Bryant SINGLE PACKAGE ROOFTOP ELECTRIC COOLING/GAS HEATING UNITS 581A - Manual (Page 16)

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Table 4 — Fan Performance — 581A155225 (Low Heat Units with Optional Indoor Fan Motor)
LEGEND
*Standard low-medium static drive range is 834 to 1064 rpm. Alternate
high-static drive range is 1161 to 1426. Other rpms require a field-
supplied drive.
NOTES:
1. Maximum continuous bhp for the optional motor is 4.38. The maxi-
mum continuous watts is 3775. 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., economizer) must be added to external
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 confidence.
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 field-supplied motor may affect wiring size. Contact your
Bryant representative for details.
CFM
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
3750 753 942 1.08 838 1091 1.25 945 1298 1.49 1044 1513 1.74 1138 1737 2.00
4000 755 1020 1.17 865 1223 1.41 968 1433 1.65 1063 1652 1.90 1154 1878 2.16
4250 788 1159 1.33 894 1366 1.57 992 1581 1.82 1084 1803 2.07 1172 2032 2.34
4500 822 1311 1.51 923 1522 1.75 1017 1740 2.00 1106 1966 2.26 1191 2197 2.53
4750 857 1474 1.70 953 1690 1.94 1044 1912 2.20 1130 2141 2.46 1212 2376 2.73
5000 891 1650 1.90 984 1871 2.15 1071 2097 2.41 1154 2329 2.68 1234 2567 2.95
5250 927 1840 2.12 1015 2065 2.37 1099 2295 2.64 1180 2530 2.91 1257 2771 3.19
5500 962 2042 2.35 1047 2272 2.61 1129 2506 2.88 1207 2745 3.16 1281 2989 3.44
5750 998 2259 2.60 1080 2492 2.87 1159 2730 3.14 1234 2973 3.42 1307 3221 3.70
6000 1035 2489 2.86 1114 2727 3.14 1189 2969 3.41 1262 3215 3.70 1333 3466 3.99
CFM
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
3750 1226 1968 2.26 1311 2206 2.54 1391 2451 2.82 1468 2702 3.11 1543 2959 3.40
4000 1240 2111 2.43 1322 2351 2.70 1401 2598 2.99 1476 2850 3.28 1549 3108 3.57
4250 1255 2267 2.61 1335 2509 2.89 1412 2757 3.17 1486 3011 3.46 — — —
4500 1272 2436 2.80 1350 2680 3.08 1425 2929 3.37 1497 3185 3.66 — — —
4750 1291 2616 3.01 1366 2863 3.29 1440 3115 3.58 1510 3372 3.88 — — —
5000 1310 2810 3.23 1384 3059 3.52 1456 3314 3.81 1525 3573 4.11 — — —
5250 1332 3018 3.47 1403 3269 3.76 1473 3526 4.05 — — — — — —
5500 1354 3238 3.72 1424 3492 4.02 1491 3751 4.31 — — — — — —
5750 1377 3473 3.99 1445 3730 4.29 — — — — — — — — —
6000 1401 3722 4.28 — — — — — — — — — — — —
Bhp — Brake Horsepower
FIOP — Factory-Installed Option
Watts — Input Watts to Motor