. I'm attending IoT for their HVAC program and your videos have been incredibly helpful.
It's so cool watching you when you do new replacement installations. Great job man. Shit happens sometimes.
Fish tape to get that lineset in tight areas. Also helps to add a slight glass before the evap so in future service you walk in and can see if you got a flash not. Would've been great to see the lineset ran so we can see the frustration of yelling and and trying the get the lineset in the right place.
Had 1 course HVAC back in 1987 at a trade school we run are vacuum pumps over night and at job site too.
We've all made that mistake I'm sure. I put a control board on a Blodgett conveyor oven without reading the install instructions. I hooked it up and sparks flew. I looked at the paper and it said, "If the old board has a transformer on it install this included jumper." Cost me $365. The expensive lessons are the best.
Good Judgement comes from Experience. Experience comes from Poor Judgement.
Excellent video. You always keep me on my toes
I've replaced about 4 or 5 transducers on the beacon 2. They go bad at an alarming rate. I carry 2 on my truck.
Way late to the party on this video (I've been binge watching your older videos) but I just wanted to throw it out there that I really enjoy watching your videos. You have a really methodical and through way of going about your work and I appreciate your honesty in showing us when mistakes happen. Mistakes happen, there's no way around that but it's how you own up to them that can really set you apart from the others. Keep up the great videos and thank you for the quality content!
I will talk about this on the Livestream this evening 6/15/20 @ 5:PM (pacific) come check it out ruclips.net/video/49GnnChaC6g/видео.html
It sucks making mistakes but we are only human. I think its important to man up and admit the mistake if you think you made one. I have been working in a place were very few people admit they did wrong. It sucks having to search through hrs of camera footage to see who drove through a dock door or ran a forklift into a guardrail. Keep up the good work guy and learn from it like you said.
@19 minutes I LOLed when you brought up 3/4 vs 80%
Great video and really good installation.
Sometimes we have to learn on the hard way but the good thing that on this trade we learning every single day even weekend.
Thanks chris for your time to share your videos that are very helpful.
👍.
thank you for your videos, and thank you for taking the time to teach a lot of new guys in our trade that things not always goes as plan but always man up to your mistakes and learn from it
It’s almost as if the 25psi over the pressure test limit you tested to is exactly how far out of spec the transducer was. I’ve had a similar experience and I think similar to analog gauges they should have a adjustment spring to zero them when they blow out of spec.
You and your team did good. Thanks for the video.
2nd year apprentice in refrigeration still doing A/C installd. Learning my trade off you. Lol
Pressure transducers are screwy to deal with.... I've spoiled a couple of 'em over my career in the oil/gas/power gen business. It happens. I learned that I always must read the vendor information! Looks like a good solid installation! Retrofits are unique challenges for sure.
Great vid Chris ...We all had to eat our mistakes at 1 time or another ... But it all works out ...
I love that bender kit. I made a duplicate reversing bracket kit after I bought the first one so I keep them with both my benders.
like the tool to bent lager size soft tubing
Beauty work, really professional install and great lessons to learn. Keep it up man, love your videos.
"Mistakes are bound to happen even when you know all ins and outs of what you are doing". Thats what my father say to me a long time ago. I dont know about this stuff but i know abut pc's. And even with 10 plus years in my carrer i make mistakes. Thats granted every single time you do something. Maybe your lucky and dont make one, but the rule is anything and everything its bound to mistakes.
Really nice video!! For the technician just starting out and the oldtimer who's been around along time the programming of the board was Great. Anyone that is in the refrigeration industry and that does this work will agree it was a nice video showing a retrofit of a WIC. Having done retrofit and remodel work in the Refrigeration industry you have really done a Great job highlighting all the items encountered during a retrofit. For the new technician out there wanting to understand the industry I would suggest watching this video and look at it several times because the experience tech should be able to identify things brought up that are normal during a retrofit they never go perfect but our job is to do the best we can based on the conditions of the building. I also don't care for the sight Glass on those either.
I definitely love my yj tubing bender. Once you get comfortable with it one can make nice clean bends. I couldn't justify the price for the reverse ratcheting part. We all make mistakes. Could you have removed the transducer before the pressure test and replace it prior to the vacuum? I have definitely learned a lot from you and others on RUclips. I really appreciate the content.
