Just wanna ask, if the ambient temp inside the freezer is 10*F does that mean I have to increase the pressure to 32.6PSi (using the formula Box Temp-TD) where TD is -10*F, therefore 10*-10*=0*
I appreciate your explanations.. I typically work on large commercial units (15-25hp condensers) or refeer trucks/trailers and your explanations remind me of basics that should never be overlooked!
Indeed, on the side I do alot of reach-in stuff which thats very important, a huge refrigerated warehouse has some different rules with dynamic heat loads due to processing at the time, etc
I actually really like your electrical explanation most, tracing a wiring diagram.. doesn't matter how good you are at reading them, its understanding!
I’ll be washing some of your videos and I have to say that all the other commercial tech refrigeration tech that I follow through you really really simplify. The things makes it easy to understand. I am the same way don’t lie. A lot of technician they go by thumb or just guessing.keep up the good job
Your videos are always great. I enjoy all of them. Can you mention some of the stuff you don’t cover in this video for example. Like before you braised did you pump down or pull the refrigerant. Show better how you got the calculations in the very beginning . Like the Let’s call it 10F Thanks, Big Fan of your videos.
Love the channel! I watch it almost daily! Curious did you go to school to learn your charging procedures, or did you learn everything from a mentor? I've been in the industry for about 7 years now, and I've only learned from other people. The mentors i have had are very smart, but they just get to the pressures they feel is right and leave it at that. They don't even know the technical way to charge, like you are presenting here! I'm starting my own company soon and would love to learn all of the deep technicalities for charging reach in's and walk in's. could you possibly point me in the direction of an online class or a college that teaches this? There are none locally here in Huntsville, AL. They are all centered around residential HVAC. I am dying for more MEAT on commercial refrigeration. Thank you for everything you do!
Excellent find. Looks easy but not easy to find without experience. To braze on the accumulator, a pump down is enough? I presume the accumulator is after the receiver king valve.
Yea, thought it would be at the evap like usual but the detector picked it up. Yes I just pumped down and ran a good vacuum. With the rising cost of refrigerant, this is going to become common practice.
Thank you very much for the informative video I learned from your experience. My question as someone new in this field, how you I get to know the saturation pressures? And do you have a video where you show at length how to do those calculations, because I look like they are important in knowing the running/operation pressures of the refrigerant one is working with in the unit.
This is freaking awesome finally found someone with the formulas. What's the best way to contact you. I need some help in shortening the learning curve.
i’ve seen a guy try to braze on a charged unit… when the joint got past the melting temp of the braze 12 lbs of 410 left the braze joint over the next 20 seconds… he no longer works with us.
Need your help! Walk in freezer R449A low side 35 high side 165 no frost buildup coil not cold enough to close fan delay clicks on unit will not pump down. Even when king valve closed. Scroll compressor 3.5 amps. Ambient 80 degrees , box temp 36. Site glass empty or clear no bubbles. Llt 89 F slt 80F. No heat moving on lines only thing that is hot is the discharge line to top of condenser piping hot and compressor hot. Suction line never gets cold.
First... big fan of your videos I see that you used two different td on your condensers while they were indoors. One was 30td the other was 15td. Seem to be same tube in fin coil. Just curious
What did you do before brazing? Did you pump down to the receiver? Did you purge with nitro while brazing? And after brazing did you do any pressure test or just pull vacuum? Cheers from NZ
It’s sometimes hard to find condenser split temps. Are there any basic rules if there is. Is information? So as an example if you have a 134a cooler do you go with a 20 degree over ambient temperature? Or should it be higher like 30 degrees?
If the feed of the evaporator is law the build up of ice is asymmetrically and to the side that the freon inserts to evaporator first.In your case the ice is in all over the evaporator and the valve is frozen because it's closing dew to liquid refrigerant passing throw the suction and bulp.In your case it seems bad defrost cycle together with much moisture.I propose electronic defrost with tge air always running and solenoid closing for 7 minutes every hour
Just wanna ask, if the ambient temp inside the freezer is 10*F does that mean I have to increase the pressure to 32.6PSi (using the formula Box Temp-TD) where TD is -10*F, therefore 10*-10*=0*. thank you
TD is the difference between your return air temp - coil SST. Not sure why he stated it’s like the super heat. It’s common rule of thumb ( values vary in application med,low temp , air conditioning. Hope this helped!
Low sight glass = low charge (once air flow has been ruled out). Once the full charge is in and pressures are within our calculations, we know that a restriction is not an issue
@@REFRIGERATIONKITCHENEQTECH Thats the best leak detector I have ever used. Unfortunately my company does not provide this because they don't value employee inputs So i stand around and waste time with the garbage yellow jacket detector they give me that goes off on my breath and my fart.
these are rules of thumb, go check out commercial Refrigeration for air conditioning technicians by Dick Wirz. Great book and has all your rules of thumb
4th edition out this year but the basics are all the same. Would like to see you add some discussion about compression ratios to take your lessons to the next level! To borrow Trevor's "let's get a conversation going"!
