I'm a year into the field and 22 years old. I love how much pride you take in your work. I wish my boss/company would hold their work to this standard. I've been watching this channel for a couple years now and you have taught me so much
I don't think it's said enough. Thank you Chris for all the time you put into these videos sharing your experience. We know you don't have to do this for us but please know it is very much appreciated! I always look forward to Sunday morning HVACR school.
It's wonderful how mindful you are that your words might be taken differently by the techs that these videos are actually made for. Much respect for clarifying your intent when something could be taken the wrong way. More managers could learn from you on that subject.
Mr. Chris, I use your videos in my class (I teach level 3 hvac for the local apprenticeship). I hope you don't mind. Thanks for the tricks and tips! You are THE MAN!
I worked on a newer version of that unit about 2 weeks ago and we have had nothing but issues with it as a company and the metering device, drier were all replaced due a refrigerant flow issue and i got sent there the compressor was short cycling on low pressure and hooked my probes on it and found there was a restriction at the outlet of the condenser . Low and behold i cut the system open and isolated the condenser and could hear something rattling in the liquid header i had to drill out the end of header and caught a piece of round manufactured copper piece in there which looked like it was when Carrier pressed out the tube sheets. Would love to claim warranty but it was passed on it
Only do residential myself, nor do I have any interest in RTUs but I enjoy your videos and have learned stuff from you the helps me help my customers. Thanks for that.
On those carrier units I typically lift up the roof and put a tool underneath in order to change contactors and checked electrical connections because carrier was so nice to Jam everything right in that compartment near the roof LOL. Engineers: Well it looks good on paper let’s go with it! Techs: If I meet the engineer that designed this I’m gonna punch him right in the nose!
@Richard Cranium : I remember one time there was a brand new install and the customer wanted the company that installed it to have the maintenance contract. He said that those guys refused ???? Right there that tells you something…. It tells me that it was going to be a royal pain to do the maintenance because they did not install it properly. It happens a lot in this field you have a random unmarked vehicle and technicians that don’t have regular uniforms on just ripped up dirty T-shirts and blue jeans they slap it together and leave. End result I ended up getting that contract for about 14 years. The first maintenance I performed I had to remove the high-voltage wiring from entering the unit because you could not change an air filter along with putting Furnco’s in the condensate piping and moving thermostat wiring all because they took the easy route and it block the air filters from ever being changed. Believe it or not I had to literally cut a roof section open on two of the units in order to change the blower motors because they mounted the units so close to ductwork.
Thank you for this channel man and all the effort you put in. Been a tech for ~2 years and I've learned more from your channel than I have from my leads. They've all been great, but your approach is so thorough that it always helps me learn about things I would otherwise overlook. Better for me, better for my customers, better for the company - everybody wins. Cheers
Yep I fully agree... My old mentor boss always said a good teck learns something every day! An I have been doing this for the better part of 40 years and I still learn new tricks watching these videos...an old saying is; even old dogs can learn new tricks ;-)
I used to install suction line driers on their side, but was told to install them vertically, or at least at a 45 degree angle facing down, because they can trap oil, especially the large ones, with removable cores. I realize a lot of systems may not have the configuration to do this. Good video.
You deserve much more credit for the quality of content and knowledge you are transferring. When it comes to proper technique and procedures my companies most “experienced” vets don’t hold a candles flame to you….. Nitrogen, proper torch tips, safety, etc., what in the world are those things. New to the trade and already it seems I must learn twice, the right and the wrong so I can eat, and be willing to unlearn when the time is right!
Again, thank you for making sure the environment in which tasty beers come from remains optimal :) I was there last week. It's fun to try to find out which rooftop you're on, particularly since I'm familiar with the area.
I’ve been doing this since 2016. I can hold my own but have by no means “arrived”. Your channel is one that I watch regularly to learn new things. There have been several times when one of your videos addresses the exact issue I was dealing with. Thanks for taking the time to post this video
It's always fun watching someone else do a Carrier compressor... I was lucky to get into a management role earlier than expected, I hope when you decide to hang up your boots that your body is still in good shape. Especially someone with your skill and ability to teach and speak so clearly, you could probably make a great living without having to get your hands dirty ever again.
I used to co-own an HVAC company with 12 employees. I was always troubleshooting customers and employee problems… It was miserable, so I sold my ownership and started my own 1 man company and life has never been better. I’ll never hang up the tool bag. My happy place in life is standing in front of a broken piece of equipment.
