Adding Refrigerant - Samsung RD040MHXCA Series Installation Manual

Adding Refrigerant

The R410a refrigerant is blended refrigerant. Add only liquid refrigerant.

Measure the quantity of the refrigerant depending on the length of the liquid

side pipe. Add fixed quantity of the refrigerant using a scale.
※ Adding the cooling refrigerant
Manifold gauge
Low pressure
side
Scale
※ Adding the heating refrigerant
Manifold gauge
Low pressure
side
Scale
Connect the manifold gage and purge the manifold gage.

Open the manifold gauge valve of the liquid side service valve and add the

liquid refrigerant.
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. (Refer to page 32.)
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 gage to recharge the
remaining refrigerant.
Adding the heating refrigerant

1) When recharging the heating refrigerant, connect the low pressure pipe from
manifold gage to the suction charging port.
2) Press the function key for adding refrigerant in heating mode.
3) After 20 minutes of operation, open the valve on suction charge port.
4) Open the valve for low pressure side on the manifold gage to recharge the
remaining refrigerant.
CAUTION
Open the gas side and liquid side service valve completely after charging the
refrigerant. (If you operate the air conditioner with the service valve closed,
the important parts may be damaged.)
FJM RD040MHXCA_IM_00000_E_2.23.10.indd 23
Outdoor unit
Suction charging
High pressure
side
Liquid side
Gas side
Service valve
Outdoor unit
Suction charging
High pressure
side
Liquid side
Gas side
Service valve
I U
NSTALLING THE NIT
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2010-2-24 19:57:34