Back To Replace the headmaster with a full startup of the walk-in freezer with TXV adjustment.
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- Опубліковано 7 лют 2025
- Back To Replace the headmaster with a full startup of the walk-in freezer with TXV adjustment. So many things wrong to list. I demonstrate how I braze, how the headmaster works and how to set up superheat.
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#hvacrsurvival #hvaclife #hvacservice #hvacr #refrigeration #troubleshooting
Thanks for taking the time to check out my latest adventure, keep in mind this job was a few hours and the video was around 90 minutes of footage, I cut a lot of things out to keep the video snappy but still useful. Please consider subscribing and leaving some feedback👍👍 Stay Safe out there!
Nice editing on this one
Thank you for going out of your way to post these. It must take a bit of time, no doubt. Anyways I'm always learning and your channel is fantastic resource for the well versed and the new guys.
@@BrettWae thanks Brett, yes it does take a lot of time, I don't have a video ready for tomorrow so I'll need to rush to get it edited and uploaded tomorrow sometime.
RE: Paper towel for heat block - had a compressor go out in my LG fridge and the guy that replaced it used paper towel. Said it was quicker and cleaner than heat block. Makes sense - as long as it's wet it certainly not going to catch on fire!
Every time I am soldering or watching someone else solder I can hear my grandfather admonishing to heat the metal and not the solder - hehe!
I use paper towels at times when other things won't fit. Nothing wrong with it and it works.
Jim is tha man... learned some old dog tricks from him myself
Hard to not learn something from him.
Awesome I would like to see the alternative superheat method in one of your future videos. First time I hear about the alternative method. 👍
I did it on a video that I made a while back and even covered where in the manual its located. Ill see if I can find it.
Found it!! ua-cam.com/video/yUyj7YHicE8/v-deo.html Watch the whole thing if you would but at 17 min is where I talk about it in the manual.
Great job Rick, that strainer was plugged for sure!
I'm a little apprehensive of what kind of response I will get from this video. So far so good lol, I pretty well broke almost all my personal rules in it.🤣🤫
Jim Pettinato is a great guy ...great video ..tkxs
I learned a lot from him as well👍👍
old school the best way I've been in the industry since 92 i always revert back to old school habits. keep the videos coming
Thanks man, I appreciate it! You started 3 years sooner than I did. Were starting to become the old school🤣👍👍
It is somewhat disappointing that professionals with a minimal assumption of logical thinking criticized Pettinato for the SH method of pipes temperature differential. So here we have a beautiful trifecta: 1) For being right. 2) For proving to be a perfect (sine qua non) method in the absence of a service port. And 3) Because a service manual from a major company confirms this in its literature.
Excellent video Rick, that's a GEM for newbies coming into the trade.
Thanks Juan, it seams to be a common HVAC attitude I believe?
Juan Todolí I miss Jim’s videos.
Pettinato is an excellent example of using common sense and a calm mind to solve complex problems. Some of his methods are self-discovered and in my experience work quite well.
I really miss seeing his videos.
Hopefully he might see these nice comments about him and he would start again, but doubt it. 😒
I use that super heat method all the Time. All credit goes to good old Jim. Thanks for all your vids. Super awesome
Thanks bud👍👍
I'll say most of your videos are great. 1 thing I do is read manual while pumping it down or charging. A little refresher nes r hurts. Great work keep it coming.
Thanks man, I'm getting rusty on my residential 🙄, that's the first Westinghouse I've worked on.
Adding a small amount of water to the heat block makes it easier to work with. Enjoy your video’s!
I will need to try that, I kinda gave up on it. A wet rag seams to work better..lol Thanks for the info!
I like the way you showed how you can get supheat that was realy good
Thanks Steven! I appreciate your feedback!
I used that method all the time and it works like a charm, I fixed so many equipment that the installer missed with that method.
