NO GOOD DEED GOES UNPUNISHED

I figured I'd just hop on the roof and hose everything off... That backfired a bit but in reality I would have been called out later in the night so at least I caught it before I left.
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[@Powertampa]

My dude over there sniffing refrigerant xD

[@ntsecrets]

That’s all part of big picture diagnosis!

[@lordjaashin]

it is funny but it worked out in their favor of alerting them about possible acid contamination

[@LC-qi5ff]

Gotta do what you gotta do

[@kappa8767]

I do sample test too with a balloon

[@WHPL4SH]

Not to be a downer, but lately I have been lamenting the fact that customers cannot understand the amount of attention to detail and care we put into this trade. Try and explain how this compressor is inefficient and not properly pumping down and there is no way they could possibly understand what is occurring and may potentially think we are trying to rip them off. Rough job with these restaurants; constantly trying to keep them up and running, and they can not possibly understand the amount of stress we go through trying to keep them going when it seems like we care exponentially more about their equipment than they do.

[@adamdnewman]

So many people have the mentality of no pm if it appears to run/ work its fine. Gone is the trust and understanding that maintenance will save money, because it's all about short term "savings".

[@sherwinalvarez7365]

Well said.

[@JFirn86Q]

Don't be shortsighted, you need to understand their perspective. They have a business to run, people to pay, payments to make, and the last thing that they can possibly think about is their HVAC system. To them, it is a expense that has to be recovered through business. Sometimes there is not the business there to cover that expense at the moment, so they are forced to do the minimum on some things. HVAC is so out of sight, out of mind for most people, it's a natural place to be forced to cut back on. Also - the HVAC community has somewhat of a reputation for having bad actors, so the guard is up on being taken advantage of. Just need to remember empathy and think of being in their shoes. They aren't stupid or inept usually, just priorities are different for many reasons. Coming to an understanding together on this through educating is the best way forward.

[@dd19892]

'we are trying to rip them off'...Yes because 99% of time techs do rip customers off. $400 for a capacitor swap out for example.

[@DistrustHumanz]

Hard to blame a business owner these days for being paranoid. For every honest tradesman (regardless of craft), there are at least ten that will lie to your face and rip you off.

[@donbenjamin3]

I’m not an HVAC tech, just someone who’s interested in the thermodynamics. But what I really appreciate are your clear explanations, knowledge, and professionalism. Thank you.

[@TheBalconyWorkspace]

Well as an electrician I dont know a thing about HVAC industry or what the correct discharging line temp is, what I really like about Chris is the process he analysis and solves problems. Salute!

[@dashcamandy2242]

17:53 - Imagine having a compressor destroyed by the one device specifically-designed to protect it from damage... I sympathize with your 100°F rooftop days. Connecticut spent the last two weeks in the 80s & 90s with 90-100% humidity. Last night a batch of strong thunderstorms rolled through dropping us down to 59° this morning, and this afternoon its 73°F with 55% humidity, which is such a delightful respite! Actually got the door open to the garage/man cave today in the hopes I can dry out all the condensation on the concrete. So far, the situation has gone from "glossy floor" to "damp floor," so I'm making headway! 🤣

[@randomrazr]

does the foam need replacing?

[@semidvdcdt8433]

This is probably my new favorite video that you posted. Loved the deep diagnosis and information at the end. Awesome work. I wished i had time to do the same.. And YES google /pdf is one of the IF NOT the most important tool now you can work with. ❤

[@HVACRVIDEOS]

Thanks bud

[@niernor]

Regarding your connection issues with the wireless tools: These point to point connections between buildings are mostly running on 2.4Ghz, the exact same frequency your (Bluetooth) tools are running on. Depending on the location of the antenna and the other building the Fresnel Zone (just google for a picture to get a feeling for whats happening) extends throughout the whole roof and floods your devices with unwanted signals. Maybe you can find a workaround by using some metal shields, especially for your Laptop.

