DSAFMHP
66
3-38. Caution for Ducting Work
This unit has high static pressure (applicable external
static pressure Max. 167 to 216 pa (17–22 mm Aq).
In the case of small pressure resistance (for
instance, a short duct), install a damper for adjust-
ing air flow volume as air flow volume / air flow
noise increases.
If the air conditioner is to be installed in a room
such as an office or meeting room which needs a
low sound level, provide a supply and return noise
absorption chamber with an acoustic liner.
Include an air filter (field supply) at the return duct.
Indoor Fan Performance
How to Read the Diagram
The vertical axis is the External Static Pressure (mmAq) while the horizontal axis represents the Air Flow
(m
3
/minute). The characteristic curve for the “H,” “Med,” and “Lo” fan speed control.
The nameplate values are shown based on the “H” air flow. Therefore in the case of 25 Type, the flow is
23 m
3
/minute, while the External Static Pressure is 19 mmAq at “H” position. If the external static pressure is too
great (due to long extension of duct, for example), the air flow volume may drop too low at each air outlet.
Exter
n
al
S
tatic Pre
ssu
re
Limit li
n
e
Limit li
n
e
H
H
M
M
L
Air Flow (m
3
/mi
nu
te)
20
0
5
10
15
20
25
25
3
0
(P
a)
50
0
100
150
200
250
(mmAq)
Limit li
n
e
Limit li
n
e
H
H
M
M
L
25
3
0
3
5
Air Flow (m
3
/mi
nu
te)
Exter
n
al
S
tatic Pre
ssu
re
0
5
10
15
20
25
(P
a)
50
0
100
150
200
250
(mmAq)
Limit li
n
e
Limit li
n
e
H
H,M
M
L
3
0
3
5
40
Air Flow (m
3
/mi
nu
te)
Exter
n
al
S
tatic Pre
ssu
re
(P
a)
50
0
100
150
200
250
0
5
10
15
20
25
(mmAq)
25 Ty
p
e
3
6 Ty
p
e
4
8
Ty
p
e
H : At
s
hipme
n
t
NOTE
Fig. 3-121
06-062 Mini ECO-i II for Technibel 2/8/06 4:32 PM Page 66