9
Installation Reference
The air supply ducting work is classified into two ways, one is branched by the square ducts, and the other is
branched by the round ducts. (Be sure to divide the air supply duct into three or more branches.)
4
AIR DUCTING WORK
Connecting method of the duct
1. Supply air side
Using 6 screws, mount the flange to the supply air port of the indoor unit. (Fig. 1)
Make the square duct according to inner dimension of the flange. A x B .
Use a glass wool board with inside/outside finishing by 25mm-thickness and 64kg/m³-density.
Connect the flange and each type of duct. (Fig. 2)
In case of using the square duct, apply the thermal
insulator of thickness by 25mm or more to the duct
board. For the thermal insulator, use high-density
glass wool of weight by 64kg/m
3
.
In case of using the round duct, use the thermal
insulator of thickness by 25mm or more and inner
diameter by 150mm or more to the duct board. (If the
inner diameter is not enough, resistance generates, as
the result, air does not flow smoothly and loss of the
static pressure increases.) For the thermal insulator,
use high-density glass wool of weight by 24kg/m
3
or
equivalent.
( )
Thermal insulator (50mm (w), 6mm (t))
Seal
Thermal insulator :
25mm (w), 6mm (t)
Aluminum tape
(50mm-width)
Square
duct board
(25mm)
25mm
End
Indoor unit
A
B
Fig. 2
Fig. 1
25mm or more
25mm or more
Ø150mm or more
Duct board
Weight of thermal
insulator (glass wool) is
64 kg/m³ or equivalent.
Weight of thermal
insulator (glass wool) is
24 kg/m³ or equivalent.
<Square duct>
<Round duct>
CAUTION
Incomplete thermal insulation of the supply air flange and sealing may occur dewing resulted in falling of water drop.
