Daikin VRV II Series, Design, Installation & Testing Instructions, Page: 185 / 242

Si39-303
Installation Manual 179
One outdoor unit installed: In case of RXYQ5-16MY1B
[Additional refrigerant charge procedure]
To learn the system settings for additional refrigerant charging, refer to the [Service Precaution]
label attached on the back of the electric box lid in the outdoor unit.
1.Fully open the gas line shutoff valve (liquid line shutoff valve and valve A above must be
left fully closed) and start the additional refrigerant charge operation.
2.After the system is charged with a specified amount of refrigerant, press the confirmation
button (BS3) on the P-board (A1P) in the outdoor unit to stop the additional refrigerant
charge operation.
3.Immediately restore the shutoff valve to the following status. (Otherwise, the piping may
burst due to liquid seal.)
[Additional refrigerant charge procedure]
To learn the system settings for additional refrigerant charging, refer to the [Service Precaution]
label attached on the back of the electric box lid in the outdoor unit.
1.Fully open the gas line shutoff valve/oil-equalizing line shutoff valve (liquid line shutoff
valve and valves A and B above must be left fully closed), start the additional refrigerant
charge operation.
2.After the system is charged with a specified amount of refrigerant, press the confirmation
button (BS3) on the P-board (A1P) in the outdoor unit to stop the additional refrigerant
charge operation.
3.Immediately restore the shutoff valve to the following status. (Otherwise, the piping may
burst due to liquid seal.)
Caution If the refrigerant cylinder is siphonal, set it upright while charging additional refrigerant.
1. Pressure reducing valve
2. Nitrogen
3. Tank
4. Siphon system
5. Measuring instrument
6. Vacuum pump
7. Valve A
8. Gas side
9. Outdoor unit
10. Liquid side
11. Indoor unit
12. Shutoff valve service port
13. Charge hose
14. To indoor unit
15. Oil-equalizing line
16. Valve B
17. Dotted lines represent onsite piping
Liquid line shutoff valve Gas line shutoff valve Oil-equalizing line shutoff valve
Open Open
Close (Default status before
delivery)
Liquid line shutoff valve Gas line shutoff valve Oil-equalizing line shutoff valve
Open Open Open
1
1
2
2
3
3
4
4
5
5
6
6
7
7
13
12
14
8
9
9
8
9
10
10
15
11
12
17
16
17
13
When multiple outdoor units installed:
In case of RXYQ18-48MY1B