I know the feeling 🙄
Great video Yea I remember watching Mr Jim adjusting sh the way you did today great content thanks
That's where I first seen it to, so I started testing what I learned, sure enough it does work where it's needed. Specially if you don't have smart probes. Jim is a cool dude👍👍
Great info for the green horns 🤘🤘
Very nice video good explanation thats why i like to watch your video's learning every day.
Greats from Holland, Stay save 👍👍
Nice manual by the way
Wow!!! Holland, that's really cool! I've worked on a "humungous" interesting machine that recycled old refrigerators that was designed by a engineer from Holland and was owned by a recycler that was located in Sweden, it was moved here to my little town in Ohio...I met then both while they were setting it up for the new owners. This is so interesting how many people are watching my videos around the world💥 it blows my mind.... Thanks for letting me know your out there👍👍👍
@@HVACRSurvival the world is a small place now a days, refrigiration is sort of the same around here, some differences offcourse C Versus F psi versus Bar enz enz worked with a company with no college who knows a lot of stuff about refrigiration so i see you and a lot of your co tubers as my teachers thanks for that 😁😁👍👍
Lucky for me I have testo gauges, so I was able to switch to those settings but I don't know what the equivalent is of a Bar vs Psig, lol but it got me close. Cheers Mate!
Great video bro. I agree with everything you did. Great explanation at the end👍🏽
K pasa rookie! Thanks man!! I appreciate that, specially coming from the godfather of big boy refrigeration👍👍 I'm trying to start a new live show possibly on Saturday nights, Would you be interested in coming on?
HVACR Survival umm. Maybe. I done see why not. What will we talk about. Beer??🤣🤣🤣
We can talk about important stuff like that🤣👍, or your background ect. Whatever. I would like to do a "get to know who the creators are" video series to start with possibly. Basic interview type questions. I think the viewers are interested in that? Anything you want is fine to.
HVACR Survival that sounds good. I like that idea
I'll get with you on a time and date.
Is jim still doing videos he is the first person I started watching on UA-cam he is also a good teacher.
He hasn't made a video in about 3 years. I tried contacting him but he won't respond. He was also one of the first guys I started to watch as well. The videos were long but if you watched them you were sure to learn something.
Temp to temp is very accurate because it's physics! Measuring temperature at inlet yields "saturation" (75% liq/25% vapor) Saturation minus outlet on suct. line = Superheat. This is EXACTLY how Mitsubishi calculates superheat on their evaporator. Keep up great work, videos are awesome.
You make it sound so official👍👍Thank you Sir!
You earned my respect ✊ solid teaching theses newbies are very fortunate
Thanks Brian, I really appreciate your kind words. I can't think of anything better than someday I met someone I never knew and they say I helped impact there learning process.
We thank you for your effort and educational videos!I keep watching you from Greece!
I try to make it as useful as possible, thanks 4 watching!
I also do the Mr. Jim Pettinato super heat way. Good video, thanks 👍🏻
It works 😁👍👍
Thank you very much for your teaching,Always watching your videos. Tks. God bless
That's awful kind of you, thank you for commenting👍👍
Valuable information Hoss thank you for the review
great video n thanyou for sharing. big fan of jim pettinato but havent seen anything recent from him. i hope he is well. seem like a real nice guy who did honest work. good people. thanks again!!
I fully agree with you👍👍
Reading equipment manuals is something that I mention to my students all the time As a service tech. you can save so much time and guesswork.
Very true, my personal problem is my mind wants the answer faster than my eyes can read it and my mind can absorb it. This causes me so much grief.
Very useful advice and instruction. Thanks for taking the time to help the new guys.
Thanks 👍👍I hope these are some help 🤜🤛
Thank you for your time to make these videos. 👍
Thanks Jay, I appreciate that👍👍
Nice job!! I live in the tropics but not used here alot (headmaster or fan cycle) I remembered 20-30 sh at compressor when you where verifying... And when you mentioned it o said to myself at least I have a good memory!! I miss refrigeration work and stuck to ac and VRF...
Yea, that would be a different life style for me, hot then frozen then hot. Lol, thanks man!
