Unitary Duct Split Unitary Duct Split
and the other to the return air louver. For the sake of the convenience to freely adjust
the height, a cutting of canvas duct will be helpful, which can be reinforce and folded by
8#iron wire.
d. More noise is likely to be produced in the downward return air mode than the
backward return air mode, so it is suggestive to install a silencer and a plenum box to
minimize the noise.
e. The installation method can be chose with considering the conditions of the
building and maintenance etc., as shown in Fig.12.
No.
1
Return Air Louver(with the filter screen)
2
3
8 Installation of the Condensate Pipe
a. The condensate pipe should keep a inclination angle of5~10° , which can
facilitate the drainage of the condensate water. And the joints of the condensate pipe
should be insulated by the insulation material to prevent condensing(see Fig.13).
Table 5
Parts and Components of the Return Air Duct
Name
Canvas Duct
Return Air Duct
Fig.13 Thermal Insulation of the Condensate Pipe
Fig.12
No.
4
5
6
11
Name
Indoor Unit
Air Supply Duct
Access Grille