haier AE122BCAAA (H2EM-18H03) - Manual (Page 22)

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Installation procedure
Install indoor unit
Notice
In order to normally drain water, the drain hose should be mated according to the
installation manual. In order to avoid dew-forming, thermal insulation treatment
should be done.Improper connection pipe may cause water enter indoor.
Requirements:
The indoor side drain hose should be thermal insulated.
The parts connected with indoor unit should be thermal insulated. Improper
thermal insulation may cause dew-forming phenomenon.
The drain hose should be downwards slant (over 1/100) and there
should be no S-shaped bend. Otherwise, abnormal sound may occur.
The horizontal length of the drain hose should be less than 20m. If the
connection pipe is too long, the supporting frame should be set every
1.5~2m to prevent pipe from rise and fall.
For the centralized connection pipe, please perform work as the following Figure shown.
Pay attention not to exerting external force to the connection part of the drain hose.
Material of connection pipe and thermal insulation
Material of connection pipe Stiff PVC pipe VP 20mm (inside diameter)
Material of thermal insulation Foam polyethylene pipe, thickness over 10mm
Confirm drainage
Perform test run to insure the condition of drainage, the connection part of the connection
should not leak water. The confirmation must be performed even if install in winter.
wall
outside
Slant
Drain hose (user self-provided)
1.5m*2m
VP30
Supporting frame
Thermal insulation material
user self-provided)
Downward slant over 1/100
S-shaped bend As large as possible (about 10cm)
Downward slant over 1/100