GIA giatsu PREMIUM R32 Manuel De L'utilisateur Et D'installation page 53

Installation Instructions
Oil applied (to reduce friction with the flare nut)
Oil applied (improves seal air-tightness)
Table 4 Flare nut tightening torque
Pipe Diameter (Inch)
Tightening Torque (N·m)
CAUTION!
Be sure to connect the gas pipe after connecting the liquid pipe completely.
d. Checking the Pipe Connections for Gas Leaking
For both indoor and outdoor unit side, check the joints for gas leaking by the use of a gas
leakage detector without fail when the pipes are connected.
e. Heat Insulation on the Pipe Joints
Stick coupler heat insulation (large and small) to the place where connecting pipes.
Fig.14
Copper piping
Flare nut
Fig.13
1/4˝ 3/8˝
15-30 35-40
17
Piping union
1/2˝ 5/8˝
45-50 60-65
Spanner
Torque wrench
Flare nut
3/4˝ 7/8˝
70-75 80-85