Excellent video! I’ve been in the trade for 13 years, I work on everything from basic residential type units to chillers. I’ve never had the desire to work on racks, but I’ve always been fascinated with them. You supermarket mechanics are a different breed HVAC.
That R449 is very unforgiving when people don't use proper practices, such as pulling good vacuums on circuits , and purging with nitrogen. Great video, I really enjoy your channel, Thank you for posting.
A great example of a manufacturers not being the one to change the driers in the field so why care where they mount them. Nice job getting in that space and brazing in that straight pipe.
That’s one reason l got out of servicing Supermarkets did it for 6 years this video reminds me why l don’t do that work anymore used to run service all day & all night .
Those filter driers were in a bad spot!! Good work, I hate those little driers on cases... I always try to remove them too. High water capacity driers RCW-48 work really well for moisture in racks, that and an oil change. Then let it run for a few days and replace the driers and oil again... Can't believe u unsweat the driers your going to containment the hole system 😂🤣😂🤣😆!
Rookie refrigeration I work on residential hvac I want to start doin refrigeration but everyone wants experience . Do you have any tips how to get hire and get paid a decent money? I been watching all your videos so definitely I have experience by now 😆
armando lopez Unfortunately this is one of those things where you actually that have experience, or you can go in person to a company and show them you have the initiative and the willingness to learn
armando lopez It really depends on the manager on site, but sometimes you develop a good relationship with certain managers that they will always hook you up, LOL
One of those units is like a self-fulfilling prophesy, to be able to run it into a vacuum and suck in water. Once the failure cycle begins, it can only get worse ? Is there a low pressure cut out ? You wouldn't thing R-407 would ever suck into the vacuum regions, but if one unit is calling after the others are satisfied -- what is a big compressor to do ? Unbelievable, but what else could it be ?
@@rookierefrigeration4357 Then the oil must be breaking. Refrigeration is one of the best machines man can build -- cause in theory no contaminants can get in.
@@rookierefrigeration4357 Well I looked into it a bit further : If TXV has a leaking seal on the adjustment or the power head, and TXV is partly plugged, venture effect could pull as much as 24 inches mercury (or -12 psi) lower than suction line if fluid pressure is high. That is something a defective TX valve could do. I say 'could do' as part of "a freak occurrence" not very likely but a possibility if power head or cap was loose. Of course it would likely 'never happen'. But on the other hand "anything that can go wrong will go wrong" eventually at some time. Of course the evidence is acid related sludge seizing the mechanism in this case :)
What would cause so many to go down at one. Seems strange. So now that they are drier free what’s going to protect the compressor❓ couldn’t you put a drier in a better place ❓ I’m not an a/c tech the question are real not busting any bodies chops.
Gene Miller they were already having trouble and getting plugged. This rack down call just gave them the knockout punch. It happens when racks go down. All the problems that have bell been floating under the radar all b of a sudden come up. 😂😂
Bet that was warm on the finger... Could have been worse though, set the torch down and end up burning yer biscuits. I can kinda understand the dryer's out there if a compressor blows but at the same time there should be a dryer after the compressor at some point to catch that and there are already filters on the txv's but why would they bury the liquid line in the bottom and put the suction line on the top like that? Any of the lines that have something that can be replaced should be as accessible as possible cause if it can go wrong it will.
Yeah it was definitely warm. Lol. There’s a set of driers on the rack and for some reason we always have them at the cases. We always cut them out though. Lol
Yo man good vid! @ 8:15 you said that you were going to pull a vacuum then pressure test. Just wanted to know what the purpose is behind a vacuum before pressure test, I've always pressure then vacced. Is this something you do only on rack systems? Cheers! :)
Daniel Farrar yes bro. Let me give you a scenario. 1. Pressure test with nitrogen. Suction ball valve is not holding. Now you contaminate 1000lbs of refrigerant with nitrogen. BAD!!! 2. You pressurize with refrigerant from Rack. You verify no leaks. Now you have to dump that refrigerant because it’s contaminated with moisture. BAD!! 3. You pull a vacuum. Then pressurize with refrigerant from Rack. If you have a leak, you can pump the circuit down again and not introduce moisture to system. And you will have minimal loss. GOOD. that is why I pull a vacuum First. This is when you REALLY must trust your brazing. I hope this clears it up for you.