@@July4.1776 As long as you don't become one of those broken pieces of equipment down the road. Mentally we could all do this forever, but our knees, backs, and other parts don't feel that way unfortunately.
TECH TIP I have found that a cheap plastic comb the finer bladed half works wonders on straightening condenser fins. So next time you are at Walmart grab an assortment pack of cheap combs. Saves a heck of a lot of time and no need to use anything metal. Thanks for sharing.
Hi again, enjoy watching your videos. I’ve noticed also that you’ve gotten back into a little bit of a bad habit on your brazing the joints. I think you can save yourself some solder and it will look better if your heat from the backside and solder from the front.
Some early Carrier scroll (Carlyle) compressors (circa 2005) were famous for vibrating enough to crack suction and discharge lines. They would even rip the bolts out of the base. I HAD 2 THAT CRACKED THE WELD WHERE THE MOTOR IS WELDED TO THE COMPRESSOR SHELL AND IT LEAKED AT THE SHELL.
Honestly, i dont understand the most of the stuff you doing there, BUT it is indeed very interesting and let me get a peek into stuff, i didnt see under normal circumstances. You would be a good doctor too !
Same here in Auz land Chris still heaps of old units on 22 but very expensive for customers R422d i think we use so many different refrigerants cant keep up.
The cracks in the curve on that suction line are quite common place on Carrier package units. I have sweated a number of those cracks up without a problem. Carrier made those tubes out of rigid copper and when you sweat the crack it anneals the copper.
I did a lot of these models for Rite Aid years ago, my suspicion was always imapcted coils (when guys didn't know to split) that lead to the overload and vibration. Nothing against the unit design, but they become such a headache when they are poorly maintained (more so than something like a Lennox L-Series).
Sounds like a design problem with the discharge line. You may have to install mufflers to take the pulsations out of the discharge line. I worked on a lot of large lieberts, and they always sent us mufflers to put in the discharge piping.
I got nothing to do with hvac but still verry mutch enjoy Watching your vids, with might make me a strange one but hey, thx for the reggular uploading, i really enjoy your vids
Was wondering the same thing. I'd imagine the Fins are aluminum, and the condenser pipes themselves are probably copper so as long as there's no refrigerant leak it probably wouldn't mess with the capacity of the unit at all
Wooo that was a trickier one, and yes i dont like those old carrier weather master because the wiring its a mess, since news, also nice life hack with the contactors i nenever guessed that were possible Ps: any advice with the "new" r410a carrier's, those with direct drive on the turbine, its just a kind of inverter motor connected directly to the turbine
@@DrHakennase I agree - and I would even have considered multi-wired cables between some points in those units instead of just a bunch of loose wires in the units that looks like a spaghetti accident. I'd consider to use a cable designated FKK (standard SS 424 17 01) here in Sweden with the more complex CENELEC code of H05VV-R. (in my opinion the CENELEC code is a lot harder to memorize). For outdoors installations on buildings I like to use the shielded EKLK or EQLQ, (Cenelec N07VA5EV-U), even though it might be overkill in some cases.
Had the same exact unit do almost the same exact thing two weeks ago. Compressor shorted to ground no leaks. Replaced compressor/drier. Good leak check 500 vacuum weighed in charge. Two days later suction line split in the same spot. Fixed leak checked good vacuum two days later flat again leak in the middle of the condenser coil. WTF?
In the automotive AC world we use a flourecant dye in the oil so if there is a leak its very obvious under a blacklight. Do they do that in the hvacr industry?
What do you typically charge customer for parts above cost percentage wise? IE contactors , compactors , transformers etc….. I’m sure it varies as the ticket items get more costly. Any advice would be appreciated.
QUESTION On that job How much time Does it take to complete that job. Would it be 8 hours journeymen 8 hours apprentice? I have a problem with underbidding
Marcus, we bid the job according to the man hours we figure + 10% for unexpected. But when is 2 of us on the same job ? It's man hours times two.. We charge Full rate for both persons. ( Helps absorb the expense of workman's comp, unemployment an insurance. ) Just because my helper is not a Master, does not mean that he/she does not work any harder than I do 👍 (We got 2 razor sharp female tecks an If I didn't add "she"? Lol they would not let me forget about it 😅 ) . . Bidding is a roll of the dice and there is always unexpected developmnts on every job. Sometimes it just isn't in the cards an we just break even. My old first mentor told me, if you're getting every bid you turn in? Your too low. An he was right..