[@thomasvlaskampiii6850]

Most wifi routers also use 2.4GHz. So if there's a lot of wifi connections in his area, he might simply be out of usable channels. Although, I think wifi and Bluetooth run on slightly different segments of the 2.4GHz band, so they might not interfere with each other. Personally, I would download a wifi analyzer app and a Bluetooth analyzer app, both should be free (they were for me), and that'll tell you mostly where the issue lies. It won't expose fresnel zone interference though

[@andrewrees6618]

I say this all the time..." people trip over dollars to pick up pennies." It used to frustrate me to no end. Then I realized that it was futile to try to convince them of cost efficiency. I just do the work and take the money. I also am careful going forward because it means they are doing badly and eventually I will be stiffed.

[@Ariccio123]

At some point, I really hope to see manufacturers design digital pressure sensors into HVACR systems, and log the data into an onboard computer. It would make the kind of diagnostics you are doing with the cut open compressor easier, and a lot more scientific!

[@philltafolla]

Copeland scrolls don’t like being pumped down below 15psi . They will develop internal damage. I have replaced several Copeland Scrolls on Russell , and Heatcraft units that came set to CI at 20 psig and CO at 5 psig 👎🏼. Also if you pump a scroll down below 15 psig it quickly bypasses and keeps turning on and off like it’s on crack . I fix this issue by installing a low pressure control setting it to cut in at 35 psig and cut out at the lowest safest point which will be 15 psig . That seems to work for me . Good video 😃

[@mematyi]

You can always carry a threading die set for the common UN threads for the rotalocks, flare fittings, etc. if you manage to braze the threads.

[@gregaluise5727]

Just wanted to say thank you for your content/channel. I'm a software developer by day but had a strong passion that could have lead me into the trades (probably electrician or HVAC if had gone that path instead - especially on the controls side - I've worked in facitilties IT teams and had the pleasure of helping out with Andover/Tritium/Staefa control systems in the past). You're videos are super informative in general and even help some of the laypeople (like myself) understand some of the basic principals behind the equipment that keeps us/our food cool. Thanks!

[@terrygrant8126]

Thank you taking the time out to teach about the issues you come across....I enjoyed spending time off on Sunday so that I could spend time with you and Will on the hot roof....Thanks friend!

[@MattTrevett]

The bypass sound is definitely audible to me through the video, especially as it gets further along (worse).

[@peterhodgkins6985]

Another fascinating adventure! Nice work around to keep 'em limping along 'till the hardware could be secured. Love the equipment autopsies!

[@DelticEngine]

Loved the video, Chris. It's always interesting to know for of the details and again you are an inspiration. I liked the look at the Applications Guidelines as I wasn't aware of what documents were available and what nomenclature the manufacturer used to describe them which is important in finding the right kind of document. I paused the video, found and downloaded the document you were looking at so I could read it as you did and with the video. A few other manuals turned up in the search, so I've downloaded a few more. Your video was helpful in providing a place to start. Whenever I can get a detailed enough image to read a nameplate or other detail in a video I will make a note. I can then look up the equipment you are working on so I can gain information from the video and documentation. I now have a growing collection of such documentation.

[@davidsharkey3483]

Great video,you’re the only one I’ve ever seen take these things apart and try to figure out what went wrong. I’ll bet a lot of people in the field have never seen the inside of these compressors.

[@JJMEdiger]

It looks like the issue with the pressure control was masked each time you hit it. Thanks for making the vids.

[@abhijeetchandra4657]

The best way to tell if your compressor is by-passing is to pump it down turn the unit off and see if the pressure on your low side rises significantly 😉

[@sciguy4297]

The two dishes you were looking at there are both receivers (likely TV), they don't transmit anything. You shouldn't be getting any interference from them, might be another telecoms thing on the roof doing it. A Starlink (or similar internet dish) could absolutely cause this kind of issue though, especially with the rather week Bluetooth transceivers in those clamps. Doesn't take much to knock them.

[@nathanharvey1162]

It's amazing how you do this and keeping your customers happy

[@pnp8849]

Temp low cutout using service port is awesome idea. I always wonder what to do if those switches ever go bad. 25lbs of 404a, wow! that's crazy never seen that much but then I'm only start doing walk-in about 1yr ago. Learn lots of stuff from you and owe you financial support.

