Constant K-Factors - Trane Climate Changer TCFS Nstallation, Operation, And Maintenance

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Constant K-Factors

The constant factor K is unique for each fan and is
primarily a function of the area and other geometric
properties of the fan inlet. Pre-engineered factors are
Table 6. Constant K-Factor for Twin City Fans
Size
122
150
165
182
200
222
245
270
300
330
365
402
445
490
542
600
660
730
807
890
982
Table 7. Constant K-Factors for Trane SDDP™ Fans
Trane SDDP Fans
10.50 AF stacked direct-drive plenum
12 AF stacked direct-drive plenum
13.5 AF stacked direct-drive plenum
15 AF stacked direct-drive plenum
16 AF stacked direct-drive plenum
18 AF stacked direct-drive plenum
20 AF stacked direct-drive plenum
22 AF stacked direct-drive plenum
24.5 AF stacked direct-drive plenum
When a single transmitter is supplied in a multiple fan
system, one or more fans will be brought back to the
transmitter as a manifold and the airflow will represent the
60
Model EPF/EPQ Model EPFN/EPQN
Arrangement 1 Arrangement 4
911.46
1163.68
1464.80
1757.39
2108.38
2617.81
3168.67
3856.03
4770.07
5757.23
7032.01
8555.41
10,444.42
12,669.80
15,541.11
19,004.71
22,994.79
28,128.04
K Factor
630.00
839.00
952.00
1139.00
1361.00
1673.00
1942.00
2849.00
3590.00
available from the factory for fan types where the airflow
measurement system is available.
Refer to unit submittals or
piezometer K-Factors for our most commonly used fans.
Model BAE DWDI
944.92
1206.40
1518.58
1821.92 3793.22
2185.80 4550.82
2713.93 5650.38
3285.02 6839.38
3997.61 8322.99
4945.21 10,295.89
5968.62 12,426.62
7290.21 15,178.15
8869.55 18,466.31
10,827.92 22,543.63
13,135.01 27,346.98
16,111.75 33,544.50
19,702.52 41,020.47
23,839.12 49,632.82
29,160.84 60,712.61
74,233.52
90,279.75
110,113.94
total airflow for the system. As a result, the factor should
be adjusted as follows:
K = N * K-Factor from
Where:
K = The final factor to be used for controller
programming.
N = The number of active
*
If a fan fails in a multiple fan system where only one
transmitter is being supplied, and if the remaining fans will
continue to be used, the factor should be reduced
accordingly. Additionally, if the inactive fan was included
in the manifold back to the transmitter, the tubes from the
inactive fan should be temporarily removed and replaced
with tubes from an active fan (or simply plugged).
When a transmitter is supplied for each fan, the factor does
not need to be adjusted. The resulting airflow will
represent single-fan airflow. At the controller level, the
individual airflows should be summed to get the total
Table 6 and Table 7 for
Model MPQN
793.96
1189.43
1439.60
1821.92
2185.80
2713.93
3285.02
3997.61
4945.21
5968.62
7290.21
8869.55
10,827.92
13,135.01
Table 6 and Table 7.
*
fans in the system.
CLCH-SVX010A-EN