Toshiba RAS-M10GDCV-E Installation Manual page 11

4
AIR DUCTING WORK
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.)
<Square duct>
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
Duct board
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
Use a glass wool board with inside/outside finishing by 25mm-thickness and 64kg/m³-density.
ƒ
Connect the flange and each type of duct. (Fig. 2)
B
Incomplete thermal insulation of the supply air flange and sealing may occur dewing resulted in falling of water drop.
3
.
Weight of thermal
insulator (glass wool) is
64 kg/m³ or equivalent.
25mm or more
Fig. 1
<Round duct>
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
equivalent.
25mm or more
Thermal insulator (50mm (w), 6mm (t))
Aluminum tape
(50mm-width)
25mm
Square
duct board
(25mm)
CAUTION
9
Weight of thermal
insulator (glass wool) is
24 kg/m³ or equivalent.
Ø150mm or more
B .
Seal
Thermal insulator :
(
25mm (w), 6mm (t)
End
Indoor unit
Fig. 2
3
or
)