Airflow Performance Tables - Carrier FB4C Installation Instructions Manual

MODEL & SIZE
FB4C 018
FB4C 024 / 025
FB4C 030
FB4C 036
FB4C 042
FB4C 048
FB4C 060
FB4C 061
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 applications 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.

AIRFLOW PERFORMANCE TABLES

Table 1 – FB4C Airflow Performance (CFM)
BLOWER SPEED 0.10
Tap 5 767
Tap 4 614
Tap 3 701
Tap 2 614
Tap 1 410
Tap 5 969
Tap 4 826
Tap 3 826
Tap 2 701
Tap 1 617
Tap 5 1108
Tap 4 1026
Tap 3 1026
Tap 2 909
Tap 1 825
Tap 5 1301
Tap 4 1227
Tap 3 1227
Tap 2 1087
Tap 1 1026
Tap 5 1560
Tap 4 1419
Tap 3 1419
Tap 2 1249
Tap 1 1242
Tap 5 1743
Tap 4 1669
Tap 3 1669
Tap 2 1452
Tap 1 1300
Tap 5 1897
Tap 4 1817
Tap 3 1817
Tap 2 1657
Tap 1 1443
Tap 5 2030
Tap 4 1811
Tap 3 1811
Tap 2 1665
Tap 1 1462
0.20 0.30 0.40
739 702 669
569 534 486
660 616 581
569 534 486
350 304 261
936 892 835
795 766 743
795 766 743
660 616 581
592 552 507
1090 1065 1034
1000 969 938
1000 969 938
873 842 799
795 757 722
1276 1245 1218
1191 1169 1143
1191 1169 1143
1062 1030 1001
1000 969 938
1544 1507 1464
1397 1358 1320
1397 1358 1320
1220 1184 1142
1205 1158 1110
1712 1679 1642
1634 1599 1564
1634 1599 1564
1413 1377 1339
1256 1221 1182
1867 1836 1808
1785 1757 1724
1785 1757 1724
1621 1589 1557
1412 1377 1332
1995 1961 1927
1775 1740 1703
1775 1740 1703
1632 1593 1556
1418 1371 1327
10
0.50 0.60
620 565
436 398
537 499
436 398
228 203
763 676
706 660
706 660
537 499
472 420
1009 974
899 865
899 865
762 724
674 634
1176 1121
1105 1074
1105 1074
966 930
899 865
1424 1358
1279 1239
1279 1239
1093 1052
1069 1026
1610 1574
1531 1499
1531 1499
1308 1271
1142 1101
1774 1736
1693 1655
1693 1655
1518 1474
1286 1243
1888 1842
1664 1613
1664 1613
1507 1453
1278 1228