Unitary Duct Split Unitary Duct Split
11
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.
Fig.12
Table 5 Parts and Components of the Return Air Duct
No.
Name
No.
Name
1
Return Air Louver(with the filter screen)
4
Indoor Unit
2
Canvas Duct
5
Air Supply Duct
3
Return Air Duct
6
Access Grille
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).
Fig.13 Thermal Insulation of the Condensate Pipe
