Bryant Single Package Rooftop Electric Heating/Electric Cooling Unit 558D - Manual (Page 21)

Table 6 — 558D036 Air Delivery — Vertical Discharge Units (Alternate Motor)
AIRFLOW
(Cfm)
ALTERNATE BELT DRIVE MOTOR
External Static Pressure (in. wg)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts
900 581 119 673 179 736 219 805 249 865 288 911 338 957 388 988 428
1000 644 189 709 219 782 279 835 298 900 348 937 378 992 438 1039 487
1100 687 219 746 259 806 298 867 348 929 398 964 398 1013 487 1068 547
1200 733 259 785 318 843 348 903 408 960 467 994 497 1045 557 1090 637
1300 754 288 826 378 891 428 942 477 991 527 1047 597 1075 637 1122 696
1400 810 348 868 448 937 507 984 567 1032 617 1067 666 1110 726 1160 766
1500 841 418 911 527 985 607 1029 656 1073 716 1109 766 1150 816 1190 855
AIRFLOW
(Cfm)
ALTERNATE BELT DRIVE MOTOR
External Static Pressure (in. wg)
0.9 1.0 1.1 1.2
Rpm Watts Rpm Watts Rpm Watts Rpm Watts
900 1039 448 1061 487 1083 527 1105 567
1000 1061 507 1086 547 1111 587 1136 627
1100 1090 577 1109 607 1127 637 1145 666
1200 1109 647 1156 676 1203 706 1250 736
1300 1152 716 1190 756 1228 796 1266 836
1400 1181 806 1237 845 1293 885 1349 925
1500 1225 895 1271 945 1317 995 1363 1044
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 7.)
2. indicates field-supplied motor and drive are required.
3. indicates maximum usable watts of a factory-supplied motor.
4. Maximum usable watts input is 1000. Extensive motor and electrical testing on these units ensures that the full range of the motor can be
utilized with confidence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature motor
failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
5. Values include losses for filters, unit casing, and wet coils.
6. Use of a field-supplied motor may affect wire sizing. Contact your distributor to verify.
7. Alternate motor drive range: 760 to 1090 rpm. All other rpms require field-supplied drive.
8. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .75
Table 7 — 558D048 Air Delivery — Vertical Discharge Units (Standard Motor)
AIRFLOW
(Cfm)
STANDARD DIRECT DRIVE MOTOR
Low Speed High Speed
208 v 230, 460, 575 v 208 v 230, 460, 575 v
ESP Watts ESP Watts ESP Watts ESP Watts
1200 0.93 458 0.94 506 0.94 572 0.99 632
1300 0.86 471 0.87 521 0.87 589 0.92 651
1400 0.78 503 0.79 556 0.79 616 0.87 681
1500 0.70 536 0.73 593 0.73 631 0.80 698
1600 0.61 557 0.64 616 0.66 654 0.76 723
1700 0.51 584 0.54 646 0.58 678 0.68 750
1800 0.40 610 0.44 674 0.51 698 0.63 772
1900 0.29 629 0.37 696 0.46 720 0.56 796
2000 0.25 651 0.30 720 0.39 744 0.50 823
LEGEND
ESP — External Static Pressure (in. wg)
NOTES:
1. Values include losses for filters, unit casing, and wet coils.
2. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with
confidence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature
motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
3. Use of a field-supplied motor may affect wire sizing. Contact your distributor to verify.
4. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .66
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