Bryant 558D Installation, Start-Up And Service Instructions Manual page 24

Table 12 — 558D036 Air Delivery — Horizontal Discharge Units (Standard Motor)
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500
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:
bhp =
Motor efficiency = .63
Table 13 — 558D036 Air Delivery — Horizontal Discharge Units (Alternate Motor)
AIRFLOW
(Cfm)
0.1
Rpm Watts
900 526 70
1000 570 109
1100 614 149
1200 658 189
1300 703 239
1400 725 288
1500 755 328
AIRFLOW
(Cfm)
0.9
Rpm Watts
900 989 388
1000 1020 438
1100 1052 487
1200 1076 527
1300 1090 607
1400 1108 666
1500 1117 696
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 4.)
2. 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.
3. Values include losses for filters, unit casing, and wet coils.
4. Alternate motor drive range: 760 to 1090 rpm. All other rpms require field-supplied drive.
5. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .75
Low Speed
208 v
ESP Watts ESP
0.72 253 0.75
0.67 270 0.69
0.61 287 0.63
0.57 304 0.58
0.51 321 0.53
0.44 338 0.46
0.39 355 0.41
LEGEND
watts input x motor efficiency
746
0.2 0.3
Rpm Watts Rpm Watts
584 99 656 139
627 149 736 189
670 189 758 229
710 229 780 279
752 269 808 318
776 308 845 378
816 378 870 428
ALTERNATE BELT DRIVE MOTOR
External Static Pressure (in. wg)
1.0
Rpm Watts Rpm
1028 438 1074
1064 477 1124
1100 527 1163
1136 577 1201
1172 647 1239
1208 706 1278
1245 776 1315
STANDARD DIRECT DRIVE MOTOR
230, 460, 575 v 208 v
Watts ESP
277 0.73
292 0.70
307 0.64
323 0.56
338 0.53
354 0.47
369 0.43
ALTERNATE BELT DRIVE MOTOR
External Static Pressure (in. wg)
0.4 0.5
Rpm Watts Rpm Watts
734 219 818 269
800 259 848 288
812 288 863 308
840 318 889 358
868 368 916 408
891 418 937 467
924 477 969 527
1.1 1.2
Watts Rpm Watts
487 1120
537 1185
587 1225
647 1266
716 1306
786 1347
865 1385
—24—
High Speed
230, 460, 575 v
Watts ESP Watts
307 0.76 363
321 0.71 374
335 0.65 385
349 0.59 397
364 0.54 408
378 0.48 420
392 0.43 431
0.6 0.7
Rpm Watts Rpm
875 269 924
895 308 936
914 348 960
938 398 988
963 448 1012
983 507 1027
1014 577 1056
537
597
647
716
786
865
955
0.8
Watts Rpm Watts
308 953 348
348 977 388
388 1005 428
448 1038 497
507 1061 557
557 1071 597
627 1097 676