30
Installation Manual
b. Installation of the Air Supply Duct
1. Installation of the rectangular air supply duct
No.
Name
No.
Name
1
Hanger
5
Filter
2
Air Intake Pipe
6
Main Air Supply Pipe
3
Canvas Air Pipe
7
Air Supply Outlet
4
Air Intake
● The maximum length of the duct means the maximum length of the supply air duct plus the maximum length of the return air duct.
● The duct is rectangular and connected with the air inlet/outlet of the indoor unit. Among all supply air outlets, at least one should be kept open.
CAUTION!
2. The default installation location of the rectangular flange is at the back and the return air cover plate is at the bottom.
Rectangular Flange
Rear Return Air
Bottom Return Air
Return Air Cover Plate
3. If the bottom return air is desired, just change the place of the rectangular flange and the return air cover plate.
4. 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 reinforced and folded by 8# iron wire.
5. More noise is likely to be produced in the bottom return air mode than the backward return air mode, so it is suggested to install a
silencer and a static pressure box to minimize the noise.
6. The installation method can be chosen with considering the conditions of the building and maintenance etc.,
1
1
2
4
5
3
6
4
5
Supply air
Supply air
Return air
Return air
No.
1
2
3
4
5
6
Name
Return Air Inlet (with filter)
Canvas Duct
Return Air Duct
Indoor unit
Supply Air Duct
Grille
Table 7: Installation of the return air duct
Install the return air duct (a)
Install the return air duct (b)
Filter Installation
1. Put the buckle into the metal sheet at the air inlet upside of the unit.
filter
Buckle
