<Packed valve handling precautions>
Fig. 10-4-9
• Open the valve stem all the way out, but do not try
to open it beyond the stopper.
Cap Torque
Pipe size of Packed Valve
Size of Hexagon wrench
12.70 mm and smallers
A = 4 mm
15.88 mm
A = 5 mm
• Securely tighten the valve cap with torque in the
following table
Cap Size (H)
Valve Rod
Cap
Service
Port Cap
H17 - H19
H22 - H30
H14
H17
14~18 N.m
(1.4 to 1.8 kgf·m)
33~42 N.m
(3.3 to 4.2 kgf·m)
8~12 N.m
(0.8 to 1.2 kgf·m)
14~18 N.m
(1.4 to 1.8 kgf·m)
A
H
Hexagon wrench
is required.
Service Port Cap
Valve Rod Cap
Fig. 10-4-8
Packed valve at liquid side
Packed valve at gas side
Service port (Valve core (Setting pin))
Vacuum
pump
Vacuum pump adapter for
counter-f ow prevention
Charge hose
Handle High
(Keep full closed)
Manifold valve
Pressure gauge
Compound pressure gauge
Handle Low
Charge hose
Connecting pipe
–101 kPa
(–76 cmHg)
CAUTION
• KEEP IMPORTANT 7 POINTS FOR PIPING W
ORK
(1)
(2)
(3)
Take away dust and moisture (inside of the
connecting pipes).
Tighten the connections (between pipes and unit).
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 flared joints
are not allowed indoors. When mechanical
connectors are reused indoors, sealing parts shall
be renewed. When flared joints are reused
indoors,
the flare part shall be refabricated.
(7) Don't operate air conditioner in case no
refrigerant
in the system
.
1. Turn off the Air Conditioner system.
2. Connect the charge hose from the manifold valve to the
service port of the packed valve at gas side.
3. Turn on the Air Conditioner system in cooling operation more
than 10 minutes.
4. Check the operating pressure of the system should be normal
value. (Ref. with product specification)
5. Release the valve rod cap of both service valves.
6. Use the Hexagon wrench to turning the valve rod of Liquid
side fully close.
(*Make sure no entering air into the system)
7. Continue operate Air Conditioner system until the gauge
of manifold dropped into the range of 0.5 - 0 kgf/cm
2
8. Use the Hexagon wrench to turning the valve rod of Gas side
fully close. And turn off the Air Conditioner system
immediately thereafter.
9. Remove the gauge manifold from the service port of the
packed valve.
10. Securely tighten the valve rod cap to the both service valves.
CAUTION
<Pump down process>
Should be check the compressor operating condition
while pumping down process. It must not any abnormal
sound, more vibration. It is abnormal condition appears
and must turn off the Air Conditioner immediately.
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