Hitachi RCI-3.0FSN4 - Flared Connection Mounting

3 Piping work and refrigerant charge
Copper refrigerant pipe
SMGB0099 rev.0 - 12/2016
104
3.4.5 Flared connection mounting
Line up the end of the ared pipe to face the tting to which it is to be threaded.
1 Reducer valve
2 Pressure gauge
3 High pressure pipe.
4 Valve with no packing.
5 Rubber cap
Gently rest the female cone on the male cone and check that the measurement is correct. Keep the connection lined up
with one hand and gently thread on the are nut with the other.
Tighten the connection to the corresponding tightening torque indicated in the table below.
Nominal diameter
Tightening torque
mm Inches
Ø6.35 1/4 20 Nm
Ø9.52 3/8 40 Nm
Ø12.7 1/2 60 Nm
Ø15.88 5/8 80 Nm
Ø19.05 3/4 100 Nm
Ø22.20 7/8 –
Ø25.40 1 –
Ø28.60 1-1/8 –
! CAUTION
• Secure the xed connection with a suitable wrench and use a torque wrench to tighten the are nut on the threaded connections.
• Do not exceed the torque value indicated in the table. The tting can become misshapen and the connection may leak.