[@armandodeleon5047]

14:46 🏡💪🏽 used to nag about the heat here…then i seen one of your temp probes reading well above 100°F in the AM🤯 strongest compressor i know of is your heart bcuzz gatdaym🤣 Great video!

[@GeminiSeven43]

It's a bummer when you can't change out a pressure switch without having to recover the refrigerant but I guess that having a service valve to isolate it means that there will be a possibility that someone may leave the valve closed and then you would have the same situation of the compressor being damaged due to overloading. Thanks so much Chris for taking us along and also for being a Professional that goes the extra steps to make sure that his or her customers are well taken care of.

[@jt7284]

Always acid test when replacing any compressor because it's only take a seconds and is cheap insurance

[@DEW409]

You are a true professional. Your customers are lucky to have you. Maintenance does not cost, it pays, as long as a competent, honest firm like yours is used so the customer is assured that the maintenance is actually done properly.

[@chicago_race_engines7538]

I disagree...it definitely costs however good pms and troubleshooting limits the costs.

[@inhocsigno9151]

It's interesting to see real world problems on a big working site. I'm not HVAC Tech, but i follow most of what you are saying/doing.

[@gordonrockafellow1211]

When a Rotolock valve is front seated the pipe connections to the valve are sealed and both 1/4" ports are open to the compressor only. to change the low pressure control you would have only lost the refrigerant remaining in the crankcase.

[@HVACRVIDEOS]

Good point, I will discuss this on my livestream this evening 7/31/23 on KZbin @5:PM (pacific) come on over and check it out kzbin.infoqEza1nnkhpA

[@DellaroyEngineering]

I have had a bad check valve on a compressor like this. A quick fix was just to purchase an external check valve and it solved the problem. I just put it as close to the compressor as possible. I also had a bad pressure control and had to change that too. It was a sht show. I also put a time delay for good measure. I also always put Schrader cores in the pressure switch access for this very reason. You can add schrader adapters to the rotolock

[@GiuseppePennisi-wu6yu]

Nice video. I appreciate that you are making great videos.

[@bluecollardownunder3616]

That's one heck of HVACR sixth sense approach mate!!

[@Goldstacker1972-kp2bh]

I know everything. 40 years I f doing it. Every once in awhile im surprised but after 40 years thevonly thing im starting to learn mire about is r290a. But it seems pretty straight forward in what had been taught about it so far. I truly enjoy learning new stuff because the job gets bornibg when you pttetty nuch know everything thats going on.

[@MariosACandRefrigeration]

great video,for your climate ,i would recommend less winter charge,it would be better to get a call in the winter.on some units a few ounces makes the difference.thanks for sharing.

[@user-im8rm4wl4k]

It seems to me that problem of this plant is overload with refrigerant

[@annaplojharova1400]

I think it started as a seized pressure control not cutting off the pump down, causing the compressor to overheat and cycle on the head temperature valve snap disc (blowing hot gas onto the thermal cutout switch). After way too many cycles the snap disc fatigue made it to just gradually leaking. I think the head temperature valve disc disc slowly opening instead of a snappy action won't be that big a deal, as once it starts leaking, no fresh cool gas would go into the compressor, so the head temperature will rapidly rise so it will warm up the cutout switch anyway. In the meantime the disc in the separation plate got loose because all that heat exposure, leaking the gas around, so it was unable to pump down the pressure anymore, making the problem worse (I would assume when the minimum specified cutout pressure is 17, the compressor should still be able to reach that low without trying that hard). I also think the cause was the failed pressure switch left way too long to overheat and essentially kill the compressor.

[@MariosACandRefrigeration]

he said he recently replaced the condenser motor,maybe HPS adjusted too high above relief pressure.

