Multi Variable Air Conditioners Ducted Type Indoor Unit
1
4
No.
Name
No.
Name
1
Hanger Rod
5
Static Pressure Box
2
Return Air Duct
6
Filter
3
Canvas Duct
7
Main Supply Air Duct
4
Return Air Inlet
8
Supply Air Outlet
4.4.3 Installation of the Return Air Duct
(1) The default installation location of the rectangular flange is at the back and the return air
cover plate is at the bottom, as shown in Fig 4.4.6.
Fig 4.4.6
(2)
If the bottom return air is desired, just change
t
he rectangular flange
with
the
return air
cover plate.
(3)
Connect one end of the return air duct to the return air outlet of the unit
with
rivets and the
other to the return air louver.
Use reinforced
canvas duct
for easy adjustment of duct.
(4)
More noise is likely to be produced in the bottom return air mode than the rear return air
mode, install a silencer and a static pressure box to minimize the
noise.
(5)
Choose the
best
installation method
by
considering the
building conditions and
accessibility needed
maintenance etc., as shown in Fig 4.4.7.
Fig 4.4.7
Table 5 Installation of the return air duct
No.
Name
No.
Name
1
Return Air Inlet (with filter)
4
Indoor unit
2
Canvas Duct
5
Supply Air Duct
3
Return Air Duct
6
Grille
4.4.4 Installation of the Fresh Air Pipe
(1) When the fresh air pipe is needed to be connected, cut the fresh air baffle as Fig 4.4.8.
