Multi Variable Air Conditioners Duct Type Indoor Unit
16
4.4.2 Shape and Size of Air Outlet and Air-return Opening
As shown in Fig 4.22 is applicable for the models below: GMV-ND22~72PL/B-T, GMV-
ND22~71PLS/B1-T, GMV-ND18~71PLS/C-T.
Fig 4.22
Unit: mm
Model
Dimension of air outlet flange
C D
GMV-ND22~36PL/B-T;
GMV-ND22~36PLS/B1-T;
122 585 200 710
GMV-ND40~63PL/B-T;
GMV-ND40~63PLS/B1-T;
122 885 200 1010
GMV-ND72PL/B-T; GMV-
ND71PLS/B1-T;
122 1185 200 1310
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 4.23.
Fig 4.23
(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.
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