IM 777-18 • SKYLINE OUTDOOR AIR HANDLER 34 www.DaikinApplied.com
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peraTIon
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uIdelInes
Setscrews
Setscrews on MPQ fan wheels must be installed using a
calibrated torque wrench to the value listed below, ±5%. The
fasteners must be periodically checked to satisfy agency
requirements for components on rotating machinery.
Table 14:
Setscrew Torque Specifications—Class II
Plenum Fans Only
Fan Size
Setscrew Size
Torque (ft .-lb)
Aluminum
Steel
11/12/13
3/8
19.2
N/A
15
3/8
19.2
N/A
16
3/8
19.2
N/A
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 15: Bearing Collar and Wheel Hub Set Screw Torque
(All Fans Except Class II Plenum Fans)
Setscrew Diameter (in .)
Minimum torque
ft/lbs (kg/m)
1/4
5.5 (0.76)
1/16
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)
