How much R134a do you put in a sub zero 550 refrigerator and also the freezer

Sub-Zero had started to manufacture these based on R-12 refrigerant, so you have to verify the serial number to know the actual type of refrigerant needed. According to Sub-Zero tech bulletin for the 500 Series   it goes like this:

Charge R-12 refrigerant

Prior to serial #M/P681166: 

from #M/P681166 to # M/P964070 and from #M/P964496 to #M/P1004775:

from #M/P964070 to #M/P964496, from #M/P1004775 to #M/P1184141 and from #M/P1184239 to #M1204990/P1214590:

Charge R-134a refrigerant

From serial #M/P1184140 to #M/P1184239: 

Starting with #M1204990/P1214590 :