... includes BDF,LZW FD Series,ceiling and floor types to Ammonia and Freon refrigeration system. BDFand LZW series with aluminum pipe and ... fins are chiefly designed forammonia system. And FD series with copper fins and aluminum pipe are ... in the purpose of freon system. Refrigerants: R717(BDF,LZW series), R22,R404a,R507C(FD series ...