E-
18
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 19.
Check that the stop valve is closed entirely.
1
Charge the refrigerant through the service port of liquid stop valve.
2
If you cannot charge the refrigerant according to the upper steps,
following these:
3-1
Open both liquid stop valve and gas stop valve.
3-2
Operate the air conditioner by pressing the K2 key on the outdoor
unit PCB.
3-3
About 30 minutes later, charge the refrigerant through the service
port of gas stop valve.
3
◆
Do not charge the refrigerant through the gas side service port.
N
N
N
N
o
o
o
o
tt
tt
e
e
e
e
◆
If necessary, refer to the pressure table classified by outdoor
temperature.
N
N
N
N
o
o
o
o
tt
tt
e
e
e
e
1
Ref.
Gas side stop valve(service port)
Outdoor unit
Indoor unit
Balance
Vacuum pump
Liquid side stop valve(service port)
UH026EAV IM_E_24005 12/29/05 10:56 AM Page 18
