Refrigerant Piping Installation - LG Multi V ARUB Series Installation Manual

Refrigerant piping installation

Refrigerant piping installation
WARNING
Always use extreme care to prevent the refrigerant gas (R-410A) from the leakage while using fire or
flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it
breaks down and generates a poisonous gas which can cause gas poisoning. Never perform brazing
in an unventilated room. Always conduct an inspection for gas leakage after installation of the refrig-
erant piping has been completed.
Cautions in pipe connection/valve operation
Open status when both the pipe and
the valve are in a straight line.
WARNING
After completing work, securely tighten both service ports and caps so that gas does not leak.
Pipe joint (auxiliary parts): Securely perform brazing with a nitrogen blow into the service valve port.
(Releasing pressure : 0.02 MPa or less)
Flare nut: Loose or tighten flare nut by using the wrench with both ends. Coat the flare connection part with
oil for the compressor.
Service port: Make the refrigerant pipe vacuum and charge it using the service port. Always reattach caps
after completing work (tightening torque of service cap: 14Nm (140kg-cm) or more).
Liquid pipe
Low Pressure Gas pipe
High Pressure Gas pipe
Elbow joint
26 Outdoor Unit
Cut both the pipe and the valve with a
cutter to suit the length
(Don't cut the length of less than 70mm)
Flare Valve
(High Pressure Gas pipe)
Ball Valve
(Liquid pipe)
Ball Valve
(Low Pressure Gas pipe)
1