63
TO CLOSE THE VALVE STEM
1. Open the cap and turn the valve stem clockwise by using a hexagonal wrench.
Outer
Diameter
(mm)
Tightening torque (N•m)
Operating torque
(N•m)
Body cap
Charging port
cap
Stem
ø 6.35
20 ~ 25
10 ~ 12
Max 5
ø 9.52
Max 5
ø 12.70
Max 5
ø 15.88
Max 5
ø 19.05
Max 12
❋
1 N•m = 10 kgf•cm
2. Tighten the valve stem until it reaches the sealing edge.
•Do not apply excessive force to the valve stem and always use special instruments. Otherwise, the contact
The surface between the valve stem and sealing edge can be damaged and refrigerant can leak through this damage.
surface.
• If the refrigerant would leak, turn the valve stem back by half and tighten the valve stem again, then check the
leakage. If there is no leakage anymore, tighten the valve stem entirely.
3. Tighten the cap securely.
TO OPEN THE VALVE STEM
1. Remove the cap.
2. Turn the valve stem counterclockwise by using a hexagonal wrench.
3. Turn the valve stem until it is stopped.
4. Tighten the cap securely.
• When you use the service port, always use a charging hose, too.
• Check the leakage of refrigerant gas after tightening the cap.
• Must use a spanner and wrench when you open/tighten the valve stem.
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