CLCH-SVX07C-EN
115
Start-Up
Constant Factor K
The constant factor K is unique for each fan and is primarily a function of the area and the geometry
of the fan inlet. Pre-engineered factors are available from the factory for fan types where the airflow
measurement system is available. See
Table 32
.
Table 32. Constant K Factors
Fan Size (inches)/Type
Fan Class
Fan Name
K-Factor
9 BC
Class I
9 BA
935.0
9 BC
Class II
9 BB
868.2
10 BC
Class I
10 BA
1072.5
10 BC
Class II
10 BB
1072.5
12 AF
Class I
12 AA
2337.5
12 AF
Class II
12 AB
2237.3
15 AF
Class I
15 AA
3873.6
15 AF
Class II
15 AB
3873.6
18 AF
Class I
18 AA
4675.0
18 AF
Class II
18 AB
4675.0
20 AF
Class I
20 AA
5843.7
20 AF
Class II
20 AB
5119.9
22 AF
Class I
22 AA
7513.4
22 AF
Class II
22 AB
6624.1
25 AF
Class I
25 AA
9683.9
25 AF
Class II
25 AB
8891.1
28 AF
Class I
28 AA
12856.2
28 AF
Class II
28 AB
11795.0
32 AF
Class I
32 AA
16295.6
32 AF
Class II
32 AB
16295.6
36 AF
Class I
36 AA
19701.7
36 AF
Class II
36 AB
19367.8
40 AF
1
Class I
40 AA
23374.9
40 AF
2
Class II
40 AA
25378.4
40 AF
1
Class I
40 AB
22974.2
40 AF
2
Class II
40 AB
25044.5
44 AF
Class I
44 AA
30113.0
44 AF
Class II
44 AA
30113.0
49 AF
Class I
49 AB
37470.0
49 AF
Class II
49 AB
37470.0
20 FC
Class I
20 FA
7300.0
20 FC
Class II
20 FB
7203.9
22 FC
Class I
22 FA
9081.9
22 FC
Class II
22 FB
8793.1
25 FC
Class I
25 FA
12030.0
25 FC
Class II
25 FB
11700.0
28 FC
Class I
28 FA
14450.0
28 FC
Class II
28 FB
14036.0
Note:
1
to be used for fan rpm < 700 or cfm < 25,500.
2
To be used for fan rpm > 700 or cfm > 25,500
Summary of Contents for AM4A0A18S11SA Series
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Page 100: ...96 CLCH SVX07C EN Installation Electrical Figure 84 Typical VFD wiring schematic ...
Page 101: ...CLCH SVX07C EN 97 Installation Electrical Figure 85 Typical starter wiring schematic ...
Page 135: ...CLCH SVX07C EN 131 Notes ...
Page 146: ...10 1 2 STEP 8 Lift the Coil section up and away from the Blower section Set aside ...
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