If the system is not clearly marked as to what refrigerant is in there you should recover whatever it is into your "mixed" refrigerant recovery tank, change the drier, evacuate, recharge and mark the system properly. Even with a marked system I'm finding some that are suspect if it's apparent someone else has been there.Originally posted by self employed 1
im goiing out tonight no supply houses open toninght. ive been to this restraunt b-4, havent had to work on it prior. but i noticed it wasnt marked. any way isnt there a way to do it with a p-t chart, or are they just too close.
It's more critical these days than ever because there are so many guys out there topping off with whatever they have on the truck or just not marking the systems with what they may have properly recharged with.
You simply cannot diagnose and service your customer's equipment properly if you are not sure of what refrigerant is in his system. If the customer has been jumping around from one service company to the next, this is the price he will have to pay.....end of the story.