I love how with the camera frame rate you can see those 2 evap fan motors slow down & speed up slightly. Excellent diagnosis, added the relay, put in proper pressure controls. Installed in such a way that it's better for the next guy. A+
I love your commentary and theories on pressure switches/controls in the HVAC equipment. Disclaimer - this is my opinion as well, I'm an Electical/Controls Engineer who has worked with HVAC stuff for so long I also design the refrigeration parts now as well. I watch these videos because 1. I love the "big picture" and doing things properly attitude. 2. I design the stuff, why not watch how people install, service, and use the equipment 3. I can do a better job to make your lives easier. Why do the small ones (switches) last longer on 24VAC/VDC vs 115/208/277VAC switching? Why do the big PENN and RANCO ones last considerably longer only when they have 'enough' load on them? Coils. Contactor Coils. They all have inrush, and they all have a bit of "snap back" when the power to them is opened. The 24VAC ones tend to have a smaller inrush, higher holding current (has to for the same VA), and very little kickback when the circuit opens. That's great for the "wimpy" contacts in a Klixon like pressure switch. Your big switches need a bit more load/current/abuse to keep their contacts clean. The small arcs on every open/close even wipe the contacts clean when everything is sized properly, and if its too high a current, you burn up the contacts. Conversely, if you have too little load, the big contacts will slowly oxidize and make a bad connection. It's a simple concept when you step back and think about it, yet, it's missed by many. If you ever want to see it in action, you'll need an oscilloscope, current probe, and voltage probes on each side of each device to watch the circuit in action. The equipment I design almost never needs new pressure switches, even after 10+ years of service. Why? I don't use DP contactors. I only use IEC contactors with the varistor pack on them to limit inductive kickbacks. They are much easier on the switches. Unfortunately, they aren't common in HVAC. I noticed most equipment and most HVAC supply houses carry only the DP contactors that cost nearly nothing. A 40A 3 pole contactor for under 40 bucks? Crazy!
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
I agree with everything you say. What this is at its most basic is cost shifting from the factory to the field. You didn't mention that these same Klixon/Sensata switches formerly were a Schrader valve depressor and fit onto a service port; changing one out took 10 minutes with no need to remove the refrigerant. But the new direct-braze versions cost less for the factory, saving the manufacturer at most a dollar or three per A/C unit, but greatly boosting the repair cost and effort. Running full line starting current through these is just plain stupid engineering. Sensata offers heavy duty versions of their pressure switches that have silver-tungsten contracts, but if you check the P/N on a failing part - I'll bet you any money, it will be the standard duty part; just enough robustness to survive the warranty with little life to spare.
Working as an IT Consultant and parttime electrician i find your videos really fascinating... I like your methodical approach to solving issues and your work ethic is great... one thing that really bothers me is the electronics ratsnest we get to see every time a box is opened... We wouldn't get away with this over here in Europe (Netherlands, to be precise), although i've never opened a roofunit for an large AC or refridgeration installation, i'm quite sure they're a lot neater and therefore safer... (any western european HVACR Engineers here to confirm/deny this?) Keep up the great work!
If the oil loss was accumulated in the tray, then I would take a absorbent pad, weigh it on the scales, note it as the tare, then sop up the mess, then weigh the pad again. Then calculate that minus the the tare. And go from there.
Having watched all your videos, Chris, this one is exemplary! Instead of just repairing what failed, you did things which will extend the useful life of the equipment. Your repairs gave it more reliability and serviceability that the manufacturer originally provided. If only the restaurant owners understood the real value you're delivering!
All the high efficiency equipment our trade makes is junk. Does is save energy - Yes, does that mean customer is saving money - No. Up front equipment costs more, we benefit. It breaks a lot, we benefit, once its out of warranty we benefit even more. How did it ever benefit our customers?
Excellent question Glen! As a small business owner myself, one thing I learned early on is this, "if you don't serve the customer, someone else will ". I can't number the customers I have taken from other businesses because I provided a higher quality product ( not Necessarily cheaper), and better service. In the operation of my own business, I look for quality first, price second, for the exact reasons you called out. MANY KUDOS TO YOU, GLEN! ! !
