R404a

[cool king2007]

Hi everybody,
Is it necessary to charge R404a as a liquid? if yes why?
Thanks

[mad fridgie]

"Yes" (R404a isa mixture of gases)
In simple terms if you charge with vapour, the refrigerant breaks down to its original parts. This applies to all refrigerants that start with a "4"

[cool king2007]

mad fridgie,
Thanks for your reply.
But how can i prove that?
Regards @ thanks

[Sandro Baptista]

Even so, for R404A this effect it isn't very meaningful.

[cool king2007]

Even so, for R404A this effect it isn't very meaningful.

Hi Sandro,
But if you see the carton of R404a cylinder they recommended to charge it as a liquid

[Sandro Baptista]

Yes, but just say that it is not so bad as charging R407C, as vapor for example.

The R404A is near azeotropic.

[Aik]

Is it necessary to charge R404a as a liquid? if yes why?

If you charge whole container then it doesn't matter in which phase you charging. And if you charge part of container's refrigerant it would be better to charge in liquid phase. But, as say Sandro Baptista:

Even so, for R404A this effect it isn't very meaningful.