Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1013

20.2.7 Characteristics of fan
(1) Cassetteria type (FDR)
● External static pressure table
Duct specs.
1 spot (1)
closing
Air flow
3
(m /min)
Stan- High
Type
dard speed
FDR22 type 10 - -
FDR28 type 12 - -
FDR45
14 - -
56 type
FDR71 type 18 30(3) 65(6.5)
FDR90 type 20 25(2.5) 60(6)
FDR112 type
28 40(4) 70(7)
FDR140 type 34 40(4) 70(7)
Notes (1) 1 spot closing: Round duct flange at center is removed and shield with a
special panel (option).
(2) Standard: Ø200 duct 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.
Model FDRJ22HKXE2
120(12)
100(10)
80(8)
60(6)
40(4)
20(2)
[Standard]
1-spot blower internal resistance
Square duct blower internal resistance
Internal resistance without suction panel
Internal resistance without filter
8
Lower
limit
Unit : Pa (mmAq)
(2) (3)
Standard Square duct
(4) (4) (4)
Stan- High Stan- High
dard speed dard speed
45(4.5) 85(8.5) 50(5) 90(9)
45(4.5) 85(8.5) 45(4.5) 85(8.5)
50(5) 85(8.5) 50(5) 90(9)
45(4.5) 80(8) 50(5) 85(8.5)
45(4.5) 80(8) 50(5) 85(8.5)
50(5) 80(8) 55(5.5) 85(8.5)
50(5) 80(8) 55(5.5) 85(8.5)
(0)0
(-2)-20
9 10 11
Upper
limit
Air flow (m 3 /min)
How to interpret the blower characteristics table
Example : Case of FDRJ71HKXE2
40(4)
20(2)
2-spot blower 2-spot blower
internal resistance internal resistance
0(0)
[Standard] [Standard]
3-spot blower 3-spot blower
internal resistance internal resistance
Square duct blower Square duct blower
internal resistance internal resistance
-20(-2)
Internal resistance withoutsuction panel Internal resistance without suction panel
Internal resistance without filter Internal resistance without filter
13 14 16 18
Air flow (m /min)
3
Model FDRJ28HKXE2
100(10)
80(8)
60(6)
40(4)
20(2)
0(0)
[Standard]
2-spot blower internal resistance
Square duct blower internal resistance
Internal resistance without suction panel
Internal resistance without filter
10
Lower
limit
FDC-HKXR
1 2-spot blowout.....................
Internal resistance increases more
than the standard 3-spot blowout.
Approx. 14Pa(1.4mmAq) at
3
17m /min
2 Square duct blowout...........
Internal resistance decreases more
than the standard round duct
(ø200 3-spot). 3Pa (0.3mmAq) at
3
17 m /nin. (External static pres-
sure increases in reverse.)
3 Suction panel.......................
When the suction panel is not
used with the ceiling return type,
the part of internal resistance re-
lated to the panel decrease. 3Pa
20
(0.3mmAq) at 17mm 3 /min.
(0)0
(-2)-20
12 14 15.5
Upper
limit
Air flow (m 3 /min)
1011