AA
26
English
Adding refrigerant
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 26.
1. Check that the stop valve is closed entirely.
2. Charge the refrigerant through the service port of liquid stop valve.
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.
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.
Model
Interconnection pipe length (m)
0~5
5~10
10~20
20~30
30~40
40~50
AC052NX
∗
SEC
AC071NX
∗
SEC
+10g/m over 5m
-
-
AC090NX
∗
SGC
+15g/m over 5m
AC100NX
∗
SGC
AC120NX
∗
SGC
AC140NX
∗
SGC
AC160NX
M
SGC
+20g/m over 5m
NOTE
• Do not charge the refrigerant through the gas side service port.
NOTE
• If necessary, refer to the pressure table classified by outdoor temperature.
Summary of Contents for AC NX S C Series
Page 32: ......
