Specifications
25
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
NOTES:
1.
Boldface
indicates a field-supplied drive is required. (See Note 6.)
2. indicates field-supplied motor and drive are required.
3. Maximum continuous bhp is 1.20 for standard motors; 2.40 for high-static
motors. 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 ratings shown will not result in nuisance tripping or prema-
ture motor failure. Unit warranty will not be affected. For additional informa-
tion on motor performance, refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
4. Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact Bryant repre-
sentative to verify.
6. Motor drive range: 840 to 1185 rpm for standard motors; 1075 to 1455 rpm
for high-static motors. All other rpms require field-supplied drive.
7. Interpolation is permissible. Do not extrapolate.
551B048 (4 TONS) — STANDARD MOTOR (BELT DRIVE)
Airflow
(Cfm)
External Static Pressure (in. wg)
0.1 0.2 0.3 0.4 0.6 0.7 0.8
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
1200 542 0.16 616 0.21 678 0.27 739 0.32
842 0.44 886 0.50 929 0.56
1300 576 0.20 644 0.25 704 0.31 764 0.37
867 0.50 910 0.56 952 0.62
1400 610 0.24 673 0.30 732 0.36 791 0.42
889 0.55 933 0.62 976 0.69
1500 646 0.28 704 0.35 761 0.42 818 0.48
912 0.61 957 0.69 1001 0.76
1600 681 0.33 735 0.40 790 0.47
845 0.54 920 0.68 931 0.76 1023 0.83
1700 718 0.39 768 0.46 836 0.54
873 0.61 965 0.76 1005 0.84 1045 0.91
1800 754 0.45 801 0.53
851 0.61 900 0.69 992 0.84 1032 0.92 1071 1.00
1900 791 0.52 836 0.60
832 0.69 828 0.77 1019 0.93 1058 1.02 1097 1.10
2000 828 0.60
870 0.68 864 0.77 858 0.86 1046 1.03 1085 1.12
1124 1.21
551B048 (4 TONS) — STANDARD MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
External Static Pressure (in. wg)
1.0 1.1 1.2 1.4 1.6 1.8
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
1200
1008 0.67 1052 0.73 1096 0.78 1134 0.89
1203 1.00
——
1300
1029 0.75 1065 0.81 1101 0.86 1174 1.01
1229 1.15
1277 1.27
1400
1052 0.83 1087 0.90 1121 0.96 1183 1.09
1255 1.22 1305 1.38
1500
1076 0.91 1111 0.99 1145 1.06
1208 1.20 1274 1.33 1337 1.47
1600
1100 1.00 1134 1.08 1168 1.15
1232 1.31 1291 1.46 1350 1.60
1700
1124 1.09 1158 1.17
1192 1.25 1255 1.42 1314 1.58 1370 1.77
1800
1147 1.18
1182 1.27 1217 1.36 1279 1.54 1381 1.71 1393 1.89
1900
1169 1.27 1205 1.37 1240 1.47 1303 1.66 1408 1.85 1417 2.03
2000
1194 1.38 1228 1.48 1262 1.58 1327 1.78 1436 1.98 1440 2.18
551B048 (4 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
External Static Pressure (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
1200 618 0.21 739 0.32 842 0.44 928 0.56 1008 0.67
1300 644 0.25 764 0.37 867 0.50 952 0.62 1029 0.75
1400 673 0.30 791 0.42 889 0.55 976 0.69 1052 0.83
1500 704 0.35 818 0.48 912 0.61 1001 0.76
1076 0.91
1600 736 0.40 845 0.54 920 0.68 1023 0.83
1100 1.00
1700 768 0.46 873 0.81 965 0.76 1045 0.91
1124 1.09
1800 801 0.52 900 0.69 892 0.84 1071 1.00
1147 1.18
1900 836 0.60 928 0.77 1019 0.93
1097 1.10 1169 1.27
2000 870 0.68 968 0.86 1046 1.03
1124 1.21 1194 1.38
551B048 (4 TONS) — HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
External Static Pressure (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
1200
1096 0.78 1134 0.89 1203 1.00 1232 1.07 1258 1.14
1300
1101 0.86 1174 1.01 1229 1.15 1277 1.27 1304 1.35
1400
1121 0.96 1183 1.09 1255 1.22 1305 1.38 1333 1.47
1500
1145 1.06 1208 1.20 1274 1.33 1337 1.47 1365 1.57
1600
1168 1.15 1232 1.31 1291 1.46 1350 1.60 1379 1.70
1700
1192 1.25 1255 1.42 1314 1.58 1370 1.77 1399 1.89
1800
1217 1.36 1279 1.54 1381 1.71 1383 1.89 1423 2.01
1900
1240 1.47 1303 1.66 1408 1.85 1417 2.03 1447 2.16
2000
1262 1.58 1327 1.78 1436 1.98 1440 2.18
1471 2.32
Bhp —
Brake Horsepower Input to Fan
FIOP —
Factory-Installed Option