One drier fine, two driers ok. Three drier holdem up haus. Lets start thinking about this thing again especially if none of the strainers were dirty 🤔. But ive been there before 😂. And it really sucks afterwards. ✌
Never put nitrogen in an active rack system.You run the risk is contaminating hundreds of pounds of refrigerant being protected by a bunch of Valves that may be leaking by. Then you really have problems.
You can try using a PT chart on a tank. Or inside the condenser valve off. But If you don’t have any data or info from the txv power head then it’s very difficult. Probably just pull the gas, change the Txv and add virgin refrigerant.
Rodrigo Bravo yeah. I would honestly call my supervisor and put the call in his court. That way you can cover your ass. Bring me it up to the customer. Always cover your ass though.
Contaminated the system by sweating a drier out, good greif. Can't control your circumstances. Get the job done and get the product cold. Screw proper procedures.
Also beads from filter drier can break off and cause debris in txv this material has moisture in it that was absorbed. This causes txv to get stuck. I heard this can also happen from the big filter drier on rack plugging txvs
GamblerMarco yes, I completely agree with you. I could’ve opened the valve and cleaned it but I had the valve in the truck. So. Less time to just replace.
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Excellent video! I’ve been in the trade for 13 years, I work on everything from basic residential type units to chillers. I’ve never had the desire to work on racks, but I’ve always been fascinated with them. You supermarket mechanics are a different breed HVAC.
Rey Rodriguez we fake it till we make it. 😃😃😃😂😂🤣
ESO! 🤣
You're awesome 👌 bro
do you always pulldown the rack to under 1000 microns? or is there a different number like 2000
Nice job and video
Great job
That R449 is very unforgiving when people don't use proper practices, such as pulling good vacuums on circuits , and purging with nitrogen.
Great video, I really enjoy your channel, Thank you for posting.
Thanks bro.
Great video!
Good job
Enjoying the videos.....definitely I’m learning a lot 👍👍👍👍👍
A great example of a manufacturers not being the one to change the driers in the field so why care where they mount them.
Nice job getting in that space and brazing in that straight pipe.
Yes sir. Agreed.
all that shit is filled with processed food so temps don't matter
Thanks for the video..
I would wish to get your help
Please do some videos on rack subcoolers
Jobs like that followed by another service call cause lot of techs to burn out.
That’s one reason l got out of servicing Supermarkets did it for 6 years this video reminds me why l don’t do that work anymore used to run service all day & all night .
Real good video. Keep up the good work 👍🏽
Thank you bro
Oh what fun it is to be a HVACR technician
Those filter driers were in a bad spot!! Good work, I hate those little driers on cases... I always try to remove them too. High water capacity driers RCW-48 work really well for moisture in racks, that and an oil change. Then let it run for a few days and replace the driers and oil again... Can't believe u unsweat the driers your going to containment the hole system 😂🤣😂🤣😆!
😂😂😂. I know right. Yeah we’re doing high acid driers and then again in 7 days
Dope work bro enjoy watching ur videos🤙did a lil split install in a nursing home today out here in az burned my finger too mufker hurt lol
Lol. Sucks bro. Not paying attention 😂😂
This why they teach us to wear our stuff dude
Why txv get gum up? thank you
Julio Chavez contaminated systems build up wax. That’s what guns it up.
Dude you probably went home and drank alot of vodka after doin that all day
Lol. I had a few beers. 😂😂
Rookie refrigeration I work on residential hvac I want to start doin refrigeration but everyone wants experience . Do you have any tips how to get hire and get paid a decent money? I been watching all your videos so definitely I have experience by now 😆
armando lopez Unfortunately this is one of those things where you actually that have experience, or you can go in person to a company and show them you have the initiative and the willingness to learn
Rookie Refrigeration thank you! keep up the good work. Quick question do u guys get free food when you go in restaurants to do work ? Lol
armando lopez It really depends on the manager on site, but sometimes you develop a good relationship with certain managers that they will always hook you up, LOL
Rookie Refrigeration nice 👍🏽 you and hvac/r videos make the best content in this field . I feel like I’m in class keep making videos
armando lopez thank you bro. I appreciate the kind words
Like the content
Good video brother
Thanks bud.
