Viking GWH12UB Owner's Manual page 41

Additional refrigerant charging amount for R22, R407C, R410A and R134a
Liquid pipe(mm) Gas pipe(mm)
_
_
Outdoor unit throttle
Cooling only(g/m) Cooling and heating(g/m)
15
15
30
60
250
350
3
20
50
120
120
250
350