Samsung RD VHXF Series Installation Manual page 47

When installing more than 1 outdoor unit
Gauge manifold
R410A
Scale
Vacuum pump
• Open the gauge manifold valve connected to the liquid side service valve and add the liquid
refrigerant.
• If you cannot add the whole quantity of the refrigerant while the outdoor unit is stopped, open
the gas side and liquid side service valve. Add remaining refrigerant by pressing the refrigerant
adding button of the outdoor PCB.
• 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
CAUTION
important parts may be damaged.)
• When using the modular outdoor unit, open the service valve of the oil balancing pipe.
• P ut on safety equipment when charging refrigerant.
• When the refrigerant is being charged, do not perform any other work such as
insulation, dip switch setting etc.
• Make sure not to get damaged from the fan when operating the unit while the front
panel is being opened.
• Do not heat the refrigerant vessel for fast refrigerant charging when the outside
temperature is low during winter season. There is a potential risk of explosion.
• Make sure that the refrigerant does not emit while connecting the gauge manifold to
the charging port for heating.
• Close the valve of the refrigerant vessel rapidly after charging refrigerant.
If not, a change in the whole refrigerant quantity may occur.
Outdoor unit
Liquid side
Gas side Oil equalization
Service valve
completing the installation and commissioning _47