I had mentioned before about using Primary Wire as the wiring inside the units, as it’s not THHN wire inside of units. And ol’ timer (well older than me) would use something like Primary Wire after the disconnect. It’s not car wire i.e. amplifier wire because it isn’t transparent. It was more like Welding Lead wire. Do you know what I’m referring to?
Greetings from Italy, and thanks for the interesting videos about those units ! i see u often fix or redo electrical cabling, even main wires. In this video, at min 15:01 u were showing the main power wires that from the main switch goes through the metal carcass up to the main control area. Those wires should'nt be protected with a secondary insulated pipe or at least with a rubber\plastic plug to avid the rubbing of the wires against the metal frame?
Lol at 10:10?? I could not help but say Hay get your head out of the road I can't see!! Lol I remember my Dad telling me .. Son?? You don't half to see I am doing the work I am the one that need to see... 😂🤣 But as to the refrigerants?? Let's face it these older units were not engineered and designed to run on a blend refrigerant. Yes they will work on a blend But! Not as efficient as the refrigerant they were designed to use..So yes I agree with you as long as 22 an 12 is available? I'm going to use it even though the cost is higher.. an on a blend each blend boils off at a different temperature an I have ran into units with a blend installed an the unit never work 100% like it did on a straight refrigerant.. But some day we will be forced to switch to the blends but hopefully by that time most of the units will be manufactured for blends.. Thanks for another great video!!
3 ปีที่แล้ว +4
It's legal to use R22 system? In Europe we go with r410a and from some year to R32 (for residential, for large unit we continue to use r410a)
A/C has been around for decades in US, so I guess there’s millions of r22 units that still need servicing? In Australia most new residential units are R32, even larger units are starting to change over.
In the US at least we’re in at the residential uses R410A, any existing R22 units can be repaired and remain in service in residential or commercial
3 ปีที่แล้ว +2
Oh nice, thanks for reply to my question! I now think of the benefit of repair the existing installed system. When it's over it get replaced with a new system. In Europe you can use R22 but not repair, if there is a problem you have to change it with a new one typically a R32
No new R22 systems have been built in over 10 years. You can service existing ones but R22 is very expensive. So typically repairs are expensive and push people to new equipment that does not use R22.
Just got my epa cert a couple weeks ago. They said you can't put nitrogen on refrigerant anymore (since like 2017 or something). Just fyi. They said you're suppose to put nitro and leak check that way. If you still can't find the leak you can add a trace amount of refrigerant to the system.
Great video. But on a serious not at what point does it become more feasible to just replace that system being that old, runs R22 and badly maintained. Because I’m willing to bet this tag was about at least 10% of the price of a brand new HVAC.
You’re lucky to have a tech. The company I worked for would consider this a one person job. Probably why I could never measure up to their expectations.
Chris great job!!! It’s supper cool when you clean those pistons, you can actually see it working, the nitrogen blows out harder as the wax melts and the piston clears I have used this method several times and had great super-heat after. To heck with buying the expensive TXV kits Trane and Carrier offer when this method works every time and by the way it’s keeps working. I have been back on a pm a year later and still running great superheat. Are you going to return to remove that suction drier or only if needed in the future will you pull it out ??? Thanks
@@garywarren5800 I would consider anything over 10 to be excessive. The important thing is , that you have to deliver solid liquid, without flash gas, to the metering device. The more pressure drop in the liquid line, the more sub cooling you need. Sub cooling is a measurement of how much liquid refrigerant is at the bottom of the condenser. Most manufacturers will specify how much sub-cooling their equipment is designed to run.
Question for anyone to answer, I want to get in to HVAC. But I don't have much money nor do I have equipment to begin this journey. I very much enjoy your videos and would like any type of suggestions to get started.
I'm guessing Chris anticipated difficulty finding the leak and added the refrigerant as a trace gas to assist an electronic leak detector. Many if not all leak detectors are good at detecting R-22 during a test.