Nice work that plugged screen would explain the short cycling and empty sight glass in the first video............
I made a few stupid mistakes, biggest was not adding more refrigerant sooner. Most systems this size hold maybe 7 or 8 lbs. This pig took 13.5lb🤦♂️ plus I didn't go into details of how some else was there 2 weeks prior and fixed a leak.
Great video and explanation Rick! Videos like this hold the most merit.
Thank you ATR! That's awesome of you to say👍👍
Good stuff man. I for one appreciate your skill set and your willingness to put in the extra work making these video's . Thank You.
I love hearing back from my viewers that it was useful and entertaining. Thanks RJ! It means a lot👍👍
Great video ! That plugged up strainer was a great find wow ! after i saw that i probably would have tried to fit a drier before that Headmaster , when i see shit in a strainer , i know thier is usually more to come , possibly the compressor windings are coming apart ? you will prob be fine for a good while though.
a tip for charging a finniky system , Just fill the Receiver to 80% capacity. the numbers are on the side of that receiver. the that one holds 15 lbs at 90%. so , 14 lbs is 80%. Just put 14Lbs in & your done. its the fastest way when you allready have all refrigerant removed allready. Then write total charge on the receiver in paint marker. it gives u a baseline charge for future work on that system too.
Great video man! Super informative
I appreciate that ACR!👍👍
I remembered doing it old school by frosty patterns also... It's tricky but when in a pinch does fine... Used to work on market reefer and that was bread n butter
Thanks Alexander 🤜🤛👍👍, I felt I really needed to show what I did at the end to explain the reasoning behind some of the things I mentioned. Or face the mobs🤣
Straight forward great video thank again
I appreciate the view and feedback👍👍
Awesome video I just learned something new today. Thanks for taking the time to explain it. 👍
Thanks Jim! What stood out to you?
I second that 'well done" what an awesome video, learn a lot and i going to label my probes i did not because i did not what to use a marker. Thanks
Thanks kuku 215, I love using my label maker, That particular label is a thinner width and has a heavy duty sticker on it.
i was wondering why they did not peel off. I going look for right type of labels, can wait to get it done. Thank you.
@@20315711978 Brother Genuine P-touch TZE-S631 Tape, 1/2" (0.47") Wide Extra-Strength Adhesive Laminated Tape, Black on Yellow, Laminated for Indoor or Outdoor Use, Water-Resistant,0.47" x 26.2' (12mm x 8M),TZES631 www.amazon.com/dp/B004I2KIOY/ref=cm_sw_r_other_apa_i_D67JEbMM5T97W
@@20315711978 that's from my history on Amazon.
That fan motor though!
Great video today !!
Thanks Jack👍👍🤜🤛
Having a 20 degrees superheat out the compressor is outstanding. I have a few installs that it's very hard because the line set is very short
Long refrigerant line runs and ones that are ran above the ceiling are killer👍👍it's amazing how much heat they gain into the line.
i have a rule. 10' Minimum line set. ill Move a unit 10' away from a Hole to Get a Bit of Run.
@@OcRefrig that's a great rule, I had a really challenging system. I ended up putting in a sub cooler to try to get a little more superheat and had to replace the liquid line solenoid. It was a water-cooled condenser at a school district that I work. It would have been on the real massive project to try to put an air-cooled condenser on the roof it was in the dishwasher area underneath the dish rack. The superheat isn't the greatest but it's better with the sub tour in there. This was a low profile low air flow model I had to have in this walk-in cooler. It was a little ceiling about 7 ft tall I was afraid with a regular air flow model I might freeze product
Love your videos, man! You’re always so calm and collected. Always very thorough. How long you been In the trade?
They I'm usually high strung and a lunatic 🤣. I started in 1995 and have migrated from residential, to commercial and trying to get into industrial. But I still do everything in between.
