10
2. Return air side
Caution for Safety
When you do not connect the duct to the return air side (using steel and others), apply a protective measures so that
your hands or fingers do not directly touch with the motor or other electric parts.
2-1. Return air from rear side
Follow the procedure same as that for the supply air side.
Flange mounting → Square duct making → Connecting work
2-2. Return air from lower side
Remove the cover for return air at the lower side of the indoor unit, and attach the cover to the opening port at
the rear side of the indoor unit.
Mount the flange to the place from where the cover for return air was removed.
Mount the square duct.
Arrange the flange and the square duct.
<Square duct> <Round duct>
Cover for return air
Thermal insulator with
sticking material
(50mm-width, 6mm (t))
Aluminum tape
(Seal : 50mm-width)
Aluminum tape
(Seal : 50mm-width)
Square duct board
25mm-thickness,
64kg/m³ or equivalent
Thermal insulator
with sticking material
(50mm-width, 6mm-thickness)
Screws
(6 pieces)
Screws
(6 pieces)
Flange
(procured locally)
Indoor unit side
Thermal insulator
at indoor unit side
Stuck already at
shipment from the factory
Fit to the arro
Fit to the arrow
direction by pushing.
Seal/thermal insulator
with sticking material
(25mm-width, 6mm (t))
Seal/thermal insulator
with sticking material
(25mm-width, 6mm (t))
( )
( )
Thermal insulator
at indoor unit side
Stuck already at
shipment from the factory
( )
Attach by pushing to
the arrow direction.
(Outside corner direction)
( )
Thermal insulator
25mm-thickness,
24kg/m³ or equivalent
Round duct
Flange
Fit the seal/thermal insulator (25mm-width, 6mm-thickness)
by pushing to the arrow direction so that no clearance can
be found between the flange and the round duct.
Fig. 2 (a)
Fig. 2 (b)
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