Awesome video ! I definitely keep in my mind about transducer pressure whenever I replace the condenser and evaporator, do not over exceeded 150 psi with nitrogen. Man it’s great educational video. Thank you for sharing with us, sir 👍
Bud, you are unique. Keep it up
Chris do you have to power the Txv when pulling a vacuum? I remember the older txv we used a solenoid magnet.
If there’s no power you can unplug the coil on those eevs and turn the coil clockwise 1 or 2 turns to open the valve a little so you can flow nitrogen herb brazing.
Great Job Chris. Watching your videos makes me miss doing Refrigeration work. Used to do it with my dad back in the day. Anyway keep kicking ass brother. 💪🏻🤟🏻
Where did you get the trueblu 1/4 inch 90 fitting? I went on true tech tools website and saw a 1/4 inch 90 but it’s not the same as that one? Would definitely help on the job. There are a couple of instances where I can’t use the hose without it.
thanks chris ---always enjoy this videos --------
Those logic boards look so cool covered in that shrink plastic
Heatcraft outdoor labels from a couple years ago fades.. I use a Sharpie to show new install #s.. Ambient, Gas Type, amount, compressor amps, condenser amps, voltages.. I write it on the inside wall by compressor
The Install looked sweet, Great Video, just joined the Channel.
Amazing Work Chris, pleasure to watch 👏🏻👏🏻👏🏻
I have been installing those heat craft evaps for some time now. Have you had a new install with a scroll compressor and electronic expansion valve give you a high superheat fault. If so. Take out the compressor time delay that is factory installed. Heat craft tech support knows of this issue. Great job on that install. I wish I could have a tech like you here in Detroit.
I've always been taught that you shouldn't pull a vacuum on a pressure transducer. But I typically see them mounted on a king valve that can be shut off during evacuation. Might be worth it to remove the transducer during evacuation and reinstall it when you have positive pressure. This is the rule we abide by when evacuating.
You do good work. I've always gone heavy on the braze. Easy insurance
Thank you for the videos, excellent information, keep up the good work
nice ... I work on QRCs . that E-6 drove me crazy at first
I've always enjoyed these.
Thanks
I notice your checking esp of 77 which is expansion valve steps, not evaporator suction pressure(SCP).
Those Carel transducers are a pain, when there go out of range there can cause some major flood back and some times those stepper valves can stay stuck open. I work on them on a daily basis.
pleasure to watch your videos,you know what your doing....! mike kc2igr
Don't worry we're all human and humans are fallible but when you figure it out and solve the solution very quickly like you did that was the only way you could come about and find something that you didn't watch. I like your videos you help me
I just did a roof mounted semi hermetic coplematic compressor swap and change over to r448a. So far so good. If youd like I can give you more details. Another great video as always.
Sounds cool send me an email and tell me more.... hvacrvideos@gmail.com
@@HVACRVIDEOS I just sent you an email with some detail. I can get further into it too if youd like. I hope I wasnt too vague...
What’s the purpose of the p trap in the line set
@@jack78946 it's actually to increase the velocity of the gas. You have to put one every so many feet of you have long line sets. I don't remember the exact amount
I wonder what your experience is with the nitrogen pressure test as a tightness test.
I'm not talking about this particular video, but in general.
Testing with max. operating pressure nitrogen proves structural integrity of the system and in this area I have no doubts.
As far as tightness is concerned, based on some calculations, it should be much better to test for simple leaks (leaks which are not dependent on pressure being particularly high/low) with micron gauge after system evacuation.
E.g. you had 175 psi pressure and 0,4 psi drop. Arithmetically it means that you lost 1/440 of pumped-in gas. Assuming 15 liter volume, it is 0,4 liter lost out of 180 liter delivered. Test result was "pass" but actually the possibility of a leak was not excluded.
I would accept without hesitation statement of a kind "the system has no leaks which was proven by bubble-test/detector test". Second best would be "the system has no leaks which was proven by stable vacuum reading of 500 micron in 20 minutes". I really find it hard to accept "the system has no leaks which was proven by pressure drop from 175 to 174,6 psi in 20 minutes".
