Daikin Vision - Page 27

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www.DaikinApplied.com 27 IM 915-13 • VISION - EXTENDED SIZES
Figure 43: Fan Wheel Rotation
Table 9: Wheel to Inlet Funnel Relationship—
Direct-Drive Class II Fans
Fan Size Overlap (in.)
18 0.38
20 0.41
22 0.45
24 0.50
27 0.55
30 0.61
33 0.67
36 0.75
40 0.82
44 0.91
Table 10: Wheel to Inlet Funnel Relationship—
Direct Drive Class III Fans
Fan Size Overlap (in.)
18 0.31
20 0.38
22 0.44
24 0.50
27 0.55
30 0.62
33 0.75
36 0.81
40 0.88
44 0.94
49 1.0
54 1.06
60 1.12
Table 11: Setscrew Torque Specications—
Class II Plenum Fans Only
Fan Size 
Torque (ft.-lb)
Aluminum Steel
18 3/8 19.2 N/A
20 3/8 19.2 N/A
22 3/8 19.2 N/A
24 3/8 19.2 N/A
27 3/8 19.2 22
30 1/2 41.7 55
33 1/2 41.7 55
36 1/2 41.7 55
40 1/2 41.7 55
44 1/2 41.7 55
49 1/2 41.7 55
54 1/2 41.7 55
60 3/4 115 150
Table 12: Bearing Collar and Wheel Hub Set Screw Torque
(all fans except Class II plenum fans)

(in)
Minimum torque

1/16 5.5 (0.76)
1/4 10.5 (1.45)
3/8 19.0 (2.63)
7/16 29.0 (4.01)
1/2 42.0 (5.81)
5/8
92.0 (12.72)