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1
Installation of outdoor
1 - 8 Refrigerant piping
1 - 8 - 8
Additional refrigerant charge
Additional refrigerant charge procedure (2)-by Additional refrigerant charge operation
About the system settings for additional refrigerant charge operation, refer to the [Service Precaution] label attached on the electric box cover in the
outside unit.
1
Fully open all shutoff valves (valve A and valve B must be left fully closed).
2
After ten minutes, fully close liquid line shutoff valve and then, open the valve by turning 180°.
Start the additional refrigerant charge operation.
See [Service precautions] Label for detail.
If it is difficult to charge the refrigerant additionally, decrease the water temperature or warm the refrigerant tank.
(Warm the refrigerant tank with a stupe or a warm hot water of 40 degrees or less.)
3
After the system is charged with a specified amount of refrigerant, press the RETURN button (BS3) on the PC board (A1P) in the outside unit to
stop the additional refrigerant charge operation.
4
Immediately open both liquid-side and gas-side shutoff valve.
(If do not open the shutoff valve immediately, liquid seal may cause the pipe to burst.)
N
OTE
Procedures for charging additional refrigerant.
(Refer to figure above)
• Installation procedure
®
• VRV
Systems • Installation procedure
29
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