How to convert an AC system from R-12 to R-134 system continued. To charge the
new R134 system in general 5% less Freon will be used as the proper charge.
Sometimes in cases of extreme cooling a larger displacement condenser can be
used or a cooling fan may need to be added. The above chart can be used to
determine the amount of oil needed for a orifice tube or expansion device based
system.
