Lennox VE2C009N432U, Installation Manual, Page: 16 / 32

Multi Variable Air Conditioners Two-way Cassette Type Indoor Unit
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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.
Fig.4.2
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
(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) It is not allowed to connect the condensate drain pipe into waste pipe or other pipelines
which are likely to produce corrosive or peculiar smell to prevent the smell from entering
indoors or corrupt the unit.
(2) It is not allowed to connect the condensate drain pipe into rain pipe to prevent rain water
from pouring in and cause property loss or personal injury.
(3) Condensate drain pipe should be connected into special drain system for air conditioner.
(4) The drainage pipe should be short and the gradient downwards should be at least 1%~2%
in order to drain condensation water smoothly.
(5) The diameter of drainage hose should be bigger or equal to the diameter of drainage pipe
joint.
(6) 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.