The manufacturers are in a race to the bottom on quality, which I'm sure you know, must be engineered into a product from the beginning. The engineers of this condensing unit only focused on making it meet specific performance and efficiency standards when new, at the lowest possible manufacturing cost. Engineers with knowledge and experience in plain-old mechanical reliability and serviceability were obviously not involved. Delivering a higher-quality product doesn't benefit the manufacturer's bottom line, and they get away with making what you accurately call "junk". (how and why they get away with it, well that's a whole 'nother story)
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
I have changed so many of those fan motors. I've called Kolpak so many times for warranty replacement they finally just sent me extra motors for my van. Lots of issues with those motors and also with the compressor time delay. Sometimes you just have to be an engineer and make some design decisions to give your customers reliability and sacrifice a little energy efficiency.
I think it's awesome that you and other tradespeople on here share your knowledge with people who are just starting out and even old pro's in the trades ... Thx for sharing 👍👍👍...
QUESTION❓when you come across a “factory flaw” like this, do you ever take a photo of said flaw and send it to the manufacturer to show them how their product is holding up in the field. I would think they would appreciate the feedback on their products.
As always great video Chris, yes I believe the overamping issues caused by lack of PM is definitely the culprit as well. Once again I have learned so much.
THIS is excellent advice. I often wonder if people just don't understand work-hardening of metals, or are just to lazy or are they worried about cost to do the job correctly.
8:02 - I'd be a bit wary about keeping the old pipe that did crack since that seems to me to be a metal fatigue issue and those are just propagating down the line so to say. Resonance causing metal fatigue is a beast of its own. I understand the idea behind the shortcut though, it saves some headache and maybe it will work. Good that you strapped it down though, so maybe you are safe. 15:55 - under the connector where the oil was filled on the suction line there's something glittering. Maybe just old oil or loose insulation though.
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
I'd rather two-speed old school style. Twin windings. So much less that can go wrong in them, as there's no electronic control board to kill with condensation. I find it hilarious when they have this emphasis on "energy savings" in the fan motors, when the fan motors are a fraction of the energy spent on the actual box running under power. Additionally when all these fancy electronic computer systems are constantly failing, but an older design exists that would do the job far more reliably. Multi-speed non-ECM motors have existed for a very long time, and I own several pieces of equipment with them. But manufacturers want to put electronic controls in everything these days... I love electronics as much as anybody else, and in fact my day job is to build and fix them. But they have their place, and more importantly, there are places they don't belong. The old way isn't automatically bad because it's old. Yes, the newer way is sometimes better, but sometimes the old way is better, and throwing away perfectly good electromechanical systems that've been reliable for 35 years to put in an electronic control that'll die in 6 months ... that's not progress, that's marketing.
I’ve had a ton of those fail under warranty. They changed motor last year I think. I do a lot of kolpak warranty work if they prop the door or get much moisture in the box they go even faster.
Fun Unrelated Work Story: I was stuck in the store after hours by myself. Years ago, our two restrooms were converted to storage rooms because the wetlands behind the store expanded concerningly-close to our septic tank/leaching field, and our well is near the wetlands as well. (Major developer in town greased some palms back in the 80s to get approval to build a strip mall bordering a swampy area.) The fixtures (toilets, sinks, TP & soap dispensers, etc) are off the walls, but the electric hand dryers still exist. So yeah, the store was pretty quiet, just the normal whirr of various equipment. Suddenly, one of the hand dryers begins running. It's one of the hands-free models. And no, we do not have a vermin problem - we get a gnat infestation every spring due to nearby farmland, but we never have vermin, and our pest control company is always surprised that there is never evidence of mice - well, they're all down at the Chinese food place and the pizza place, as long as they stay at that end of the strip it's not my problem. So, I start thinking that, along with every other piece of broken equipment we have, it's an intermittent problem that nobody noticed or bothered to tell anyone about. "No problem," I think, feeling a bit smarter-than-the-average-bear, and I head to the breaker panels. Both panels have nicely-handwritten labels, and I'm searching like crazy for a breaker labeled "Hand Dryers." It's gotta be a double-pole 240V breaker, right? Well, all of the 240V breakers are labeled for the equipment, none for the hand dryers. I actually said aloud, "Oh no, they can't be using 110V hand dryers, what were they thinking?" I begin my search again. The only thing I can find are two 110V breakers labeled "Rest Room" and "Rest Room." The hand dryer pops on, and I flip the first "Rest Room" breaker I choose, which happens to be the right one. Except... The breaker that operates the hand dryer also operates an unused GFCI receptacle, the infrared-operated ceiling light, AND the emergency light power (the only one in our unit that actually works, since all the others have long-dead batteries). Shaking my head, I flip the breaker back on, and went home.
