Table 9 — Fan Performance — 551A155 (With Standard Indoor Fan Motor)
551A155 (12 TONS)*
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| Available External Static Pressure (in. wg) |
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Cfm |
| 0.2 |
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| 0.4 |
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| 0.6 |
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| 0.8 |
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| 1.0 |
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| Rpm | Watts |
| Bhp | Rpm | Watts | Bhp | Rpm | Watts | Bhp | Rpm | Watts | Bhp | Rpm | Watts | Bhp |
3750 | 753 | 915 |
| 1.05 | 786 | 972 | 1.12 | 892 | 1170 | 1.35 | 991 | 1378 | 1.58 | 1084 | 1595 | 1.83 |
4000 | 747 | 977 |
| 1.12 | 810 | 1090 | 1.25 | 911 | 1292 | 1.49 | 1007 | 1503 | 1.73 | 1097 | 1723 | 1.98 |
4250 | 741 | 1041 |
| 1.20 | 835 | 1220 | 1.40 | 932 | 1426 | 1.64 | 1024 | 1640 | 1.89 | 1111 | 1863 | 2.14 |
4500 | 761 | 1158 |
| 1.33 | 861 | 1360 | 1.56 | 954 | 1570 | 1.81 | 1043 | 1788 | 2.06 | 1127 | 2014 | 2.32 |
4750 | 792 | 1305 |
| 1.50 | 887 | 1512 | 1.74 | 977 | 1726 | 1.99 | 1063 | 1948 | 2.24 | 1145 | 2177 | 2.50 |
5000 | 823 | 1464 |
| 1.68 | 915 | 1676 | 1.93 | 1002 | 1894 | 2.18 | 1084 | 2120 | 2.44 | 1164 | 2352 | 2.70 |
5250 | 855 | 1635 |
| 1.88 | 943 | 1852 | 2.13 | 1027 | 2075 | 2.39 | 1107 | 2304 | 2.65 | 1184 | 2539 | 2.92 |
5500 | 887 | 1819 |
| 2.09 | 972 | 2041 | 2.35 | 1053 | 2268 | 2.61 | 1130 | 2501 | 2.88 | — | — | — |
5750 | 920 | 2016 |
| 2.32 | 1002 | 2242 | 2.58 | 1079 | 2473 | 2.84 | — | — | — | — | — | — |
6000 | 953 | 2226 |
| 2.56 | 1031 | 2457 | 2.83 | 1107 | 2692 | 3.10 | — | — | — | — | — | — |
6250 | 986 | 2449 |
| 2.82 | 1062 | 2685 | 3.09 | — | — | — | — | — | — | — | — | — |
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551A155 (12 TONS) (cont)* |
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| Available External Static Pressure (in. wg) |
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Cfm |
| 1.2 |
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| 1.4 |
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| 1.6 |
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| 1.8 |
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| 2.0 |
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| Rpm | Watts |
| Bhp | Rpm | Watts | Bhp | Rpm | Watts | Bhp | Rpm | Watts | Bhp | Rpm | Watts | Bhp |
3750 | 1172 | 1822 |
| 2.10 | 1256 | 2057 | 2.37 | 1337 | 2299 | 2.64 | 1414 | 2549 | 2.93 | — | — | — |
4000 | 1182 | 1952 |
| 2.24 | 1264 | 2188 | 2.52 | 1343 | 2432 | 2.80 | 1418 | 2683 | 3.09 | — | — | — |
4250 | 1194 | 2093 |
| 2.41 | 1274 | 2332 | 2.68 | 1351 | 2577 | 2.96 | — | — | — | — | — | — |
4500 | 1208 | 2247 |
| 2.58 | 1286 | 2487 | 2.86 | — | — | — | — | — | — | — | — | — |
4750 | 1223 | 2412 |
| 2.77 | 1299 | 2655 | 3.05 | — | — | — | — | — | — | — | — | — |
5000 | 1240 | 2590 |
| 2.98 | — | — | — | — | — | — | — | — | — | — | — | — |
5250 | — | — |
| — | — | — | — | — | — | — | — | — | — | — | — | — |
5500 | — | — |
| — | — | — | — | — | — | — | — | — | — | — | — | — |
5750 | — | — |
| — | — | — | — | — | — | — | — | — | — | — | — | — |
6000 | — | — |
| — | — | — | — | — | — | — | — | — | — | — | — | — |
6250 | — | — |
| — | — | — | — | — | — | — | — | — | — | — | — | — |
LEGEND
Bhp — Brake Horsepower
FIOP —
Watts — Input Watts to Motor
*Standard
NOTES:
1.Maximum continuous bhp for the standard motor is 3.13. The max- imum continuous watts is 2700. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.
2.Static pressure losses (i.e., EconoMi$er) must be added to exter- nal static pressure before entering Fan Performance table.
3.Interpolation is permissible. Do not extrapolate.
4.Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.
5.Extensive motor and drive testing on these units ensures that the full bhp and watts range of the motor can be utilized with confi- dence. Using your fan motors up to the watts or bhp rating shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
6.Use of a
