IM 915-13 • VISION - EXTENDED SIZES 38 www.DaikinApplied.com
Do not exceed the operating limits in the following tables. A fan
wheel operated beyond the rpm and temperature limits shown
can suer permanent distortion or fracture. The resulting
unbalance can cause severe unit vibration.
Table 19: Physical Data—Forward Curved and Airfoil Fans, Unit Sizes 107 to 169
Diameter Class I 20 (508) 22.38 (568) 25 (635) 27.62 (702) 30.25 (768) 33 (838) 36 (914) — — —
Maximum rpm 1010 930 790 690 650 600 560 — — —
Shaft and bearing diameter 1.438 (37) 1.438 (37) 1.688 (43) 1.688 (43) 1.688 (43) 2.188 (56) 2.188 (56) — — —
Outlet area – sq ft (sq m)
4.2
(0.39)
5.1
(0.474)
6.71
(0.623)
8.07
(0.75)
9.3
(0.864)
12.05
(1.119)
12.8
(1.189)
— — —
Diameter Class Il 20 (508) 22.38 (568) 25 (635) 27.62 (702) 30.25 (768) 33 (838) 36 (914) — — —
Maximum rpm 1281 1178 1011 910 835 763 715 — — —
Shaft and bearing diameter 1.688 (43) 2.188 (56) 2.438 (62) 2.438 (62) 2.688 (68) 2.688 (68) 2.688 (68) — — —
Outlet area – sq ft (sq m)
4.2
(0.39)
5.1
(0.474)
6.71
(0.623)
8.07
(0.750)
9.3
(0.864)
12.05
(1.119)
12.8
(1.189)
— — —
Airfoil fans – in. (mm)
Diameter Class I 20 (508) 22.25 (565) 24.5 (622) 27 (686) 30 (762) 33 (838) 36.5 (927)
40.25 (1022)
44.5 (1130) 49.0 (1244)
Maximum rpm 2077 1875 1691 1479 1328 1209 1073 972 884 805
Shaft and bearing diameter 1.688 (43) 1.938 (49) 2.188 (56) 2.188 (56) 2.438 (62) 2.438 (62) 2.438 (62) 2.938 (75) 3.188 (81) 3.438 (87)
Outlet area – sq ft (sq m)
4.14
(0.385)
5.12
(0.476)
6.21
(0.577)
7.54
(0.7)
9.31
(0.865)
11.27
(1.047)
13.79
(1.281)
16.77
(1.558)
20.5
(1.905)
24.9
(2.313)
Diameter Class II 20 (508) 22.25 (565) 24.5 (622) 27 (686) 30 (762) 33 (838) 36.5 (927) 40.25 (1022) 44.5 (1130) 49.0 (1244)
Maximum rpm 2703 2413 2199 1928 1730 1579 1401 1264 1146 1040
Shaft and bearing diameter 2.188 (56) 2.188 (56) 2.438 (62) 2.438 (62) 2.688 (68) 2.938 (75) 2.938 (75) 3.438 (87) 3.938 (100) 3.938 (100)
Outlet area – sq ft (sq m)
4.14
(0.385)
5.12
(0.476)
6.21
(0.577)
7.54
(0.7)
9.31
(0.865)
11.27
(1.047)
13.79
(1.281)
16.77
(1.558)
20.5
(1.905)
24.9
(2.313)
Diameter Class III — — — — — — 36.5 (927) 40.25 (1022) 44.5 (1130) 49.0 (1244)
Maximum rpm — — — — — — 1758 1586 1421 1308
Shaft and bearing diameter — — — — — — 3.438 (87) 3.438 (87) 3.438 (87) 3.938 (100)
Outlet area – sq ft (sq m) — — — — — —
13.8
(1.281)
16.8
(1.558)
20.5
(1.905)
24.9
(2.313)
Table 20: Operating Limits—Belt-Drive Plenum Fans
Size 18 20 22 24 27 30 33 36 40 44 49 54 60
Max RPM Class II 2930 2674 2403 2183 1860 1783 1620 1465 1329 1202 1091 986 891
Max RPM Class III 3735 3409 3065 2780 2423 2182 1984 1759 1598 1447 1314 1178 1071
Table 21: Operating Limits—Direct-Drive Plenum Fans
Size 18 20 22 24 27 30 33 36 40 44 49 54 60
Max RPM Class II 3650 2674 2403 2183 1981 1783 1620 1465 1329 1202 — — —
Max RPM Class III 3735 3409 3065 2780 2423 2182 1984 1759 1598 1447 1314 1178 1071