Haier AB072MRERA Service Manual page 179

■ 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. Under the condition of long pipe, a support should
be provided every 1.52~2m to avoid unevenness.
■ The central piping can be connected according the following figure.
■ Don't apply external force to the connection of drainpipes.
H
D
Piping Materials & Heat Insulating Materials
As to prevent condensation, heat insulating treatment
should be performed. The heat insulating treatment for
piping should be done respectively.
Hose
The drainage hose is made of Φ19.05mm (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 Insulation 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. Don't apply external force to the connection of drainpipes.
Confirm drainage
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.
ATTENTION
S
Piping Material
Heat Insulating
Material
A
171
M
D
Hard PVC tube VP31.5mm
(inner bore)
Vesicant polythene thickness:
over 7mm
H H
H
H