470
ATTENTION
■ For normal drainage, the water drainage piping should be connected according to the installation manual. Heat
insulation should be performed to avoid condensation. Improper pipe connection may cause water going into the
machine.
Requirements:
■ Heat insulating treatment should be made for the water drainpipes of the indoor units.
■ Heat preservation should be made for the connection with the indoor units. Improper heat preservation may
cause condensing.
■ The drainpipe should be designed with a down gradient of 1/100. The midway of the elbow shouldn’t be made in
S shape. Or abnormal noise may be caused.
■ The lateral length of the drainpipe should be kept within 20m.
■ The central piping can be connected according the following gure.
■ Don’t apply external force to the connection of drainpipes.
Down gradient of over 1/100
Piping Materials & Heat Insulating Materials
Hose
Conrming water drainage
Tubing Permissible Length & Height Difference
As to prevent condensation, heat insulating
treatment should be performed. The heat
insulating treatment for piping should be
done respectively.
Piping Material
Hard PVC tube
VP31.5mm (inner bore)
Heat Insulating
Material
Vesicant polythene
thickness: over 7mm
The drainage hose is made of
Φ
19.05mm (3/4”) PVC tube, which can adjust the eccentricity and the angle of the
hard PVC tube.
■ Stretch the hose directly to make connections as to avoid distortion. The soft end of the hose should be positioned
with a clamp.
■ The hose should be used in the horizon direction.
Heat Insulating Treatment:
■ Wrap the connection between the clamp and the root segment of the indoor unit without any gap with heat
insulating materials as shown in the drawing.
During the test run, check the condition of water
drainage and make sure that there is no leakage on the
connection of piping, which should also be performed
during the winter.
Please refer to the attached manual of outdoor units.
Hose Hose clamp
Attached heat
insulating material
Heat insulating
material
Horniness pvc pipe
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