Packed Valve Handling Precautions - Toshiba RAS-18J2KVSG-E Service Manual

Compound pressure gauge Pressure gauge
–101 kPa
(–76 cmHg)
Handle Lo
Charge hose
Connecting pipe
Packed valve at gas side
Service port (Valve core (Setting pin))
Packed valve at liquid side
Fig. 10-4-7
CAUTION
• KEEP IMPORTANT 6 POINTS FOR PIPING WORK.
(1) Take away dust and moisture (inside of the
connecting pipes).
(2) Tighten the connections (between pipes and unit).
(3) Evacuate the air in the connecting pipes using
a VACUUM PUMP.
(4) Check gas leak (connected points).
(5) Be sure to fully open the packed valves
before operation.
(6) Reusable mechanical connectors and f ared joints
are not allowed indoors. When mechanical connectors
are reused indoors, sealing parts shall be renewed.
When f ared joints are reused indoors, the f are part shall be
refabricated.
<Packed valve handling precautions>
• Open the valve stem all the way out, but do not try
to open it beyond the stopper.
Pipe size of Packed Valve
12.70 mm and smallers
15.88 mm
• Securely tighten the valve cap with torque in the
following table
Manifold valve
Handle Hi
(Keep full closed)
Charge hose
Vacuum pump adapter for
counter-f ow prevention
Vacuum
pump
Size of Hexagon wrench
A = 4 mm
A = 5 mm
Cap Cap Size (H)
H17 - H19
Valve Rod
Cap
Service
Port Cap
Service Port Cap
- 81 -
Torque
14~18 N.m
(1.4 to 1.8 kgf·m)
33~42 N.m
H22 - H30
(3.3 to 4.2 kgf·m)
8~12 N.m
H14
(0.8 to 1.2 kgf·m)
14~18 N.m
H17
(1.4 to 1.8 kgf·m)
Hexagon wrench
is required.
A
H
Valve Rod Cap
Fig. 10-4-8