Installation Instructions
8
Table 4 Dimensions of the Air Supply Outlet and Return Air Inlet (unit: mm)
Item
Model
Air Supply Outlet
Return Air Inlet
A
B
C
D
CHML-ID09NK
156
662
580
162
CHML-ID12NK
CHML-ID18NK
156
862
780
162
CHML-ID21NK
156
1062
980
162
CHML-ID24NK
7 Installation of the Return Air Duct
a. The default installation location of the rectangular flange is in the back and the return air cover plate is
in the bottom, as shown in Fig.11.
Rectangular Flange
Backward Return Air
Downward Return Air
Return Air Cover Plate
Fig.11
b. If the downward return air is desired, just change the place of the rectangular flange and the return air
cover plate.
c. Connect one end of the return air duct to the return air outlet of the unit by rivets 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.
1
2
5
4
4
6
1
5
3
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
