joseito
Jan 13, 2007, 05:28 PM
Hi friends, I want to know about the retrofit of r-503, in cascade system
hvac1000
Jan 17, 2007, 04:29 AM
You are in the wrong place for that professional question. Sorry but the retro fit of any refrigerant is complex. Look at the honeywell/gentron web site for that kind of information.