guitarhvac thanks. I'm at the age where I can fix up anything. But that just means I have a lot of junk. I'll try to get some more videos out. I have some on my camera now.
No Converting a R22 system to R407c 1) I read 95% polyolester oil (POE) and 5% mineral (old R22 oil) is OK. 2) POE oil is hygroscopic that means the oil should be pumped in and the oil can should not be opened to the air. But great work this is almost unknown by local Hvac companies here in DFW Thank You As a Hvac engineer Open compressor via removing the valve stem. Insert a rubber tube down to the bottom of the compressor Suck out 95% the old R22 mineral oil. Pump in new POE oil Re install valve stem. Purge with dry N2. Vac the system Charge with R407c. Pulling the compressor is not necessary. The above is a really Low cost Fast way to go from expensive obsolete R22 to low cost R407c
Great video. But after going to all that trouble, new evaporator coil, new filter drier and all the other work, wouldn't you be doing a better service to the customer by just installing a new 410a condenser and coil that comes with a warranty?
@@zachosborne6577 How much cheaper? How is it cheaper long term? What’s the warranty on a retrofit? How old is the unit? Appreciate your comment kid but when that equipment fails in 5 years or less your customer is going to be pissed at you and your company. Now if the customer chooses to go the retrofit route fine. It’s just not what I would recommend or feel good about.
Yes cheaper, don’t try to insult me dick weed. A retrofit is around $1100 and a new system is around $8l-$12k. It’s considerably cheaper and if the person doesn’t have the money to replace it’s a very good investment if you want to be comfortable. You sound like an ass.
I brazed a nice tree on top of my robinair. I had to use silver solder white flux for the brass. However, my dream setup is that Navac vaccume pumps that already have a tree and a built in micron gauge. The main point to running a good vacuum setup is using 3/8 hoses without valve cores. I just fill to 25 psi and "hot install" the cores under positive pressure after finishing vacuuming. Most people use core removal tools. However, those are sources for leaks and restrictions. I also put the micron gauge right on top of the tree and usually vacuum to 80 microns with a tripple evacuation. I sweep with refrigerant in between the vacuums. Total time is usually 30 minutes.
So you use less of r422b than r22? If I have a 10.5 lb system would I put 80% of that? What happens if I have someone doing it and they put in the full 10.5 of the r422b? (explosion)
The enlarged piston size compensates for the increased mass flow rate. Only R407c has identical flow rate. All the other drop in require more flow, and thus are larger hole. it is all in the EPA document. The 10% diameter size is a close approximation to the 20% mass flow increase. www.epa.gov/sites/production/files/documents/Choosing_Right_R22_Retrofit.pdf
is doing a capacity measurement required?? if I have a 5 ton system with 10.5 lbs would I just replace the compressor (I need a new one) and stick in r422b) instead?
Nice job dude!! Would compressor get damaged by adding 422B on top of 22 ? Does it just lose 10% capacity? I understand it is against the EPA codes. I am just asking curiosity. Thanks for sharing your work. Look forward to seeing more videos.
I work in hvac. I have two questions, what is up with drilling our bore hole? I get that it’s to increase flow through evaporator but how do you determine the bit size to drill with and couldn’t you just replace it with a larger orifice instead of drilling? Second question, what if it is a thermal expansion valve? Put a txv sized for a large tonnage system?
Page 17 shows that pretty much all the drop in substitutes need higher flow rates. czcams.com/users/redirect?v=npyYvT2Z1wU&event=video_description&redir_token=0EYb-CGpuWMtd4_Zh8AmwpWveRZ8MTUzNDIxODU4NkAxNTM0MTMyMTg2&q=https%3A%2F%2Fwww.epa.gov%2Fsites%2Fproduction%2Ffiles%2Fdocuments%2FChoosing_Right_R22_Retrofit.pdf
There are so many blends out there. It really doesn't matter which one you use. Just make sure to match the oil. If the blend requires POE oil, make sure you have at least 20% or more POE oil in the system. R427A requires POE. All the blends that have R600a (butane) will work with mineral oil. The small amount of butane will bring the oil back. This EPA document compares all the refrigerant. I have a video on R407c and R422B. I like both of them. www.epa.gov/sites/production/files/documents/Choosing_Right_R22_Retrofit.pdf
Nathans already answered, biggest difference is 427A needs POE the majority of the time, especially with systems that have a vertical rise in the line set.
Nice conversion to R422B. Also nice drill out on orifice.. Thx for sharing knowledge.
Out of all the good techs on CZcams you impress me the most. I'm not a big commenter, but I had to say that. Lol.
guitarhvac thanks. I'm at the age where I can fix up anything. But that just means I have a lot of junk. I'll try to get some more videos out. I have some on my camera now.
Nice job man. I have never drilled a piston or used one with a larger bore and it's always works fine.
No
Converting a R22 system to R407c
1) I read 95% polyolester oil (POE) and 5% mineral (old R22 oil) is OK.
2) POE oil is hygroscopic that means the oil should be pumped in and the oil can should not be opened to the air.
But great work this is almost unknown by local Hvac companies here in DFW Thank You
As a Hvac engineer
Open compressor via removing the valve stem.
Insert a rubber tube down to the bottom of the compressor
Suck out 95% the old R22 mineral oil.
Pump in new POE oil
Re install valve stem.
Purge with dry N2.
Vac the system
Charge with R407c.
Pulling the compressor is not necessary.
The above is a really Low cost Fast way to go from expensive obsolete R22 to low cost R407c
Lot of knowledge
Good job. I have been using 44b and it's being working good for me
This guy knows his stuff
I never thought about drilling a piston.
