A/C conversion Help

[cubano112266]

Hello Group,

I have the A/C conversion/charger cans ready. I have been reading that I need to evacuate the entire system of the original freon. Can I do this? Is there a piece of equipment that I would have to purchase to perform this evacuation, and how do I dispose of the evauated stuff?

All the help is greatly appreciated.

Regards

cubano112266

[Crvett69]

if it has R-12 in it then you should go to a place that does ac recharging and have the system evacuated. you can get in big trouble for just opening a hose and letting the stuff out. R-12 is fairly expensive and they might suck it out for free to recycle it. if they suck it out then you will also have a vacuum in the system before you recharge it since that whats your supposed to do anyway. call around to different shops and see if anyone will do it for free

[RickMN]

Crvette is right, it is really illegal to vent R-12. Plus, you will have to evacuate the system for almost an hour to get all the R-12 out of it. Any R-12 left in the system will contaminate the R-134. But that's assuming the system has R-12 in it. Is your A/C working right now? If it's low on R-12, it's low because of a leak. If you convert to R-134a without first fixing the leak, you'll be fighting a losing battle. The R-134a molecule is much smaller than the R-12 and it leaks like crazy through any crack it can find. But to answer your question: You will need a vacuum pump and a manifold gauge to do this job properly. You'll also need to add new oil. The old oil is not compatible with R-134a. It can stay in the system, but it will not mix with R-134a.