[@annaplojharova1400]

@@MariosACandRefrigeration First that would make atactivating when actually cooling down, when it gets rather high pressure (for the intake) gas from the evaporator and not at pump down, when all pressures become lower. And second, the traces within the compressor (the damage of the seal of the pipe redirecting the released gas onto the thermal switch) had shown it was the snap disc what activated. And this is responding to head temperature and not pressure. The too high head pressure and related overload causes mainly the motor winding to overheat (high mechanical loading, so high current draw), not that much the discharge gas chamber (high pressures do not need that much of a compression ratio to become really high). But here the winding had no sigh of heat damage (according to me), but the discharge gas path was clearly scorching hot. This tells me, there was not much pressure to load the motor (so not that much of pressure difference), but very high compression ratio making the adiabatic compression to reach very high temperatures. And low difference can have high ratio only when starting at low pressure (nearing vacuum if taking to an extreme). So it goes back to the faulty low pressure switch (which job is essentially to stay away from the high compression ratio operation n the first place)

[@LC-qi5ff]

@@annaplojharova1400are you a compressor expert? Also what is a rotor lock compressor?

[@annaplojharova1400]

@@LC-qi5ff Not "compressor expert", just taking the basic gas thermodynamics (what the temperature does when compressed), mechanics (pressures affecting motor loading) and way the motors work (high load causing high current, high current causing more heat created within the winding) and trying to put it together what is happening with it under those discussed fault scenarios. And the engineering general principle of cost reduction that every detail is cost optimized so much it has about the same margin to fail over the designed lifetime, so if one thing fails/deteriorates faster than other (clear heat damage on the compressor head vs not that much on the winding) tells what part has been overloaded (almost every such damage sequence too high temperature stress as the direct cause of destroying anything, be it oil losing lubrication ability, leaky seals of something not moving, winding insulation discoloration and failure, metal weakening and breakage,...)

[@eddevoe2519]

HH driers are cheap insurance when installing new comp if you suspect in any way oil breakdown or on older systems the new refrigerants scrub the inside copper walls.

[@Cellphoneman]

Good video. For all of us DIY weekend warriors, could you explain every once in while what “bypass, pump down, thermal” etc, means? That way we can visualize what is actually happening internally? This would allow us to see how you got to the diag issue?

[@gunnargu]

I'm a weekend warrior too, but here are my guesses: bypass: An internal valve that relieves pressure from one side to the other, supposed to prevent the compressor or tubing from exploding pump down: when the magnetic solenoid downstairs is closed by stopping power to it by the temperature control, the compressor continues until the low pressure cutout stops the compressor. When the temp control reaches its high limit, then the solenoid gets power again to open, which untrips the low pressure control and the compressor starts again thermal: an internal thermal safety switch that if it reaches a certain temperature, it stops the compressor, to prevent meltdown i assume

[@semidvdcdt8433]

Fyi: Pump down means you are pumping the refrigerant down in a certain point in the system ( normally the receiver) for a repair OR the unit is " pumping down" when satisfied on temperature or for a defrost in " standard" operation. An electro valve shuts down between the receiver and the evaporator inside. When de-energized, the valve shuts off and the refrigerant won't pass through... So the compressor will " pump down" the refrigerant . Compressor bypassing : higher pressure discharge going back to the lower suction side. Mainly the " valves / valves plates " are defective in simple words. When a piston is going up, you are compressing the gaz to push it through the discharge valve and when the piston goes back down , the gaz in the cylinder chamber becomes lower than the discharge pressure so the valve closes back. If it doesn't shuts off properly your high pressure will go back into your lower pressure. " Bypassing" Thermal overload: depending on the type of thermal OL( overload) is basically an internal safety ( in this case) that will OPEN the the windings of the compressor as a safety if the compressor runs too high on temperature/ overamping etc.. Why he cooled it off with cold water to make the process faster. My english isn't perfect but i hoped it help a bit

[@raulrse]

I like that quiet frustrated "WTF" haha

[@zekenzy6486]

Great Video. Thank you for sharing

[@Arides2010]

Out of curiosity: what is the OLDEST compressor you ever had worked on, because the customer thinks "it still runs fine"? For me it is an 1993 open compressor from "Bitzer" and my boss literally told the customer, that if ANYTHING happens after we changed almost every gasket and o-ring in that hunk if metal, that we won't do any further repairs. Just in case I don't use the proper english technical term: by open compressor I mean, that the compressor is driven by an outside motor via pulleys and a belt.