It gets too cold for you guys to do this. But i had a morgue cooler that HAD to be running and the unit had a burnout. Maintenance guys replaced compressor and txv and couldn't figure out why they still had crazy head pressures. I pulled off the head master and about 1/4 of dust and junk and blown out shellac and filter dryer blew out of the lines. Needless to say i had to remove it and didn't even have a fan cycle switch. But it ran just fine over the winter but we only get to 20-25 as the low at night.
🤣👍👍. Yeah that's not very cold.
Awesome videos!!!!❤❤❤❤❤❤
I appreciate that thank you for watching
Good work, good video. Thanks.
Thanks Jim 👍👍
Good video, as an instructor at a local technical college, videos like these are helpful, especially with remote learning. I need to ask what the symptoms were before the repairs and also did the filter drier get replaced during the repairs?
Did you see the video of the first trip there?
Sr thanks for the great information
But I have a question what makes you diagnosed a bad head Master
If I remember correctly it was not feeding refrigerant correctly
Good job!
👍👍💯
Nice video.. Thanks 😀
Thanks for the view! Stay safe out there!
Thoroughly enjoyed the video , mate , very useful information indeed 👍
It kinda makes me wonder though , is it really worth it to have a headmaster , after witnessing how much it throws off the txv when it's bypassing the condenser , I mean , with a proper fan speed control , you can achieve a good enough regulation for the head pressure , I'm guessing it's a cost efficiency issue isn't it ? Although inverter driven fan motors seem to get cheaper so , maybe it's the future ...
I work on chillers that use different voltages to regulate the fan speed , and if the parameters are correctly set up , it does work pretty well, without massive HP swings , but then again , it does require a pretty big transformer and more expensive fan motors so yeah , I guess cost innit !
It cost more in refrigerant when a headmaster is used but it's a steady pressure to the txv, and it generally doesn't wear out, it's killed as you seen in the video.
We use a cutting torch to braze, and no nitrogen, I work on transportation refrigeration we aren't given the time to do it right, gotta get it done fast so my boss can make more money on the next job
That's understandable, I've use a Sawzall to cut copper before 😳 When you're dealing with 2in suction lines and no room to get into it sometimes you have no options.. As you see, we have to make it work in the field. But when you can do it right, that's when you do what you you feel is right.
As always a good job informative video as well . Just a question that Headmaster valve was that a Sporlan LAC valve if it is generally speaking on that particular valve they want a check valve on the line going into the receiver I believe the O R A valves don't require one
Lac-4 I believe, I showed it in the video, I'm fairly sure that is the model number, I did see in the true manual something about a check valve but I believe that is for the two peace head pressure control valves. None of the smaller ones have ever had one that I've worked on.
Well done !!
Thanks, Trent, I'm curious what kind of feedback I get from this one.
Good video brother
Thanks Greg! Have a great weekend and stay safe out there!
HVACR Survival you as well, ready for things to get back to normal
That's a fact!
that is my food right there. thank you for the upload Mr.Rick. so after pumpdown your liquid level was about 70%? i know they cant be over80%.
Yeah I would guess my level was somewhere between 70 and 80%. According to the book the tank can hold 90% of the total capacity. Don't forget, this is dependent on the location of the liquid solenoid, Generally the valve is down at the evaporator which means you can stack a column of liquid all the way down to it but some of our solenoids are located outside which reduces this capacity, Especially if you have a half inch liquid line.
@@HVACRSurvival thanks
I learned if you change compressor check strainer. Over heated compressor discharge valves make black carbon
👍👍 Which strainer in particular? There's several depending on the complexity of the system.
I had a txv yesterday that had a tiny little ball strainer clogged up. But I already purchased the new txv. So I went ahead and replaced the txv any way..
Might as well, that's what I would have done. It always costs more to do it later. 👍👍
Great info!