Looks like it didn’t have a low pressure cutout. Instead they use a loss of charge switch on the high pressure side which is next to useless. Also on those style Carriers, it’s always a good idea to upsize the #1 compressor contractor from a 30 to a 40 amp contactor because the #1 compressor contactor also brings on the condenser fan motors. I’ve seen countless times where the #1 contactor will blow apart and #2 will run and cycle on head pressure. I’ve even seen a lot of these that don’t have any high pressure cutouts so #2 will just run until it dies. Also as someone else asked about suction line filters, I never install them because they need to be monitored and removed whenever they clog up and cause a large pressure drop. Most customers are too cheap to pay for the service.
When you set you torch pressures you shouldn't need to set them at more than 5 PSI each. As far as your acetylene pressure you NEVER set it more than 10 PSI because it can become unstable past that pressure which means bad things can happen. If you need more than 5 PSI, you have a problem with your torch not your regulators.
My ac lately has been freezing up at the unit we think it may be an expansion valve problem as the unit shows signs of low charge. The unit is 18 years old and only stopped working recently. Could the freezing of the ac mean an expansion valve problem due to the age and possible low charge?
No, those stay there untill/unless the tech does a acid test later. In this case since he blew out both (assuimng, he showed blowing out the evaporator coil) coil and removed an oil p-trap (liquid line part) and new suction and liquid line drier and new R22, he SHOULD be good as new. IF a later acid test came positive and he wanted to do a quick fix, he would replace both the liquid and suction drier with new ones and replace the refrigerant and possibly the oil. OR at that point ask the customer to replace or he would decommission the second stage.
Greetings from Sweden, question you are mixing nitrogen with r22 for leak search, are you using any specific ratio? Or is it just so that you have something in that detector can pick up
Your channel is so underrated. For someone like myself that has ZERO HVAC experience, this is good and quality content! Keep it up!
Man's got good work habits, seems to take pride in his work. Never half-asses anything I've seen so far.
My instructor plays these vids for us I'm 4 weeks in
I'm a year into the field and 22 years old. I love how much pride you take in your work. I wish my boss/company would hold their work to this standard. I've been watching this channel for a couple years now and you have taught me so much
"I'm working on getting my whole van up here." I almost spit my beer out. I felt that like I did the same thing this morning.
I don't think it's said enough. Thank you Chris for all the time you put into these videos sharing your experience. We know you don't have to do this for us but please know it is very much appreciated! I always look forward to Sunday morning HVACR school.
Chris is awesome!!
I agree
Watching this at midnight Sunday in Australia - was going to go to sleep…but then there is this video.
Now I’m watching it at midnight in America on Sunday night lol same deal
@@DillonV lol is 3 a.m. in Michigan.. couldn't sleep an said hell ya I got a vid to watch. ;-)
Great job and video like always
It's wonderful how mindful you are that your words might be taken differently by the techs that these videos are actually made for. Much respect for clarifying your intent when something could be taken the wrong way. More managers could learn from you on that subject.
Mr. Chris, I use your videos in my class (I teach level 3 hvac for the local apprenticeship). I hope you don't mind. Thanks for the tricks and tips! You are THE MAN!
Haphazard wiring triggers my OCD - glad to see I'm not the only one!
I worked on a newer version of that unit about 2 weeks ago and we have had nothing but issues with it as a company and the metering device, drier were all replaced due a refrigerant flow issue and i got sent there the compressor was short cycling on low pressure and hooked my probes on it and found there was a restriction at the outlet of the condenser . Low and behold i cut the system open and isolated the condenser and could hear something rattling in the liquid header i had to drill out the end of header and caught a piece of round manufactured copper piece in there which looked like it was when Carrier pressed out the tube sheets. Would love to claim warranty but it was passed on it
Finally, someone else who cleans up the ugly wiring on those carriers. I usually go through half a bag of wire ties.
Only do residential myself, nor do I have any interest in RTUs but I enjoy your videos and have learned stuff from you the helps me help my customers. Thanks for that.
On those carrier units I typically lift up the roof and put a tool underneath in order to change contactors and checked electrical connections because carrier was so nice to Jam everything right in that compartment near the roof LOL.
Engineers: Well it looks good on paper let’s go with it!
Techs: If I meet the engineer that designed this I’m gonna punch him right in the nose!
