Carrier 50TCQD17-D24, Service And Maintenance Instructions, Page: 53 / 60

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APPENDIX V. FAN PERFORMANCE
General Fan Performance Notes:
1. Interpolation is permissible. Do not extrapolate.
2. External static pressure is the static pressure difference between the return duct and the supply duct plus the static
pressure caused by any FIOPs or accessories.
3. Tabular data accounts for pressure loss due to clean filters, unit casing, and wet coils. Factory options and accessories
may add static pressure losses.
4. The Fan Performance tables offer motor/drive recommendations. In cases when two motor/drive combinations would
work, Carrier recommends the lower horsepower option.
5. For information on the electrical properties of Carrier’s motors, please see the Electrical information section of this
book.
6. For more information on the performance limits of Carrier’s motors, please see the Application Data section of this
book.
Table 18. Economizer -- Vertical and Horizontal Duct Configuration
Model Sizes 17 and 24
CFM 4500 5000 5500 6000 6500 7000 7500 8000
0.047 0.052 0.057 0.062 0.067 0.072 0.077 0.082
Model Sizes 17 and 24
CFM 8500 9000 9500 10000 10500 11000 11500 12000 12500
0.088 0.093 0.098 0.103 0.109 0.114 0.119 0.125 0.131
Table 19. Electric Heaters -- Vertical and Horizontal Duct Configuration
Model Sizes 17 and 24
CFM 4500 5000 5500 6000 6500 7000 7500 8000
25 kW Heater 0.010 0.010 0.015 0.020 0.025 0.030 0.035 0.040
50 kW Heater 0.020 0.020 0.030 0.040 0.050 0.060 0.070 0.080
75 kW Heater 0.030 0.040 0.050 0.060 0.070 0.080 0.100 0.120
Model Sizes 17 and 24
CFM 8500 9000 9500 10000 10500 11000 11500 12000 12500
25 kW Heater 0.045 0.050 0.055 0.060 0.070 0.080 0.090 0.100 0.105
50 kW Heater 0.090 0.100 0.120 0.130 0.150 0.160 0.180 0.200 0.230
75 kW Heater 0.140 0.150 0.180 0.200 0.230 0.250 0.270 0.300 0.330