16
TEST OF DRAINAGE SYSTEM
• After the electric installation, please take a test for the drainage system.
• During the test, check if the water flow goes through the pipe correctly and observe carefully the joint
to see if it leaks or not. If this unit is installed in the newly built house, it is suggested to take this test
prior to the ceiling decoration.
PIPING
• Aim the pipe joint at the corresponding bell mouth.
• Pre-tighten the union nut with hand.
• Place the open-end wrench on the pipe joint and
place the torque wrench on the union nut. Tighten
the union nut with torque wrench. Adjust the torque
force by referring to the following table.
• Wrap the indoor pipe and joint of connection pipe
with insulating pipe, and then wrap it with tape.
CAUTION
• During the connection of the indoor unit and the refrigerant pipe, never pull any joints of the indoor
unit by force; otherwise the capillary pipe or other pipes may crack, which would result in leakage.
• The refrigerant pipe should be supported by brackets. Do not let the unit withstand the weight of it.
• If the pipe diameter of the outdoor unit doesn’t match the piping connection size of the indoor unit,
use the piping connection size of the indoor unit and add the adaptor supplied with the indoor unit.
• The bending degree of the pipe cannot be too small; otherwise it will crack.
• Use a pipe tube bender to bend the pipe.
INSULATION OF REFRIGERANT PIPE
• The refrigerant pipe should be insulated with insulating
material and wrapped with tape in order to prevent
condensation and water leakage.
• The joints of the indoor unit should be wrapped with insu-
lating material and no gap is allowed as shown opposite.
No Gap
pipe joint
union nut
pipe
open-end wrench
union nut
pipe
torque wrench
indoor pipe
Hex nut diameter
Tightening torque
(N-m)
Φ 6
15~20
Φ 9.52
30~40
Φ 12
45~55
Φ 16
60~65
Φ 19
70~75
insulating pipe
