Gree VRF Fresh Air Serie El Manual Del Propietario página 19

Multi Variable Air Conditioners Duct Type Indoor Unit
◆ Size of air-return opening
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 4.4.9.
(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 4.4.10.
5
Supply ai r
Install the Return Air Duct (a)
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Fig 4.4.8
Bottom Return Air
Fig 4.4.9
5
4
2
Supply ai r
1
Return air
Fig 4.4.10
16
Rectangular Flange
Rear Return Air
Return Air Cover Plate
4 6
Install the Return Air Duct (b)
555
3
1
Return air