Great video. But after going to all that trouble, new evaporator coil, new filter drier and all the other work, wouldn't you be doing a better service to the customer by just installing a new 410a condenser and coil that comes with a warranty?
Cannot force someone to buy 410A equipment. Retrofit is considerably cheaper.
@@zachosborne6577 How much cheaper? How is it cheaper long term? What’s the warranty on a retrofit? How old is the unit? Appreciate your comment kid but when that equipment fails in 5 years or less your customer is going to be pissed at you and your company. Now if the customer chooses to go the retrofit route fine. It’s just not what I would recommend or feel good about.
Yes cheaper, don’t try to insult me dick weed. A retrofit is around $1100 and a new system is around $8l-$12k. It’s considerably cheaper and if the person doesn’t have the money to replace it’s a very good investment if you want to be comfortable. You sound like an ass.
Nathan, Can you do a video on your evacuation tree setup? I would like to make one that helps me with evacuation times.
I brazed a nice tree on top of my robinair. I had to use silver solder white flux for the brass. However, my dream setup is that Navac vaccume pumps that already have a tree and a built in micron gauge. The main point to running a good vacuum setup is using 3/8 hoses without valve cores. I just fill to 25 psi and "hot install" the cores under positive pressure after finishing vacuuming. Most people use core removal tools. However, those are sources for leaks and restrictions. I also put the micron gauge right on top of the tree and usually vacuum to 80 microns with a tripple evacuation. I sweep with refrigerant in between the vacuums. Total time is usually 30 minutes.
@@NathansHVAC could you show how you do "hot install". Thanks for the great tips, always learn something new on your channel 🙏👍
Interesting. I would move that micron gauge to a valve core tool not at the pump that way you don't have to go by time and do a decay test
Thank you that ginius
Looking at McMaster for the drill bits is there a specific kind to get. What about the room you used to measure them where can you get that from?
Do you not have to change the oil with 422B
Nathan why did you change the schrader valves? Great video!
I dont usually. The factory recommends though because r22 is absorbed by the neoprene and will have a different wear pattern.
Did you use 80% of the factory charge of R22? Do you remember? It seems to be the norm in some conversions.
So you use less of r422b than r22? If I have a 10.5 lb system would I put 80% of that? What happens if I have someone doing it and they put in the full 10.5 of the r422b? (explosion)
What part of Maryland, I might need your help.
Great info! How did you come up with the piston size?
The enlarged piston size compensates for the increased mass flow rate. Only R407c has identical flow rate. All the other drop in require more flow, and thus are larger hole. it is all in the EPA document. The 10% diameter size is a close approximation to the 20% mass flow increase. www.epa.gov/sites/production/files/documents/Choosing_Right_R22_Retrofit.pdf
is doing a capacity measurement required?? if I have a 5 ton system with 10.5 lbs would I just replace the compressor (I need a new one) and stick in r422b) instead?
That is fine. You won't notice 5% capacity change.
Nice job dude!! Would compressor get damaged by adding 422B on top of 22 ? Does it just lose 10% capacity? I understand it is against the EPA codes. I am just asking curiosity. Thanks for sharing your work. Look forward to seeing more videos.
Not recommended to mix any refrigerants. All guidelines say to remove existing R-22 from system during retrofit.
You can and it works short term. I’ve been told mixing the refrigerant will cause them to breakdown over time.
I heat pump system r22 is r422b best fit? Thx
Is r 422b capatible with nu22b
How is a 66 piston size 10% over 0.059 size piston if this is a 2ton system? Would it not be a 0.0649?
Flow is 10%. Flow is the area of the hole. Also, a piston size chart will show 66 at 28,000 btu and 59 at 24,000 btu for r22.
@@NathansHVAC So i still dont understand where are you getting your 10% bigger piston size info? what math are you using?
I work in hvac. I have two questions, what is up with drilling our bore hole? I get that it’s to increase flow through evaporator but how do you determine the bit size to drill with and couldn’t you just replace it with a larger orifice instead of drilling?
Second question, what if it is a thermal expansion valve? Put a txv sized for a large tonnage system?
Did you add R422B upside down in liquid form?
usually always liquid when the compressor is running. Not too fast though.
How did you come up with 10 per cent larger orfice.
Page 17 shows that pretty much all the drop in substitutes need higher flow rates. czcams.com/users/redirect?v=npyYvT2Z1wU&event=video_description&redir_token=0EYb-CGpuWMtd4_Zh8AmwpWveRZ8MTUzNDIxODU4NkAxNTM0MTMyMTg2&q=https%3A%2F%2Fwww.epa.gov%2Fsites%2Fproduction%2Ffiles%2Fdocuments%2FChoosing_Right_R22_Retrofit.pdf
Your thoughts R427A or R422B? Any oil change required with either? Thanks
There are so many blends out there. It really doesn't matter which one you use. Just make sure to match the oil. If the blend requires POE oil, make sure you have at least 20% or more POE oil in the system. R427A requires POE. All the blends that have R600a (butane) will work with mineral oil. The small amount of butane will bring the oil back. This EPA document compares all the refrigerant. I have a video on R407c and R422B. I like both of them. www.epa.gov/sites/production/files/documents/Choosing_Right_R22_Retrofit.pdf
Nathans already answered, biggest difference is 427A needs POE the majority of the time, especially with systems that have a vertical rise in the line set.
@@NathansHVAC where did you learn all that? 😊
Isnt it cheaper to just replace the ac as well?
And way less time and labor?
They all eventually get replaced.
Than to replace the refrigerant? Seriously?
Any chance you'd post a link to that spreadsheet file?
Thanks but l am not see psig gas pussir and no need oil chang good place show psig purassir