Toshiba RAM-SM560AT-E Service Manual page 74

4
AIR DUCTING WORK
Installation Reference
The air supply ducting work is classified in two ways, one is branched by the round ducts, and the other is branched
by the square ducts. (Be sure to divide the air supply duct into three or more branches.)
<Round duct>
In case of the round duct, use the thermal insulator of
thickness 25mm or more and inner diameter 150mm
or more to the duct board.
(If the inner diameter is not enough, resistance
increase, 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 24kg/m
equivalent.
25mm or more
Connecting method of the duct
1. Supply air side
<Round duct>
Thermal insulator
with sticking material
(50mm-width, 6mm-thickness)
Aluminum tape
(Seal : 50mm-width)
Fit to the arrow Fit to the arro Fit to the arrow w
direction by pushing. direction by pushing.
Round duct
Thermal insulator
25mm-thickness,
( )
24kg/m³ or equivalent
Fit the seal/thermal insulator (25mm-width, 6mm-thickness)
by pushing to the arrow direction so that no gap can be
found between the flange and the round duct.
Fig. 2 (a)
Incomplete thermal insulation of the supply air flange and sealing may cause dew drops.
(exp. for RAV-SM800BT-E model)
3
or
Density of thermal
insulator (glass wool) is
24 kg/m³ or equivalent.
Ø150mm or more
Thermal insulator
at indoor unit side
Stuck already at
(
shipment from the factory
Screws
(6 pieces)
Seal/thermal insulator
Flange
with sticking material
(25mm-width, 6mm (t))
<Square duct> (Reference for square duct)
When using the square duct, change the type of the air
supply flange from round type to square flange at the
local site.
In case of the square duct, apply the thermal insulator
of thickness 25mm or more to the duct board. For the
thermal insulator, use high-density glass wool of
weight 64kg/m
Duct board
<Square duct>
Thermal insulator with
sticking material
(50mm-width, 6mm (t))
)
Aluminum tape
(Seal : 50mm-width)
Fit to the arrow Fit to the arrow w Fit to the arro
direction by pushing. direction by pushing.
Attach by pushing to
the arrow direction.
(Outside corner direction)
Square duct board
25mm-thickness,
(
64kg/m³ or equivalent
CAUTION
71
3
.
Density of thermal
insulator (glass wool) is
64 kg/m³ or equivalent.
25mm or more
Thermal insulator
at indoor unit side
Stuck already at
(
shipment from the factory
Flange
(procured locally)
Seal/thermal insulator
with sticking material
(25mm-width, 6mm (t))
)
Fig. 2 (b)
)
Screws
(6 pieces)
Indoor unit side