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end of air-return duct connects with the air-return louver. In order to adjust the height
conveniently, you can make a folded canvas duct and have it strengthened by 8# iron wire.
(4) Air return from the bottom will produce more noise than air return from the back. So we
suggest you to add a noise damper and static pressure case to lower noise if you choose air
return from the bottom.
(5) Select the appropriate installation way based on actual construction and maintenance needs,
as shown in Fig.5.4.5.
No.
1
Return Air Inlet (with filter)
2
3
5.4.4 Installation of Fresh Air Duct
(1) If a fresh air duct is needed, remove the fresh air baffle as shown in Fig.5.4.6. If a fresh air
duct is not needed, block the gap on the baffle with sponge.
(2) Install circular flange so that fresh air duct can be easily connected, as shown in Fig.5.4.7.
(3) Both air duct and circular flange need to be well-sealed and insulated.
(4) Fresh air should be the air that has been filtered.
Fig.5.4.6
5.5 Installation of Wired Controller
Please refer to User Manual of Wired Controller for the installation details.
NOTE!
When installation is finished, the unit must be tested and debugged before operation. Please
refer to Instruction Manual of ODU for auto addressing and debugging details.
Name
Canvas Duct
Return Air Duct
Multi Variable Air Conditioners Duct Type Indoor Unit
Fig5.4.5
No.
4
5
6
18
Name
Indoor unit
Supply Air Duct
Grille
Fig.5.4.7
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