I'm looking for a R123 recovery unit for a 1300 ton chiller, I will appreciate if somebody can help me
You can really use any recovery machine,depends on how you plan to pull it out, but the best are the old style welsch pumps. use a push pull till you get liquid out, then vapor recovery the rest .
Ref Tech makes a nice one. All self contained if you want. I've had good luck with them.
When the going gets weird, the weird turn pro. HST
Trane rents them if you don't want to buy one