Flared Connection Mounting - Hitachi RCI-1.0FSN3 Service Manual

3 Piping work and
refrigerant charge
1. Heat the outer pipe previously to ensure the filler metal flows
more easily.
2. Heat the inner pipe evenly.
3. Rubber cap.
4. Valve with no packing.
5. High pressure pipe.
6. 0.03 to 0.05 MPa (0.3 to 0.5 kg/cm
7. Reducer valve: only open the valve when gas is required.
8. Nitrogen gas flow, 0.05 m
CAUTION
Keep the nitrogen gas pressure within the indicated values. A rise in pressure in the pipe could cause an explosion.

3.4.7 Flared connection mounting

Line up the end of the flared pipe to face the fitting to which it is to
be threaded.
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.
100
SMGB0077 rev.0 - 01/2013
G).
2
/h or less.
3
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
–
–
–