@Richard Cranium : I remember one time there was a brand new install and the customer wanted the company that installed it to have the maintenance contract. He said that those guys refused ???? Right there that tells you something…. It tells me that it was going to be a royal pain to do the maintenance because they did not install it properly. It happens a lot in this field you have a random unmarked vehicle and technicians that don’t have regular uniforms on just ripped up dirty T-shirts and blue jeans they slap it together and leave. End result I ended up getting that contract for about 14 years. The first maintenance I performed I had to remove the high-voltage wiring from entering the unit because you could not change an air filter along with putting Furnco’s in the condensate piping and moving thermostat wiring all because they took the easy route and it block the air filters from ever being changed. Believe it or not I had to literally cut a roof section open on two of the units in order to change the blower motors because they mounted the units so close to ductwork.
Thank you for this channel man and all the effort you put in. Been a tech for ~2 years and I've learned more from your channel than I have from my leads. They've all been great, but your approach is so thorough that it always helps me learn about things I would otherwise overlook. Better for me, better for my customers, better for the company - everybody wins. Cheers
Yep I fully agree... My old mentor boss always said a good teck learns something every day! An I have been doing this for the better part of 40 years and I still learn new tricks watching these videos...an old saying is; even old dogs can learn new tricks ;-)
That oof when the torch did a number on the condenser.
Though considering the shape it's in, not like it could be much worse 🤣
I used to install suction line driers on their side, but was told to install them vertically, or at least at a 45 degree angle facing down, because they can trap oil, especially the large ones, with removable cores. I realize a lot of systems may not have the configuration to do this. Good video.
You deserve much more credit for the quality of content and knowledge you are transferring. When it comes to proper technique and procedures my companies most “experienced” vets don’t hold a candles flame to you….. Nitrogen, proper torch tips, safety, etc., what in the world are those things. New to the trade and already it seems I must learn twice, the right and the wrong so I can eat, and be willing to unlearn when the time is right!
Again, thank you for making sure the environment in which tasty beers come from remains optimal :) I was there last week. It's fun to try to find out which rooftop you're on, particularly since I'm familiar with the area.
I’ve been doing this since 2016. I can hold my own but have by no means “arrived”. Your channel is one that I watch regularly to learn new things. There have been several times when one of your videos addresses the exact issue I was dealing with. Thanks for taking the time to post this video
It's always fun watching someone else do a Carrier compressor... I was lucky to get into a management role earlier than expected, I hope when you decide to hang up your boots that your body is still in good shape. Especially someone with your skill and ability to teach and speak so clearly, you could probably make a great living without having to get your hands dirty ever again.
Any trade school would be LUCKY to have him as an instructor!!
I used to co-own an HVAC company with 12 employees. I was always troubleshooting customers and employee problems… It was miserable, so I sold my ownership and started my own 1 man company and life has never been better. I’ll never hang up the tool bag. My happy place in life is standing in front of a broken piece of equipment.
@@July4.1776 As long as you don't become one of those broken pieces of equipment down the road. Mentally we could all do this forever, but our knees, backs, and other parts don't feel that way unfortunately.
TECH TIP I have found that a cheap plastic comb the finer bladed half works wonders on straightening condenser fins. So next time you are at Walmart grab an assortment pack of cheap combs. Saves a heck of a lot of time and no need to use anything metal. Thanks for sharing.
You are one of the very best in your knowledge and work!
Hi again, enjoy watching your videos. I’ve noticed also that you’ve gotten back into a little bit of a bad habit on your brazing the joints. I think you can save yourself some solder and it will look better if your heat from the backside and solder from the front.
Got an affiliate link for a multimeter I ordered. Thanks Chris. Keep up the excellent videos. 👍
Thank you Chris again and again
I am so excited about all your good videos
God bless you 🙏 and your family
Some early Carrier scroll (Carlyle) compressors (circa 2005) were famous for vibrating enough to crack suction and discharge lines. They would even rip the bolts out of the base. I HAD 2 THAT CRACKED THE WELD WHERE THE MOTOR IS WELDED TO THE COMPRESSOR SHELL AND IT LEAKED AT THE SHELL.
Just ordered a 🧢 and 👕 last night. Show my support here in the Northeast (Connecticut)! Dig what you do!
Honestly, i dont understand the most of the stuff you doing there, BUT it is indeed very interesting and let me get a peek into stuff, i didnt see under normal circumstances. You would be a good doctor too !
@29:29 ayeeee I noticed the TH-cam silver play button !! 🤙🏼 💯
Same here in Auz land Chris still heaps of old units on 22 but very expensive for customers R422d i think we use so many different refrigerants cant keep up.
one of the best techs in the biz..really enjoy his work.