I appreciate the feedback👍👍
that was a great video for me. Thank you
I have some questions, so just by measuring the temp if the evap inlet and outlet (7), that can give you a pretty accurate estimate on what the evaporater SH? never knew that
also, when would i know when to check condenser SH and evap SH?
why did you recover the charge if you could've just pumped down the reciever? because i noticed you did that when you checked the screen for the TXV
I had to recover it because the headmaster is before the receiver. (You cannot isolate it.) The TXV however is after the receiver and service valve. Your 1st question is correct, yes that is a easy way to get your values when you can't do the traditional superheat method, they recommend you do it the normal way vs the temp/temp method.
Does it matter on which feeder tube you check temp on for that particular method
I don’t fully understand the context of the question. What I did in the video was likely compare the discharge, liquid and recover our ports to determine the difference.
@HVACRSurvival when you checked the evaporator superheat via inlet and outlet of the txv. The alternative method is my question boss does it matter which feeder tube we clamp too.
For those interested he is using a carburizing flame. Avoid a oxidizing flame.
I used to burn a hole through the copper the way the school showed us 🤣. Without looking it up I believe you are correct, it gives you a softer flame and has been good to me for the last 25 years. Thanks 4 watching 👍👍
10:36 and not to mention if just cleaning, would not have seen the clogged strainer.
True, very true👍👍
The ppl in the comment section must be brutal. He really went outta his way to avoid trolls
They can but you have to be ready for it because it will happen. It's a given when thousands of strangers are over your shoulder watching your every move.
@@HVACRSurvival I understand completely. It's a shame. Thanks for all you do on here...
👍👍🤜🤛
he didnt wet the rag with enough water 😡😡😡 i didnt see droplets of water at start
can you solder using a propane torch?
Soft Solder yes, braze not so much
I don't knuw what is the mass you used in the last weld. Whats is it ? T
What?
How do you control compressor superheat without affecting evaporator superheat? And why is that condenser fan motor so oily/dirty?
Compressor superheat overrides evaporator superheat. Unfortunately this is a very short run so you're not gaining any heat between the evaporator and the condenser.in theory most manufacturers require at least 20° to 25° at the compressor.
The motor is probably oily because the seals are leaking out oil and that generally is a sign of a future failure. Keep in mind if they replaced everything I found wrong they would be building a new store. Most places want equipment to run at the minimal cost.
@@HVACRSurvival Never heard of it, we always went for 10 degree evap superheat. That's interesting. You would think all liquid would be gone with 10 degree super heat.
It potentially could change based on outdoor ambient changes, like below zero F. outdoor ambient.
👍 Good info man!
Thanks John🤜🤛👍👍.
Tear long strips from a rag and wrap it tightly around the valve.
Yep, that works good to👍👍
yep, long strips about 1" wide work great.
Hard to believe in the early years of refrigeration they used to use an evaporator with a built in float ball and valve (on some systems) -- an evaporator that looked more like a car radiator with a cavity at the top. -- hence the "flooded evaporator". Fortunately the TX valve was invented, to make for more compact designs.
I've seen the pictures and there is industrial systems that work with those primitive type of designs.
I'm just thinking how much space a TX valve saves.
Stay-Brite 8
That might work too for the (low) side of the compressor but I wouldn't want to test it against the vibration, I'm not big on using it anymore after I learned to properly braze
As Jim would say txv is Hunting
That's what I was always told it's doing when it's stabilizing.
@@HVACRSurvival you wouldn't happen to know what ever happened to Jim? I've learned a lot from him and you
Thank you El, From what I was told he's still working but became burned out from all the Jerks on UA-cam that gave him a hard time when they didn't agree with him. That's a total shame in my opinion. I've tried contacting him through UA-cam and even Google but never got any response.
@@HVACRSurvival though world out there i would imagine. Stay safe
Why did you recover when you could've just pumped it down to the receiver
Lol, our atmosphere is mostly nitrogen, atmospheric nitro purge FTW 🤣.
Did you change the filter drier? You didn’t show it if you did....
Normally I always change it whenever I open a system but because I just changed it 4 days prior I did not, I know... I know... Up on the cross I go. 😕
My bad! I remember this was a return call now. I wouldn’t have changed it a second time either. I was really surprised how dirty that screen was. Often time when I come across a failed headmaster, I leave it and opt for a fan cycling control depending on customer and their budget!
