Haier AB092XCERA Service Manual page 67

2. Installation of air return duct
Use rivets to connect the air return duct to the air return inlet of the indoor unit. The other end
connects to the air return shutter. as shown in Fig.2.
air return
shutter
3. Air duct insulation
Insulation layer is needed for air supply and return duct. First, paste a glue nail to the air duct,
and then attach the insulation cotton that has a tinfoil layer and use the glue nail cover to fix.
Finally, seal the air duct interface with tinfoil adhesive tape closely. as shown in Fig3.
insulating
galvanized
fabric
board
glue nail
Use M8 or M10 suspension screws (4, prepared in the field) (when the suspension screw
height exceeds 0.9 m, M10 size is the only choice). These screws shall be installed as follows
with space adapting to air conditioner overall dimensions according to the original building
structures.
A square wood shall be supported by the beams and then set the suspension screws.
To set with embedded parts, foundation bolts etc.
Knife embedded part
air return
duct
indoor unit
rivet
Fig2: Duct return connected
glue nail cover
adhesive tape
tinfoil
Fig3
Installing the suspension screw
Wooden structure
Square wood
Suspension
screw
New concrete slab
Guide plate embedded part
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Beam
Iron reinforcement
Foundation bolt
Pipe suspension foundation bolt