MRV Communications AE09~212FCAKA - Manual (Page 25)

Installation Procedure
24
Installation of indoor unit
Each air return and supply duct should fix to the floor precast slab by using an iron stand. Use glue to
seal the interface closely. Recommend the distance between the air return duct and the wall is more than
150mm.
The distance between air duct outlet and air conditioner outlet is according to the length of actually installed
air duct and in service behavior of the static pressure terminal: Installation sketch map for long and short air
duct is showed below, when connect to short air duct, using low static terminal (terminal color is write), the
distance between air duct outlet and air conditioner outlet is no more than 0.5m; when connect to long air duct,
using middle static terminal (terminal color is red), the distance between air duct outlet and air conditioner outlet
could be within 5m at this point.
When installing the ceiling concealed type indoor unit, a specially designed return air
bellows shall be installed, as shown in Figure 3, Figure 4.
A
Installing building roof
Ceiling
Air supply Air outlet duct
Unit
Return air
Return air bellows
Figure 3
Detail A
Figure 5
M8 broad foundation bolt
M8 suspension screw
M8 broad lock ring
M8 nut
Unit
Air outlet grille
Air supply
No obstacles
within 1 m
Unit
Return air
Return air bellows
*0.5m or*5m
As figure shown, suspend and install the unit.
Drain piping of condensed water should keep a downhill grade of 1% or more. Use insulating pipe to cover
the drain piping of condensed water to keep warmth.
Figure 4
air return shutter
air return duct
sling dog
drain piping
transition
air duct air outlet
duct
air diffuser
joint of air diffuser
Figure 5
Figure 6