Jim just want to thank you for your videos I am a contractor in Trinidad and Tobago and I must say you are a great inspiration for anyone trying to get into this field of work
Nice work Jim. Not much room to work up there but on the plus side at least you were able to stand up to service it. Hope you do a video when you change it over.
+George W 409 and mp39 has worked good, but they are being eliminated shortly, they are HCFCs, they are eliminating HFC too (410a,134a, 404a, 407c) google them, thanks
judging by the serial on the compressor it was changed in 2001 they must of put the R12 back in the system. as newer supermarkets compressors don't have sight glasses but the compressors are in a rack system. and the condensers are outside the rack as some the water heaters are part of the heat reclaim in the racks. the compressors in these racks are either Copeland, Carlyle, or Bitzer. the older ones are easier to work on with no computer controls.
A true challenge Jim, your a fantastic asset to your customers and this industry. I do have a question for you if I may; What is the cost for you to convert the system to a viable alternative?
What was the thinking putting those units up ona wooden deck? I hope they let you put the next unit (s) on the ground. I enjoy watching you. Thanks for sharing your work experiences
Hi, Jim like your videos. It is no wonder the system was going out on Hp. Being an old R12 system wouldn't it be a safer bet to reclaim the R12 then recharge the system with R409 than there will be no need to replace the oil in the comp nor having to replace the liquid line dryer nor TX valve. As you know R134a runs hotter on the reeds because it has a smaller molecule make up then R12 does there for the new reeds would then be harder. My thoughts anyway Jim. R12 is still by far one of the best refrigerants ever made shame it went.
+Jim Pettinato Yeh all the synthetic refrigerants here in Australia are being phased out as well. There are over 130 different refrigerants on the market it is crazy especially when other mechanics don;t label the equipment. 35 years ago when I started in the field we only carried R11 R12 R22 R502 as the main common refrigerants in the field special application required certain refrigerants that we did not commonly use. My name is Bert, by the way, one of my hobbies is building websites that's why you see the owl reading a book as my logo. Keep up the great work Jim
+Read About Anything I use to use R11 for cleaning out burn outs, I started out using R12 and R22, I rember when R502 was the new refrigerant, the good old days, thanks
134a is good for walk-in coolers. Not freezers though. 134a has a hard time with high pressure using poe. But drop in L-oil when possible and customer can afford it.
Maybe one of these days R-290 will take off and will make R-12 look low performance in comparison. Pretty sure DuPont inventing and protecting R12 is what caused a lot of these other refrigerants to be banned, and now it all comes back to the beginning.
Maybe the EPA will back off on doing away with these refrigerants because of the new administration. R12 and 22 were probably the best onez ever in my opinion.
Awesome job! is co2 cheaper than nitrogen? Do customers have a choice when the refrigerant has to be changed over? Do you change the expansion valve as well and do you flush the lines out too?
+A&J Heating CO2 is cheap and convient, no hoses and soap & water. Customers always have the choice. I'll change the expan valve on certain occasions but not always, thanks
Jim, Could you have recovered the R-12, and then just put in R409A. I thought I had read that R-409 was a "drop in" for R12 and you didn't have to even change the oil? Another great educational video! Thanks Woody
+Steve Wood R409 and MP39 both are good replacements, but they are HCFCs and are being eliminated I believe this year, Yesterday I checked the price of each at my supply house and both are selling for over $400.00. R134a and R407c cost $108. R407f is a little more.
2020, reason: "Global Warming" Basically they are dumping alot of refrigerants, 404A, even the new 410/Puron will be gone, as well as 407-C the only real good replacement for R22. If the EPA keeps going down this road, we wont have gas compression refrigeration systems anymore.
+bradley morey take a temperature ? pressure reading on the reciever tank and compare that reading on a temperature / pressure chart until tou find a refrigerant that matches.
+Jim Pettinato Charging it with a bunch of dustoff cans would be theoretically the best solution. I've seen people on youtube used dustoff cans to charge their R12 car AC systems or even more modern R134a car AC systems. Dustoff contains R152a difluoroethane which is a highly environmentally friendly freon that has a GWP of only 120 and it's non ozone depleting. Dustoff cans might even work on central AC or refrigeration systems that normally use R22 or R12 but, just make sure you recover the existing refrigerant, replace the line dryer, and evacuate the refrigerant loop before charging it with R152a for best results.
+hardcooling it all just makes me crazy, what do you tell the customer that last year you changed his R22 walk in over to R 404a, now he's got to change over to 1234yf
I have an old Dehumidifier that the tag says was charged with 500 it currently doesn’t have anything in it because somehow the capillary line snapped off in storage and now it doesn’t run! 😢😢😢😢😢😢😢
I thought R134 was safe for the environment. ? So that means all these cars and hvic's with that type gas will have to be changed over at some point. I remember when R134 hit the market,it was less than a $1.00 a can for recharging a car. Does it really have anything to do with the environment or just greed on the part of the company's producing the gas.?. Thank you Jim.
+Bobby Tectalabyss The HCFC refrigerants (R12,22,502) and the R22 blends(R409,mp39,Hot Shot) all had chlorine that destroyed the protective Ozone layer very upper atmosphere, now we've been using HFC refrigerants (R410a,134a, 404a,407c)that cause global warming, they're starting to restrict those. The replacements are CO2 and butane.
The supposed EPA drop in replacement is a dangerous brew know as 1234yf . Which is gonna be bad if you have a wreck and the refrigeration or air conditioning system is compromised because it’s very flammable
