McQuay Skyline OAC 003G Installationshandbuch PDF herunterladen (Seite 22)

22 McQuay IM 777-7

Operation Guidelines

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 10: Setscrew Torque Specifications—Class II Plenum

Fans Only

Figure 34: Wheel-to-Inlet Funnel Relationship—Inline Fans

Table 11: Wheel-to-Inlet Funnel Relationship—Inline Fans

Table 12: Wheel to Inlet Funnel Relationship - Direct Drive

Class II fans

Table 13: Wheel to Inlet Funnel Relationship - Direct Drive

Class III fans

Table 14: Bearing Collar and Wheel Hub Set Screw Torque

(All Fans Except Class II Plenum Fans)

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

Wheel—funnel overlap

Size Overlap (in.)

150 0.375

165 0.438

182 0.562

200 0.625

222 0.688

245 0.750

270 0.812

300 0.875

330 1.000

365 1.125

402 1.250

445 1.375

Overlap

Fan Size Overlap (in.)

11 0.25

12 0.25

15 0.25

16 0.38

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

Fan Size Overlap (in.)

13 0.12

15 0.19

16 0.25

18 0.31

20 0.38

22 0.44

24 0.50

27 0.56

30 0.62

33 0.75

36 0.81

40 0.88

44 0.94

49 1.0

54 1.06

60 1.12

Set screw Minimum torque

Diameter (in) ft/lbs kg/m.

1/4 5.5 .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

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 39 40

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