GIA giatsu PREMIUM R32 Manuel De L'utilisateur Et D'installation page 57

Installation Instructions
2. 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.25
Fig.25
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., as shown in Fig.26.
5
Supply air
Install the return air duct (a)
Table 7: Installation of the return air duct
No.
Return Air Inlet
Name
(with filter)
Return air
1 2
Canvas
Duct
Rectangular Flange
Rear Return Air
Bottom Return Air
Return Air Cover Plate
4
5
2
Supply air
1
Fig.26 Install the return air duct (b)
3
Return Air
Indoor unit
Duct
21
4 6
Return air
4 5
Supply Air
Duct
3
1
6
Grille