Specifications
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32
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2.7 Characteristics of fan
(1) Cassetteria type (FDR)
• External static pressure table
How to interpret the blower characteristics table
Example : Case of FDR308-A
1 2-spot blowout.....................
Internal resistance increases more
than the standard 3-spot blowout.
Approx. 14 Pa at 17m
3
/min.
2 Square duct blowout...........
Internal resistance decreases
more than the standard round
duct (ø200 3-spot). 3 Pa at 17 m
3
/
nin. (External static pressure
increases in reverse.).
3 Decorative panel...................
When the decorative panel is not
used with the ceiling return type,
the part of internal resistance
related to the panel decrease. 3 Pa
at 17mm
3
/min.
Model FDR258-A
Unit: Pa
FDR208-A
FDR258-A
FDR308-A
FDR408-A
FDR508-A
Type
Air flow
(m
3
/min)
Duct specs.
1 spot closing
(1)
Standard
(2)
Square duct
(3)
Stan-
dard
High
speed
(4)
High
speed
(4)
High
speed
(4)
Stan-
dard
Stan-
dard
14
18
20
28
34
—
30
25
40
40
—
65
60
70
70
50
45
45
50
50
85
80
80
80
80
50
50
50
50
55
90
85
85
85
85
Notes (1) 1 spot closing: Round duct flange at center is removed and shield
with a decorative panel (option).
(2) Standard: ø200 ducts are installed at all blowout holes.
(3) Square duct: All round ducts are removed and replaced with special
square duct flanges (option).
(4) When operating at a high speed, invert the connection of white
and red connectors on the flank of control box.
[Standard]3-spot blower
internal resistance
Internal resistance without suction panel
Internal resistance without filter
Square duct blower internal resistance
2
-
s
p
o
t
s
b
lo
w
e
r
in
te
r
n
a
l r
e
s
is
ta
n
c
e
•
H
igh
Standard
•
Low
14
40
20
0
–20
17 20 22
Air flow (m
3
/min)
Static pressure (Pa)
Internal resistance without suction panel
Internal resistance without filter
Square duct blower internal resistance
[Standard] 2-spot blower internal resistance
H
igh speed
•
H
igh
High speed
•
Upper limit
H
ig
h
sp
eed
•
L
ow
er lim
it
High speed
•
Low
Standard
•
Upper limit
Standard
•
Low
S
tan
d
ard
•
H
ig
h
Static pressure (Pa)
Lower
limit
Uppe
r
limit
Air flow (m
3
/min)
10
–20
0
20
40
60
80
100
120
12 14 15.5
Internal resistance without suction panel
Internal resistance without filter
Square duct blower internal resistance
[Standard] 3-spot blower internal resistance
2-spot blower internal resistance
H
igh speed
•
H
igh
H
igh speed
•
U
pper lim
it
H
igh speed
•
Lower lim
it
H
igh speed
•
L
o
w
Standard
•
U
pper lim
it
Standard
•
Low
Standard
•
High
Static pressure (Pa)
Lower
limit
Upper
limit
Air flow (m
3
/min)
13
–20
0
20
40
60
80
100
120
14 16 18 20
Model FDR208-A