Characteristics Of Fan - Mitsubishi Heavy Industries SRK25GZ-L1 Handbook

FDU-C

16.2.7 Characteristics of fan

How to interpret the blower characteristics table
Example ¡ What is the Fan Controller's Volume Number setting if, at the high operation speed of FDU308CES (60Hz), it is required
to have 140Pa (14mmAq) outside static pressure at 24m
Move the 140Pa (14mmAq) outside static pressure point to the right as shown in the diagram below. The " a - point", i.e.
where this intersects with the solid curve tracing the 24m
ber. In this example the appropriate Volume Number is "No. 6".
¡ In this situation, a condition of 19.7m
Low Tap and it can be concluded that operation is possible.
Always follow the procedure in " b - Point" to verify that the condition at Low Tap is not outside the Feasible Operation
Airflow Volume Range.
Notes (1) Circled values in the Special Feature Table indicate Fan Controller Volume Numbers. Volume Numbers with no entry are
outside the Feasible Operation Airflow Volume Range and therefore operation is not possible.
(2) The Fan Controller Volume Number is set at "No. 5" when shipped from the assembly plant.
Model FDU308-A (50Hz)
High • Condition of standard rating
Low
200 (20)
150 (15)
100 (10)
50 (5)
2
0 (0)
15 16 18
Lower
limit
Air flow (m
646
3
/min airflow volume at 93Pa (9.3mmAq) outside static pressure can be predicted at
(Air flow : 100 (10) Pa (mmAq)
8
7
6
5
4
Example
of duct
3
8
2
7
6
5
4
3
20 22 24 25
Standard Upper
limit
/min)
3
3 /min airflow volume as the operating point?
3
/min airflow volume upwards, is the appropriate Volume Num-
Model FDU308-A (60Hz)
High
Low
200 (20)
150 (15)
6
100 (10)
93 (9.3) b
5
50 (5)
0 (0)
18 20
Lower
limit
Air flow (m
• Condition of standard rating
(Air flow : 100 (10) Pa (mmAq)
8
7
6
5
Example
of duct
a
7
8
22 24 26
Standard Upper
limit
/min)
3