I have been watching this gentleman’s work for a long time from over the pond in AU. I’m amazed at the equipment in the USA, it all seems so “flimsy” to me. I have a shop with a 50year old cool room running OEM equipment. I used to be a refrigeration controls engineer and we only ever used Carel / Emerson controls. With our evap fans all our motors are PWM motors so only one winding with electronic speed control. The thermostats we use drive evap fan speed, e-Txv, condenser fan speed and also variable speed compressor (optional) or fixed speed. The CellarMate controllers are around 500AUD but will even make a old system energy efficient. Are customers really penny pinching?
Excellent workmanship! I would advice to put a brace on the F/D to keep it from rubbing against the CDU base and relieve the stress and vibration on the LL.
75% of small evaporator fan issues is water in the harness. Cut the 3rd prong for the lo & hi usually a flat on the fan connector and good to go. If you still have the issue replace the fan wire harness.
The two fans seemed to be surging in the video. They would run for an instant then spin down a little over and over. At a guess they might have had an internal overload/thermal cutoff that was going off.
Good video. Is all the equipment under warranty? How frustrating is a manufactures error (not supporting the drier properly) and they don’t cover time and sundries like driers gas etc
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
"So the MG44".. Me suddenly confused and looking at screen with the question, why i am now listening to a german assault rifle.. Boy, i wonder if anyone (inc fieldpiece) even checks there naming convention against existing things.
It's not just refrigerant. I don't think there's any industry that checks their conventions against anything else. The folks here say things like "MUA". Well, for longer than there have been air conditioners, that's been a "Make Up Artist" in the theatre world.
I know you did not like the wiring on this unit but it is amazing how much worse it can be. It is like, if I cannot redo this mess, I cannot go any further. I may be a little OCD with some of this shit.
Awesome video chris, is it possible to draw out the high and low pressure switch what you add to the system and what pressures do you set it too. im confused on this part and would like to understand this more. thanks
having a ring on when working with electrical is a bit of a hazard, you could loose a finger if it touches anything, i'd recommend putting it on a chain/necklace underneath your shirt
Hi Chris, I recently found your channel and have been enjoying your videos, I work in a clean room and I’m curious if you’ve ever worked on a clean room laminar ventilation system! I’m very curious to see what they look like inside, especially recently in the PNW we have major forest fires and our fab was close to the forest fires and ash rained from the sky, wild enough they did not shut down the fab. Thanks for the videos!
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
@@stoves92 I very much doubt that, not possible to be in this trade and also illegal I'm sure since you then can't differente between the colors of power cables.
I know you don't do window AC but I bought one last summer I noticed what the hell is r32 it says refrigerant r32 it really does never seen that before
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
@@HVACRVIDEOS thanks Chris so a fully charged system for you is a full sight glass when the box is close to temp and then adjusting the txv to hone it in if a new system I guess
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
Fieldpiece makes good micron gauges. Looks like they got rid of that cheap ass connector looks like they went with brass on the newer one 👍 my only gripe with their older micron gauge
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
So the two left motors went full left shark. Cool, cool. So, correct me if I'm wrong, but doesn't a motor that's OFF or unpowered draw less power than a motor that's spinning 24x7 on low speed? Seems like #EnergyInsanity to me.
