GREE ELECTRIC GUHD09NK3CO Service Manual page 78

U-Match Series DC
Inverter Service Manual
b. Testing of Drainage System
After the electrical installation is completed, carry out the testing of the drainage system.
there is no leakage. If the unit is to be installed in a new house, carry out testing before decorating the ceiling.
c. Matters of Attention
The joint of Drainage Pipeline must not have leakage.
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 Figure 1-1-10)
1.1.7 Installation of air duct and round duct for duct-type unit
Caution:
The supply air duct, the return air duct and the fresh air duct must be covered with a layer of thermal insulation,
so as to avoid thermal leakage and condensation. Firstly apply liquid nail on the duct, and then attach the thermal
seal the joints; other good thermal insulation materials can also be used.
supports. The joints of the pipes must be sealed by glue so as to avoid leakage.
The design and installation of air duct must be in conformity with the relevant state engineering criteria.
The edge of the return air duct must be at least 150mm away from the wall. The return air inlet must be covered
Silencing and shock absorption shall be considered in the design and installation of the air duct. Additionally,
the noise source must be far away from where people stay. The return air inlet shall not be located above the place
a. Installation of supply air duct
Installation of rectangular air duct, as shown in Fig. 1-1-11
75
Figure 1-1-9
Figure 1-1-10
Figure 1-1-11