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Refrigerant piping work
Adding refrigerant
f The R-410A refrigerant is blended refrigerant . Add only liquid refrigerant .
f
f Measure the quantity of the refrigerant depending on the length of the liquid side pipe . Add fixed quantity of the
f
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
f Open the manifold gauge valve of the liquid side service valve and add the liquid refrigerant .
f
f If you cannot fully recharge the additional refrigerant while the outdoor unit is stopped, use the key on the outdoor unit
f
PCB to recharge the remaining refrigerant .
f Adding the cooling refrigerant
f
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
ENGLISH-34
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