R12 drop-ins

Hi All, I need to replace a compressor AJ4492A and have been told a CAJ4492A will do the job, does the C stand for Capacitor?? and will it do the job? the next question is this degreaser ran on R12 now which drop-in is the correct one to use, I have been told isceon 49,134a, 413a, R406a,R401a,R414b?

Can anyone clarify?

Regards

AZA

49 is verry succesfull option, 401a second for med temp, R-401b is low tem.

R409/49

Regards PP

Hi Aza

C or no letter = single phase eg AJ/CAJ etc
T = three phase eg TAJ,TAG,TAN etc

Jon

I'd go for R413a never had any problems.

Thanks for the help guys:)

Is there some reason I should Not be using R-414B as a drop in for R-12 ?

PHM
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Hi AZA,
yes C does basically stand for capacitor start...High Starting Torque.

ECM

hi i have just put in 134a in a bottle chiller and its still going 5 weeks later happy days.

Quote:

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Originally Posted by PoodleHeadMikey

Is there some reason I should Not be using R-414B as a drop in for R-12 ?

PHM
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ICOR seems to be hated , because the sales rep, in this forum and the other, but, I have had great success in the medium temp applications. Not so good in low temp, just do to the fact that to obtain a solid column of liquid to the txv you end up with really high subcooling. Seems to throw the unit off when it has a big load.

The guys at my shop are sold on 420a as the only r12 replacement in most systems. I have to admit it does work well but flooding is always a concern.

rs24?.....im using it...seems to work ok?

I have been using 414b for R12 and 134a systems for several years now with absolutly no problems. in a 12 system you only charge to 80% of design and for a 134a system you charge to 90%, or is it the other way around. It's printed on the box...