[@FerdinandFake]

Just did a head gasket on a late 90s bitzer a few months ago, those things are built like tanks

[@jasonjohnsonHVAC]

Trane open drive....from the 1970's....we service a building with an old 1950's Carrier 19C with vacuum tubes.

[@thomasmann3560]

I had a freezer scroll that refused to pump down. And you could hear the hissing. Charge was correct and It got stuck at like 26psi. Even with the LLS closed. So we let it run for 2 days while we got a new compressor sorted for them.

[@chap3845]

Front seating those valves will isolate the piping and you can change that pressure control once you "recover" the pressure from the compressor. Probably lose like half a pound of vapor in the compressor. But regardless good video. And sounds like you needed new gas anyway.

[@harpstertodd1973]

Really enjoy your stuff. Have you ever thought of using solid state contactors in high sand and dust situations? They can switch millions of times with no issues. They are more expensive, but if the customer would be willing to switch to them, could be ideal in your conditions. Allen Bradley and others make them. Just a thought, dude.

[@deaconwanderer2409]

I’m sure you know this but those field piece probes hate dirty copper, I try to keep a piece of sand cloth in my bag to clean a section where I’m putting my probes. When the copper isn’t clean they still work but sometimes they refuse to work unless it’s on a clean pipe.

[@ntsecrets]

Man with those ambient temps you’ll have to get the supco coolTECH (same basic device but you put it on your head)

[@stephenbullock-yn3vh]

You know the outside temperature going to rise in the future.I have a feeling that you will be changing air cool condensers needs to be water cool condensers.on your next live show.can we talk about this matter

[@paulb4496]

I love the "SWIVEL TEE TRICK" for peanut style pressure switch replacement just install swivel tee fittings and leave the old switch there!

[@HVACRVIDEOS]

I will discuss this on my livestream this evening 7/31/23 on KZbin @5:PM (pacific) come on over and check it out kzbin.infoqEza1nnkhpA

[@throttlebottle5906]

they tend to loosen or crack with age. vibration kills them, especially with switches and wiring or the long cap tubes going to controls, you'll often find the tubing dancing with harmonics and vibration. that puts load on the tee and work hardens/stress fractures. pretty much they're best for temporary use or somewhere not connected to a compressor directly, say on receiver tank, other taps.

[@rustblade5021]

yeah tv dishes won't cause interference but VSATs, which bidirectional, are notorious for it. those are those slightly larger dishes you see on gas stations and other chains they use to process credit cards and other stuff

[@dadaselectro4794]

thank you very much for a great video!

[@FerdinandFake]

Sometimes with freezers i have to crank down on the suction valve when doing a warm startup, not so much because of overload but overpressure because the condenser sucks and/or its too hot

[@ElectraFlarefire]

Not sure if your meter does it, but some that I've played with that have auto off will wake up when you press the mode/select or equivalent button. Saves clicking through the selector back to 'off' if you want the same setting and your meter does it.

[@jasonjohnsonHVAC]

Been the story of the summer here in Austin.....high pressure lock outs left and right....most of the equipment here was designed for 95-98°....and its been 100°-109° with heat index's of 105°-125°.....got to strike while the iron is hot.

[@Bryan-Hensley]

I'm in East Tennessee and we had a heat index of 120 the other day and everything seems normal. I don't think the heat index applies to HVAC quite the same as a sweating human..

[@jasonjohnsonHVAC]

​@Bryan-Hensley you are correct...it is for human comfort or lack there of, but it still doesn't change the fact the temps are way over design and its causing lots of issues....especially with DOAS units...they are tripping left and right

[@Bryan-Hensley]

@@jasonjohnsonHVAC that doesn't seem to happen around here nearly as much as southern California even though our heat index is the same many times. However (even though it's not happened in 10 years) when we go over 100, the systems do the same as there. When I started this business in 2001 it used to get above 100 at least a few days per year, but for the past 10 years or so it barely tops 90. Our nights used to stay above 70 for weeks, now it rarely hits 70. It's actually hurting my business some. I don't have those overwhelming rush periods anymore. Dang global warming..