The company I used to work at used R404a in all of their equipment. They switched to 449 and 134a for the shake machines and juice dispensers.
I like the tip about the contactor lugs..... I will be using that one!
The cracks in the curve on that suction line are quite common place on Carrier package units. I have sweated a number of those cracks up without a problem. Carrier made those tubes out of rigid copper and when you sweat the crack it anneals the copper.
Top notch work buddy. Thanks for the videos
Early morning Sunday upload. Nice! Good morning Chris!
2:18 I kid you not, that EXACT issue just happened on a unit last Thursday, hairline fracture most likely caused by overheating and vibration
I did a lot of these models for Rite Aid years ago, my suspicion was always imapcted coils (when guys didn't know to split) that lead to the overload and vibration.
Nothing against the unit design, but they become such a headache when they are poorly maintained (more so than something like a Lennox L-Series).
I have had a bunch of liebert mini mates with the compressor discharge line with cracks in them at the first bend.
Sounds like a design problem with the discharge line. You may have to install mufflers to take the pulsations out of the discharge line. I worked on a lot of large lieberts, and they always sent us mufflers to put in the discharge piping.
Great Job Chris! Good work and nicely done!!!
Lol, omg that life hack, in the trade for 20 years, never thought of that😢
Your R-22 comments were well-said.
I got nothing to do with hvac but still verry mutch enjoy Watching your vids, with might make me a strange one but hey, thx for the reggular uploading, i really enjoy your vids
I love it because when you remove compressors you let the soul create music while the compressor laughs that your taps are futile! 😂
Another Sunday...Another HVACR video. Got my cuban coffee....im set
Perfect start of a Sunday afternoon 😍
Greetings from Austria 🇦🇹
I'm on east coast of US, it's early AM here. Lol
@@c117ls7 nearly 2pm in Europe 😄
Great job Chris !
Saw the torch hit the condenser, felt that one. Does it cause any damage worth caring about?
Was wondering the same thing. I'd imagine the Fins are aluminum, and the condenser pipes themselves are probably copper so as long as there's no refrigerant leak it probably wouldn't mess with the capacity of the unit at all
Thanks man for sharing with us your experiences I have learned a lot of watching your vedios
Excellent work as always!
I didn’t know that about contractors with lugs. 👍 I will be using that tip a lot.
Wooo that was a trickier one, and yes i dont like those old carrier weather master because the wiring its a mess, since news, also nice life hack with the contactors i nenever guessed that were possible
Ps: any advice with the "new" r410a carrier's, those with direct drive on the turbine, its just a kind of inverter motor connected directly to the turbine
Great videos with quality content !!!
Great job sir. You make it look easy..
I often wonder what the hell carrier was thinking when they constructed their electrical sections in those rtus
I work in germany and we allways have some sort of cable channels of some sort^^ The cables in those units are really messed up
@@DrHakennase I agree - and I would even have considered multi-wired cables between some points in those units instead of just a bunch of loose wires in the units that looks like a spaghetti accident. I'd consider to use a cable designated FKK (standard SS 424 17 01) here in Sweden with the more complex CENELEC code of H05VV-R. (in my opinion the CENELEC code is a lot harder to memorize).
For outdoors installations on buildings I like to use the shielded EKLK or EQLQ, (Cenelec N07VA5EV-U), even though it might be overkill in some cases.
I finally see the wires all fixed 🤘
respect from Arizona
Had the same exact unit do almost the same exact thing two weeks ago. Compressor shorted to ground no leaks. Replaced compressor/drier. Good leak check 500 vacuum weighed in charge. Two days later suction line split in the same spot. Fixed leak checked good vacuum two days later flat again leak in the middle of the condenser coil. WTF?
In the automotive AC world we use a flourecant dye in the oil so if there is a leak its very obvious under a blacklight. Do they do that in the hvacr industry?
What do you typically charge customer for parts above cost percentage wise? IE contactors , compactors , transformers etc….. I’m sure it varies as the ticket items get more costly. Any advice would be appreciated.
there should be thermal cutoff switches internally.
there should also be low pressure switches to prevent running the compressor without a charge.
