02
INST
ALLA
TION
23
English
Adding refrigerant (R-410A)
The outdoor unit is loaded with sufficient refrigerant for the standard piping. Thus, refrigerant must be added if the piping is
lengthened. This operation can only be performed by a qualified refrigeration specialist. For quantity of adding refrigerant,
refer to page 20.
1. Check that the stop valve is closed entirely.
2. Charge the refrigerant through the service port of liquid stop valve.
• Do not charge the refrigerant through the gas side service port.
NOTE
3. If you cannot charge the refrigerant according to the upper steps, following these :
1) Open both liquid stop valve and gas stop valve.
2) Operate the air conditioner by pressing the K2 key on the outdoor unit PCB.
3) About 30 minutes later, charge the refrigerant through the service port of gas stop valve.
• If necessary, refer to the pressure table classified by outdoor temperature.
NOTE
1
Ref.
Gas side stop valve(service port)
Outdoor unit
Indoor unit
Balance
Vacuum pump
Liquid side stop valve(service port)
How to Calculate the Quantity of Adding Refrigerant
The quantity of additional refrigerant is variable according to the installation situation. Thus, make sure the outdoor unit situation before
adding refrigerant. This operation can only be performed by a qualified refrigeration specialist.
Single installation outdoor unit
Model
Interconnection pipe length (m)
0~5
5~20
20~30
30~40
40~50
50~60
60~70
70~75
AC012MXQFEC
0
0
AC018MXQFEC
0
+10g/m over 5m
AC024MXQFEC
0
+15g/m over 5m
AC030MXQFEC
0
+30g/m over 5m
AC036MXQFEC
0
+30g/m over 5m
AC042MXQFEC
0
AC048MXQFGC
0
AC060MXQFGC
0
Summary of Contents for AC-505CM Series
Page 38: ......
