Multi Variable Air Conditioners Duct Type Indoor Unit
12
Fig 4.1.7
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) Tighten the flaring nut with torque wrench.
Fig 4.2
(3) Use pipe bend when bending the pipe and the bending angle should not be too small.
(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 Drain 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.
(3) Install drainage pipe according to the following fig and arrange insulation to the drainage
pipe. Improper installation may lead to water leakage and damp the furniture and other
things in the room.
(4) You can buy normal hard PVC pipe used as the drainage pipe. During connection, insert
the end of PVC pipe into the drainage hole and then tighten it with drainage hole and wire
binder. Can’t connect the drainage hole and drainage hole with glue.
Torque for tightening nut
Pipe diameter (mm)
Torque (N·m)
φ6.35
15~30
φ9.52
35~40
Φ12.7
45~50
φ15.9
60~65