No worries👍👍I fully understand about the fan cycle control. I usually leave it up to the customer also.
Burn hot, burn fast. On and off
Damn straight 👍👍🤜🤛🍺🍺
#75 thumbs up
👍👍👍
Thanks 4 watching!
I agree replace it.
👍👍
We'll look there that's why weed is not good there was a joint inside the unit
I know that's weed abuse. It's right up there with alcohol abuse, AKA spilling the beer👍👍🤣
😂
Better get those fingers registered with the insurance company in case something happens. 👍👍
I'm all paid up👍👍
What ever happened to Jim? Brazing is all about experience, just like all welding. Those joints look great.
People on UA-cam can be real ass wipes. (🤷♂️ 🤦♂️) He finally got tired of being harassed and called it quits. I learned a lot of stuff off of him, I wish he would come back. I was very inspired with all of his knowledge and his ability at his age to crank out the videos like I did. 👍👍
@@HVACRSurvival Agreed. There are a lot of techs that don't want the trade shared with the younger guys and in public. You see it on the forums all the time. Everyone wants to destroy you for getting out there and trying to help a rookie. When I was coming up through the trade years ago there were a lot of techs that were insecure and thought that if you helped a rookie you were training your replacement. It is just not true. Jim taught me a lot. You have also. Always learning.
@@ianpalmer1482 That's the way it was for me. People didn't wanna share anything either because either they didn't know themselves or they were worried they were training their replacement. In this day and age with us so understaffed that is definitely not and was not the problem then nor now. I fight the same battle trying to get into chillers and refrigerant rack systems. That is even more reason why share what I do know.
@@HVACRSurvival I'm glad you share your content. Between you and a few other good technicians on UA-cam I have learned more in the past few years than I did in class or on the job. I still take time to read information not familiar to me. Thanks.
Thanks man, I appreciate hearing that.
That was one pluggo buggo strainer right there , Dave would be proud !
I guess the YT popo got to poor ol' Jim Pettinato before he could pull out the documentation and get acquitted , or at least get a mistrial .
He should sue and get his super tech badge back plus reparations !
Damn strait Sterling, I've tried getting him to reply to me with no success.
Does anyone even know of he's still kicking? Or did he hang up his gauges for the last time.
I noticed he subscribed to me in the last 90 days. Hopefully he'll come up in one of my discussions again and maybe he'll see it and come forward and let us know. From what I heard he might still be working,I believe he got treated badly online.
What?! you read the manual?
NA! I made that up. 🤣 It helps 🤏...I admit, I hate reading, but dam, wouldn't you know it, they tell you how to do it. Imagine that👍👍
Like #233
The gas has all that crap in it....
Short of replacing the whole system, the filter drier will need to do its job.
HVACR Survival Unfortunately I have seen a lot of compressor motor burnouts on large built up systems that could never be “ changed” out. Maybe it’s wrong to do but we never have reused refrigerant that had a hint of being dirty. I understand that customers don’t like to spend money on problems but I have discovered if a system is cleaned up properly the first time an electrical burn occurs things work out for the best. Just my two cents. Every valve I have ever changed after a burn has had a filter/screen plugged beyond repair.
The refrigerant was replaced when another tech made a leak repair a couple weeks earlier. This equipment has been used and abused prior to us starting to do work for this chain. The equipment reminds me of polishing a turd, it's always gonna be a turd no matter how much you make it shine.
List everything that is wrong
You,,,explication very fast,,,,! You change ,,,one things,,to other,,,🤨
I'm Sorry, you can always hit the forward or backwards button on your keyboard to skip 5-15 sec forwards or backwards. If your on your phone double tap forward or backwards will do the same thing.
Uh-oh did someone buy the hilmor tool after all lol?!?? I guess you went to the dark side…
It's not perfect but it is nice.
Great job
Thanks Luis! Have a great weekend!