Been there done that
You need to get them coopers for them hard to get pipes bro.
Jose Magallanes company don’t love me that much 😂😂😂
Rookie Refrigeration I’m saving up my Barsco bucks bro. Give me time lol
One of those units is like a self-fulfilling prophesy, to be able to run it into a vacuum and suck in water. Once the failure cycle begins, it can only get worse ? Is there a low pressure cut out ? You wouldn't thing R-407 would ever suck into the vacuum regions, but if one unit is calling after the others are satisfied -- what is a big compressor to do ? Unbelievable, but what else could it be ?
Nope. Too many safeties to go into a vacuum.
@@rookierefrigeration4357 Then the oil must be breaking. Refrigeration is one of the best machines man can build -- cause in theory no contaminants can get in.
@@rookierefrigeration4357 Well I looked into it a bit further : If TXV has a leaking seal on the adjustment or the power head, and TXV is partly plugged, venture effect could pull as much as 24 inches mercury (or -12 psi) lower than suction line if fluid pressure is high. That is something a defective TX valve could do. I say 'could do' as part of "a freak occurrence" not very likely but a possibility if power head or cap was loose. Of course it would likely 'never happen'. But on the other hand "anything that can go wrong will go wrong" eventually at some time. Of course the evidence is acid related sludge seizing the mechanism in this case :)
What would cause so many to go down at one. Seems strange. So now that they are drier free what’s going to protect the compressor❓ couldn’t you put a drier in a better place ❓ I’m not an a/c tech the question are real not busting any bodies chops.
Gene Miller they were already having trouble and getting plugged. This rack down call just gave them the knockout punch. It happens when racks go down. All the problems that have bell been floating under the radar all b of a sudden come up. 😂😂
Good job, I Know thats ruff I do it to.
Thanks
Those refrigerators are not service friendly 🙄. I wonder that they were thinking when they buried those components below those pipes 🤦🏻♂️
Bet that was warm on the finger... Could have been worse though, set the torch down and end up burning yer biscuits.
I can kinda understand the dryer's out there if a compressor blows but at the same time there should be a dryer after the compressor at some point to catch that and there are already filters on the txv's but why would they bury the liquid line in the bottom and put the suction line on the top like that? Any of the lines that have something that can be replaced should be as accessible as possible cause if it can go wrong it will.
Yeah it was definitely warm. Lol. There’s a set of driers on the rack and for some reason we always have them at the cases. We always cut them out though. Lol
Cool videos bro! Just need to do something about your audio in your van, we can barely hear you
Good video
Wow 134 comments 👍
Why not just take a mini cutter to remove the dryer. On nvm I see
Good job like always bro
Thanks
Good shit bro🤘🤘
Can you remove those dyers and just straight pipe it if only your txv has a inlet screen..
I’m not sure. At that point I think I’d try to get some serviceable strainers and burn them in before the txv. Good question
@@rookierefrigeration4357 They say those dryers are there at the time of startups and when they plug up they delete them
Carlos Cervantes yes. That’s exactly right
@@rookierefrigeration4357Got it and that txv you think moisture was stuck there and can you get rid of it by tourching it up?
Carlos Cervantes yes. Once we did that the valve started feeding. Lol
Yo man good vid! @ 8:15 you said that you were going to pull a vacuum then pressure test. Just wanted to know what the purpose is behind a vacuum before pressure test, I've always pressure then vacced. Is this something you do only on rack systems? Cheers! :)
Daniel Farrar yes bro. Let me give you a scenario.
1. Pressure test with nitrogen. Suction ball valve is not holding. Now you contaminate 1000lbs of refrigerant with nitrogen. BAD!!!
2. You pressurize with refrigerant from Rack. You verify no leaks. Now you have to dump that refrigerant because it’s contaminated with moisture. BAD!!