[@jasonjohnsonHVAC]

@@Bryan-Hensley we are only getting to 95-98° at 9-10 at night and its getting only down to the high 80's at night...no rest for the wicked....on Friday i worked from 7:30 am till 2:30 Saturday morning....im ready for a break already.

[@andrewgoodman4209]

Great video as usual chris! Do you have a part number or something for those rotolock sweat adapters you used? Those could definitely come in handy

[@nakiapringley5391]

Great video, bro

[@danpresson]

Awesome video stay cool

[@16valve64]

Thanks a lot Chris

[@stephennichols4815]

Discharge line temperature safety switches for compressors are cheap protection from other components in the system failing that causes the compressor to overheat

[@timothygoltz1372]

Is there a particular brand of acid tester that you use or recommend? Also, can you potentially show, in one of your next videos, how to properly acid test? Love your videos man. So interesting, addicting and informative.

[@johnwalker890]

Good job Chris.

[@MariosACandRefrigeration]

you can pump it down,close the high side valve on the compressor and use your gauges to transfer the compressor gas to the low side and do a hot swap with very little pressure.what do you think ?

[@HVACRVIDEOS]

I will discuss this on my livestream this evening 7/31/23 on KZbin @5:PM (pacific) come on over and check it out kzbin.infoqEza1nnkhpA

[@bdblazer6400]

26:00 consider cleaning the gasget surfaces with abrasive cloth next time

[@tonyvolbeda952]

like your channel...was in hvac/refigeration (had 200+ commercial accounts)...in 30+ years saw drastic change in motors starting with the use of capcitators to EMCs...one of the best developments is the field reversible motor...complaint though; to do with the manufactures all haveing such short reversible leads and how, as concerned techs, are we supposed to properly secure them especial when the butt end of the condenser fan is secured to the top of the unit (upside down)...for, what, a couple bucks more, they could make the leads as long as the other wires so the tech can route them properly instead of left hanging in the air... and this passes underwriters testing?...did you figure a solution

[@jeffsmith846]

If it's "only" 100 there how does the equipment in Phoenix and other areas work with temps above 110?

[@HappilyHomicidalHooligan]

Different setup...the systems are always designed for local conditions...so any system in Phoenix will be speced for the higher ambient temps found there...

[@johnwood702]

Watching your channel is very interesting but I must say that technology has certainly come into its own in the last 40 years.

[@Marmotious]

Ayyyyyy Bakersfield!

[@eddevoe2519]

Ya the check valves leak. Manufactures have gone to adding time delay on start to stop the short cycling and an external check valve. I want my semi herms back.

[@pnp8849]

Thanks!

[@HVACRVIDEOS]

Thanks so much !!!

[@jackhandyy]

Yeah I can kinda hear it bypass. It's such a high freq noise so it's hard to hear with the compression of KZbin

[@user-ze6dz1mf4m]

Big Picture. I wanted the flux coated rods, but no more! Thanks.

[@Bryan-Hensley]

Maybe gasses blowing by the seal. Not sure what the seal separates though. This always concerns me. That pressure control can easily kill a compressor without alerting anyone

[@MarkCarpenterHVAC-me2jg]

I wanted the flux coated rods, but no more! Thanks

[@andrewgilbreath1331]

I heard that bypass on the first cycle.

[@ShukenFlash]

Same, the hissing was definitely audible.

[@Tresla]

Do the trash compressors get recycled? Seems like a lot of valuable metals in there!

[@jasontexter1721]

Install a ball valve in your discharge 😂😂

[@nightone9720]

Hey Chris, great video. I saw rhat you use the 56% silver solder roll. What kind of flux do you use? Do you use high temp flux for silver soldering? I always get confused when looking at what flux and solder to use when brazing dissimiar metals. Thanks Chris

[@HVACRVIDEOS]

I use the staysilv brazing flux

[@randomrazr]

are those new fangle heat pump air conditioners worth the extra cost? over a traditional condensor one

[@handlesarestupidyoutube]

induction magnets. usually mess with probes and wireless

[@cyborgsheep6077]

wow how long have you been uploading 60 FPS videos it looks great!

