VESSER CGU12N, Service Instructions Manual, Page: 54 / 177

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1.2.6 Drain Piping Work
1. Installation of Drainage Pipeline
‹
A Drainage outlet is located at both the left and right sides of the indoor unit. After selecting one Drainage
outlet, the other outlet shall be blocked by rubber plug. Bundle the blocked outlet with string to avoid
leakage, and also use thermal insulation materials to wrap the blocked outlet.
‹ When shipped out from factory, both the Drainage outlets are blocked by rubber plugs.
‹ When connecting the drainage pipe with the unit, do not apply excessive force to the pipeline at the side of
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‹ Purchase general-purpose hard PVC pipe locally to be used as the drainage pipeline. When carrying
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(As shown in Figure 1-2-9)
‹ When the laid drainage pipe is used for multiple units, the common pipe shall be about 100mm lower than
the drainage outlet of each set of unit. A pipe with thicker wall shall be used for such purpose.
Sponge (gray) Drain hose
Clamp
Clamp(attachment)
Sponge(attachment)
Below 4mm
Figure 1-2-9
2. Testing of Drainage System
‹ After the electrical installation is completed, carry out the testing of the drainage system.
‹ During the test, check if the water correctly flows through the pipelines. Carefully observe the joints to
ensure that there is no leakage. If the unit is to be installed in a new house, carry out testing before
decorating the ceiling.
3. Matters of Attention
‹
The drain pipe outlet direction can be chosen from either the right rear or right.
The diameter of the drain pipe should be equal to or greater than the diameter of the connecting pipe.
(Vinyl tube; pipe size: 20mm; outer dimension: 26mm)
Keep the drain pipe short and incline downwards at a gradient of at least 1/100 to prevent air pockets.
(Refer to Figure 1-2-10) .
When drain hose is connected
Incline the drain hose
Not to be lifted
Not foldings
Not to be soaking in water
Figure 1-2-10