R12 replacement

[cbslueck]

This might be a stupid question. I am working on a walk in cooler and I wanted to know if I could replace the r12 with r134a and I am wondering if I will have any problems.thanks chris

[hyperion]

You could use one of the drop-in refrigerants R413A or R49. You require to weigh the charge in to about 90% of the R12 gas charge.
The drop in will operate with the mineral oil that ios in the system, whereas R134a is not compatible and could require an oil change in the compressor. R134a can often redeuce the cooling capacity of the system, dependant on ambient temperatures etc.

[Electrocoolman]

Try using R426A - (RS24 over here). Works fine for a walkin.

[Magoo]

R-406A has been my preferred.

[lowcool]

r406a contains r22,sp34e for me

[ekeller]

This might be a stupid question. I am working on a walk in cooler and I wanted to know if I could replace the r12 with r134a and I am wondering if I will have any problems.thanks chris

have to change oil from mineral oil to alkenzene or poe

[FEISTY]

You can use MP39 as a replacement refrigerant. Using R134 will cause you to drain oil and switch to POE oil. You should flush evap coil also if it is a sizable system. There is another choice to use...R409 but I prefer to stay away as it runs a higher head pressure and doesn't work well in high ambient situations. " Fits all " drop-ins have their purpose but most contain butane that, if system isn't purged with nitrogen, can flare up badly when brazing joints.

[Aik]

have to change oil from mineral oil to alkenzene or poe

Rest of miniral oil in system would be less then 5%, preferably less then 1%.

[Fri3Oil System]

If you clean the circuits you can get all MO out, 100%, and then pass to POE without any phases separation problem that could damage the compressor

[Aik]

If you clean the circuits you can get all MO out, 100%, and then pass to POE without any phases separation problem that could damage the compressor

Remove all oil in system is impossible, small percent of iol remain...

[Fri3Oil System]

Yes AIK, 100%, and it's certified

[Grizzly]

Yes AIK, 100%, and it's certified

Hi Frio.
Forgive me for being cynical, but all your posts are related to Fri3oil flushing systems.
Add, that you list yourself as a Communications Manager for Frio3systems.com.
I don't think I am "out of order" questioning your motives?
Are you going to offer free advise like everyone else,
Without peddling your product?
We all have Company biases, but it is preferred if they are left unsaid!
Grizzly

[Aik]

Yes AIK, 100%, and it's certified

Could you tell how is the system can be cleaned ideally, 100% oil moving away?

[Fri3Oil System]

www.fri3oilsystem.com check here, and feel free to contact me whenever you want.

[Fri3Oil System]

Hi Grizzly,

I find myself in a strange position, as I entered this forum to learn a little bit more of refrigeration, and check what are the market worries. As I am not an engineer, I can only give my opinion in questions and matters that I know. It's not my will or my company's to free advertise here, as we spend a lot of money in promotion, marketing, like international meetings, exhibitions, etc.
I just thought you all may like to know that there is now a technical solution to eliminate acids or water from a RAC circuit. Many of you still use nitrogen to work out these problems, and you all know that's not just enough.

I don't want to be too comercial, but what can I do if our product is the only that can deal with these questions...

I will try to be more objective, read more, and write less

[The Red Krawler]

If you want a direct replacement for R12, check out 34M. I believe its a similiar product to SP34E in terms of being mostly R134a with a whiff of butane? propane? added to increase velocity and help with oil return. A bit of sales speak here:

originenergy.com.au/news/article/asxmedia-releases/230

Its more expensive than 134a so depending on the size of your system it 'may' be more economically viable to correctly retrofit for R134a but 34M is literally a drop in - no TX valve change, no oil change, no pressure control settings change.

[AlwaysLearning]

I use R-409 but the charge is only 80-90% but no oil change

[Magoo]

Service techs will need huge vehicles to carry at least 25% of the potential/ possible replacements for what ever.
The world has gone MAD.

[Fri3Oil System]

Service techs will need huge vehicles to carry at least 25% of the potential/ possible replacements for what ever.
The world has gone MAD.

Yeah Magoo,
that's why, ideally, we should go through the comodities, 404A and 407C in the major part of the cases. This way, the logistic is more simple. In the case of R22 I mean.