Charge only with liquid.

[Grizzly]

Hi Turbo.
What do you mean by "Bomb the Receiver"?
"Bomb" is a term used for NDT Testing down my way!
Just to clarify, I have been taught where water is in contact with the refrigerant pipework.
In say a shell and tube evaps or condenser etc.
You charge to 0c to prevent Ice crystals forming and crushing the copper tubes within.

We all know about blends and why it's necessary to charge from the cylinder in Liquid form.
If practicable I and many of my colleagues do the same on other equipment out of habit.
As has been pointed out by others on this post it is not "technically" necessary.

A marine application is one of the worst for tubes being crushed.
Where the tech forgets that in dry dock the shell and tubes usually filled with sea water are empty.
So the ice crystals formed crush the tubes with alarming results.
So in fairness to all, knowledge of the particular system you are working on is paramount.
Grizzly