[@HVACRVIDEOS]

Probably about 2 years now

[@nathang.1744]

1:20-1:31 why did that sound like a compressor that has a engaging reversing valve?

[@thomasmann3560]

Because when refrigerant changes from high to low it hisses, it is the same thing happening in a reversing valve

[@davidc6648]

Can you teach us how you properly charge a refrigeration system please? like a walk-in fridge or freezer.

[@abhijeetchandra4657]

Full sight glass mate

[@wisconsinbush2940]

I wish someone would show me how to pm a refrigeration system to keep the system happy. 1. How to clean the condenser and evaporator coils. 2. We have cotton seed trees, how to make a screen to catch them before the get caught in the coils. 3. What intervals the pm’s are done

[@CallegriaofSoulbound]

1.) Why are you in the industry but don't understand how to clean the coils? 2.)use a roll filter over the coil that has very very little air flow restriction that can be removed after the season. Think like fiber glass medium filters 3.) PM's need to be design to match the manufacture recommended service. Keep in mind most refrigeration system run on critical refrigerant charges and as such can be low on refrigerant from a single attempt to collect SH or SC temperature via pressure, as such many refrigerant manufactures have guides on diagnostic designed to quickly test the system from a start up procedure that prevents accessing the refrigerant pressures. It sounds to me like what you need is to take manufacture training on specific pieces of equipment. Don't take that as condescending. If you want to learn refrigeration you need to be trained by refrigerant producers because "professional HVAC" employees tend to run on rules of thumbs which is a great way to manually destroy a refrigeration system.

[@wisconsinbush2940]

@@CallegriaofSoulbound I'm a maintenance tech that is trying to learn refrigeration systems. I'm in my 2nd semester of HVAC schooling by going to night school that only offers one class a semester that I'm paying out of my pocket.

[@CallegriaofSoulbound]

@@wisconsinbush2940 that explains alot. If your school doesn't teach you how to clean coils you need to get a refund. You should have to know that unfortunately you might only get trained on what you need to know to get the EPA license. But the information I said after that still stands, the best place to learn refrigeration BECAUSE it is not same system to system is from the manufacture. Hopefully you will find a company that pays to send you to training with manufactures. PM's on Air Conditioning system are very basic but refrigerant systems are a different ball game, same field different rules. Learning systems and process ARE important but understanding WHY is the first step and then learning the equipment and all the different forms and tools makes a huge difference. You got some time ahead of you that's why 5 years is a very reasonable expectation to experience in the HVAC field and refrigeration takes a little bit more.

[@kenneth9271]

For the compressor to the left with the pressure adjustment what was done?

[@JP-sd2cw]

I want to know your process of removing those tru blue hoses & hooking up your manifold without losing part of your vacuum?

[@HVACRVIDEOS]

Just valve off the tru blue at the core removers, than attach the gauges and vacuum those down than the vacuum isn't broken

[@stevenhorne5089]

You have some really nice red handled, slip joint pliers, and they look insulated. I've looked for them on your Trutech tools but didn't see them. Can you give me a hand finding them?

[@Joshuatimmons1783]

They are called knipex

[@rat_boy_u]

Also they aren't insulated

[@stevenhorne5089]

@@Joshuatimmons1783 Thank you for your help.

[@stevenhorne5089]

@@rat_boy_u Thank you my friend, I appreciate. Would you happen to know if they are soft jaws?

[@rat_boy_u]

@@stevenhorne5089 they make slip on jaw boots for them

[@RodrigoRamirez-fc5hv]

Is the oil supposed to be at mid point of the sight glass.

[@timothydelgado4907]

2 questions. How comes sometimes when you charge on a refrigeration unit you’ll charge through the high side and and the low side will say -29.9hG? I had this happen on an ice machine and second with 404A can you suck everything out of the drum or does it have it be only liquid

[@Justinstratton11]

the liquid line solenoid is shut as there's no call for the unit to run until he powers the unit back on and there's a call for a cool.

