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4.2 Refrigerant Pipe Connection
(1) Aim the flaring port of copper pipe at the center of screwed joint and then tighten the flaring
nut with hand as shown in fig 4.2.
(2) Use a torque wrench to tighten up the flaring nut until the wrench gives out a click sound.
(3) The pipe should not be bent too much or it may crack. Use a pipe bender when bending
the pipe.
(4) Wrap the connection pipe and joint with sponge and then tie them firmly with tape.
4.3 Drainage Pipe Installation and Drainage System Testing
4.3.1 Notice for Installation of Drainage Pipe
(1) The drainage pipe should be short and the gradient downwards should be at least 1%～
2% in order to drain condensation water smoothly.
(2) The diameter of drainage hose should be bigger or equal to the diameter of drainage pipe
joint.
Fig.4.2
Compact 4-Way Cassette Indoor Unit
Fig 4.1.5
Pipe diameter mm(in)
Φ6.35 (1/4)
Φ9.52 (3/8)
Φ12.7 (1/2)
Φ15.9 (5/8)
10
Torque for tightening nut
Torque (N·m)
15～30
35～40
45～50
60～65
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