QUESTION On that job How much time Does it take to complete that job. Would it be 8 hours journeymen 8 hours apprentice? I have a problem with underbidding
Marcus, we bid the job according to the man hours we figure + 10% for unexpected. But when is 2 of us on the same job ? It's man hours times two.. We charge Full rate for both persons. ( Helps absorb the expense of workman's comp, unemployment an insurance. ) Just because my helper is not a Master, does not mean that he/she does not work any harder than I do 👍 (We got 2 razor sharp female tecks an If I didn't add "she"? Lol they would not let me forget about it 😅 ) . . Bidding is a roll of the dice and there is always unexpected developmnts on every job. Sometimes it just isn't in the cards an we just break even. My old first mentor told me, if you're getting every bid you turn in? Your too low. An he was right..
I had mentioned before about using Primary Wire as the wiring inside the units, as it’s not THHN wire inside of units. And ol’ timer (well older than me) would use something like Primary Wire after the disconnect. It’s not car wire i.e. amplifier wire because it isn’t transparent. It was more like Welding Lead wire. Do you know what I’m referring to?
I’ve seen leaks in that exact location on several occasions. Vibration is likely the culprit.
Free tip Sunday. Great video
question, when you where sweating in one of driers you hit the condenser in two spots (10:54 ish) did that cause a leak?
no, just allu fin that melted for sure
Nope, he’s good.
I get why you don't use the R22 alternatives, but the new compressors come with POE oil in them, so R407C is an easy call for most of us.
You Make brazing look so easy
Greetings from Italy, and thanks for the interesting videos about those units ! i see u often fix or redo electrical cabling, even main wires.
In this video, at min 15:01 u were showing the main power wires that from the main switch goes through the metal carcass up to the main control area.
Those wires should'nt be protected with a secondary insulated pipe or at least with a rubber\plastic plug to avid the rubbing of the wires against the metal frame?
Good video Chris👍
Lol at 10:10?? I could not help but say Hay get your head out of the road I can't see!! Lol I remember my Dad telling me .. Son?? You don't half to see I am doing the work I am the one that need to see... 😂🤣 But as to the refrigerants?? Let's face it these older units were not engineered and designed to run on a blend refrigerant. Yes they will work on a blend But! Not as efficient as the refrigerant they were designed to use..So yes I agree with you as long as 22 an 12 is available? I'm going to use it even though the cost is higher.. an on a blend each blend boils off at a different temperature an I have ran into units with a blend installed an the unit never work 100% like it did on a straight refrigerant.. But some day we will be forced to switch to the blends but hopefully by that time most of the units will be manufactured for blends.. Thanks for another great video!!
It's legal to use R22 system? In Europe we go with r410a and from some year to R32 (for residential, for large unit we continue to use r410a)
Chris says existing R22 systems can be repaired indefinitely (compressor, condenser and evaporator). New builds have to switch refrigerant.
A/C has been around for decades in US, so I guess there’s millions of r22 units that still need servicing? In Australia most new residential units are R32, even larger units are starting to change over.
In the US at least we’re in at the residential uses R410A, any existing R22 units can be repaired and remain in service in residential or commercial
Oh nice, thanks for reply to my question! I now think of the benefit of repair the existing installed system. When it's over it get replaced with a new system. In Europe you can use R22 but not repair, if there is a problem you have to change it with a new one typically a R32
No new R22 systems have been built in over 10 years. You can service existing ones but R22 is very expensive. So typically repairs are expensive and push people to new equipment that does not use R22.
Just got my epa cert a couple weeks ago. They said you can't put nitrogen on refrigerant anymore (since like 2017 or something). Just fyi. They said you're suppose to put nitro and leak check that way. If you still can't find the leak you can add a trace amount of refrigerant to the system.
That’s right. Just a trace of refrigerant is all you need. 50 lbs of refrigerant pressure is excessive.
Try Yellow Jackets fin comb kit. Excellent.
Watching this as a drive to an AC call 🤙🏼
Great video. But on a serious not at what point does it become more feasible to just replace that system being that old, runs R22 and badly maintained. Because I’m willing to bet this tag was about at least 10% of the price of a brand new HVAC.
Question, theoretically, can you check continuity through the pressure switches to see if they still work?
You’re lucky to have a tech. The company I worked for would consider this a one person job. Probably why I could never measure up to their expectations.
You should make your leakage Test at least at the working pressure or above.If a unit is working at 350 PSI you should Test at 350 PSI and not below !
Chris great job!!!