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
Fan motors and heaters draw more amps on initial start up. But shutting it off or running in a low speed I’m sure are the same energy consumption. If you break it down. Engineers and customers want what saves money. I’m sure to someone that doesn’t really understand it’s easy to sell the equipment. I work on Walmarts and sams clubs,And let’s say you can save 15 grand a year if they initially spend it up front. Or over the year it uses 20 grand in consumption they would choose the 20 grand route because it’s broken down and it’s not All up front. That’s why Walmarts rejects the PM’s. They don’t want to spend the money up front but rather break it down. It makes literally zero sense.
i hate that you use the Discharge line for Fan Cycles or HP ... you should always use the liquid line from the reciever to the TXV why? so if anything happens just close the reciever and go to town
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
I suppose thats possible. But I can’t imagine it would require that much more of a vacuum. With that logic, the remaining oil in the system is exposed too.
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
Chris do you ever get tired of the hindsight Howard’s ?? You know the clowns who tell you how they would have done it . After they have analyzed your video for hours
![ละลาย (LALALYE) - DAOU PITTAYA ต้าห์อู๋ พิทยา [OFFICIAL MV]](http://i.ytimg.com/vi/wo6r9TgausI/mqdefault.jpg)
I love how with the camera frame rate you can see those 2 evap fan motors slow down & speed up slightly.
Excellent diagnosis, added the relay, put in proper pressure controls. Installed in such a way that it's better for the next guy.
A+
I love the fact that I am watching Chris fixing a walk in freezer and randomly outside started snowing!😂😂
I love your commentary and theories on pressure switches/controls in the HVAC equipment.
Disclaimer - this is my opinion as well, I'm an Electical/Controls Engineer who has worked with HVAC stuff for so long I also design the refrigeration parts now as well.
I watch these videos because 1. I love the "big picture" and doing things properly attitude. 2. I design the stuff, why not watch how people install, service, and use the equipment 3. I can do a better job to make your lives easier.
Why do the small ones (switches) last longer on 24VAC/VDC vs 115/208/277VAC switching?
Why do the big PENN and RANCO ones last considerably longer only when they have 'enough' load on them?
Coils. Contactor Coils. They all have inrush, and they all have a bit of "snap back" when the power to them is opened.
The 24VAC ones tend to have a smaller inrush, higher holding current (has to for the same VA), and very little kickback when the circuit opens. That's great for the "wimpy" contacts in a Klixon like pressure switch. Your big switches need a bit more load/current/abuse to keep their contacts clean. The small arcs on every open/close even wipe the contacts clean when everything is sized properly, and if its too high a current, you burn up the contacts. Conversely, if you have too little load, the big contacts will slowly oxidize and make a bad connection. It's a simple concept when you step back and think about it, yet, it's missed by many.
If you ever want to see it in action, you'll need an oscilloscope, current probe, and voltage probes on each side of each device to watch the circuit in action.
The equipment I design almost never needs new pressure switches, even after 10+ years of service. Why? I don't use DP contactors. I only use IEC contactors with the varistor pack on them to limit inductive kickbacks. They are much easier on the switches. Unfortunately, they aren't common in HVAC. I noticed most equipment and most HVAC supply houses carry only the DP contactors that cost nearly nothing. A 40A 3 pole contactor for under 40 bucks? Crazy!
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
I agree with everything you say. What this is at its most basic is cost shifting from the factory to the field.
You didn't mention that these same Klixon/Sensata switches formerly were a Schrader valve depressor and fit onto a service port; changing one out took 10 minutes with no need to remove the refrigerant. But the new direct-braze versions cost less for the factory, saving the manufacturer at most a dollar or three per A/C unit, but greatly boosting the repair cost and effort.
Running full line starting current through these is just plain stupid engineering. Sensata offers heavy duty versions of their pressure switches that have silver-tungsten contracts, but if you check the P/N on a failing part - I'll bet you any money, it will be the standard duty part; just enough robustness to survive the warranty with little life to spare.
Working as an IT Consultant and parttime electrician i find your videos really fascinating... I like your methodical approach to solving issues and your work ethic is great... one thing that really bothers me is the electronics ratsnest we get to see every time a box is opened... We wouldn't get away with this over here in Europe (Netherlands, to be precise), although i've never opened a roofunit for an large AC or refridgeration installation, i'm quite sure they're a lot neater and therefore safer... (any western european HVACR Engineers here to confirm/deny this?)
