25
Table 20 — Fan Performance — 48ZG,ZN,ZT,ZW,Z6,Z8 and 50ZG,ZN,ZT,ZW,ZX,ZZ,Z2,Z3,Z6,Z7,Z8,Z9090
Units With Airfoil Fan*
LEGEND
*If calculating static pressure for a 48 Series unit, be sure to add gas
heat pressure drop from Table 30C.
NOTES:
1. Fan performance is based on wet coils and clean 2-in. filters.
2. For return fan (48Z6,Z8 and 50Z6,Z7,Z8,Z9) and high-capacity
power exhaust (48ZT,ZW and 50ZT,ZW,ZX,ZZ) units, add com-
ponent pressure drop for economizer. Do not add component
pressure drop for power exhaust.
3. See Table 30C before using Fan Performance tables.
4. Conversion — Bhp to kW:
See Tables 26-28 for motor efficiency.
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.30 0.60 0.90 1.20 1.50 1.80 2.10 2.40
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
17,000 692 4.45 737 5.50 781 6.56 824 7.64 865 8.77 906 9.93 946 11.03 985 12.29
18,000 727 5.11 771 6.20 812 7.30 853 8.42 892 9.58 931 10.66 970 11.92 1008 13.22
20,000 798 6.60 838 7.80 876 8.98 913 10.18 950 11.31 985 12.59 1021 13.91 1056 15.28
22,000 870 8.37 907 9.66 942 10.83 977 12.14 1010 13.47 1043 14.83 1076 16.22 1108 17.65
24,000 942 10.42 977 11.73 1010 13.13 1042 14.54 1073 15.96 1103 17.40 1134 18.87 1163 20.37
26,000 1015 12.73 1047 14.26 1078 15.77 1108 17.28 1137 18.79 1166 20.32 1194 21.87 1222 23.44
28,000 1088 15.52 1118 17.15 1147 18.77 1176 20.38 1203 21.99 1230 23.61 1257 25.25 1283 26.90
30,000 1162 18.68 1190 20.43 1218 22.15 1244 23.87 1270 25.58 1296 27.29 1321 29.01 1345 30.75
32,000 1235 22.25 1262 24.12 1288 25.94 1313 27.76 1338 29.57 1362 31.38 1386 33.20 1409 35.02
34,000 1309 26.26 1335 28.23 1359 30.17 1383 32.09 1407 34.00 1430 35.91 1452 37.82 1475 39.73
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
2.70 3.00 3.30 3.60 3.90 4.20 4.50 4.80
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
17,000 1024 13.58 1061 14.90 1097 16.24 1132 17.59 1166 18.96 1199 20.35 1231 21.74 1262 23.14
18,000 1045 14.54 1081 15.90 1116 17.28 1150 18.69 1184 20.11 1216 21.54 1248 22.99 1279 24.45
20,000 1090 16.67 1124 18.10 1157 19.56 1190 21.05 1222 22.56 1253 24.09 1284 25.63 1314 27.19
22,000 1140 19.11 1171 20.61 1202 22.14 1233 23.69 1263 25.28 1293 26.88 1323 28.51 1352 30.16
24,000 1193 21.90 1222 23.45 1252 25.04 1280 26.67 1309 28.31 1337 29.99 1365 31.69 1393 33.42
26,000 1250 25.04 1277 26.67 1304 28.33 1331 30.01 1358 31.72 1385 33.46 1411 35.22 1437 37.01
28,000 1309 28.57 1335 30.27 1360 32.00 1386 33.75 1411 35.52 1436 37.32 1461 39.15 1486 40.99
30,000 1370 32.50 1394 34.28 1418 36.08 1442 37.89 1466 39.74 1490 41.60 1513 43.49 1537 45.40
32,000 1433 36.87 1456 38.72 1479 40.58 1501 42.48 1524 44.38 1546 46.32 1568 48.27 1591 50.25
34,000 1497 41.66 1519 43.60 1540 45.55 1562 47.52 1583 49.50 1605 51.50 1626 53.52 1647 55.56
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
5.10 5.40 5.70 6.00
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
17,000 1292 24.55 1322 25.97 1351 27.40 1379 28.83
18,000 1309 25.92 1338 27.40 1367 28.88 1395 30.37
20,000 1343 28.77 1372 30.35 1400 31.94 1428 33.55
22,000 1380 31.82 1408 33.50 1435 35.20 1462 36.90
24,000 1420 35.16 1447 36.92 1473 38.70 1499 40.49
26,000 1463 38.82 1489 40.66 1514 42.51 1539 44.38
28,000 1510 42.87 1535 44.77 1559 46.69 1583 48.63
30,000 1560 47.34 1583 49.30 1606 51.28 1629 53.28
32,000 1613 52.25 1635 54.27 1657 56.31 1678 58.37
34,000 1668 57.63 1689 59.70 1710 61.80 1730 63.93
48/50ZN,ZW,ZZ,Z3,Z8,Z9 units only.
Bhp — Brake Horsepower
Kilowatts = Bhp x .746
Motor efficiency