Samsung AC***MXSCCC - Using stop valve; Opening and Closing Stop Valves; Tightening Torque for Valves

Using stop valve
To Open the Stop Valve
1. Open the cap and turn the stop valve counterclockwise by using a hexagonal wrench.
2. Turn it until the axis is stopped.
t Do not apply excessive force to the stop valve and always use special instruments. Otherwise, the stopping box
can be damaged and the back sheet can leaks.
t If the watertight sheet leaks, turn the axis back by half, tighten the stopping box, then check the leakage again.
If there is no leakage any more, tighten the axis entirely.
NOTE
3. Tighten the cap securely.
To Close the Stop Valve
1. Remove the cap.
2. Turn the stop valve clockwise by using a hexagonal wrench.
3. Tighten the axis until the valve reached the sealing point.
4. Tighten the cap securely.
t When you use the service port, always use a charging hose, too.
t Check the leakage of refrigerant gas after tightening the cap.
t Must use a spanner and wrench when you open/tighten the stop valve.
CAUTION
f Before inspecting the leakage, use a torque wrench to close
the cap for the service valve. (Comply with a tightening
torque for each size of the diameter, and tighten the cap
rmly to prevent any leakage.)
f To check for any possible leakage, inert gas into the
pipes connected to indoor/outdoor units and check the
connection part of the indoor/outdoor units with soap
lather or liquid for leakage test.
Spindle
Tightening torque for body cap
(Refer to the table)
Charging core
Tightening torque for charging port cap
(Refer to the table)
R-22 : Diameter of the screw - 7/16-20UNF
R-410A : Diameter of the screw - 1/2-20UNF
Outer diameter
[mm(inch)]
Tightening torque
Body cap
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Charging port cap
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Ø6.35(1/4") 20~25(14.75~18.44)
10~12(7.38~8.85)
Ø9.52(3/8") 20~25(14.75~18.44)
Ø12.70(1/2") 25~30(18.44~22.13)
Ø15.88(5/8") 30~35(22.13~25.81)
Over Ø19.05(3/4") 35~40(25.81~29.50)
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02 INSTALLATION
English-25