Keep up the great work!
If the oil loss was accumulated in the tray, then I would take a absorbent pad, weigh it on the scales, note it as the tare, then sop up the mess, then weigh the pad again. Then calculate that minus the the tare. And go from there.
Lol, that’s smart but very unnecessary.
One thing I’ve learned by watching your vids is that in hvac you never stop at the first problem you keep going.
Having watched all your videos, Chris, this one is exemplary!
Instead of just repairing what failed, you did things which will extend the useful life of the equipment. Your repairs gave it more reliability and serviceability that the manufacturer originally provided. If only the restaurant owners understood the real value you're delivering!
All the high efficiency equipment our trade makes is junk. Does is save energy - Yes, does that mean customer is saving money - No. Up front equipment costs more, we benefit. It breaks a lot, we benefit, once its out of warranty we benefit even more. How did it ever benefit our customers?
Excellent question Glen!
As a small business owner myself, one thing I learned early on is this, "if you don't serve the customer, someone else will ". I can't number the customers I have taken from other businesses because I provided a higher quality product ( not Necessarily cheaper), and better service.
In the operation of my own business, I look for quality first, price second, for the exact reasons you called out.
MANY KUDOS TO YOU, GLEN! ! !
The manufacturers are in a race to the bottom on quality, which I'm sure you know, must be engineered into a product from the beginning. The engineers of this condensing unit only focused on making it meet specific performance and efficiency standards when new, at the lowest possible manufacturing cost. Engineers with knowledge and experience in plain-old mechanical reliability and serviceability were obviously not involved. Delivering a higher-quality product doesn't benefit the manufacturer's bottom line, and they get away with making what you accurately call "junk".
(how and why they get away with it, well that's a whole 'nother story)
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
I noticed the 3 fan motors are fluctuating in speed via the strobe effect of video. It is very subtle.
Its just the camera angle of the shutter speed of the camera.
8:15 why a couple ugga duggas and 2 clicks? i always learned to just tighten until it snaps off and than back off a quarter turn. perfect every time.
Ha ha yeah your way works too
No you snap it off, weld it back on and back off a quarter turn :D
@@EDHKilian weld? nobody got time for that. just dab some CA on it and call it a day
I have changed so many of those fan motors. I've called Kolpak so many times for warranty replacement they finally just sent me extra motors for my van. Lots of issues with those motors and also with the compressor time delay. Sometimes you just have to be an engineer and make some design decisions to give your customers reliability and sacrifice a little energy efficiency.
I think it's awesome that you and other tradespeople on here share your knowledge with people who are just starting out and even old pro's in the trades ... Thx for sharing 👍👍👍...
I love how the fans literally randomly switch to low speed as you were talking about eliminating the low speed thing
Revisited this again to help train my apprentices. Awesome as always, Cris.
QUESTION❓when you come across a “factory flaw” like this, do you ever take a photo of said flaw and send it to the manufacturer to show them how their product is holding up in the field. I would think they would appreciate the feedback on their products.
Most videos: tiny, almost undetectable leak | This video: a l l g a s g o n e
As always great video Chris, yes I believe the overamping issues caused by lack of PM is definitely the culprit as well. Once again I have learned so much.
Great video, I normally put two loops on the discharge line between compressor and condenser to avoid cracking works a treat.
THIS is excellent advice. I often wonder if people just don't understand work-hardening of metals, or are just to lazy or are they worried about cost to do the job correctly.
8:02 - I'd be a bit wary about keeping the old pipe that did crack since that seems to me to be a metal fatigue issue and those are just propagating down the line so to say. Resonance causing metal fatigue is a beast of its own. I understand the idea behind the shortcut though, it saves some headache and maybe it will work. Good that you strapped it down though, so maybe you are safe.
15:55 - under the connector where the oil was filled on the suction line there's something glittering. Maybe just old oil or loose insulation though.
The heat from brazing will anneal the old copper so it should be ok, same as when you heat hard drawn copper before swaging etc.
