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CAUTION
• The air supply pipe, the air intake pipe and the fresh air pipe must be covered with a layer of thermal
insulation, so as to avoid thermal leakage and condensation. Firstly apply liquid nail on the pipes, then
attach the thermal insulation cotton with a layer of tinfoil. Use the liquid nail cover to fix it. Lastly use tinfoil
adhesive tape to carefully seal the joints. Other good thermal insulation materials can also be used.
• The air supply pipes and the air intake pipes shall be fixed to the prefabricated boards of the ceiling by
using iron supports. The joints of the pipes must be sealed by glue so as to avoid leakage.
• The design and installation of air pipes must be in conformity with the relevant state engineering criteria.
• The edge of the air intake pipe must be at least 150mm away from the wall. The air intake must be covered
with fi lter.
• Silencing and shock absorption shall be considered in the design and installation of the air pipes. Addition-
ally, the noise source must be far away from where people stay. The air intake shall not be located above
the place where users stay (offices and rest places, etc.).
8.7 Installation of Drainage Pipe line
(1) The drainage pipeline shall be installed with an inclining angel of 5 ~ 10°, so as to facilitate the drainage of
condensate. The joints of the drainage pipeline must be covered by thermal insulation materials to avoid
generation of exterior condensate. (As shown in Fig. 8.10)
(2) 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.
(3) When shipped out from factory, both the drainage outlets are blocked by rubber plugs.
(4) When connecting the drainage pipeline with the unit, do not apply excessive force to the pipeline at the
side of the unit. The fixing position of the pipeline shall be near the unit.
(5) Purchase general-purpose hard PVC pipe locally to be used as the drainage pipeline. When carrying out
connection, place the end of the PVC pipeline into the drainage hole. Use flexible drainage tube and
tighten it with thread loop. Never use adhesive to connect the drainage hole and the flexible drainage tube.
(6) When the laid drainage pipeline is used for multiple units, the common pipe shall be about 100mm lower
then
the drainage outlet of each set of unit. A pipe with thicker wall shall be used for such purpose.
CAUTION
The joint of rainage pipeline must not have leakage.
d
30
Fig.8.10 Thermal Insulation of Drainage Pipeline
Thermal Insulation
Materials of Drainage
Pipeline
Drainage Pipeline
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