I added 408a to a 502 rack,low temp. level was at 10% now at 40%.I seen no change in suction pressure,or discharge pressure.It's been 4 weeks & i have not seen any bad effects.I did change oil to 200 ab as copeland recomends.I have replaced driers AT 3 1/2 weeks.did not find any unusual trash and only small amounts of it.did find some moisture in liquid cores,but not much.The only thing i did not check is superheat at header.I got plenty of ideas as to what might happen,or maybee not.What do you think.