How good is energy saving units when they break more often than not
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
JUNK
I'd rather two-speed old school style. Twin windings. So much less that can go wrong in them, as there's no electronic control board to kill with condensation.
I find it hilarious when they have this emphasis on "energy savings" in the fan motors, when the fan motors are a fraction of the energy spent on the actual box running under power.
Additionally when all these fancy electronic computer systems are constantly failing, but an older design exists that would do the job far more reliably.
Multi-speed non-ECM motors have existed for a very long time, and I own several pieces of equipment with them. But manufacturers want to put electronic controls in everything these days...
I love electronics as much as anybody else, and in fact my day job is to build and fix them. But they have their place, and more importantly, there are places they don't belong.
The old way isn't automatically bad because it's old. Yes, the newer way is sometimes better, but sometimes the old way is better, and throwing away perfectly good electromechanical systems that've been reliable for 35 years to put in an electronic control that'll die in 6 months ... that's not progress, that's marketing.
I’ve had a ton of those fail under warranty. They changed motor last year I think. I do a lot of kolpak warranty work if they prop the door or get much moisture in the box they go even faster.
Fun Unrelated Work Story: I was stuck in the store after hours by myself. Years ago, our two restrooms were converted to storage rooms because the wetlands behind the store expanded concerningly-close to our septic tank/leaching field, and our well is near the wetlands as well. (Major developer in town greased some palms back in the 80s to get approval to build a strip mall bordering a swampy area.) The fixtures (toilets, sinks, TP & soap dispensers, etc) are off the walls, but the electric hand dryers still exist.
So yeah, the store was pretty quiet, just the normal whirr of various equipment. Suddenly, one of the hand dryers begins running. It's one of the hands-free models. And no, we do not have a vermin problem - we get a gnat infestation every spring due to nearby farmland, but we never have vermin, and our pest control company is always surprised that there is never evidence of mice - well, they're all down at the Chinese food place and the pizza place, as long as they stay at that end of the strip it's not my problem. So, I start thinking that, along with every other piece of broken equipment we have, it's an intermittent problem that nobody noticed or bothered to tell anyone about.
"No problem," I think, feeling a bit smarter-than-the-average-bear, and I head to the breaker panels. Both panels have nicely-handwritten labels, and I'm searching like crazy for a breaker labeled "Hand Dryers." It's gotta be a double-pole 240V breaker, right? Well, all of the 240V breakers are labeled for the equipment, none for the hand dryers. I actually said aloud, "Oh no, they can't be using 110V hand dryers, what were they thinking?" I begin my search again. The only thing I can find are two 110V breakers labeled "Rest Room" and "Rest Room." The hand dryer pops on, and I flip the first "Rest Room" breaker I choose, which happens to be the right one. Except... The breaker that operates the hand dryer also operates an unused GFCI receptacle, the infrared-operated ceiling light, AND the emergency light power (the only one in our unit that actually works, since all the others have long-dead batteries). Shaking my head, I flip the breaker back on, and went home.
I have been watching this gentleman’s work for a long time from over the pond in AU.
I’m amazed at the equipment in the USA, it all seems so “flimsy” to me. I have a shop with a 50year old cool room running OEM equipment.
I used to be a refrigeration controls engineer and we only ever used Carel / Emerson controls. With our evap fans all our motors are PWM motors so only one winding with electronic speed control. The thermostats we use drive evap fan speed, e-Txv, condenser fan speed and also variable speed compressor (optional) or fixed speed. The CellarMate controllers are around 500AUD but will even make a old system energy efficient. Are customers really penny pinching?
Great info. Thanks Chris.
Great job Chris you the man
Good stuff.. as always very informative. Stay safe and be well!
Dude!!!! You are the refrigeration ninja!!!!
Thanks for sharing the video !
Excellent workmanship! I would advice to put a brace on the F/D to keep it from rubbing against the CDU base and relieve the stress and vibration on the LL.
For some reason, I've never seen you adding oil, to anything before. I've never seen that oil pump.
If I had a nickle every time a cooler/freezer or case went into defrost after I fixed it. I would have a huge jar of nickles.
