26
ADJUST AIR INLET
Take off the ventilation panel and flange, cut off the
staples at the side rail.
V
When installing the fi lter mesh, please plug it into flange
inclined from the air return ope ning, and then push up.
Once the filter mesh, with the fixing blocks have been
inserted into the flange position holes, the installation
is complete.
Fig. 56 --- Air Supply Outlet
RETURN AIR DUCT INSTALLATION
1. The default installation location of the rectangular flange is
in the back and the return air cover plate in the bottom as
shown in Fig. 57.
Return Air Cover Plate
Downward Return Air
Backward Return Air
Rectangular Flange
Fig. 57 --- Return Air Duct
2. If the downward return air is desired, just change the place
of the rectangular flange and the return air cover plate.
3. 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
reinforcedandfoldedby8#ironwire.
4. More noise is likely to be produced in the downward return
air mode than the backward return air mode. We suggest
installing a muffler and a plenum box to minimize the noise.
5. The i nstallation met hod ca n be chosen with cons i dering the
conditions of the building and maintenance etc. (see Fig. 58).
1
Wind supply
Back wind
Install the back wind pipe (a)
Wind supply
Install the back wind pipe(b)
Back wind
1
2
4
5
3
64
5
Fig. 58 --- Return Air Duct
Ta ble 21—Air Duct
NUMBER NAME NUMBER 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
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