26
Outdoor Unit
WARNING
After completing work, securely tighten both service ports and caps so that gas does not leak.
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.
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
Cautions in pipe connection/valve operation
Ball Valve
(Liquid pipe)
Ball Valve
(Low Pressure Gas pipe)
Flare Valve
(High Pressure Gas pipe)
1
Open status when both the pipe and
the valve are in a straight line.
Cut both the pipe and the valve with a
cutter to suit the length
(Don't cut the length of less than 70mm)
Refrigerant piping installation