Jesus Christ man do you really take all the extra time doing all that extra nonsense every job??? Why don’t you just get to work and fix the thing already? Seriously I couldn’t imagine all the unnecessary time for labor you charge these poor people for. My God. I coulda done that in like 15 mins. Guys like you make me tons of money 👍 😂
As a refrigeration tech, I must say I appreciate your break down with the math and how you figured out the issue
Just wanna ask, if the ambient temp inside the freezer is 10*F does that mean I have to increase the pressure to 32.6PSi (using the formula Box Temp-TD) where TD is -10*F, therefore 10*-10*=0*
I appreciate your explanations.. I typically work on large commercial units (15-25hp condensers) or refeer trucks/trailers and your explanations remind me of basics that should never be overlooked!
That’s some big equipment. Fundamentals are key to not overthinking the problem. Once you rule all of that out, then start to think outside the box.
Indeed, on the side I do alot of reach-in stuff which thats very important, a huge refrigerated warehouse has some different rules with dynamic heat loads due to processing at the time, etc
I actually really like your electrical explanation most, tracing a wiring diagram.. doesn't matter how good you are at reading them, its understanding!
Great video! It’s a matter of an experience, great tools used and a luck to spot such a little leak!
The best.
I don't deal with cold side but still enjoy your videos.. Like the way you simplify the troubleshooting. 👍
Thanks!
I’ll be washing some of your videos and I have to say that all the other commercial tech refrigeration tech that I follow through you really really simplify. The things makes it easy to understand. I am the same way don’t lie. A lot of technician they go by thumb or just guessing.keep up the good job
Good to see that you found and fixed the leaks. I just saw video of different company just charged then invoice customer.
😬
Your videos are always great. I enjoy all of them. Can you mention some of the stuff you don’t cover in this video for example. Like before you braised did you pump down or pull the refrigerant. Show better how you got the calculations in the very beginning . Like the Let’s call it 10F
Thanks, Big Fan of your videos.
thank u for explain how to find out the proper charge . the way u explain is easy to understand .
I wish we saw the box reach temp, that’s the most satisfying feeling when you get the job done lol
That's what we call the juice of refrigeration 🎉thank you for the good explanation 👍
Lol
Another fine job 👍👍👍
👍👍
Love the channel! I watch it almost daily! Curious did you go to school to learn your charging procedures, or did you learn everything from a mentor? I've been in the industry for about 7 years now, and I've only learned from other people. The mentors i have had are very smart, but they just get to the pressures they feel is right and leave it at that. They don't even know the technical way to charge, like you are presenting here! I'm starting my own company soon and would love to learn all of the deep technicalities for charging reach in's and walk in's. could you possibly point me in the direction of an online class or a college that teaches this? There are none locally here in Huntsville, AL. They are all centered around residential HVAC. I am dying for more MEAT on commercial refrigeration. Thank you for everything you do!
Great troubleshooting on this one 👌
🙏👊
how do you find your evaporators TD is it always your superheat or is that just a ruff guide?
holy hell I'm glad I found your channel! Subscribed!
Ha thanks
Excellent find. Looks easy but not easy to find without experience. To braze on the accumulator, a pump down is enough? I presume the accumulator is after the receiver king valve.
Yea, thought it would be at the evap like usual but the detector picked it up. Yes I just pumped down and ran a good vacuum. With the rising cost of refrigerant, this is going to become common practice.
Best hvac jobs
Another great video! True professional👊
👍👊
Thank you very much for the informative video I learned from your experience. My question as someone new in this field, how you I get to know the saturation pressures? And do you have a video where you show at length how to do those calculations, because I look like they are important in knowing the running/operation pressures of the refrigerant one is working with in the unit.
Yes I have video on pressures and saturation temperatures
The pressure is td over plus ambient for high and case setpoint plus td or superheat but how do I know my units td is my question
Bro your amazing!
Lol, thanks
Professional work! Thank you for sharing. I liked your video.
Great video. Thank you.
This is freaking awesome finally found someone with the formulas. What's the best way to contact you. I need some help in shortening the learning curve.
Lol, unfortunately I don’t have time to train anyone other than my tech team.
Nicely Done 👏
👍
Nice video,I'm curious were you able to braze it with the charge in the unit,or you had to recover it?Thanks
Pump down, braze, vacuum, no recovery. With the rising price of refrigerant, this will become common practice IMO.
i’ve seen a guy try to braze on a charged unit… when the joint got past the melting temp of the braze 12 lbs of 410 left the braze joint over the next 20 seconds… he no longer works with us.
What’s the name of your leak detector?
👍💪🇺🇸❄ nice. Habs #1 pick. Flyers fell to 5. Freaking jersey jumped us.
Lol, yea we got it. Cheering for the panthers since you put Giroux back on my radar but not looking good for them.
@@REFRIGERATIONKITCHENEQTECH not lookin good for Florida
Like the way you do the troubleshooting, thank you very much for your teaching, wandering what brand is the leak detector you are using thank you.