Where do you get those ratcheting wrenches you use on the valves?
got a call about a similar heatcraft setup. It's a freezer with 404a. Pressures read good, board setup the right way. Fans are running but box goes up to 30 degrees. Called tech support and 2 reps told me to jump out a time delay on the condensing unit. Scratching my head because when we did a PM there earlier we noticed the evap coil's upper coil iced up and suction line super iced up. Went today and started unit up at 60 degrees and it dropped down to -1. Still not sure why this is happening. Any help or ideas are appreciated.
Is it "OK" to use a white conductor for one leg of the 3 phase power? (at 14:00 the wires going to the compressor are black, blue, and white) I would have thought white was to be reserved for neutral.
a pressure transducer uses the flexing of a diaphragm to measure pressure, my guess is it is possible to overextend and permanently deflect the diagram to the point where it always reads high. Just a guess though.
that sounds logical !! I was thinking the very same.
Nice video,
Maybe wasn't the pressure but when you brazed on the piping.
Just a thought.
What if you couldn’t get that transducer and it was a few days out? The controller can’t operate the EEV and maintain superheat without it right? Pump it down install LLS, TXV, KE2 temporarily?
sure if you had to to keep location running, (warm beer bad for business)
Great product and excellent video 👍👍👍 lesson learned.
Chris when you are going through the Beacon 2 diagnostics and you come across ESP = 77, that is not the evaporator pressure. That is the amount of steps your EEV is open between 0-250. Your evap pressure is SCP on the board. Did you get a call back, and did replacing the transducer fix your low superheat error/alarm?
Awesome, I enjoy your work man!
You would think with all the advances in electronics, they would be able to have a scrolling readable screen without having to revert to a legend to try interpret the displays….
more advanced screens don't like low temperatures. those 7seg displays have no issues with cold freezers (and manufactures don't want different parts for freezers or refrigerators)
@@drisbain However, they could use slightly smaller displays and use more of them, and get two rows of 8 characters.
Mistakes are the best teachers!
do you have certs on Bluon? (R-458A) was curious if it is as good as they say it is.
I've only installed three of the QRCs. I have only had one issue, which was a sensor failure,with the spare in the unit. It is interesting that they use the same color sensors as the Inteletraul controllers. I didn't know that about the pressure transducer. I don't know if anyone else does it, but I started putting my filter/drier at the evap.
Was that the first coil you replaced that had a pressure transducer ? I am sure you nitrogen pressure test all replacements but do you usually test with lower pressures. Does Heatcraft transducers have a lower maximum pressure rating than other manufacturers?
Good find,and admitting always pays to read.On ya Chris.
Great job again like always
You are great brother.
Great video. I wouldn't be surprised if heatcraft warranties that transducer... I service a bunch of those, temperature probes and transducers always fail.
I'm not knocking heatcraft I like the product. There is worse out there for sure... also adding a little thermal grease to suction probe and a zip tie will be a blessing trust me😂
18:20 It's rather telling of the overall quality when the [black canister with the drier attached to it] has pipe surface corrosion due to the manufacturer using acid flux and not bothering to clean it off afterwords.... But you said it's some Chinese jobbie, and that pretty much tells all. You can probably read that sight glass better with some help from your brazing inspection mirror though.
when you were pulling a vacum after u brazed everything and did ur pressure test , did you have the evaporator on ? did you have to put it in test mode or off thank you
I had the evap on in normal refrigeration mode so the tev was open
Hi there from Holland. Great video, have a question: with the pumpdown when the compressor was still working, could you write what was connected wrongly so it didnt stop.
The input power wires and the wires to the compressor were connected to the same side of the contactor, which means that it does not matter what state the contactor is in, the compressor will always have power and so will not stop when the contactor is de-energized.
You do good work . Darek from KKT Chillers USA
Thanks bud!
Hey brother the transducer is covered under heat craft warranty we replace them weekly almost should be able to do an over the counter swap at baker or y’alls local heat craft distributor
Is there a setting on the beacon controller for evactuation? I know most systems with EEVs need to be set to evac mode to drive the valve open. With most VRV/VRF you need to make sure you don't power up your units pre-vaccum since the valves are shipped open and once they get power they drive fully closed as they should be when the system is not operating.