Hahaha when I first got started that happened, took me longer than I'd like to admit for me to realize 😅
Good job Chris.
75% of small evaporator fan issues is water in the harness. Cut the 3rd prong for the lo & hi usually a flat on the fan connector and good to go. If you still have the issue replace the fan wire harness.
As always, thanks Chris.
The two fans seemed to be surging in the video. They would run for an instant then spin down a little over and over.
At a guess they might have had an internal overload/thermal cutoff that was going off.
I noticed that myself.
It’s hard to judge how a fan is running on video, the frame rate makes them always look wonky even if they’re working right
I think it was the camera shutter. I saw that myself as well
Definitely a flaw, I've had the same leaks on those RDI systems
OMG! THAT UNIT SHOULD NEVER HAVE THAT MUCH SHAKE ON STARTUP
Thank you for showing us all these informational videos they are awesome
well the tempature control said "blank during defrost cycle".
Great video
“I’m gonna be an engineer “ 👷♀️
Good video. Is all the equipment under warranty? How frustrating is a manufactures error (not supporting the drier properly) and they don’t cover time and sundries like driers gas etc
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
You should really do a failure analysis of those two speed motors, take them apart and test the circuits, and figure out their electrical logic.
I would but they wanted them back for warranty reimbursement.....
"So the MG44".. Me suddenly confused and looking at screen with the question, why i am now listening to a german assault rifle..
Boy, i wonder if anyone (inc fieldpiece) even checks there naming convention against existing things.
It's not just refrigerant. I don't think there's any industry that checks their conventions against anything else. The folks here say things like "MUA". Well, for longer than there have been air conditioners, that's been a "Make Up Artist" in the theatre world.
ChrisFix but for HVAC
I know you did not like the wiring on this unit but it is amazing how much worse it can be. It is like, if I cannot redo this mess, I cannot go any further. I may be a little OCD with some of this shit.
where the fan cycle switch's sensor goes into the liquid line, do those copper Tee's have a flare nut connection where the sensing line connects?
Another great video Chris. 📹. Enjoy the AHRI convention. Throw a bet down for me on 00 on the roulette table....im good for it. Hahahahahaha
Awesome video chris, is it possible to draw out the high and low pressure switch what you add to the system and what pressures do you set it too. im confused on this part and would like to understand this more. thanks
having a ring on when working with electrical is a bit of a hazard, you could loose a finger if it touches anything, i'd recommend putting it on a chain/necklace underneath your shirt
It's a silicone ring for that exact reason, the silicone rings will break away and are non conductive
@@HVACRVIDEOS Ah! I cant tell on video, it appears as a gunmetal finish on this end. Good deal then
You tried 🎉🎉🎉 😂
Hi Chris, I recently found your channel and have been enjoying your videos, I work in a clean room and I’m curious if you’ve ever worked on a clean room laminar ventilation system! I’m very curious to see what they look like inside, especially recently in the PNW we have major forest fires and our fab was close to the forest fires and ash rained from the sky, wild enough they did not shut down the fab.
Thanks for the videos!
I had to show my wife the spraying refrigerant.
Ever work on Aaon equipment? Very ubiquitous here in their hometown.
Would it be possible to check the remaining oil level by heating the shell of the compressor slightly then check it with a thermal camera?
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
2:51 look the controller is blank when the defrost began
1:45 Yellow? For me its bright green.
Green also for me^^
He might be color blind. It's green for me too.
@@stoves92 I very much doubt that, not possible to be in this trade and also illegal I'm sure since you then can't differente between the colors of power cables.
I know you don't do window AC but I bought one last summer I noticed what the hell is r32 it says refrigerant r32 it really does never seen that before
R32 replaced r410 a as it has a lower gwp , r410 is being retired for new equipment under a certain kg vrv will still use r410a
R32 is half of what's in R410 anyways, no worries.
@@scoobyru84
4:10 That's a lot of oil!!!!
Would it not be a good idea to secure the dryer to the bottom of the unit ?.
Nice video.
If you had watched the video to the end, you would have known Chris did exactly that.