It’s supper cool when you clean those pistons, you can actually see it working, the nitrogen blows out harder as the wax melts and the piston clears
I have used this method several times and had great super-heat after. To heck with buying the expensive TXV kits Trane and Carrier offer when this method works every time and by the way it’s keeps working. I have been back on a pm a year later and still running great superheat.
Are you going to return to remove that suction drier or only if needed in the future will you pull it out ???
Thanks
Thanks for the vids ‼️
Good morning!
I noticed you said that 19 and 23 subcooling is within range. That seems awful high to me , how do you justify that high of a subcooling ?
I would expect this from a TXV maybe but I thought you said it was a fixed metering device.
@@garywarren5800 I would consider anything over 10 to be excessive. The important thing is , that you have to deliver solid liquid, without flash gas, to the metering device. The more pressure drop in the liquid line, the more sub cooling you need. Sub cooling is a measurement of how much liquid refrigerant is at the bottom of the condenser. Most manufacturers will specify how much sub-cooling their equipment is designed to run.
whats your opinion on 'ecofreeeze' replacement refrigerant for R22?
So, it says R448a is a replacement for R404a and R22. Do you recommend R448a as a R404a replacement?
If you don’t have a noticeable drop across that suction line filter drier after a few months are you just going to leave it in place?
Its for safety. Just leave it in.
Yeah I will leave it in
Question for anyone to answer, I want to get in to HVAC. But I don't have much money nor do I have equipment to begin this journey. I very much enjoy your videos and would like any type of suggestions to get started.
Good job and good
1:35
Why do you add R-22 to the nitrogen?
I'm guessing Chris anticipated difficulty finding the leak and added the refrigerant as a trace gas to assist an electronic leak detector. Many if not all leak detectors are good at detecting R-22 during a test.
Looks like it didn’t have a low pressure cutout. Instead they use a loss of charge switch on the high pressure side which is next to useless. Also on those style Carriers, it’s always a good idea to upsize the #1 compressor contractor from a 30 to a 40 amp contactor because the #1 compressor contactor also brings on the condenser fan motors. I’ve seen countless times where the #1 contactor will blow apart and #2 will run and cycle on head pressure. I’ve even seen a lot of these that don’t have any high pressure cutouts so #2 will just run until it dies. Also as someone else asked about suction line filters, I never install them because they need to be monitored and removed whenever they clog up and cause a large pressure drop. Most customers are too cheap to pay for the service.
When you set you torch pressures you shouldn't need to set them at more than 5 PSI each. As far as your acetylene pressure you NEVER set it more than 10 PSI because it can become unstable past that pressure which means bad things can happen. If you need more than 5 PSI, you have a problem with your torch not your regulators.
Disfruto sus videos... exelente
My ac lately has been freezing up at the unit we think it may be an expansion valve problem as the unit shows signs of low charge. The unit is 18 years old and only stopped working recently. Could the freezing of the ac mean an expansion valve problem due to the age and possible low charge?
Take a subcooling reading. That will tell the difference between a bad expansion valve and a shortage of restriction. Both will cause high superheat.
@@rodgraff1782 unit ended up having a major leak and was replaced along with a rerun of the lines. The system was old and beat up.
Chris, do you ever use Rx-Acid Scavenger along with new suction and liquid line filter driers?
I always hated the Carrier power terminations with the wire nuts. Sloppy. But that's the factory for you
Do you have to go back a few weeks later to remove or replace the suction drier?
No, those stay there untill/unless the tech does a acid test later. In this case since he blew out both (assuimng, he showed blowing out the evaporator coil) coil and removed an oil p-trap (liquid line part) and new suction and liquid line drier and new R22, he SHOULD be good as new. IF a later acid test came positive and he wanted to do a quick fix, he would replace both the liquid and suction drier with new ones and replace the refrigerant and possibly the oil. OR at that point ask the customer to replace or he would decommission the second stage.
Greetings from Sweden, question you are mixing nitrogen with r22 for leak search, are you using any specific ratio? Or is it just so that you have something in that detector can pick up
Yeah there is no specific ratio I just put about 50 ish psi or R-22 and the rest is nitrogen
@@HVACRVIDEOS Thank you for answer, great video as always 👍🏻
I've never seen a line crack like that lol. Thats nuts
Nice video
Mornin chris
I USED TO CALL THOSE CARRIER WHEATHERMAKER PAKS TROUBLEMAKERS.
Giving the costumer the choice of R22 or replacement is AWAYS the right way.