Haier SYJS-0308 Service Manual page 117

Indoor unit
2. Installation for 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
Installing the suspension screw:
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.
Wooden structure
A square wood shall be supported by the beams and then set the suspension screws.
New concrete slab
To set with embedded parts, foundation bolts etc.
transitive air duct
flexible joint
or static pressure box
Fig1: Duct connected
air return
duct
indoor unit
rivet
Fig2: Duct return connected
glue nail cover
adhesive tape
tinfoil
Square wood
Suspension
screw
circular air duct
joint of air diffuser
air diffuser
Beam