Sharp GX-X18SCR Installation And Operation Manual page 19

Be sure to connect the gas pipe after connecting the liquid pipe completely.
4.3.4 Connecting the Pipe at the Outdoor Side Unit
Tighten the flare nut of the connection pipe at the outdoor unit valve
connector. The tightening method is the same as that as at the
indoor side.
4.3.5 Checking the Pipe Connections for Gas Leaking
For both indoor and outdoor unit side, check the joints for gas
leaking by the use
the pipes are connected.
4.3.6 Heat Insulation on the Pipe Joints (Indoor Side Only)
Stick coupler heat insulation (large and small) to the place where connecting pipes.
Table 9 Flare nut tightening torque
Pipe Diameter
1/4˝(Inch)
3/8˝(Inch)
5/8˝(Inch)
1/2˝(Inch)
of a gas leakage detector without fail when
DC Inverter Cassette Type Unit
Tightening Torque
15-30 (N·m)
35-40 (N·m)
60-65 (N·m)
45-50 (N·m)
CAUTION!
Fig.17
14
Fig.16