Specs

11
PERFORMANCE DATA
FB4C AIRFLOW PERFORMANCE (CFM)
MODEL & SIZE BLOWER SPEED 0.10 0.20 0.30 0.40 0.50 0.60
FB4C 018
Tap 5 767 739 702 669 620 565
Tap 4 614 569 534 486 436 398
Tap 3 701 660 616 581 537 499
Tap 2 614 569 534 486 436 398
Tap 1 410 350 304 261 228 203
FB4C 024 & 025
Tap 5 969 936 892 835 763 676
Tap 4 826 795 766 743 706 660
Tap 3 826 795 766 743 706 660
Tap 2 701 660 616 581 537 499
Tap 1 617 592 552 507 472 420
FB4C 030
Tap 5 1108 1090 1065 1034 1009 974
Tap 4 1026 1000 969 938 899 865
Tap 3 1026 1000 969 938 899 865
Tap 2 909 873 842 799 762 724
Tap 1 825 795 757 722 674 634
FB4C 036
Tap 5 1301 1276 1245 1218 1176 1121
Tap 4 1227 1191 1169 1143 1105 1074
Tap 3 1227 1191 1169 1143 1105 1074
Tap 2 1087 1062 1030 1001 966 930
Tap 1 1026 1000 969 938 899 865
FB4C 042
Tap 5 1560 1544 1507 1464 1424 1358
Tap 4 1419 1397 1358 1320 1279 1239
Tap 3 1419 1397 1358 1320 1279 1239
Tap 2 1249 1220 1184 1142 1093 1052
Tap 1 1242 1205 1158 1110 1069 1026
FB4C 048
Tap 5 1743 1712 1679 1642 1610 1574
Tap 4 1669 1634 1599 1564 1531 1499
Tap 3 1669 1634 1599 1564 1531 1499
Tap 2 1452 1413 1377 1339 1308 1271
Tap 1 1300 1256 1221 1182 1142 1101
FB4C 060
Tap 5 1897 1867 1836 1808 1774 1736
Tap 4 1817 1785 1757 1724 1693 1655
Tap 3 1817 1785 1757 1724 1693 1655
Tap 2 1657 1621 1589 1557 1518 1474
Tap 1 1443 1412 1377 1332 1286 1243
FB4C 061
Tap 5 2030 1995 1961 1927 1888 1842
Tap 4 1811 1775 1740 1703 1664 1613
Tap 3 1811 1775 1740 1703 1664 1613
Tap 2 1665 1632 1593 1556 1507 1453
Tap 1 1462 1418 1371 1327 1278 1228
--- A i r f l o w a b o v e 4 5 0 c f m / t o n .
NOTES:
1. Airflow based upon dry coil at 230v with factory--- approved filter and electric heater (2 element heater sizes 018 through 036, 3 element
heater sizes 042 through 061). For FB4C models, airflow at 208 volts is approximately the same as 230 volts because the multi--- tap ECM
motor is a constant torque motor. The torque doesn’t drop off at the speeds the motor operates.
2. To avoid potential for condensate blowing out of drain pan prior to making drain trap:
Return static pressure must be less than 0.40 in. wc.
Horizontal ap plications of 042 --- 061 sizes must have supply static greater than 0.20 in. wc.
3. Airflow above 400 cfm/ton on 048---061 size could result in condensate blowing off coil or splashing out of drain pan.