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Hello. I have an old vending machine /water chiller.
It is working fine but cooling capacity is a bit low.
I wonder is it possible to refill the compressor whit new
refrigerant ? Compressor is danfoss sc10b and is using
R12 refrigerant. Is there a direct replacement for this ?
My friend has a llicence to change gas but I am not sure
which gas to use. I dont want to scrap the whole thing.
Thanks if you can help me.
It Depends whats available where you are.
normally i would use R409a here in the UK but there other options.
Regards
fatboy
Quote:
Originally Posted by krjalone
R401a, R409a are good straight drop in refrigerants.
Cheers taz.
I personally think that R409a is the best Drop in - If your friend has a license to change gas then I am surprised that he didn't know this:confused:? If your friend is a gas engineer then he would handle gas in boilers, Gas Ovens etc, and wouldn't have the type of gas used in Refrigeration. Although it may be different in Finland.
:cool:
Used FX 56 (409A) in both hermetic (Unite Hermetique compressor) with an air-cooled condenser, and open systems (York a\c compressor) with a water cooled condenser, both with mineral oils.
My girlfriend in Sweden had her restaurant food freezer system, using a Bitzer open compressor and a water-cooled condenser, changed from R12 to R404A but there has been a very small but persistent oil leak from the shaft seal since then.
Steve
Canada has a wonderfull gas called R-414b, good stuff if you can get it. I don't think that its available in the USA, but maybe in Europe?? Beauty Blend.
Quote:
Originally Posted by taz24
Generally the R-12 systems I have seen converted to R-401a have been fairly low temperature things.
DuPont's web site
http://refrigerants.dupont.com/Suva/.../suvamp66.html
suggests temperatures for that conversion well below freezing.
R-414b is known as 'HOT SHOT' here in the US. But I find that R-414a works better than R414b. In fact if you do warranty work for Whirlpool's non 134a systems you are required to use R-414a. this is on Whirlpool household Refig. & Freezers. I also use it in Auto A/C instead of retrofitting to 134a. Plus you only use 80% as compared to R-12.
Quote:
Originally Posted by VS-41
That’s odd!! 414a was mostly used in automobile A/C, where you buy that stuff?
414b is available everywhere in the US, I been using the stuff for years as drop in r-12 replacement and it works great.
We use mainly sp34e here, which is 97% r134a and 3% propane. The propane means a decent mix and return of the mineral oil. This means it's fairly cheap and easy to get.
R-414a is sold as Whirlpool's brand name with the 'FSP' . I can get it in 12oz. cans or 25lbs. jugs. I get it at 1st Source parts Servell.
U can use R409 gas , without charging compressor oil or Exp Valve but about the pressure .........!!!!!!
what about r49 or r413a