2. Installation of air return duct
3. Air duct insulation
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.
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.
indoor unit
air return
shutter
rivet
air return
duct
Fig2: Duct return connected
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.
galvanized
board
glue nail
insulating
fabric
tinfoil
adhesive tape
glue nail cover
Fig3
Installing the suspension screw
Wooden structure
A square wood shall be supported by the beams and then set the suspension screws.
Square wood
Suspension
screw
Beam
New concrete slab
To set with embedded parts, foundation bolts etc.
Iron reinforcement
Knife embedded part
Foundation bolt
Guide plate embedded part
Pipe suspension foundation bolt
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