GIA giatsu ROUND R32 Manuel De L'utilisateur Et D'installation page 50

Installation of the Unit
When the flare nut is tightened properly by your hand, use a torque wrench to finally tighten it.
Holding spanner
Table 3 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.
4. Heat Insulation on the Pipe Joints (Indoor Side Only)
Stick coupler heat insulation (large and small) to the place where connecting pipes.
Fig.16
Torque wrench
Fig.14
Fig.15
1/4˝ 3/8˝
15-30 35-40
16
5/8˝ 1/2˝
60-65 45-50
3/4˝ 7/8˝
70-75 80-85