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9.5 Installation of Drainage Pipeline
The drainage pipeline shall be installed with an inclining angel of 5 ~ 10°, so as to facilitate the drainage of
(1)
condensate. The joints of the drainage pipeline must be covered by thermal insulation materials to avoid
generation of exterior condensate. (As shown in Fig. 9.6)
A drainage outlet is located at both the left and right sides of the indoor unit. After selecting one conden-
(2)
sate 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.
(3)
When connecting the drainage pipeline with the unit, do not apply excessive force to the pipeline at the
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side of the unit. The fi xing position of the pipeline shall be near the unit.
Purchase general-purpose hard PVC pipe locally to be used as the drainage pipeline. When carrying out
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connection, place the end of the PVC pipeline into the drainage hole. Use fl exible drainage tube and
tighten it with thread loop. Never use adhesive to connect the drainage hole and the fl exible drainage tube.
When the laid drainage pipeline is used for multiple units, the common pipe shall be about 100mm lower
(6)
than the drainage outlet of each set of unit. A pipe with thicker wall shall be used for such purpose.
Thermal Insulation
Materials of Drainage
Pipeline
Drainage Pipeline
9. 6 Thermal Insulation of Drainage Pipeline
Fig.
CAUTION
The joint of drainage pipeline must not have leakage.
9.6 Testing of Drainage System
After the electrical installation is completed, carry out the testing of the drainage system.
(1)
During the test, check if the water correctly fl ows through the pipelines. Carefully observe the joints to
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ensure that there is no leakage. If the unit is to be installed in a new house, carry out testing before deco-
rating the ceiling.