Recommended refrigerant copper tubes size are:
REFRIGERANT SYSTEM SCHEME
LIQUID LINE
MF 59
8 mm – 1/3"
MF 69
8 mm – 1/3"
ELECTRONIC
EXPANSION
VALVE
KVP
MF 59
ELE C TRON IC
E X PA NS ION
V A LV E
E LE C TRON IC
E X P A NS ION
V A LVE
MF 69
GAS LINE
9,53 mm - 3/8"
9,53 mm - 3/8"
REFRIGERANT
INLET - LIQUID
REFRIGERANT
OUTLET - GAS
REFR IGE RA N T
INLE T - L IQU ID
K V P
RE FR IGE RAN T
OU TLE T - GA S