Flared Connection Mounting - Hitachi RCI-1.0FSN4 Service Manual

3 Piping work and refrigerant charge
Copper refrigerant pipe

3.4.5 Flared connection mounting

Line up the end of the flared pipe to face the fitting 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 flare nut with the other.
Tighten the connection to the corresponding tightening torque indicated in the table below.
Nominal diameter
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
Ø22.20
Ø25.40
Ø28.60
!
C A U T I O N
• Secure the fixed connection with a suitable wrench and use a torque wrench to tighten the flare nut on the threaded connections.
• Do not exceed the torque value indicated in the table. The fitting can become misshapen and the connection may leak.
104 SMGB0099 rev.0 - 12/2016
Inches
1/4
3/8
1/2
5/8
3/4
7/8
1
1-1/8
Tightening torque
20 Nm
40 Nm
60 Nm
80 Nm
100 Nm
–
–
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