R 404a

[paul_h]

As per Dupont, the refrigerant 507 is very consitant. At the same time they recommend that charging should be done in the liquid phase. Now what happens if the refrigerant leakage is from the discharge or suction side. Does it still remain consistant ?

Recommend is the magic word there. The word isn't "must" like R410a or r407c. Meaning nothing horrible would happen if you top up a system that leaked from discharge, suction or liquid line.

edit:
What did you do with r502? scap the whole lot every time there was a leak or only topped up with liquid when there was a leak, or happily vapour charge for top ups?
I would not top up r407c or r410a, as I posted in the other thread, it's a decision they may cost the repairer money unless there was an agreement with the customer to get you out of jail. My opinion here differs just because r404a is just r507 with a bit of r134a thrown in. And personal experience has found that r134a in or out makes no difference, ie, they run happy in r507. And r507 doesn't leak in such a way that their components become unbalanced.