Carrier 48NHT024 - Page 16

Table 12—Model 48N Air Delivery (Cfm) at Indicated External
Static Pressure & Voltage (Sizes 48NLT018 thru 48NHT048)
End Discharge
External Static Pressure—Inches Water
48N
Motor
I 208V
H 230V or 460V
Volt/Ph/Hz
Speed
0.0
0.1
0.2 0.3
0.4 0.5
0.0 0.1
0.2
0.3
0.4 0.5
48NLT018,
48NLT024, 48NHT024
A*
Low
712
700
689
680
663 651 750
737
726
716
700
686
208/230-1-60
•t
Med
1185
1129 1088
1026
979 922 1256
1195
1148
1081
1031
971
Hi
1370 1291
1221
1142 1063 1003
1442 1359
1285
1202
1119
1056
48NLT030, 48NMT030
At
Low 735
726
689 675 775
763
751
740
726
711
208/230-1-60
•t
Med
1184 1163
1150
1226
1211
1194 1164
1120
Hi
1443
1279 1197 1519
1489
1449
1399
1347 1261
48NHT030, LT036
48NMT036, LT042
At
Low
1002
854 796
1056
1022
986
946
900
839
48NMT042
208/230-1-60
•t
Med
1515
1452 1389
1308
BBS
1464 1378
1293
1164
208/230-3-60, 460-3-60
Hi
1764
■ S3
1857 1795
1708
1603
1457
1321
48NHT036, NVT036
48NHT042
A
Low
1610
1570
1504 1435
1358 1260
1787
1733
1641
1559 1458
1345
208/230-1-60
208/230-3-60
•
Med
1913
1820 1736
1645
1544 1428
1909
1806
1714 1603
1495
460-3-60f
Hi
2032 1942
1844
1759 1636
1514
1983
1883
1782
1665
1545
48NLT048, NMT048
48NHT048
A
Low
1627 1589
1527
1449
1364 1282
1807 1758
1704
1607 1518
1404
208/230-3-60
•
Med
1945 1880
1796 1708
1611 1508
2061
1970
1892
1813
1704 1580
460-3-60t
Hi
2138 2045
1943 1846
1738
1624 2178
2081
1941
1869 1769
1650
(Applicable notes are listed below Table 13.)
Table 13—Down Discharge
External Static Pressure—Inches Water
48N
Motor
i 208V
230V or 460V
Volt/Ph/Hz
Speed
0.0 0.1
0.2
0.3
0.4
0.5
0.0
0.1
0.2
0.3
0.4
0.5
48NLT018
48NLT024, 48NHT024
At
Low
705 692
684
671
657
639
743
730
721
707 693
674
208/230-1-60
•t
Med
1138 1102
1045
996 942
889 1196
1161
1101
1050
993
932
Hi
1308
1234
1162
1084 1020 951
1379
1301
1225
1143
1075
1002
48NLT030, 48NMT030
At
Low
724 715 706
695
682 665
763
754
744
733
719
701
208/230-1-60
•t
Med
1155 1138
1120
1104 1073
1031
1218 1200
1182
1165
1132
1088
Hi
1411 1362
1326
1249 1195
1133
1493 1457
1412
1358
1274 1218
48NHT030, LT036
48NMT036, LT042,
At
Low
969 947
911
863 816
760
1022 998
960
910 860
801
48NMT042
208/230-1-60
•t
Med
1494 1430 1358
1273 1174 1058
1574
1507 1431
1341 1237
1115
208/230-3-60, 460-3-60t
Hi
1683 1615
1536
1440
1274 1153
1763 1700
1619
1492
1343 1215
48NHT036, NVT036
48NHT042, NVT048
A
Low
1534 1493
1430
1359 1280
1200
1704 1638
1553
1468 1390
1304
208/230-1-60
208/230-3-60
•
Med
1797
1709
1620
1547 1448 1315
1855 1707
1684
1574 1498 1361
460-3-60f
Hi
1885
1779
1704
1608
1507
1404
1906
1821
1722
1623 1533
1410
48NLT048, 48NMT048
48NHT048
208/230-1-60
A
Low
1539
1515
1466
1410 1325
1229 1735
1688
1613
1539
1440
1334
208/230-3-60
208/230-3-60
•
Med
1833 1768
1700
1599 1505
1390 1918
1849
1752
1670 1561
1442
460-3-60t
Hi
1957 1873
1786
1907
1817
1713 1618
1506
• Factory blower motor speed setting for cooling operation.
A Factory blower motor speed setting for heating operation.
*Air delivery values are without air filter and are for dry coil. See Table 16 for wet coil pressure drop. Deduct field-supplied air filter pressure drop and
wet coil pressure drop to obtain external static pressure available for ducting.
|460 volt units high speed only. Do not change blower speed settings.
tFor 208V operation, change the blower motor speed setting to the next higher speed. See steps 6 and 9.
NOTE: Do not operate the unit at a cooling airflow that is less than 350 cfm per each 12,000 Btuh of rated cooling capacity. Indoor coil icing may occur
at airflows below this point.
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