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Smart Power
7.5.4 Piping connection method
• Apply refrigerant oil to the joint and the ange.
• To bend a pipe, give the roundness as possible not to crush the pipe.
• When connecting pipe, hold the pipe centre to centre and then screw nut on by
hand, refer to Fig.
• Be careful not to let foreign matters, such as sands enter the pipe
Pipe diameter Fastening torque (N.m)
Liquid pipe Ф6.35mm 14.2-17.2
Liquid pipe Ф9.52mm 32.7-39.9
Gas pipe Ф12.7mm 49.5-60.3
Gas pipe Ф15.88mm 61.8-75.4
Gas pipe Ф19.05mm 97.2-118.6
• Field pipes can be installed in four directions (A, B, C, D, E) .
A: Forward
B: Backward
C: Sideways
D: Downward
E: Power supply cable,outdoor and indoor
connection cable
• Cutting out the two slits makes it possible to install as shown in the gure "Field pipes in 4 directions".
(Use a metal saw to cut out the slits.)
• To install the connecting pipe to the unit in a downward direction, make a knock-out hole by penetrating the centre
area around the knock-out hole using a Φ6mm drill (4x) .
• After knocking out the knock-out hole, it is recommended to apply repair paint to the edge and the surrounding
end surfaces to prevent rusting.
• When passing electrical wiring through the knock-out holes, remove any burrs from the know-out holes and wrap
the wiring with protective tape to prevent damage.
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