Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
14
GMV-ND40~63PL/B-T
122
885
200
1000
GMV-ND72PL/B-T
122
1185
200
1300
4.4.3 Installation of Air-return Duct
1
Square flange is defaulted to be fitted on the back before ex-factory. Air-return cover is on the
bottom, as shown in Fig.4.4.4.
Fig 4.4.4
2
If air return from the bottom is needed, switch the positions of square flange and air-return cover.
3
Use a clincher to connect air-return duct to the air-return opening of indoor unit. The other 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.4.4.5.
Fig 4.4.5
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 Fresh Air Duct
1
If a fresh air duct is needed, remove the fresh air baffle as shown in Fig.4.4.6. 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.4.4.7.
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.
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