3. You pull a vacuum. Then pressurize with refrigerant from Rack. If you have a leak, you can pump the circuit down again and not introduce moisture to system. And you will have minimal loss. GOOD.
that is why I pull a vacuum First. This is when you REALLY must trust your brazing. I hope this clears it up for you.
@@rookierefrigeration4357 Yes that's a great explanation, thankyou!
Why put a drier where it's impossible to get at
Because engineers
@@rookierefrigeration4357 insanely stupid. If they want driers in the case use flare just before txv so it's serviceable
Roy Amberg I wish every engineer could read your comment.
Best safe & healthy !!
Great job. Manufactures certainly don't give a shnit (《yes, intended spelling) about us techs. And future service.
Yes sir. 100
Thinking you need to carry a cot on the van bro!
Lmao. On a serious note, I was thinking about hanging a hammock inside. Like no joke
@@rookierefrigeration4357 i've done it. a little nap in a hammock goes a long way
Those driers were designed not to replaced
Serious question: Why do you guys take out the driers in those cases.
Because the rack has driers. And the txv have screens. They are not necessary
@@rookierefrigeration4357 oh okay so when you have the system pumped down is it pretty standard to know you might as cut drier out?
Well*
Yeah. If we pump it down and are already working on it. They come out
One drier fine, two driers ok. Three drier holdem up haus. Lets start thinking about this thing again especially if none of the strainers were dirty 🤔. But ive been there before 😂. And it really sucks afterwards. ✌
What was the original call for? Big leak?
ian marthinus yeah, the guys overnight had a low liquid level alarm.
Where’s the nitrogen, 😂😂😂😂😂🤣🤣🤣
RefrigerationTech 🤣🤣🤣. In the van.
I just tell them it was there you just didn’t see it, 🤣🤣🤣
Whats the point if they're just gonna vaccum again
@@prettycureforever7102 flowing nitro prevents oxidation inside copper
Never put nitrogen in an active rack system.You run the risk is contaminating hundreds of pounds of refrigerant being protected by a bunch of Valves that may be leaking by. Then you really have problems.
Wut up Rookie? I got a question. How can I figure out what refrigerant is in a system if there is no data tag or no label on a txv?
You can try using a PT chart on a tank. Or inside the condenser valve off. But If you don’t have any data or info from the txv power head then it’s very difficult. Probably just pull the gas, change the Txv and add virgin refrigerant.
@@rookierefrigeration4357 so I would be taking a shot in the dark of getting it right by using a refrigerant that MIGHT be correct?
Rodrigo Bravo yeah. I would honestly call my supervisor and put the call in his court. That way you can cover your ass. Bring me it up to the customer. Always cover your ass though.
@@rookierefrigeration4357 thanks for your feedback.
Rodrigo Bravo check your compressor M# that will tell you what type (s) of refrigerant the compressor is is compatible with . Oil being a big factor
Contaminated the system by sweating a drier out, good greif. Can't control your circumstances. Get the job done and get the product cold. Screw proper procedures.
Exactly bro. Some people don’t understand.
👍👍👍
Bad piping design on those cases.
Ga Na 🤷♂️
hot fingers, hot fingers, hot fingers! ouch and lol....
throttle bottle lmao. It hurt.
Great brazing results in a terrible location!
Retread thanks.
Any clues how moisture got in the system??
Yes. People not pulling vacuums 🤷🏼♂️
More resent, when and after the discharge line rupture
Also beads from filter drier can break off and cause debris in txv this material has moisture in it that was absorbed. This causes txv to get stuck. I heard this can also happen from the big filter drier on rack plugging txvs
Torching txv with map gas quicly helps get rid moisture or very hot water.
@@jarrodmcdermott9109 that doesn't get rid of it it just moves it around sytem.
Were you the guy I met in Matt's office?
Thomas Espinoza 🤷🏼♂️
#256 thumb up
Mucho bueno
Rack has moisture issues, so remove the driers?
That’s just step 1. Many more procedures to come
GamblerMarco yes, I completely agree with you. I could’ve opened the valve and cleaned it but I had the valve in the truck. So. Less time to just replace.
And non condensable test!
Long ass day....