4
4
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3-WAY FLOW LOGIC Unit Specifications
7. Concealed Duct Hi
g
h Static Pressure Type
Exter
nal Static Pressure (mmAq)
Limit line
Limit line
H
H,M
M
L
30
0
5
10
15
20
25
35
40
(P
a)
50
100
150
200
Air Flow (m
3
/minute)
Exter
nal Static Pressure (mmAq)
Limit line
Limit line
H
H
M
M
L
25
0
5
10
15
20
25
30
35
(P
a)
50
100
150
200
Air Flow (m
3
/minute)
Exter
nal Static Pressure (mmAq)
Limit line
Limit line
H
H
M
M
L
Air Flow (m
3
/minute)
20
0
5
10
15
20
25
25
30
(P
a)
50
100
150
200
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 name plate values are shown based on the “H” air flow. Therefore in the case of the 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.
24 Type
36 Type
48 Type
7-6. Indoor Fan Performance
04-218 Airwell-4_6-7.qxp 01/06/2007 13:24 Page 122