1. Drill a hole in the wall and insert the connecting pipe and wire through a PVC wall-through tube
purchased locally. The wall hole shall be with a outward down slope of at least 1/100. (See
Figure 1)
2. Before drilling check that there is no pipe or reinforcing bar just behind the drilling position.
Drilling shall avoid at positions with electric wire or pipe.
3. Mount the unit on a strong and horizontal building roof. If the base is not firm, it will cause
noise, vibration or pipe broken and refrigerant leakage (see Figure 6).
4. Support the unit firmly.
5. Change the form of the connection pipe, connection wire and drain pipe so that they can go
through the wall hole easily.
5. Installation procedure
When installing the ceiling concealed type indoor unit, a specially designed return air bellows
shall be installed, as shown in Figure 3, Figure 4.
Figure 3
Figure 4
A
Installing building roof
Ceiling
Air supply Air outlet duct
Unit
Return air
Return air bellows
Air outlet grille
Air supply
No obstacles
within 1 m(0Pa)
Unit
Return air
Return air bellows
0.5m(0Pa)or 5m(50Pa)
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.
Fig 1
-65-
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