The fastest method for charging a large system that holds 50 lb of refrigerant is to add:
A) Liquid into the king valve with the king valve front-seated and the system operating.
B) Liquid into the suction service valve with the system running.
C) Vapor into the suction service valve with the system off.
D) Vapor into both the suction service valve and king valve with the system off.
A
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