[@timothydelgado4907]

@@Justinstratton11 thanks for the feedback but the weirdest thing is with this nugget ice machine that has a constant ice production : HOSHI FS-1022MLH-C serial: F00076B. There isn’t a solenoid valve. I checked the unit itself, the attic where the line set runs and the condensing unit. I even verified with hoshi tech support

[@Justinstratton11]

@@timothydelgado4907 you have a pump down solenoid valve in that unit which is why it your low side stayed in a vacuum just like in this video. Google that part number and find the wiring diagram. A pump down solenoid valve is the same as a liquid line solenoid valve.

[@RSBot2jar]

I've not seen these rotalocks where you frontseat them and still measure pressure at the ports where the pressure controls are at? Like only compressor pressure I thought.

[@topher8634]

It is compressor pressure. When the valve is front seated the ports are isolated from system. You can tell by the position of the port in relation to the line. You can front seat the suction and pump down then front seat the discharge and you will have just a little pressure. All this is true only if the valves are capable of sealing off.

[@RSBot2jar]

@@topher8634 Ok, so I'm not sure why he's telling otherwise then in the video? Maybe he was mistaken? Or am I just hearing it wrong what he's saying?

[@topher8634]

@@RSBot2jar no you heard right I was thinking the same when he said it. He's just mistaken. Or maybe he had a bad experience with a rotolock that wouldn't seal off and now just assumes it not isolated from the system.

[@chatrkat]

I had to laugh, but not at you or your work. In addition to the TV dishes on this roof is an abandoned Muzak / Mood Media dish with all the blocks removed. That’s a damaged coil in the making, when a severe storm sends that thing into a condenser. Cha-Ching …more money for the HVAC tech. I’m sorry you are faced with a compressor swap when it’s that hot.

[@The98deville]

Would it have been possible to install a different but equal capacity compressor in that rack instead of having to order that one?

[@Bryan-Hensley]

That's what he did?

[@The98deville]

@@Bryan-Hensley I was referring to installing a different brand of compressor that may have been available locally rather than waiting to order that one

[@Etorfason]

When it comes to the pressure control, why not just take the control off from the bellow and attach the new control to the old bellows?

[@bwcnation]

Whats the cutoff psi down there. I typically hit 300 on a mechanical control

[@HVACRVIDEOS]

450

[@mitchell8204]

Why use the fieldpeice recovery machine and not appion g5 twin?

[@Keaghanwood]

I’ve watched his videos for four years and his content is amazing. But sniffing refrigerant lmao….

[@andrewmcdonald4519]

Well done without taking the charge out if you if to do it anyway till compressor change

[@dumptrks]

Lol bro I could have brought the compressor to you!😅

[@ntsecrets]

Seems like something that routine maintenance would have caught and prevented……

[@steveblake8766]

145 thumbs up

[@HappilyHomicidalHooligan]

To make changing pressure controls easier in the future, can you install ball valves to the compressor ports and then the pressure gauge lead to the ball valve? That way, when the pressure control borks, you can just close the ball valves to seal off the system from the leads so you can change them without having to recover the charge and just leave them slightly loose while you crack the valve to purge the air out before doing the final tightening of the lead nut...

[@RodrigoRamirez-fc5hv]

Use Schrader cores and depressors.

[@HappilyHomicidalHooligan]

@@RodrigoRamirez-fc5hv Chris mentioned in the video that the pressure sensors won't accept them so they can't be used there...

[@shawnryan4795]

5th. Question what refrigerant is it running?

[@jssteve119]

I think R404

[@ItsMrAssholeToYou]

IIRC, it's Du Pont.

[@quillita]

Whacking 101

[@HappilyHomicidalHooligan]

30:47 It's a brand new compressor... It bloody well BETTER sound good... 😄😁😆😅😂🤣

[@jordanhenshaw]

If the phases were incorrect it would run backwards and sound horrible. Would not be compressor's fault.