10
EN
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
1. 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
1. 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.
2. Mount the flange to the place from where the cover for return air was removed.
3. Mount the square duct.
4. Arrange the flange and the square duct.
Fig. 2 (b)Fig. 2 (a)
Aluminum tape
(Seal: 50 mm-width)
Thermal insulator with
sticking material
(50 mm-width, 6 mm (t))
Thermal insulator at indoor
unit side
(Stuck already at shipment
from the factory)
Screws (6 pieces)
Indoor unit side
Flange (procured locally)
Seal/thermal insulator with
sticking material
(25 mm-width, 6 mm (t))
Attach by pushing to the
arrow direction.
(Outside corner direction)
Square duct board
(25 mm-thickness,
64 kg/m
3
or equivalent)
Thermal insulator with sticking
material
(50 mm-width, 6 mm-thickness)
Aluminum tape
(Seal: 50 mm-width)
Thermal insulator at indoor
unit side
(Stuck already at shipment
from the factory)
Screws (6 pieces)
Seal/thermal insulator
with sticking material
(25 mm-width, 6 mm (t))
Fit the seal/thermal insulator (25 mm-width, 6 mm-thickness)
by pushing to the arrow direction so that no clearance can be
found between the flange and the round duct.
Flange
Round duct
Thermal insulator
(25 mm-thickness,
24 kg/m
3
or equivalent)
Fit to the arrow
direction by pushing.
Fit to the arrow
direction by pushing.
Square duct Round duct
Cover for return air
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