Hi Chris, Why there is no refrigerant gas is coming out through the oil hose when you are charging oil?
I will discuss this on my livestream this evening 5/2/22 @ 5:PM (pacific) come over and check it out th-cam.com/video/vDvOUUBF-vE/w-d-xo.html
There was no gas left because of that big leak.. that access port he was charging that oil into in RIGHT before the compressor
because it is check valve there it
in the pump.
Really not a fan of the two speed motors. I understand energy efficiency but these things are crap. I wire them straight full speed.
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
Hi Chris do you ever charge to superheat or do you prefer to fill the site glass when the box is close to temp
No in Refrigeration on systems that have receivers you never charge to superheat. Superheat is something you adjust after the system is fully charged
@@HVACRVIDEOS thanks Chris so a fully charged system for you is a full sight glass when the box is close to temp and then adjusting the txv to hone it in if a new system I guess
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
Cheers Chris
Fieldpiece makes good micron gauges. Looks like they got rid of that cheap ass connector looks like they went with brass on the newer one 👍 my only gripe with their older micron gauge
delay on make is safer IMHO . Nahhh Manitowoc knows they have a crap head control on the CVD units
Why you dont chek oil for acid?!
How did you calculate the oil needed?
Did you not watch the video? 🤦🏻♂️
@@cesarmoore7996 Yes I saw it but I did not understand how he calculated the amount of oil he filled.
@@PoliCronis86 go back and watch it again, he literally tells you exactly how
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
I'd like to do some vocalization/dramatization of the titles of these great videos, Chris.
hangers and c ports :))
So the two left motors went full left shark. Cool, cool. So, correct me if I'm wrong, but doesn't a motor that's OFF or unpowered draw less power than a motor that's spinning 24x7 on low speed? Seems like #EnergyInsanity to me.
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
Fan motors and heaters draw more amps on initial start up. But shutting it off or running in a low speed I’m sure are the same energy consumption. If you break it down. Engineers and customers want what saves money. I’m sure to someone that doesn’t really understand it’s easy to sell the equipment. I work on Walmarts and sams clubs,And let’s say you can save 15 grand a year if they initially spend it up front. Or over the year it uses 20 grand in consumption they would choose the 20 grand route because it’s broken down and it’s not All up front. That’s why Walmarts rejects the PM’s. They don’t want to spend the money up front but rather break it down. It makes literally zero sense.
@@jakefurgerson8398 its an accounting thing
i hate that you use the Discharge line for Fan Cycles or HP ... you should always use the liquid line from the reciever to the TXV why? so if anything happens just close the reciever and go to town
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
watched some guy fix a walk in freezer in 4K at 3 in the morning, what am I doing?
smoking and drinking
at 2:45 you seemed so confused lol.
KolPak RDI......WOOHOO........
"This side up" package ...
I made it
I think the pressure controls control the power going to the contactor don't they? The contactor wouldn't use more or less power.
You 👍👍👍
Nice video
👍
👍👍👍
Making all that money today lol.
Remove the cage
Why not put the oil in when the system was flat?
Would the oil absorb crap from the air? And then vacuum draw would be much more difficult, as the air had to be sucked out of the oil?
I suppose thats possible. But I can’t imagine it would require that much more of a vacuum. With that logic, the remaining oil in the system is exposed too.
I will discuss this on my Livestream on TH-cam this evening, 1/24/22 @ 5:PM (pacific) to come over and check it out th-cam.com/video/lbSNs2Wizok/w-d-xo.html
Can you send me a condenser fan moter and ductdetecter
Go sweat on drier and sight. It reduces risk from employee mistakes. #profit
🇺🇸👍💪🐕
731 Thumbs uP
Hvac video utube freezer upright case one door
Chris do you ever get tired of the hindsight Howard’s ?? You know the clowns who tell you how they would have done it . After they have analyzed your video for hours
First
Thanks again for the videos!
🍺🍺🍺🥃🥃🎯🏌🏻♀️
Stay safe.
Retired (werk'n)keyboard super tech. Wear your safety glasses!
Like all your videos. There great and you know your stuff HVAC/r.
Nice video