Gree GMV-ND22PL/B-T Manual Del Propietário página 17

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
GMV-ND40~63PL/B-T
GMV-ND72PL/B-T
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.
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.
No.
1
2
3
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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122
122
Name
Return Air Inlet (with filter)
Canvas Duct
Return Air Duct
885
1185
Fig 4.4.4
Fig 4.4.5
No.
4
5
6
14
200 1000
200 1300
Name
Indoor unit
Supply Air Duct
Grille