Dtek 3 and H10 pro and my some current ones I am using
Hi , quick question . what's the condenser split in an outdoor condensing unit?
That was awesome but I have a question does 404a have an exact working pressure , if yes witch are those
How do you get the condenser split, what is the number
What program is that you’re using?
Need your help! Walk in freezer R449A low side 35 high side 165 no frost buildup coil not cold enough to close fan delay clicks on unit will not pump down. Even when king valve closed. Scroll compressor 3.5 amps. Ambient 80 degrees , box
temp 36. Site glass empty or clear no bubbles. Llt 89 F slt 80F. No heat moving on lines only thing that is hot is the discharge line to top of condenser piping hot and compressor hot. Suction line never gets cold.
Hey boss, how did you get the TD temperature and the 30f to add to ambient
How do you find the units evap and condenser td?
First... big fan of your videos
I see that you used two different td on your condensers while they were indoors. One was 30td the other was 15td. Seem to be same tube in fin coil. Just curious
How did you figure out the 30f condenser split, on the other video you used 15. Is it based on system specs or something else?
3F = 26.2
Current 12 psi for low side, so how it gets 3F ???
How can you tell the difference between a low charge in sight glass and seeing flash gas’s due to fluctuations of Blended 404 refrigerant?
What is current box temp?
What did you do before brazing? Did you pump down to the receiver? Did you purge with nitro while brazing? And after brazing did you do any pressure test or just pull vacuum? Cheers from NZ
It’s sometimes hard to find condenser split temps. Are there any basic rules if there is. Is information? So as an example if you have a 134a cooler do you go with a 20 degree over ambient temperature? Or should it be higher like 30 degrees?
If the feed of the evaporator is law the build up of ice is asymmetrically and to the side that the freon inserts to evaporator first.In your case the ice is in all over the evaporator and the valve is frozen because it's closing dew to liquid refrigerant passing throw the suction and bulp.In your case it seems bad defrost cycle together with much moisture.I propose electronic defrost with tge air always running and solenoid closing for 7 minutes every hour
I have a question.is overcharged walk in freezer with an 404a can cause same problem? The problem is that can’t get lower 0 degrees.
What is the procedure to do that type of welding?
Just wanna ask, if the ambient temp inside the freezer is 10*F does that mean I have to increase the pressure to 32.6PSi (using the formula Box Temp-TD) where TD is -10*F, therefore 10*-10*=0*. thank you
Hello sir , how you find exact condenser split , sometimes it’s 15 and 30
did it recovery before he doing the soldering.
What exactly is your "TD" and how did you get 10 as your #? Thank you for any help. I believe its the only part of this equation I don't understand
TD is the difference between your return air temp - coil SST. Not sure why he stated it’s like the super heat. It’s common rule of thumb ( values vary in application med,low temp , air conditioning. Hope this helped!
Did you just use the pt per what refrigerant it was..?
Yes, they all have a different PT value
@@REFRIGERATIONKITCHENEQTECH each Evap? Where did you get the info to pull the pt chart up id like to use this method
What ever refrigerant the system is using, you will need to use the corresponding PT chart
Does the restriction also cause bubbles in the sight glass and lower pressures? How did you rule out the restriction? Thanks, great vid
Low sight glass = low charge (once air flow has been ruled out). Once the full charge is in and pressures are within our calculations, we know that a restriction is not an issue
Depends where the sightglass is located. If it is after a liquid drier that is restricted, yes it will.
@@Brisket9392 thanks
what kind of leak detector youre using ?
Dtek 3
@@REFRIGERATIONKITCHENEQTECH Thats the best leak detector I have ever used. Unfortunately my company does not provide this because they don't value employee inputs So i stand around and waste time with the garbage yellow jacket detector they give me that goes off on my breath and my fart.
🤣
Is that an app
What is the name of the formula you use called so I can look them up and use them myself?
Not sure there is a name, just a formula that I use. I subtract the evap td and add the Condensor split
@@REFRIGERATIONKITCHENEQTECH I love the formula you use, it makes it so simplified
these are rules of thumb, go check out commercial Refrigeration for air conditioning technicians by Dick Wirz. Great book and has all your rules of thumb
@@EverythingHVACR haha I just looked on my shelf and I have the 2nd edition of his book 🤣
4th edition out this year but the basics are all the same.
Would like to see you add some discussion about compression ratios to take your lessons to the next level!
To borrow Trevor's "let's get a conversation going"!
Shoulder it's not caulking. you need to get the solder inside the joints
I would rather something be bad , defrost timer, pressure switch I don't care what it is, than to have to trace down a leak lol.
Lol, it seems lately all I do is look for leaks
Jesus Christ man do you really take all the extra time doing all that extra nonsense every job??? Why don’t you just get to work and fix the thing already? Seriously I couldn’t imagine all the unnecessary time for labor you charge these poor people for. My God. I coulda done that in like 15 mins. Guys like you make me tons of money 👍 😂