Samsung AE120JXEDEH Installation Manual page 34

Refrigerant piping work
Adding refrigerant
f The R-410A refrigerant is blended refrigerant. Add only liquid refrigerant.
f Measure the quantity of the refrigerant depending on the length of the liquid side pipe. Add xed quantity of the
refrigerant using a scale.
❋ Adding refrigerants in cooling conditions
Manifold gauge
Low pressure
side
Scale
❋ Adding refrigerants in heating conditions
Manifold gauge
Low
pressure
side
Scale
f Connect the manifold gauge and purge the manifold gauge.
f Open the manifold gauge valve of the liquid side service valve and add the liquid refrigerant.
f If you cannot fully recharge the additional refrigerant while the outdoor unit is stopped, use the key on the outdoor unit
PCB to recharge the remaining refrigerant.
f Adding the cooling refrigerant
1) Press the function key for adding refrigerant in cooling mode.
2) After 20 minutes of operation, open the valve on gas side.
3) Open the valve for low pressure side on the manifold gauge to recharge the remaining refrigerant.
Outdoor unit
High
pressure
side
Liquid side
Gas side
Service valve
Outdoor
unit
High pressure
side
Liquid side
Gas side
Service valve
Suction charging
Suction charging
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